/* =============================================
   Saahisht � Student Portfolio
   Futuristic � Energetic � Dark Neon
   Gundecha Education Academy � Mumbai � ISC
   ============================================= */

:root {
    --color-bg:          #0a0e1a;
    --color-bg-alt:      #111827;
    --color-surface:     #1a2235;
    --color-surface-2:   #1e293b;
    --color-border:      rgba(99, 102, 241, 0.15);
    --color-text:        #f1f5f9;
    --color-muted:       #94a3b8;
    --color-accent:      #6366f1;
    --color-accent-2:    #06b6d4;
    --color-warm:        #f97316;
    --color-warm-light:  #fbbf24;
    --gradient-main:     linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #06b6d4 100%);
    --gradient-warm:     linear-gradient(135deg, #f97316, #fbbf24);
    --gradient-text:     linear-gradient(135deg, #818cf8, #06b6d4, #fbbf24);
    --glow-indigo:       0 0 40px rgba(99, 102, 241, 0.25);
    --glow-cyan:         0 0 30px rgba(6, 182, 212, 0.2);
    --font-body:         'Outfit', system-ui, sans-serif;
    --font-display:      'Plus Jakarta Sans', system-ui, sans-serif;
    --radius-sm:         8px;
    --radius-md:         16px;
    --radius-lg:         24px;
    --radius-full:       9999px;
    --shadow-card:       0 4px 24px rgba(0, 0, 0, 0.3);
    --shadow-lg:         0 12px 48px rgba(0, 0, 0, 0.45);
    --nav-height:        72px;
    --nav-height-mobile: 64px;
    --transition:        0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --container-padding: clamp(16px, 4vw, 24px);
}

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--nav-height) + 16px);
}

body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body.nav-open {
    overflow: hidden;
    touch-action: none;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    display: block;
}

.container {
    width: 100%;
    max-width: 1140px;
    margin: 0 auto;
    padding-left: max(var(--container-padding), env(safe-area-inset-left, 0px));
    padding-right: max(var(--container-padding), env(safe-area-inset-right, 0px));
}

.text-gradient {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    border-radius: var(--radius-full);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition);
    min-height: 48px;
    text-align: center;
}

.btn-primary {
    background: var(--gradient-main);
    color: #fff;
    box-shadow: var(--glow-indigo);
}

.btn-primary:hover,
.btn-primary:focus-visible {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(99, 102, 241, 0.45);
    outline: none;
}

.btn-outline {
    background: transparent;
    color: var(--color-text);
    border-color: var(--color-border);
}

.btn-outline:hover,
.btn-outline:focus-visible {
    border-color: var(--color-accent-2);
    color: var(--color-accent-2);
    outline: none;
}

/* =============================================
   NAVIGATION
   ============================================= */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--nav-height);
    background: rgba(10, 14, 26, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--color-border);
    transition: var(--transition);
    padding-left: env(safe-area-inset-left, 0px);
    padding-right: env(safe-area-inset-right, 0px);
}

.site-header.scrolled {
    box-shadow: var(--shadow-card);
    background: rgba(10, 14, 26, 0.95);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: 1140px;
    margin: 0 auto;
    padding-left: max(var(--container-padding), env(safe-area-inset-left, 0px));
    padding-right: max(var(--container-padding), env(safe-area-inset-right, 0px));
    gap: 12px;
}

.nav-logo {
    display: flex;
    align-items: center;
    flex-shrink: 1;
    min-width: 0;
}

.site-logo-img {
    display: block;
    width: auto;
    height: auto;
    object-fit: contain;
    object-position: center;
    flex-shrink: 0;
    transition: var(--transition);
}

.site-logo-img-nav {
    height: clamp(46px, 11vw, 58px);
    max-width: min(150px, 38vw);
}

.site-logo-img-footer {
    height: clamp(56px, 14vw, 76px);
    max-width: min(170px, 45vw);
}

.nav-logo:hover .site-logo-img,
.nav-logo:focus-visible .site-logo-img {
    transform: scale(1.03);
    outline: none;
}

.site-logo-mark {
    display: block;
    width: 40px;
    height: 40px;
    flex-shrink: 0;
    transition: var(--transition);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2px;
    list-style: none;
}

.nav-link {
    display: block;
    padding: 8px 16px;
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-muted);
    transition: var(--transition);
    position: relative;
}

.nav-link:hover,
.nav-link:focus-visible {
    color: var(--color-text);
    outline: none;
}

.nav-link.active {
    color: var(--color-accent-2);
    font-weight: 600;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 4px;
    background: var(--color-warm);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--color-warm);
}

.nav-link-cta {
    background: var(--gradient-main) !important;
    color: #fff !important;
    padding: 8px 20px !important;
    margin-left: 8px;
}

.nav-link-cta::after {
    display: none !important;
}

.nav-link-cta:hover,
.nav-link-cta:focus-visible {
    box-shadow: var(--glow-indigo);
    transform: translateY(-1px);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    min-width: 44px;
    min-height: 44px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    padding: 8px;
    flex-shrink: 0;
    -webkit-tap-highlight-color: transparent;
}

.nav-toggle-bar {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: var(--transition);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
    opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* =============================================
   HERO
   ============================================= */
.hero-profile {
    position: relative;
    padding: calc(var(--nav-height) + 48px) 0 56px;
    overflow: hidden;
}

.hero-profile-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
    background:
        radial-gradient(ellipse 80% 60% at 20% 20%, rgba(99, 102, 241, 0.12) 0%, transparent 60%),
        radial-gradient(ellipse 60% 50% at 80% 80%, rgba(6, 182, 212, 0.08) 0%, transparent 55%),
        radial-gradient(ellipse 40% 40% at 60% 30%, rgba(249, 115, 22, 0.06) 0%, transparent 50%);
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(99, 102, 241, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(99, 102, 241, 0.04) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 70% 70% at 50% 40%, black 20%, transparent 70%);
}

.hero-profile-shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
}

.hero-profile-shape-1 {
    width: 500px;
    height: 500px;
    background: rgba(99, 102, 241, 0.15);
    top: -120px;
    right: -100px;
}

.hero-profile-shape-2 {
    width: 350px;
    height: 350px;
    background: rgba(6, 182, 212, 0.12);
    bottom: -60px;
    left: -80px;
}

.hero-profile-shape-3 {
    width: 200px;
    height: 200px;
    background: rgba(249, 115, 22, 0.1);
    top: 40%;
    left: 50%;
}

.hero-profile-inner {
    position: relative;
    z-index: 1;
}

.hero-profile-grid {
    display: grid;
    grid-template-columns: 1fr minmax(0, 340px);
    gap: clamp(32px, 5vw, 64px);
    align-items: center;
    background: rgba(26, 34, 53, 0.6);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: clamp(28px, 4vw, 48px);
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.hero-banner-content {
    min-width: 0;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(99, 102, 241, 0.12);
    border: 1px solid rgba(99, 102, 241, 0.3);
    color: var(--color-accent-2);
    padding: 6px 16px;
    border-radius: var(--radius-full);
    font-size: clamp(0.72rem, 2.5vw, 0.82rem);
    font-weight: 500;
    margin-bottom: 20px;
    max-width: 100%;
    flex-wrap: wrap;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: #22c55e;
    border-radius: 50%;
    flex-shrink: 0;
    box-shadow: 0 0 8px rgba(34, 197, 94, 0.6);
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50%      { opacity: 0.5; }
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4.5vw, 3.2rem);
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
    color: var(--color-text);
}

.hero-subtitle {
    font-size: clamp(0.95rem, 2.5vw, 1.05rem);
    color: var(--color-muted);
    max-width: 520px;
    margin-bottom: 28px;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
}

/* Profile photo � 4:5 aspect ratio */
.hero-photo-frame {
    margin: 0;
    width: 100%;
    min-width: 0;
    max-width: 100%;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 16px;
    position: relative;
}

.hero-photo-glow {
    position: absolute;
    inset: -20px;
    background: var(--gradient-main);
    border-radius: var(--radius-lg);
    opacity: 0.2;
    filter: blur(30px);
    z-index: 0;
}

.hero-photo-wrap {
    position: relative;
    width: 100%;
    max-width: 100%;
    padding: 3px;
    background: var(--gradient-main);
    border-radius: var(--radius-lg);
    box-shadow: var(--glow-indigo);
    z-index: 1;
}

.hero-photo-inner {
    width: 100%;
    aspect-ratio: 4 / 5;
    overflow: hidden;
    border-radius: calc(var(--radius-lg) - 3px);
    background: transparent;
    display: flex;
    align-items: flex-end;
    justify-content: center;
}

.hero-profile-photo {
    width: 100%;
    height: 100%;
    max-width: 100%;
    object-fit: contain;
    object-position: center bottom;
    display: block;
}

.hero-photo-caption {
    text-align: center;
    width: 100%;
    position: relative;
    z-index: 1;
}

.card-college {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 2px;
}

.card-location {
    color: var(--color-muted);
    font-size: 0.88rem;
}

.hero-stats-bar {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 24px;
}

.hero-stats-bar .stat-item {
    background: rgba(26, 34, 53, 0.7);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 20px 24px;
    text-align: center;
    box-shadow: var(--shadow-card);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transition: var(--transition);
}

.hero-stats-bar .stat-item:hover {
    border-color: rgba(6, 182, 212, 0.3);
    box-shadow: var(--glow-cyan);
}

.stat-number {
    display: block;
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-warm-light);
    margin-bottom: 2px;
}

.stat-label {
    font-size: 0.72rem;
    color: var(--color-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 600;
}

/* =============================================
   SECTION SHOWCASE BANNERS
   ============================================= */
.section-showcase {
    width: 100%;
    max-width: 1140px;
    margin: 0 auto 40px;
    padding: 0 max(var(--container-padding), env(safe-area-inset-left, 0px));
    padding-right: max(var(--container-padding), env(safe-area-inset-right, 0px));
}

.section-showcase picture {
    display: block;
    width: 100%;
}

.section-showcase-img {
    width: 100%;
    height: auto;
    aspect-ratio: 10 / 3;
    object-fit: cover;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    display: block;
}

/* =============================================
   UI ICONS (SVG sprite)
   ============================================= */
.ui-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: var(--color-accent-2);
}

.ui-icon svg {
    width: 100%;
    height: 100%;
    fill: none;
    stroke: currentColor;
}

.ui-icon-sm {
    width: 28px;
    height: 28px;
}

.ui-icon-md {
    width: 36px;
    height: 36px;
    margin-bottom: 12px;
}

.ui-icon-lg {
    width: 48px;
    height: 48px;
    margin: 0 auto 14px;
    display: flex;
    padding: 10px;
    background: rgba(99, 102, 241, 0.1);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(99, 102, 241, 0.2);
}

.subject-card-featured .ui-icon-md {
    margin-bottom: 0;
    flex-shrink: 0;
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.25);
    color: #fff;
}

.achievement-item .ui-icon-sm {
    margin-top: 2px;
    padding: 6px;
    background: rgba(99, 102, 241, 0.1);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(99, 102, 241, 0.2);
}

.contact-link-icon {
    background: var(--color-bg-alt) !important;
}

/* =============================================
   SECTIONS
   ============================================= */
.section {
    padding: 72px 0;
    position: relative;
}

.section-header {
    margin-bottom: 48px;
}

.section-header-center {
    text-align: center;
}

.section-header-center .section-desc {
    margin: 10px auto 0;
    max-width: 520px;
}

.section-tag {
    display: inline-block;
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--color-accent-2);
    margin-bottom: 10px;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.65rem, 3vw, 2.25rem);
    font-weight: 700;
    letter-spacing: -0.01em;
    line-height: 1.25;
}

.section-desc {
    color: var(--color-muted);
    font-size: 1rem;
    margin-top: 8px;
}

/* --- About --- */
.about-preview {
    background: var(--color-bg-alt);
}

.about-body {
    max-width: 680px;
    margin: 0 auto 40px;
    text-align: center;
}

.about-body p {
    color: var(--color-muted);
    font-size: 1rem;
    line-height: 1.75;
    margin-bottom: 18px;
}

.about-body p:last-child {
    margin-bottom: 0;
}

.about-body strong {
    color: var(--color-text);
}

.interests-block {
    margin-top: 48px;
    text-align: center;
}

.interests-title {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.interests-list {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    padding: 0;
}

.interests-list .tag {
    background: rgba(99, 102, 241, 0.12);
    color: var(--color-accent-2);
    padding: 8px 16px;
    border-radius: var(--radius-full);
    font-size: 0.82rem;
    font-weight: 600;
    border: 1px solid rgba(99, 102, 241, 0.25);
    transition: var(--transition);
}

.interests-list .tag:hover {
    border-color: rgba(6, 182, 212, 0.4);
    box-shadow: var(--glow-cyan);
}

.about-cards-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.info-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 28px 24px;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow-card);
}

.info-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(99, 102, 241, 0.35);
}

.info-icon {
    font-size: 2rem;
    margin-bottom: 12px;
}

.info-card h3 {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 8px;
    letter-spacing: normal;
}

.info-card p {
    color: var(--color-muted);
    font-size: 0.9rem;
    line-height: 1.55;
}

/* --- Academics --- */
.subjects-bento {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.subject-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 28px 20px;
    transition: var(--transition);
    box-shadow: var(--shadow-card);
}

.subject-card-featured {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 20px;
    background: var(--gradient-main);
    color: #fff;
    border: none;
}

.subject-card p {
    color: var(--color-muted);
    font-size: 0.85rem;
    line-height: 1.5;
}

.subject-card-featured h3,
.subject-card-featured p {
    color: #ffffff;
}

.subject-card-featured p {
    color: rgba(255, 255, 255, 0.92);
}

.subject-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(6, 182, 212, 0.3);
}

.subject-icon {
    display: block;
    margin-bottom: 12px;
}

.subject-card h3 {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 6px;
}

.education-timeline {
    margin-top: 48px;
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
}

.timeline-item {
    display: flex;
    gap: 20px;
    padding-bottom: 32px;
    position: relative;
}

.timeline-item:not(:last-child)::before {
    content: '';
    position: absolute;
    left: 7px;
    top: 20px;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--color-accent), transparent);
}

.timeline-marker {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--gradient-main);
    flex-shrink: 0;
    margin-top: 4px;
    box-shadow: var(--glow-indigo);
}

.timeline-marker-past {
    background: var(--color-surface-2);
    border: 2px solid var(--color-accent);
    box-shadow: none;
}

.timeline-content h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.timeline-meta {
    color: var(--color-accent-2);
    font-size: 0.82rem;
    font-weight: 600;
    margin-bottom: 6px;
}

.timeline-content p:last-child {
    color: var(--color-muted);
    font-size: 0.9rem;
    line-height: 1.55;
}

.academics-note {
    margin-top: 32px;
    text-align: center;
    color: var(--color-muted);
    font-size: 1rem;
    line-height: 1.75;
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
}

/* --- Activities --- */
.activities-preview {
    background: var(--color-bg-alt);
}

.activities-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.activities-grid-four {
    grid-template-columns: repeat(4, 1fr);
}

.activity-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 32px 28px;
    box-shadow: var(--shadow-card);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.activity-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--gradient-warm);
    opacity: 0;
    transition: var(--transition);
}

.activity-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(249, 115, 22, 0.3);
}

.activity-card:hover::before {
    opacity: 1;
}

.activity-card-num {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-warm-light);
    line-height: 1;
    margin-bottom: 12px;
    display: block;
}

.activity-card h3 {
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.activity-card p {
    color: var(--color-muted);
    font-size: 0.9rem;
    line-height: 1.55;
}

/* --- Highlights --- */
.highlights-preview {
    background: var(--color-bg);
}

.highlights-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 28px;
    align-items: start;
}

.highlights-subtitle {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--color-text);
}

.achievements-block,
.skills-block {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 32px;
    box-shadow: var(--shadow-card);
}

.achievements-list {
    list-style: none;
    display: flex;
    flex-direction: column;
}

.achievement-item {
    display: flex;
    gap: 16px;
    padding: 18px 0;
    border-bottom: 1px solid var(--color-border);
}

.achievement-item:first-child {
    padding-top: 0;
}

.achievement-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.achievement-icon {
    flex-shrink: 0;
}

.achievement-item strong {
    display: block;
    font-size: 0.95rem;
    margin-bottom: 4px;
}

.achievement-item p {
    color: var(--color-muted);
    font-size: 0.88rem;
    line-height: 1.5;
}

.skills-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 24px;
}

.skill-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.skill-name {
    font-size: 0.9rem;
    font-weight: 600;
}

.skill-level {
    font-size: 0.75rem;
    color: var(--color-accent-2);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.skill-bar {
    height: 8px;
    background: var(--color-bg-alt);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.skill-fill {
    display: block;
    height: 100%;
    width: 0;
    min-width: 0;
    background: var(--gradient-main);
    border-radius: var(--radius-full);
    transition: width 0.8s ease;
}

.learning-tags {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    padding-top: 20px;
    border-top: 1px solid var(--color-border);
}

.learning-label {
    font-size: 0.82rem;
    color: var(--color-muted);
    font-weight: 500;
    margin-right: 4px;
}

.highlights-preview .tag {
    background: rgba(99, 102, 241, 0.12);
    color: var(--color-accent-2);
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: 0.78rem;
    font-weight: 600;
    border: 1px solid rgba(99, 102, 241, 0.25);
}

/* --- Looking Ahead --- */
.looking-ahead-preview {
    background: var(--color-bg-alt);
}

.looking-ahead-body {
    max-width: 780px;
    margin: 0 auto;
    text-align: center;
}

.looking-ahead-body p {
    color: var(--color-muted);
    font-size: 1.05rem;
    line-height: 1.8;
    margin-bottom: 18px;
}

.looking-ahead-body strong {
    color: var(--color-text);
}

.looking-ahead-closing {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-accent-2) !important;
    margin-top: 8px;
}

/* --- Contact --- */
.contact-preview {
    background: var(--color-bg);
}

.contact-split {
    display: block;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-border);
    max-width: 640px;
    margin: 0 auto;
}

.contact-split-content {
    padding: 48px 40px;
    text-align: center;
}

.contact-split-content p {
    color: var(--color-muted);
    margin: 14px auto 28px;
    max-width: 400px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.contact-link {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    color: var(--color-muted);
    font-size: clamp(0.85rem, 2.5vw, 0.95rem);
    transition: var(--transition);
    max-width: 100%;
    word-break: break-word;
}

a.contact-link {
    cursor: pointer;
}

a.contact-link:hover,
a.contact-link:focus-visible {
    color: var(--color-accent-2);
    outline: none;
}

.contact-link-icon {
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-alt);
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    flex-shrink: 0;
}

/* =============================================
   FOOTER
   ============================================= */
.site-footer {
    border-top: 1px solid var(--color-border);
    padding: 36px 0;
    padding-bottom: max(36px, env(safe-area-inset-bottom, 0px));
    background: var(--color-bg-alt);
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
}

.footer-brand p {
    color: var(--color-muted);
    font-size: 0.85rem;
    line-height: 1.6;
}

.footer-domain {
    color: var(--color-accent-2);
    font-weight: 500;
    transition: var(--transition);
}

.footer-domain:hover,
.footer-domain:focus-visible {
    color: var(--color-accent);
    outline: none;
}

.footer-logo {
    align-items: flex-start;
}

.footer-nav {
    display: flex;
    gap: 24px;
}

.footer-nav a {
    color: var(--color-muted);
    font-size: 0.85rem;
    font-weight: 500;
    transition: var(--transition);
}

.footer-nav a:hover,
.footer-nav a:focus-visible {
    color: var(--color-accent-2);
    outline: none;
}

/* --- Scroll reveal --- */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 900px) {
    .about-cards-row {
        grid-template-columns: 1fr;
        max-width: 420px;
        margin-left: auto;
        margin-right: auto;
    }

    .activities-grid-four {
        grid-template-columns: 1fr;
        max-width: 480px;
        margin-left: auto;
        margin-right: auto;
    }

    .subjects-bento {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 1024px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(10, 14, 26, 0.98);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        flex-direction: column;
        align-items: stretch;
        padding: 16px max(var(--container-padding), env(safe-area-inset-right, 0px)) 24px max(var(--container-padding), env(safe-area-inset-left, 0px));
        gap: 4px;
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-12px);
        opacity: 0;
        pointer-events: none;
        transition: opacity var(--transition), transform var(--transition);
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        z-index: 999;
    }

    .nav-menu.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }

    .nav-link {
        padding: 14px 16px;
        min-height: 48px;
        display: flex;
        align-items: center;
    }

    .nav-link-cta {
        margin-left: 0 !important;
        justify-content: center;
        margin-top: 8px;
    }

    .hero-profile-grid {
        grid-template-columns: 1fr;
        gap: 36px;
        padding: 36px;
    }

    .hero-photo-frame {
        order: 1;
        width: 100%;
        max-width: min(100%, 320px);
        margin: 0 auto;
    }

    .hero-banner-content {
        order: 2;
        text-align: center;
    }

    .hero-badge {
        justify-content: center;
    }

    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-actions {
        justify-content: center;
    }

    .section-showcase {
        margin-bottom: 32px;
    }

    .subjects-bento {
        grid-template-columns: 1fr;
    }

    .subject-card-featured {
        grid-column: 1 / -1;
        flex-direction: column;
        align-items: flex-start;
    }

    .subject-card-featured .ui-icon-md {
        margin-bottom: 12px;
    }

    .activities-grid-four {
        grid-template-columns: 1fr;
    }

    .highlights-grid {
        grid-template-columns: 1fr;
    }

    .contact-split-content {
        padding: 40px 32px;
    }
}

@media (max-width: 768px) {
    :root {
        --nav-height: var(--nav-height-mobile);
    }

    .section {
        padding: 72px 0;
    }

    .section-header {
        margin-bottom: 36px;
    }

    .about-cards-row {
        grid-template-columns: 1fr;
    }

    .subject-card-featured {
        grid-column: 1 / -1;
    }

    .activities-grid,
    .activities-grid-four {
        grid-template-columns: 1fr;
    }

    .about-body p {
        font-size: 1rem;
    }

    .achievements-block,
    .skills-block {
        padding: 24px 20px;
    }

    .activity-card {
        padding: 24px 20px;
    }

    .hero-profile {
        padding: calc(var(--nav-height) + 32px) 0 40px;
    }

    .hero-profile-grid {
        padding: 28px 24px;
        border-radius: var(--radius-md);
    }

    .hero-photo-frame {
        max-width: min(100%, 280px);
    }

    .hero-stats-bar {
        grid-template-columns: repeat(3, 1fr);
        gap: 10px;
    }

    .hero-stats-bar .stat-item {
        padding: 16px 12px;
    }

    .stat-number {
        font-size: 1.35rem;
    }

    .footer-inner {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .footer-brand {
        align-items: center;
    }

    .footer-nav {
        flex-wrap: wrap;
        justify-content: center;
        gap: 16px 24px;
    }
}

@media (max-width: 480px) {
    .site-logo-img-nav {
        height: clamp(40px, 12vw, 46px);
        max-width: min(130px, 42vw);
    }

    .site-logo-img-footer {
        height: clamp(48px, 14vw, 56px);
        max-width: min(140px, 48vw);
    }

    .section-showcase {
        margin-bottom: 24px;
        padding-left: max(12px, env(safe-area-inset-left, 0px));
        padding-right: max(12px, env(safe-area-inset-right, 0px));
    }

    .section-showcase-img {
        border-radius: var(--radius-md);
        aspect-ratio: 16 / 9;
    }

    .about-cards-row {
        gap: 14px;
    }

    .info-card {
        padding: 22px 18px;
    }

    .ui-icon-lg {
        width: 42px;
        height: 42px;
        padding: 8px;
    }

    .hero-profile {
        padding: calc(var(--nav-height) + 24px) 0 32px;
    }

    .hero-profile-grid {
        padding: 24px 18px;
        gap: 28px;
    }

    .hero-photo-frame {
        max-width: 100%;
    }

    .hero-title {
        font-size: clamp(1.85rem, 8vw, 2.4rem);
    }

    .hero-actions {
        flex-direction: column;
        width: 100%;
    }

    .hero-actions .btn {
        width: 100%;
    }

    .hero-stats-bar {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .subjects-bento {
        grid-template-columns: 1fr;
    }

    .info-card {
        padding: 22px 18px;
    }

    .contact-split-content {
        padding: 28px 20px;
    }

    .achievement-item {
        gap: 12px;
    }

    .skill-header {
        flex-wrap: wrap;
        gap: 4px;
    }

    .learning-tags {
        justify-content: center;
    }
}

@media (max-width: 360px) {
    .site-logo-img-nav {
        height: 38px;
        max-width: min(115px, 44vw);
    }

    .site-logo-img-footer {
        height: 46px;
        max-width: min(125px, 48vw);
    }

    .hero-badge {
        padding: 6px 12px;
    }

    .btn {
        padding: 12px 20px;
        font-size: 0.88rem;
    }

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

@media (max-height: 500px) and (orientation: landscape) {
    .hero-profile {
        padding: calc(var(--nav-height) + 16px) 0 24px;
    }

    .hero-profile-grid {
        grid-template-columns: 1fr minmax(0, 200px);
        gap: 24px;
        padding: 20px;
    }

    .hero-photo-frame {
        order: 0;
        max-width: 100%;
    }

    .hero-banner-content {
        order: 0;
        text-align: left;
    }

    .nav-menu {
        padding-bottom: max(24px, env(safe-area-inset-bottom, 0px));
    }
}

@media (min-width: 1400px) {
    .container,
    .nav-container {
        max-width: 1200px;
    }
}

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

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

    .reveal {
        opacity: 1;
        transform: none;
    }

    .badge-dot {
        animation: none;
    }
}