/* ========================================================
   SHARED SITE SHELL
   Navigation, page hierarchy, reusable components, footer,
   responsive behavior, and accessibility for every page.
   ======================================================== */

:root {
    --site-container: 1240px;
    --site-nav-height: 74px;
    --section-space: clamp(4.5rem, 8vw, 7.5rem);
    --focus-ring: 0 0 0 3px var(--bg-base), 0 0 0 6px var(--neon-blue);
}

body[data-theme="dark"] {
    --nav-surface: rgba(7, 7, 10, 0.9);
    --subtle-surface: rgba(255, 255, 255, 0.035);
    --strong-surface: rgba(255, 255, 255, 0.075);
    --footer-surface: rgba(3, 3, 5, 0.72);
    --button-primary-bg: #f8fafc;
    --button-primary-text: #09090b;
}

body[data-theme="light"] {
    --nav-surface: rgba(249, 249, 251, 0.92);
    --subtle-surface: rgba(15, 23, 42, 0.035);
    --strong-surface: rgba(15, 23, 42, 0.075);
    --footer-surface: rgba(238, 239, 244, 0.86);
    --button-primary-bg: #0a0a0e;
    --button-primary-text: #ffffff;
}

body {
    text-rendering: optimizeLegibility;
}

html {
    overflow-x: clip;
}

img,
video,
iframe,
svg {
    max-width: 100%;
}

main,
section,
article,
aside {
    min-width: 0;
}

body::selection {
    background: var(--text-primary);
    color: var(--bg-base);
}

a,
button,
input,
textarea,
select {
    -webkit-tap-highlight-color: transparent;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
[tabindex]:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring) !important;
}

.skip-link {
    position: fixed;
    top: 0.75rem;
    left: 0.75rem;
    z-index: 10000;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    background: var(--button-primary-bg);
    color: var(--button-primary-text);
    font-weight: 800;
    text-decoration: none;
    transform: translateY(-160%);
    transition: transform 0.2s ease;
}

.skip-link:focus {
    transform: translateY(0);
}

.sr-only {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

.container {
    width: min(100%, var(--site-container));
    margin-inline: auto;
    padding-inline: clamp(1rem, 3vw, 1.75rem);
}

/* ---------- Global navigation ---------- */
nav.site-nav {
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%;
    flex: none;
    background: var(--nav-surface);
    border-bottom: 1px solid var(--glass-border);
    box-shadow: var(--glass-inner-sheen), 0 12px 35px rgba(0, 0, 0, 0.16);
    backdrop-filter: blur(24px) saturate(160%);
    -webkit-backdrop-filter: blur(24px) saturate(160%);
}

.nav-inner {
    min-height: var(--site-nav-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    position: relative;
}

.brand-logo {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    color: inherit;
    text-decoration: none;
    flex: 0 0 auto;
}

.brand-badge-monochrome {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    display: grid;
    place-items: center;
    flex: 0 0 auto;
    background: var(--button-primary-bg);
    color: var(--button-primary-text);
    border: 1px solid var(--glass-border-hover);
    box-shadow: 0 7px 22px var(--white-glow);
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.05rem;
    font-weight: 900;
    letter-spacing: -0.04em;
}

.brand-title-group {
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
}

.brand-title-text {
    color: var(--text-primary);
    font-family: 'Outfit', sans-serif;
    font-size: 1.08rem;
    font-weight: 850;
    letter-spacing: -0.02em;
    line-height: 1.1;
    white-space: nowrap;
}

.brand-title-sub {
    color: var(--text-muted);
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.61rem;
    font-weight: 750;
    letter-spacing: 0.12em;
    line-height: 1.25;
    text-transform: uppercase;
    white-space: nowrap;
}

.central-theme-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.2rem;
    padding: 0.22rem;
    flex: 0 0 auto;
    border: 1px solid var(--glass-border);
    border-radius: 999px;
    background: var(--subtle-surface);
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.16);
}

.theme-pill-btn {
    min-height: 34px;
    padding: 0.45rem 0.72rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.38rem;
    border: 0;
    border-radius: 999px;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.72rem;
    font-weight: 800;
    transition: var(--transition-smooth);
}

.theme-pill-btn:hover {
    color: var(--text-primary);
}

.theme-pill-btn.active {
    background: var(--button-primary-bg);
    color: var(--button-primary-text);
    box-shadow: 0 4px 14px var(--white-glow);
}

.nav-links {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: clamp(0.65rem, 1.3vw, 1.15rem);
    min-width: 0;
}

.nav-link,
.btn-nav-cert {
    min-height: 38px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.42rem;
    color: var(--text-secondary);
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.78rem;
    font-weight: 760;
    line-height: 1;
    text-decoration: none;
    white-space: nowrap;
    transition: var(--transition-smooth);
}

.nav-link {
    position: relative;
    padding: 0.45rem 0.05rem;
}

.nav-link::after {
    content: '';
    position: absolute;
    left: 0;
    right: 100%;
    bottom: 2px;
    height: 2px;
    border-radius: 2px;
    background: var(--text-primary);
    transition: right 0.25s ease;
}

.nav-link:hover,
.nav-link.active,
.nav-link[aria-current="page"] {
    color: var(--text-primary) !important;
}

.nav-link:hover::after,
.nav-link.active::after,
.nav-link[aria-current="page"]::after {
    right: 0;
}

.btn-nav-cert {
    padding: 0.55rem 0.85rem;
    border: 1px solid var(--glass-border-hover);
    border-radius: 999px;
    background: var(--strong-surface);
    color: var(--text-primary);
}

.btn-nav-cert:hover,
.btn-nav-cert.active,
.btn-nav-cert[aria-current="page"] {
    transform: translateY(-1px);
    background: var(--button-primary-bg);
    color: var(--button-primary-text);
    border-color: transparent;
}

body[data-theme="dark"] .btn-nav-cert,
body[data-theme="dark"] .btn-nav-cert:hover,
body[data-theme="dark"] .btn-nav-cert.active,
body[data-theme="dark"] .btn-nav-cert[aria-current="page"] {
    background: rgba(255, 255, 255, 0.09);
    color: #ffffff !important;
    border-color: rgba(255, 255, 255, 0.28);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.12), 0 8px 24px rgba(0, 0, 0, 0.28);
}

body[data-theme="dark"] .btn-nav-cert:hover,
body[data-theme="dark"] .btn-nav-cert.active,
body[data-theme="dark"] .btn-nav-cert[aria-current="page"] {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.48);
}

.hamburger-btn {
    width: 42px;
    height: 42px;
    display: none;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    background: var(--subtle-surface);
    color: var(--text-primary);
    cursor: pointer;
    font-size: 1rem;
}

/* ---------- Shared hierarchy ---------- */
.page-header {
    position: relative;
    isolation: isolate;
    overflow: hidden;
    padding: clamp(4rem, 9vw, 7rem) 0 clamp(3rem, 7vw, 5rem) !important;
    text-align: center;
    border-bottom: 1px solid var(--glass-border);
    background:
        radial-gradient(circle at 50% 0%, var(--strong-surface), transparent 58%),
        linear-gradient(180deg, var(--subtle-surface), transparent);
}

.page-header::before {
    content: '';
    position: absolute;
    z-index: -1;
    width: min(54vw, 700px);
    aspect-ratio: 1;
    left: 50%;
    top: -85%;
    translate: -50% 0;
    border-radius: 50%;
    border: 1px solid var(--glass-border);
    opacity: 0.52;
}

.section-header-block {
    max-width: 820px;
    margin: 0 auto clamp(2rem, 4vw, 3rem);
    text-align: center;
}

.section-kicker {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.8rem;
    color: var(--text-muted);
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.72rem;
    font-weight: 850;
    letter-spacing: 0.17em;
    line-height: 1.4;
    text-transform: uppercase;
}

.section-kicker::before {
    content: '';
    width: 1.6rem;
    height: 1px;
    background: currentColor;
}

.section-title {
    margin: 0;
    color: var(--text-primary);
    font-family: 'Outfit', sans-serif;
    font-size: clamp(2rem, 5vw, 3.7rem);
    font-weight: 850;
    letter-spacing: -0.045em;
    line-height: 1.05;
    text-wrap: balance;
}

.page-header .section-title {
    max-width: 950px;
    margin: 0 auto 1rem !important;
}

.section-desc {
    max-width: 760px;
    margin: 1rem auto 0;
    color: var(--text-muted);
    font-size: clamp(0.96rem, 1.8vw, 1.08rem);
    line-height: 1.75;
    text-wrap: pretty;
}

.page-header .section-desc {
    margin-inline: auto !important;
}

.section-action-row {
    margin-top: clamp(1.75rem, 4vw, 2.75rem);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.site-cta {
    min-height: 46px;
    padding: 0.72rem 1.15rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.55rem;
    border: 1px solid var(--glass-border-hover);
    border-radius: 999px;
    background: var(--button-primary-bg);
    color: var(--button-primary-text);
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.86rem;
    font-weight: 820;
    text-decoration: none;
    transition: var(--transition-smooth);
}

.site-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 30px var(--white-glow);
}

.site-cta.is-secondary {
    background: var(--subtle-surface);
    color: var(--text-primary);
    border-color: var(--glass-border);
}

.btn-hero-primary,
.btn-hero-secondary,
.domain-btn,
.doc-action-btn,
.cv-action-btn {
    min-height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    border-radius: 999px;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 800;
    line-height: 1.2;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.domain-btn {
    padding: 0.65rem 1rem;
    border: 1px solid transparent;
    font-size: 0.8rem;
}

.domain-btn-primary,
.doc-action-primary,
.cv-action-primary,
.btn-hero-primary {
    background: var(--button-primary-bg) !important;
    color: var(--button-primary-text) !important;
}

.domain-btn-secondary,
.doc-action-secondary,
.cv-action-secondary,
.btn-hero-secondary {
    background: var(--subtle-surface) !important;
    color: var(--text-primary) !important;
    border-color: var(--glass-border) !important;
}

.domain-btn:hover,
.doc-action-btn:hover,
.cv-action-btn:hover,
.btn-hero-primary:hover,
.btn-hero-secondary:hover {
    transform: translateY(-2px);
    border-color: var(--glass-border-hover) !important;
    box-shadow: 0 10px 25px var(--white-glow);
}

.doc-icon-capsule {
    width: 52px;
    height: 52px;
    display: grid;
    place-items: center;
    flex: 0 0 auto;
    margin-bottom: 1.2rem;
    border: 1px solid var(--glass-border);
    border-radius: 14px;
    background: var(--strong-surface);
    color: var(--text-primary);
    font-size: 1.25rem;
}

.venture-link-pill {
    color: var(--text-primary);
    text-decoration: none;
}

.domain-actions,
.doc-actions {
    flex-wrap: wrap;
}

/* ---------- Consistent cards and controls ---------- */
.venture-card,
.track-card,
.project-card,
.material-card,
.achievement-card,
.timeline-card,
.domain-card,
.doc-card,
.edu-card,
.pub-card,
.cv-hero-box {
    border-color: var(--glass-border) !important;
    background: var(--glass-card) !important;
    box-shadow: var(--card-shadow), var(--glass-inner-sheen) !important;
}

.venture-card:hover,
.track-card:hover,
.project-card:hover,
.material-card:hover,
.achievement-card:hover,
.domain-card:hover,
.doc-card:hover,
.edu-card:hover,
.pub-card:hover {
    border-color: var(--glass-border-hover) !important;
}

.filter-pill,
.category-tab-btn,
.cat-chip,
.filter-btn {
    border-color: var(--glass-border) !important;
    background: var(--glass-card) !important;
    color: var(--text-secondary) !important;
}

.filter-pill.active,
.category-tab-btn.active,
.cat-chip.active,
.filter-btn.active {
    border-color: transparent !important;
    background: var(--button-primary-bg) !important;
    color: var(--button-primary-text) !important;
}

/* ---------- Homepage directory ---------- */
.site-directory-section {
    position: relative;
    padding: var(--section-space) 0;
    border-block: 1px solid var(--glass-border);
    background:
        linear-gradient(135deg, var(--subtle-surface), transparent 42%),
        radial-gradient(circle at 90% 10%, var(--strong-surface), transparent 35%);
}

.site-directory-intro {
    max-width: 790px;
    margin-bottom: clamp(2rem, 5vw, 3.5rem);
}

.site-directory-intro .section-desc {
    margin-left: 0;
}

.page-preview-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(1rem, 2.4vw, 1.5rem);
}

.page-preview-card {
    position: relative;
    min-height: 330px;
    padding: clamp(1.4rem, 3vw, 2rem);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    background: var(--glass-card);
    color: inherit;
    text-decoration: none;
    box-shadow: var(--card-shadow), var(--glass-inner-sheen);
    transition: var(--transition-smooth);
}

.page-preview-card::before {
    content: '';
    position: absolute;
    inset: 0 0 auto;
    height: 3px;
    background: linear-gradient(90deg, var(--text-primary), transparent 82%);
    opacity: 0.75;
}

.page-preview-card::after {
    content: '';
    position: absolute;
    width: 230px;
    height: 230px;
    right: -120px;
    top: -120px;
    border: 1px solid var(--glass-border);
    border-radius: 50%;
    transition: var(--transition-smooth);
}

.page-preview-card:hover {
    transform: translateY(-5px);
    border-color: var(--glass-border-hover);
    background: var(--glass-card-hover);
}

.page-preview-card:hover::after {
    scale: 1.15;
    border-color: var(--glass-border-hover);
}

.preview-topline {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.35rem;
}

.preview-icon {
    width: 48px;
    height: 48px;
    display: grid;
    place-items: center;
    border: 1px solid var(--glass-border);
    border-radius: 14px;
    background: var(--strong-surface);
    color: var(--text-primary);
    font-size: 1.15rem;
}

.preview-index {
    color: var(--text-ghost);
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.72rem;
    font-weight: 850;
    letter-spacing: 0.12em;
}

.preview-eyebrow {
    color: var(--text-muted);
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.68rem;
    font-weight: 850;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.preview-title {
    margin: 0.45rem 0 0.75rem;
    color: var(--text-primary);
    font-family: 'Outfit', sans-serif;
    font-size: clamp(1.4rem, 3vw, 2rem);
    font-weight: 850;
    letter-spacing: -0.035em;
    line-height: 1.12;
}

.preview-copy {
    max-width: 58ch;
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.65;
}

.preview-facts {
    margin: 1.25rem 0 1.5rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
    list-style: none;
}

.preview-facts li {
    padding: 0.35rem 0.62rem;
    border: 1px solid var(--glass-border);
    border-radius: 999px;
    background: var(--subtle-surface);
    color: var(--text-muted);
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.68rem;
    font-weight: 750;
}

.preview-cta {
    margin-top: auto;
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    color: var(--text-primary);
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.82rem;
    font-weight: 850;
}

.preview-cta i {
    transition: transform 0.25s ease;
}

.page-preview-card:hover .preview-cta i {
    transform: translateX(4px);
}

/* ---------- Shared footer ---------- */
.site-footer {
    position: relative;
    z-index: 2;
    border-top: 1px solid var(--glass-border);
    background: var(--footer-surface) !important;
    padding: clamp(2.75rem, 6vw, 4.5rem) 0 1.5rem !important;
    text-align: left !important;
}

.footer-main {
    display: grid;
    grid-template-columns: minmax(240px, 1.25fr) minmax(280px, 1fr);
    align-items: start;
    gap: clamp(2rem, 5vw, 5rem);
}

.footer-name {
    margin-bottom: 0.45rem;
    color: var(--text-primary);
    font-family: 'Outfit', sans-serif;
    font-size: 1.35rem;
    font-weight: 850;
    letter-spacing: -0.02em;
}

.footer-summary {
    max-width: 620px;
    color: var(--text-muted);
    font-size: 0.88rem;
    line-height: 1.65;
}

.footer-nav {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.4rem 1rem;
}

.footer-nav a {
    padding: 0.35rem 0;
    color: var(--text-secondary);
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.8rem;
    font-weight: 750;
    text-decoration: none;
}

.footer-nav a:hover {
    color: var(--text-primary);
}

.footer-bottom {
    margin-top: clamp(2rem, 5vw, 3.5rem);
    padding-top: 1.1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    border-top: 1px solid var(--glass-border);
    color: var(--text-ghost);
    font-size: 0.74rem;
}

.footer-bottom a {
    color: var(--text-muted);
    text-decoration: none;
}

/* ---------- Certificate archive: shared shell, specialist workspace ---------- */
.certificates-page .site-nav {
    isolation: isolate;
    background:
        linear-gradient(135deg, var(--subtle-surface), transparent 48%),
        var(--nav-surface);
}

.certificate-command-shell {
    position: relative;
    border-top: 1px solid var(--glass-border);
    background:
        radial-gradient(circle at 8% 0%, var(--strong-surface), transparent 38%),
        linear-gradient(90deg, transparent, var(--subtle-surface), transparent);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.certificate-command-bar {
    width: min(100%, 1680px);
    min-height: 76px;
    margin-inline: auto;
    padding: 0.65rem clamp(1rem, 2.3vw, 2.2rem);
    display: grid;
    grid-template-columns: minmax(280px, 1fr) auto;
    align-items: center;
    gap: clamp(1rem, 2.2vw, 2.25rem);
}

.certificate-context {
    min-width: 0;
    display: flex;
    align-items: center;
    gap: 0.9rem;
}

.certificates-page .brand-badge {
    width: 46px;
    height: 46px;
    flex: 0 0 46px;
    border-radius: 13px;
    background: var(--button-primary-bg);
    color: var(--button-primary-text);
    border: 1px solid var(--glass-border-hover);
    box-shadow: 0 6px 20px var(--white-glow);
    font-size: 1.1rem;
}

.certificates-page .brand-titles {
    min-width: 0;
    gap: 0.1rem;
}

.archive-eyebrow {
    color: var(--text-muted);
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.58rem;
    font-weight: 850;
    letter-spacing: 0.15em;
    line-height: 1.2;
    text-transform: uppercase;
}

.certificates-page .brand-title-main {
    max-width: min(46vw, 720px);
    color: var(--text-primary);
    font-size: clamp(0.96rem, 1.35vw, 1.17rem);
    letter-spacing: -0.015em;
    line-height: 1.18;
    text-transform: none;
}

.certificates-page .brand-subtitle-meta {
    min-width: 0;
    gap: 0.45rem;
    color: var(--text-muted);
    font-size: 0.7rem;
    white-space: nowrap;
    overflow: hidden;
}

.certificates-page .brand-subtitle-meta span {
    overflow: hidden;
    text-overflow: ellipsis;
}

.certificate-command-controls {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.65rem;
}

.certificates-page .header-center-controls {
    flex: 0 0 auto;
    gap: 0.2rem;
    padding: 0.22rem;
    border-radius: 999px;
    background: var(--subtle-surface);
}

.certificates-page .view-btn {
    min-height: 42px;
    padding: 0.52rem 0.82rem;
    justify-content: center;
    border-radius: 999px;
    font-size: 0.76rem;
    white-space: nowrap;
}

.certificates-page .view-btn.active,
.certificates-page .btn-slideshow {
    background: var(--button-primary-bg);
    color: var(--button-primary-text);
    box-shadow: 0 4px 14px var(--white-glow);
}

.view-count {
    min-width: 1.45rem;
    padding: 0.1rem 0.36rem;
    border-radius: 999px;
    background: var(--strong-surface);
    font-size: 0.62rem;
    line-height: 1.3;
}

.certificates-page .view-btn.active .view-count {
    background: rgba(127, 127, 127, 0.2);
}

.certificates-page .header-actions {
    width: auto;
    display: flex;
    flex: 0 0 auto;
    flex-wrap: nowrap;
    justify-content: flex-end;
    gap: 0.4rem;
}

.certificates-page .btn-action,
.certificates-page .icon-btn-tool {
    min-height: 42px;
    border-color: var(--glass-border);
    background: var(--subtle-surface);
    box-shadow: var(--glass-inner-sheen);
}

.certificates-page .btn-action {
    padding: 0.55rem 0.85rem;
    border-radius: 999px;
    font-size: 0.76rem;
}

.certificates-page .header-actions .btn-action.btn-slideshow {
    background: var(--button-primary-bg);
    border-color: var(--button-primary-bg);
    color: var(--button-primary-text);
    box-shadow: 0 6px 18px var(--white-glow);
}

.certificates-page .header-actions .btn-action.btn-slideshow:hover,
.certificates-page .header-actions .btn-action.btn-slideshow:focus-visible {
    background: var(--button-primary-bg);
    border-color: var(--button-primary-bg);
    color: var(--button-primary-text);
    box-shadow: 0 9px 24px var(--white-glow);
}

.certificates-page .header-actions .btn-action.btn-slideshow:focus-visible {
    outline: 3px solid var(--neon-cyan);
    outline-offset: 3px;
}

.certificates-page .header-actions .btn-action.btn-slideshow.playing {
    background: linear-gradient(135deg, #10b981, #059669);
    border-color: #34d399;
    color: #ffffff;
    box-shadow: 0 0 18px rgba(16, 185, 129, 0.42);
}

.certificates-page .icon-btn-tool {
    width: 42px;
    height: 42px;
    border-radius: 50%;
}

.certificates-page .mobile-stage-tool {
    display: none;
}

.certificates-page .slideshow-progress-bar {
    position: fixed;
    top: 0;
    z-index: 1200;
    background: linear-gradient(90deg, var(--text-primary), var(--electric-gold));
}

.certificates-page #bg-particles {
    opacity: 0.26;
}

/* The stage uses perspective, which creates a stacking context. Lift that
   context above both side panels so its two navigation buttons overlap the
   cards symmetrically instead of the later stats panel covering Next. */
.certificates-page .stage-center {
    z-index: 2;
}

.certificates-page .panel-info,
.certificates-page .panel-stats {
    z-index: 1;
}

.certificates-page .panel-info,
.certificates-page .panel-stats,
.certificates-page .certificate-frame,
.certificates-page .timeline-wheel-wrapper,
.certificates-page .filter-toolbar,
.certificates-page .cert-card {
    border-color: var(--glass-border);
    background: var(--glass-card);
    box-shadow: var(--card-shadow), var(--glass-inner-sheen);
}

/* Keep the complete spotlight composition—including the active year—inside
   one desktop viewport. The nav height is measured in certificates.html so
   this remains accurate if the shared header changes. */
@media (min-width: 1025px) {
    .certificates-page > main.main-viewport {
        flex: 0 0 auto;
        width: 100%;
        height: calc(100dvh - var(--certificate-nav-height, 150px));
        min-height: 0;
        overflow: hidden;
    }

    .certificates-page .spotlight-container {
        flex: 1 1 auto;
        height: auto;
        min-height: 0;
        margin-bottom: 0.75rem;
    }

    .certificates-page .stage-center,
    .certificates-page .panel-info,
    .certificates-page .panel-stats {
        min-height: 0;
    }

    .certificates-page .certificate-frame {
        max-height: none;
    }

    .certificates-page .timeline-wheel-wrapper {
        flex: 0 0 auto;
        margin-top: 0;
    }

    .certificates-page.gallery-mode > main.main-viewport {
        height: auto;
        min-height: calc(100dvh - var(--certificate-nav-height, 150px));
        overflow: visible;
    }
}

@media (min-width: 1025px) and (max-height: 820px) {
    .certificates-page > main.main-viewport {
        padding-top: 0.75rem;
        padding-bottom: 0.45rem;
    }

    .certificates-page .spotlight-container {
        gap: 1rem;
        margin-bottom: 0.55rem;
    }

    .certificates-page .panel-info,
    .certificates-page .panel-stats {
        padding: 1rem;
    }

    .certificates-page .panel-info-header,
    .certificates-page .stats-scope-toggle {
        margin-bottom: 0.5rem;
    }

    .certificates-page .panel-info-header {
        padding-bottom: 0.5rem;
    }

    .certificates-page .panel-tag {
        margin-bottom: 0.25rem;
        padding: 3px 7px;
        font-size: 0.62rem;
    }

    .certificates-page .panel-info-title {
        font-size: 1.05rem;
        line-height: 1.25;
    }

    .certificates-page .meta-list,
    .certificates-page .stat-rows {
        gap: 0.38rem;
    }

    .certificates-page .meta-item {
        gap: 0;
    }

    .certificates-page .meta-label,
    .certificates-page .stat-name {
        font-size: 0.67rem;
        letter-spacing: 0.085em;
    }

    .certificates-page .meta-value {
        font-size: 0.8rem;
        line-height: 1.28;
    }

    .certificates-page .meta-value.highlight {
        font-size: 0.86rem;
    }

    .certificates-page .panel-info-footer,
    .certificates-page .panel-stats-footer {
        margin-top: 0.5rem;
        padding-top: 0.45rem;
    }

    .certificates-page .panel-info-footer {
        gap: 0.35rem;
    }

    .certificates-page .btn-drive-link {
        padding: 7px 10px;
        font-size: 0.75rem;
    }

    .certificates-page .btn-preview-mode {
        padding: 6px 8px;
        font-size: 0.7rem;
    }

    .certificates-page .stat-group-main {
        margin-bottom: 0.45rem;
        padding-bottom: 0.4rem;
    }

    .certificates-page .stat-number-huge {
        font-size: 2.35rem;
    }

    .certificates-page .stat-row {
        gap: 0.55rem;
        padding-block: 1px;
    }

    .certificates-page .stat-val {
        min-width: 32px;
        font-size: 1.1rem;
    }

    .certificates-page .panel-stats-footer {
        font-size: 0.68rem;
    }

    .certificates-page .timeline-wheel-wrapper {
        padding-block: 0.25rem;
    }

    .certificates-page .wheel-center-pod {
        min-width: 160px;
        padding-block: 4px;
    }

    .certificates-page .wheel-roller-window {
        height: 36px;
    }

    .certificates-page .wheel-year-display {
        font-size: 1.65rem;
    }

    .certificates-page .wheel-arrow-btn {
        width: 38px;
        height: 38px;
    }
}

/* ---------- Responsive ---------- */
@media (max-width: 1260px) {
    .hamburger-btn {
        display: inline-flex;
    }

    .nav-links {
        position: absolute;
        z-index: 1100;
        top: calc(100% + 1px);
        left: 1rem;
        right: 1rem;
        display: none;
        padding: 0.75rem;
        flex-direction: column;
        align-items: stretch;
        gap: 0.25rem;
        border: 1px solid var(--glass-border);
        border-radius: 0 0 var(--radius-md) var(--radius-md);
        background: var(--nav-surface);
        box-shadow: var(--card-shadow);
        backdrop-filter: blur(24px) saturate(160%);
        -webkit-backdrop-filter: blur(24px) saturate(160%);
    }

    .nav-links.is-open,
    .nav-links.open,
    .nav-links.mobile-open {
        display: flex;
        animation: mobile-menu-in 180ms ease-out both;
    }

    @keyframes mobile-menu-in {
        from {
            opacity: 0;
            transform: translateY(-8px) scale(0.985);
        }
        to {
            opacity: 1;
            transform: translateY(0) scale(1);
        }
    }

    .nav-link,
    .btn-nav-cert {
        width: 100%;
        min-height: 44px;
        justify-content: flex-start;
        padding-inline: 0.8rem;
        border-radius: 10px;
    }

    .nav-link::after {
        display: none;
    }

    .nav-link:hover,
    .nav-link.active,
    .nav-link[aria-current="page"] {
        background: var(--strong-surface);
    }

    .certificates-page header.site-header {
        position: relative;
        top: auto;
    }
}

@media (max-width: 760px) {
    :root {
        --site-nav-height: 66px;
    }

    .nav-inner {
        min-height: var(--site-nav-height);
        gap: 0.55rem;
    }

    .brand-badge-monochrome {
        width: 38px;
        height: 38px;
        border-radius: 10px;
        font-size: 0.95rem;
    }

    .brand-title-text {
        font-size: 0.96rem;
    }

    .brand-title-sub {
        font-size: 0.54rem;
    }

    .theme-pill-btn {
        width: 34px;
        height: 32px;
        min-height: 32px;
        padding: 0;
    }

    .theme-label {
        display: none;
    }

    .page-preview-grid {
        grid-template-columns: 1fr;
    }

    .page-preview-card {
        min-height: 0;
    }

    .footer-main {
        grid-template-columns: 1fr;
    }

    .footer-bottom {
        align-items: flex-start;
        flex-direction: column;
    }

    .certificates-page .header-actions {
        width: 100%;
        flex-wrap: nowrap;
        justify-content: flex-start;
        overflow-x: auto;
        padding-bottom: 0.25rem;
        scrollbar-width: thin;
    }
}

@media (max-width: 520px) {
    .brand-title-sub {
        display: none;
    }

    .central-theme-toggle {
        margin-left: auto;
    }

    .nav-links {
        left: 0;
        right: 0;
    }

    .page-header {
        padding-inline: 0 !important;
    }

    .filter-controls-bar,
    .search-box-wrap {
        min-width: 0 !important;
        width: 100%;
    }

    .footer-nav {
        grid-template-columns: 1fr;
    }
}

/* ---------- Modern liquid-glass responsive refinement ---------- */
@supports ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
    .site-nav,
    .nav-links,
    .page-preview-card,
    .venture-card,
    .track-card,
    .project-card,
    .material-card,
    .achievement-card,
    .skill-card,
    .domain-card,
    .doc-card,
    .edu-card,
    .pub-card,
    .cv-profile-card,
    .cv-detail-card,
    .cv-hero-box,
    .panel-info,
    .panel-stats,
    .timeline-wheel-wrapper {
        -webkit-backdrop-filter: blur(22px) saturate(150%);
        backdrop-filter: blur(22px) saturate(150%);
    }
}

@media (max-width: 1260px) {
    nav.site-nav .nav-links {
        top: calc(100% + 1px);
        left: clamp(0.75rem, 3vw, 1rem);
        right: clamp(0.75rem, 3vw, 1rem);
        width: auto;
        max-height: calc(100dvh - var(--site-nav-height) - 1rem);
        overflow-y: auto;
        overscroll-behavior: contain;
        border: 1px solid var(--glass-border);
        border-radius: 0 0 20px 20px;
        background:
            linear-gradient(145deg, var(--strong-surface), transparent 60%),
            var(--nav-surface);
        box-shadow: 0 24px 55px rgba(0, 0, 0, 0.3), var(--glass-inner-sheen);
    }

    nav.site-nav .nav-links.is-open,
    nav.site-nav .nav-links.open,
    nav.site-nav .nav-links.mobile-open {
        display: flex;
    }

    .certificate-command-bar {
        grid-template-columns: minmax(0, 1fr);
        gap: 0.65rem;
    }

    .certificate-command-controls {
        min-width: 0;
        justify-content: space-between;
    }
}

@media (max-width: 768px) {
    :root {
        --section-space: clamp(3.75rem, 14vw, 5rem);
    }

    html {
        scroll-padding-top: calc(var(--site-nav-height) + 0.75rem);
    }

    body {
        overflow-wrap: anywhere;
        -webkit-text-size-adjust: 100%;
    }

    .container {
        padding-inline: clamp(0.9rem, 4vw, 1.1rem);
    }

    .nav-inner {
        padding-inline: 0;
    }

    .brand-logo {
        gap: 0.55rem;
        min-width: 0;
    }

    .brand-title-group {
        overflow: hidden;
    }

    .brand-title-text {
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .hamburger-btn,
    .theme-pill-btn,
    .nav-link,
    .btn-nav-cert,
    .filter-pill,
    .category-tab-btn,
    .cat-chip,
    .filter-btn {
        min-height: 44px;
    }

    nav.site-nav .nav-links {
        padding: 0.65rem;
        gap: 0.2rem;
    }

    nav.site-nav .nav-link,
    nav.site-nav .btn-nav-cert {
        padding: 0.8rem;
        border-radius: 12px;
    }

    .page-header {
        padding: clamp(3.2rem, 14vw, 4.75rem) 0 clamp(2.5rem, 11vw, 3.5rem) !important;
    }

    .page-header::before {
        width: 112vw;
        top: -48%;
    }

    .section-header-block {
        margin-bottom: 2rem;
    }

    .section-kicker {
        font-size: 0.64rem;
        letter-spacing: 0.13em;
    }

    .section-title,
    .page-header .section-title {
        font-size: clamp(2.05rem, 10.5vw, 3.2rem) !important;
        line-height: 1.02;
        letter-spacing: -0.055em;
    }

    .section-desc,
    .page-header .section-desc {
        font-size: 0.94rem;
        line-height: 1.65;
    }

    .site-cta,
    .section-action-row > a {
        width: 100%;
    }

    .page-preview-card,
    .venture-card,
    .track-card,
    .project-card,
    .material-card,
    .achievement-card,
    .domain-card,
    .doc-card,
    .edu-card,
    .pub-card,
    .cv-profile-card,
    .cv-detail-card,
    .cv-hero-box {
        border-radius: 20px !important;
        box-shadow: 0 18px 42px rgba(0, 0, 0, 0.22), var(--glass-inner-sheen) !important;
    }

    .page-preview-card {
        min-height: 0;
        padding: 1.25rem;
    }

    .preview-topline {
        margin-bottom: 1rem;
    }

    .preview-title {
        font-size: 1.55rem;
    }

    .footer-nav {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .footer-nav a {
        min-height: 42px;
        display: flex;
        align-items: center;
        padding: 0.55rem 0;
    }

    /* Homepage */
    .hero-fullscreen {
        min-height: auto;
        align-items: flex-start;
        background-position: 58% center;
    }

    .hero-container {
        padding: clamp(3.5rem, 14vw, 5rem) 1rem 3.5rem !important;
    }

    .hero-badge-capsule {
        max-width: 100%;
        padding: 0.55rem 0.75rem;
        font-size: 0.72rem;
        line-height: 1.45;
    }

    .hero-name {
        font-size: clamp(2.8rem, 14vw, 4.15rem) !important;
        letter-spacing: -0.055em;
    }

    .hero-student-sub {
        font-size: 1.05rem;
        line-height: 1.45;
    }

    .hero-roles-typed-box {
        min-height: 3.2rem;
        font-size: 0.96rem;
        align-items: flex-start;
    }

    .hero-badges-row {
        margin-inline: -1rem;
        padding-inline: 1rem;
        flex-wrap: nowrap;
        overflow-x: auto;
        scroll-snap-type: x proximity;
        scrollbar-width: none;
    }

    .hero-badges-row::-webkit-scrollbar {
        display: none;
    }

    .hero-badge-item {
        flex: 0 0 auto;
        scroll-snap-align: start;
        background: rgba(15, 15, 22, 0.54);
    }

    body[data-theme="light"] .hero-badge-item {
        background: rgba(255, 255, 255, 0.82);
    }

    .hero-actions-group {
        display: grid;
        grid-template-columns: 1fr;
        gap: 0.65rem;
    }

    .hero-actions-group a,
    .hero-actions-group button {
        width: 100%;
        min-height: 48px;
        justify-content: center;
    }

    .hero-email-tag {
        align-items: flex-start;
        font-size: 0.82rem;
    }

    .scroll-down-hint {
        display: none;
    }

    section {
        padding-block: var(--section-space);
    }

    .ventures-grid,
    .tracks-grid,
    .skills-grid,
    .projects-grid,
    .materials-grid,
    .achievements-grid,
    .contact-grid,
    .about-stats-grid {
        grid-template-columns: minmax(0, 1fr) !important;
        gap: 1rem;
    }

    .venture-card,
    .track-body,
    .skill-card,
    .project-card,
    .material-card,
    .achievement-card,
    .contact-card {
        padding: 1.25rem;
    }

    .about-photo-wrapper {
        max-width: 420px;
        margin-inline: auto;
    }

    .about-photo-badge {
        left: 0.75rem;
        right: 0.75rem;
        bottom: 0.75rem;
        padding: 0.8rem;
    }

    /* Portfolio */
    .filter-nav-bar {
        top: var(--site-nav-height);
        padding: 0.65rem 0;
    }

    .filter-scroll-container {
        padding-inline: 1rem;
        scroll-padding-inline: 1rem;
        scroll-snap-type: x proximity;
    }

    .filter-pill {
        flex: 0 0 auto;
        scroll-snap-align: start;
        padding-inline: 0.9rem;
    }

    .portfolio-cards-grid {
        margin-block: 1.25rem 0;
        gap: 1rem;
    }

    .domain-media-frame {
        height: auto;
        aspect-ratio: 16 / 10;
    }

    .domain-body {
        padding: 1.25rem;
    }

    .domain-action-footer,
    .doc-actions-row,
    .cv-btn-row {
        align-items: stretch;
        flex-direction: column;
    }

    .domain-action-footer a,
    .domain-action-footer button,
    .doc-actions-row a,
    .doc-actions-row button,
    .cv-btn-row a,
    .cv-btn-row button {
        width: 100%;
        min-height: 46px;
        justify-content: center;
    }

    .photo-gallery-modal {
        padding: max(0.75rem, env(safe-area-inset-top)) 0.75rem max(0.75rem, env(safe-area-inset-bottom));
    }

    .photo-close-btn {
        position: sticky;
        top: 0.25rem;
        margin-left: auto;
        z-index: 2;
    }

    /* Academic & CV */
    .academic-section {
        padding-block: var(--section-space) !important;
    }

    .academic-grid,
    .admission-grid,
    .cv-profile-grid,
    .cv-section-grid {
        gap: 1rem !important;
    }

    .academic-detail-list li {
        overflow-wrap: normal;
        word-break: normal;
    }

    /* Materials */
    .filter-controls-bar {
        margin-block: 1.25rem 0.5rem;
        padding-inline: 1rem;
        align-items: stretch;
    }

    .search-box-wrap {
        width: 100%;
        max-width: none;
        min-width: 0;
    }

    .category-pill-group {
        margin-inline: -1rem;
        padding-inline: 1rem;
        flex-wrap: nowrap;
        overflow-x: auto;
        scroll-snap-type: x proximity;
        scrollbar-width: none;
    }

    .category-pill-group::-webkit-scrollbar {
        display: none;
    }

    .category-tab-btn {
        flex: 0 0 auto;
        scroll-snap-align: start;
    }

    .materials-container {
        gap: 1rem;
    }

    .doc-card {
        padding: 1.25rem;
    }

    .doc-meta-specs {
        align-items: flex-start;
        flex-wrap: wrap;
    }

    .pdf-modal-backdrop {
        padding: max(0.5rem, env(safe-area-inset-top)) 0.5rem max(0.5rem, env(safe-area-inset-bottom));
    }

    .pdf-modal-box {
        height: calc(100dvh - 1rem - env(safe-area-inset-top) - env(safe-area-inset-bottom));
        border-radius: 18px;
    }

    .pdf-modal-header {
        gap: 0.75rem;
        padding: 0.75rem;
    }

    .pdf-modal-title {
        min-width: 0;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    /* Certificate archive */
    .certificates-page .site-nav {
        position: relative;
    }

    .certificate-command-bar {
        min-height: 0;
        padding: 0.7rem 0.75rem;
    }

    .certificate-context {
        gap: 0.65rem;
    }

    .certificates-page .brand-badge {
        width: 40px;
        height: 40px;
        flex-basis: 40px;
        border-radius: 11px;
        font-size: 0.95rem;
    }

    .archive-eyebrow {
        font-size: 0.52rem;
    }

    .certificates-page .brand-title-main {
        max-width: calc(100vw - 6.5rem);
        font-size: 0.94rem;
    }

    .certificates-page .brand-subtitle-meta {
        max-width: calc(100vw - 6.5rem);
        font-size: 0.62rem;
    }

    .certificate-command-controls {
        align-items: stretch;
        flex-direction: column;
        gap: 0.45rem;
    }

    .certificates-page .header-center-controls,
    .certificates-page .header-actions {
        width: 100%;
        min-width: 0;
        justify-content: center;
        overflow: visible;
        padding-bottom: 0;
    }

    .certificates-page .view-btn {
        flex: 1 1 0;
    }

    .certificates-page .btn-action {
        flex: 1 1 auto;
        justify-content: center;
    }

    .certificates-page main.main-viewport {
        padding: 0.75rem;
    }

    .certificates-page .spotlight-container {
        gap: 0.75rem;
        margin-bottom: 0.75rem;
    }

    .certificates-page .stage-center {
        grid-row: 1;
        min-height: clamp(280px, 76vw, 380px);
    }

    .certificates-page .panel-info {
        grid-row: 2;
        padding: 1.15rem;
    }

    .certificates-page .panel-stats {
        grid-row: 3;
        padding: 1.15rem;
    }

    .certificates-page .certificate-frame {
        min-height: clamp(280px, 76vw, 380px);
        border-width: 3px;
    }

    .certificates-page .stage-nav-btn {
        width: 44px;
        height: 44px;
    }

    .certificates-page .stage-toolbar {
        top: 0.65rem;
        right: 0.65rem;
    }

    .certificates-page .stat-rows {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 0.45rem;
    }

    .certificates-page .stat-row {
        min-width: 0;
        justify-content: space-between;
        gap: 0.45rem;
        padding: 0.5rem;
        border: 1px solid var(--glass-border);
        background: var(--subtle-surface);
    }

    .certificates-page .stat-name {
        min-width: 0;
        font-size: 0.65rem;
        letter-spacing: 0.06em;
    }

    .certificates-page .stat-val {
        min-width: auto;
        font-size: 1.05rem;
    }

    .certificates-page .timeline-wheel-wrapper {
        padding: 0.55rem;
        border-radius: 18px;
    }

    .certificates-page .wheel-center-group {
        gap: 0.45rem;
    }

    .certificates-page .wheel-arrow-btn {
        width: 42px;
        height: 42px;
        flex: 0 0 42px;
    }

    .certificates-page .wheel-center-pod {
        min-width: 0;
        margin: 0;
        padding-inline: 0.55rem;
    }

    .certificates-page .wheel-roller-window {
        gap: 0.35rem;
    }

    .certificates-page .wheel-diamond {
        font-size: 0.8rem;
    }

    .certificates-page .wheel-year-display {
        font-size: 1.55rem;
    }

    .certificates-page .filter-toolbar {
        padding: 1rem;
    }

    .certificates-page .search-and-counts,
    .certificates-page .sort-selector-wrapper {
        align-items: stretch;
        flex-direction: column;
    }

    .certificates-page .search-input-wrapper {
        width: 100%;
        min-width: 0;
    }

    .certificates-page .cards-grid {
        grid-template-columns: minmax(0, 1fr);
        gap: 1rem;
    }

    .certificates-page .category-chips {
        margin-inline: -1rem;
        padding-inline: 1rem;
        flex-wrap: nowrap;
        overflow-x: auto;
        scrollbar-width: none;
    }

    .certificates-page .category-chips::-webkit-scrollbar {
        display: none;
    }

    .certificates-page .cat-chip {
        flex: 0 0 auto;
    }
}

@media (max-width: 420px) {
    .nav-inner {
        justify-content: flex-start;
        gap: 0.45rem;
    }

    .brand-logo {
        flex: 1 1 auto;
        overflow: hidden;
    }

    .brand-badge-monochrome {
        width: 36px;
        height: 36px;
        flex-basis: 36px;
    }

    .brand-title-text {
        max-width: 7.25rem;
        font-size: 0.9rem;
    }

    .central-theme-toggle {
        margin-left: 0;
        padding: 0.15rem;
    }

    .theme-pill-btn {
        width: 31px;
    }

    .hamburger-btn {
        width: 39px;
        height: 39px;
        display: inline-flex;
    }

    .hero-student-sub,
    .hero-roles-typed-box {
        max-width: 100%;
        overflow-wrap: anywhere;
    }

    .section-title,
    .page-header .section-title {
        font-size: clamp(1.95rem, 10vw, 2.75rem) !important;
    }

    .certificates-page .header-actions .icon-btn-tool {
        flex: 0 0 42px;
    }

    .certificates-page .stat-rows {
        grid-template-columns: 1fr;
    }
}

/* ---------- Achievement archive: compact mobile composition ---------- */
@media (max-width: 768px) {
    .certificates-page .site-nav {
        position: relative;
        background: transparent;
        border: 0;
        box-shadow: none;
        -webkit-backdrop-filter: none;
        backdrop-filter: none;
    }

    .certificates-page .nav-inner {
        position: fixed;
        z-index: 1302;
        top: max(0.55rem, env(safe-area-inset-top));
        right: 0.7rem;
        width: auto;
        min-height: 0;
        padding: 0.28rem;
        display: flex;
        justify-content: flex-end;
        gap: 0.3rem;
        border: 1px solid var(--glass-border);
        border-radius: 999px;
        background:
            linear-gradient(145deg, var(--strong-surface), transparent 72%),
            var(--nav-surface);
        box-shadow: 0 12px 32px rgba(0, 0, 0, 0.24), var(--glass-inner-sheen);
        -webkit-backdrop-filter: blur(22px) saturate(160%);
        backdrop-filter: blur(22px) saturate(160%);
    }

    .certificates-page .brand-logo {
        display: none;
    }

    .certificates-page .central-theme-toggle {
        margin: 0;
        padding: 0.12rem;
        background: var(--subtle-surface);
    }

    .certificates-page .theme-label {
        display: none;
    }

    .certificates-page .theme-pill-btn {
        width: 34px;
        height: 34px;
        min-height: 34px;
        padding: 0;
    }

    .certificates-page .hamburger-btn {
        width: 38px;
        height: 38px;
        min-height: 38px;
        display: inline-flex;
        border-radius: 999px;
    }

    .certificates-page nav.site-nav .nav-links {
        position: fixed;
        z-index: 1301;
        top: calc(max(0.55rem, env(safe-area-inset-top)) + 3.35rem);
        left: 0.7rem;
        right: 0.7rem;
        width: auto;
        max-height: calc(100dvh - 5rem - env(safe-area-inset-top));
        border-radius: 20px;
    }

    .certificates-page .certificate-command-shell {
        border-top: 0;
        border-bottom: 1px solid var(--glass-border);
        background:
            radial-gradient(circle at 8% 0%, var(--strong-surface), transparent 48%),
            var(--nav-surface);
    }

    .certificates-page .certificate-command-bar {
        padding: 0.65rem 0.7rem 0.7rem;
        gap: 0.55rem;
    }

    .certificates-page .certificate-context {
        min-height: 50px;
        padding-right: 7.9rem;
        gap: 0.55rem;
    }

    .certificates-page .brand-badge {
        width: 38px;
        height: 38px;
        flex-basis: 38px;
        border-radius: 11px;
        font-size: 0.88rem;
    }

    .certificates-page .archive-eyebrow {
        font-size: 0.48rem;
        letter-spacing: 0.13em;
    }

    .certificates-page .brand-title-main {
        max-width: none;
        display: -webkit-box;
        overflow: hidden;
        -webkit-box-orient: vertical;
        -webkit-line-clamp: 2;
        white-space: normal;
        text-overflow: clip;
        font-size: 0.88rem;
        line-height: 1.14;
    }

    .certificates-page .brand-subtitle-meta {
        max-width: none;
        gap: 0.3rem;
        font-size: 0.56rem;
    }

    .certificates-page .brand-subtitle-meta span:first-child {
        min-width: 0;
        text-overflow: ellipsis;
    }

    .certificates-page .certificate-command-controls {
        display: grid;
        grid-template-columns: repeat(7, minmax(0, 1fr));
        align-items: stretch;
        gap: 0.32rem;
    }

    .certificates-page .header-center-controls,
    .certificates-page .header-actions {
        display: contents;
    }

    .certificates-page .view-btn,
    .certificates-page .btn-action,
    .certificates-page .icon-btn-tool,
    .certificates-page .header-actions .icon-btn-tool {
        width: 100%;
        min-width: 0;
        height: 44px;
        min-height: 44px;
        padding: 0;
        flex: none;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 0;
        overflow: hidden;
        border-radius: 13px;
        font-size: 0.95rem;
    }

    .certificates-page .view-btn > span,
    .certificates-page #slideshow-text {
        display: none;
    }

    .certificates-page .mobile-stage-tool {
        display: inline-flex;
    }

    .certificates-page .view-btn.active,
    .certificates-page .header-actions .btn-action.btn-slideshow {
        box-shadow: 0 5px 16px var(--white-glow), var(--glass-inner-sheen);
    }

    .certificates-page main.main-viewport {
        width: 100%;
        padding: 0.65rem;
        display: flex;
        flex-direction: column;
        gap: 0.65rem;
    }

    .certificates-page:not(.gallery-mode) #spotlight-view {
        display: contents !important;
    }

    .certificates-page.gallery-mode #spotlight-view {
        display: none !important;
    }

    .certificates-page .stage-center {
        order: 1;
        width: 100%;
        min-height: clamp(250px, 72vw, 360px);
        border-radius: 20px;
    }

    .certificates-page .certificate-frame {
        min-height: clamp(250px, 72vw, 360px);
        border-width: 2px;
        border-radius: 18px;
    }

    .certificates-page .stage-toolbar {
        display: none;
    }

    .certificates-page .stage-nav-btn {
        width: 42px;
        height: 42px;
        font-size: 1rem;
    }

    .certificates-page .stage-nav-btn.prev {
        left: 0.35rem;
    }

    .certificates-page .stage-nav-btn.next {
        right: 0.35rem;
    }

    .certificates-page .timeline-wheel-wrapper {
        order: 2;
        min-height: 68px;
        margin: 0;
        padding: 0.45rem;
        border-radius: 18px;
    }

    .certificates-page .wheel-track-left,
    .certificates-page .wheel-track-right {
        display: none;
    }

    .certificates-page .wheel-center-group {
        width: 100%;
        padding: 0;
        gap: 0.4rem;
    }

    .certificates-page .wheel-arrow-btn {
        width: 40px;
        height: 40px;
        flex-basis: 40px;
    }

    .certificates-page .wheel-center-pod {
        flex: 1 1 auto;
        min-width: 0;
        margin: 0;
        padding: 0.25rem 0.55rem;
        border-radius: 14px;
    }

    .certificates-page .wheel-roller-window {
        height: 31px;
    }

    .certificates-page .wheel-year-display {
        font-size: 1.4rem;
    }

    .certificates-page .wheel-year-counter {
        font-size: 0.62rem;
    }

    .certificates-page .panel-stats {
        order: 3;
        width: 100%;
        padding: 0.8rem;
        text-align: left;
        border-radius: 18px;
    }

    .certificates-page .panel-stats > div:first-child {
        width: 100%;
    }

    .certificates-page .stats-scope-toggle {
        margin-bottom: 0.55rem;
        border-radius: 10px;
    }

    .certificates-page .scope-btn {
        min-height: 34px;
        padding: 0.35rem 0.2rem;
        font-size: 0.59rem;
    }

    .certificates-page .stat-group-main {
        margin-bottom: 0.55rem;
        padding: 0.2rem 0 0.55rem;
        display: flex;
        align-items: center;
        justify-content: space-between;
    }

    .certificates-page .stat-label-large {
        font-size: 0.72rem;
        letter-spacing: 0.14em;
    }

    .certificates-page .stat-number-huge {
        margin: 0;
        font-size: 2.05rem;
    }

    .certificates-page .stat-rows {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 0.35rem;
    }

    .certificates-page .stat-row {
        min-height: 44px;
        padding: 0.42rem;
        gap: 0.3rem;
        border-radius: 10px;
    }

    .certificates-page .stat-name {
        font-size: 0.56rem;
        letter-spacing: 0.04em;
        line-height: 1.2;
    }

    .certificates-page .stat-val {
        font-size: 0.98rem;
    }

    .certificates-page .panel-stats-footer {
        margin-top: 0.55rem;
        padding-top: 0.5rem;
        font-size: 0.62rem;
        text-align: left;
    }

    .certificates-page .panel-info {
        order: 4;
        width: 100%;
        padding: 0.9rem;
        border-radius: 18px;
    }

    .certificates-page .panel-info-header {
        margin-bottom: 0.7rem;
        padding-bottom: 0.6rem;
    }

    .certificates-page .panel-tag {
        margin-bottom: 0.3rem;
        padding: 3px 7px;
        font-size: 0.6rem;
    }

    .certificates-page .panel-info-title {
        font-size: 1rem;
        line-height: 1.24;
    }

    .certificates-page .meta-list {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 0.65rem 0.75rem;
    }

    .certificates-page .meta-item:nth-child(3),
    .certificates-page .meta-item:nth-child(4) {
        grid-column: 1 / -1;
    }

    .certificates-page .meta-label {
        font-size: 0.61rem;
        letter-spacing: 0.07em;
    }

    .certificates-page .meta-value,
    .certificates-page .meta-value.highlight {
        font-size: 0.78rem;
        line-height: 1.3;
    }

    .certificates-page .panel-info-footer {
        margin-top: 0.75rem;
        padding-top: 0.65rem;
    }

    .certificates-page .btn-drive-link {
        display: none;
    }

    .certificates-page .btn-preview-mode {
        min-height: 40px;
        padding: 0.55rem;
        border-radius: 11px;
        font-size: 0.72rem;
    }

    .certificates-page #gallery-view {
        order: 1;
        width: 100%;
    }
}

@media (hover: none) {
    .page-preview-card:hover,
    .venture-card:hover,
    .track-card:hover,
    .project-card:hover,
    .material-card:hover,
    .achievement-card:hover,
    .domain-card:hover,
    .doc-card:hover,
    .edu-card:hover,
    .pub-card:hover {
        transform: none !important;
    }

    a:active,
    button:active {
        transform: scale(0.985);
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    #constellation-canvas,
    #bg-particles {
        display: none !important;
    }
}