/* ======================================================
   FONTS — loaded via <link> in index.html:
   Fraunces (display serif) · Karla (body/UI) · JetBrains Mono (accents)
   ====================================================== */

/* ======================================================
   VARIABLES
   ====================================================== */
:root {
    /* base */
    --bg:            #0a0b17;
    --bg-soft:       #10112238;

    /* surfaces */
    --surface:       rgba(255, 255, 255, 0.035);
    --surface-strong: rgba(255, 255, 255, 0.06);
    --card:          rgba(20, 21, 38, 0.55);

    /* borders */
    --border:        rgba(255, 255, 255, 0.09);
    --border-bright: rgba(158, 140, 255, 0.4);

    /* type colors */
    --ink:           #ece9fb;
    --ink-soft:      #b6b4d6;
    --muted:         #7d7ba0;

    /* accents */
    --accent:        #9b8bff;
    --accent-2:      #7aa2ff;
    --accent-warm:   #cdb4ff;
    --accent-soft:   rgba(155, 139, 255, 0.14);
    --accent-glow:   rgba(155, 139, 255, 0.32);

    /* misc */
    --radius:        16px;
    --radius-sm:     10px;
    --nav-h:         64px;

    --font-display:  'Fraunces', Georgia, 'Times New Roman', serif;
    --font-body:     'Karla', 'Segoe UI', system-ui, -apple-system, sans-serif;
    --font-mono:     'JetBrains Mono', 'Courier New', monospace;
}

/* ======================================================
   GLOBAL RESET
   ====================================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-h);
}

body {
    background-color: var(--bg);
    background-image:
        radial-gradient(ellipse 900px 700px at 15% -10%, rgba(122, 162, 255, 0.14), transparent 60%),
        radial-gradient(ellipse 900px 700px at 100% 115%, rgba(155, 139, 255, 0.12), transparent 60%);
    background-attachment: fixed;
    color: var(--ink-soft);
    font-family: var(--font-body);
    line-height: 1.7;
    overflow-x: hidden;
    position: relative;
    -webkit-font-smoothing: antialiased;
}

/* Display / heading type */
h1, h2, h3 {
    font-family: var(--font-display);
    color: var(--ink);
}

/* Small structural labels stay in mono for a quiet developer accent */
.nav-brand, .section-tag, .panel-label,
.skill-category h4, .tech, .contact-label,
.link-name, .link-arrow, .proj-counter, footer, .repo-link {
    font-family: var(--font-mono);
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }

::selection {
    background: var(--accent-soft);
    color: var(--ink);
}

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb {
    background: rgba(155, 139, 255, 0.25);
    border-radius: 8px;
}
::-webkit-scrollbar-thumb:hover { background: rgba(155, 139, 255, 0.4); }

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    border-radius: 4px;
}

/* ======================================================
   AMBIENT BACKGROUND — soft drifting light, faint grain
   ====================================================== */
.bg-aurora {
    position: fixed;
    inset: 0;
    z-index: 0;
    overflow: hidden;
    pointer-events: none;
}

.bg-aurora .blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(90px);
    will-change: transform;
}

.bg-aurora .blob-a {
    width: 620px; height: 620px;
    top: -180px; left: -140px;
    background: radial-gradient(circle, var(--accent) 0%, transparent 70%);
    opacity: 0.18;
    animation: drift-a 32s ease-in-out infinite alternate;
}

.bg-aurora .blob-b {
    width: 560px; height: 560px;
    bottom: -160px; right: -120px;
    background: radial-gradient(circle, var(--accent-2) 0%, transparent 70%);
    opacity: 0.14;
    animation: drift-b 28s ease-in-out infinite alternate;
}

.bg-aurora .blob-c {
    width: 480px; height: 480px;
    top: 32%; left: 58%;
    background: radial-gradient(circle, var(--accent-warm) 0%, transparent 70%);
    opacity: 0.09;
    animation: drift-c 36s ease-in-out infinite alternate;
}

/* faint grain for a touch of paper-like texture over the gradients */
body::after {
    content: '';
    position: fixed;
    inset: 0;
    z-index: 850;
    pointer-events: none;
    opacity: 0.035;
    mix-blend-mode: overlay;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* Keep content above the ambient background */
header, main, footer, #navbar {
    position: relative;
    z-index: 1;
}

/* ======================================================
   STICKY NAV
   ====================================================== */
#navbar {
    position: sticky;
    top: 0;
    z-index: 800;
    height: var(--nav-h);
    background: rgba(10, 11, 23, 0.72);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
}

.nav-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 40px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    font-size: 0.95rem;
    font-weight: 500;
    letter-spacing: 2px;
    color: var(--ink);
    display: inline-flex;
    align-items: center;
}

.nav-brand::after {
    content: '';
    width: 6px;
    height: 6px;
    margin-left: 8px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 10px var(--accent-glow);
}

#navbar ul {
    display: flex;
    gap: 2rem;
}

#navbar a {
    font-size: 0.85rem;
    letter-spacing: 0.4px;
    color: var(--muted);
    transition: color 0.25s;
    padding: 4px 0;
    border-bottom: 1px solid transparent;
}

#navbar a:hover,
#navbar a.active {
    color: var(--ink);
    border-bottom-color: var(--accent);
}

/* ======================================================
   HERO HEADER
   ====================================================== */
header {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    overflow: hidden;
    padding: 60px 20px;
}

.header-inner {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.header-inner > * {
    opacity: 0;
    transform: translateY(16px);
    animation: fade-up 0.9s ease forwards;
}

.header-inner > *:nth-child(1) { animation-delay: 0.05s; }
.header-inner > *:nth-child(2) { animation-delay: 0.2s; }
.header-inner > *:nth-child(3) { animation-delay: 0.35s; }
.header-inner > *:nth-child(4) { animation-delay: 0.5s; }

.hero-name {
    font-size: clamp(3rem, 9vw, 5.5rem);
    font-weight: 600;
    letter-spacing: -1px;
    color: var(--ink);
    line-height: 1.05;
}

.header-role {
    font-size: 1.05rem;
    color: var(--accent-2);
    letter-spacing: 0.5px;
}

.header-tagline {
    font-size: 0.98rem;
    color: var(--ink-soft);
    opacity: 0.85;
    max-width: 520px;
    line-height: 1.6;
}

/* Header tags */
.header-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-top: 6px;
}

.tag {
    padding: 6px 16px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--surface);
    color: var(--ink-soft);
    font-size: 0.8rem;
    letter-spacing: 0.3px;
    transition: color 0.25s, border-color 0.25s, background 0.25s;
}

.tag:hover {
    color: var(--ink);
    border-color: var(--border-bright);
    background: var(--accent-soft);
}

/* Scroll hint */
.scroll-hint {
    position: absolute;
    bottom: 36px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: var(--muted);
    font-size: 0.78rem;
    letter-spacing: 1px;
    animation: bounce-down 2.6s ease-in-out infinite;
    z-index: 2;
}

.scroll-arrow {
    font-size: 1.1rem;
    margin-top: 4px;
    color: var(--accent-2);
}

/* ======================================================
   SECTIONS COMMON
   ====================================================== */
.section {
    max-width: 1100px;
    margin: 0 auto;
    padding: 90px 40px;
}

.section.will-animate {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.section.in-view {
    opacity: 1;
    transform: none;
}

/* Section header row */
.section-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 10px;
}

.section-header::after {
    content: '';
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, var(--border), transparent);
}

.section-tag {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-bright);
    color: var(--accent);
    font-size: 0.72rem;
    letter-spacing: 1px;
    padding: 4px 11px;
    border-radius: 999px;
    flex-shrink: 0;
}

.section-header h2 {
    font-size: 1.9rem;
    font-weight: 600;
    color: var(--ink);
    letter-spacing: -0.3px;
    white-space: nowrap;
}

.section-subtitle {
    font-size: 0.95rem;
    color: var(--muted);
    margin-bottom: 40px;
    letter-spacing: 0.2px;
}

.proj-counter {
    color: var(--accent-2);
    font-size: 0.82rem;
    margin-left: 6px;
}

/* ======================================================
   ABOUT
   ====================================================== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 28px;
}

.panel {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--card);
    backdrop-filter: blur(6px);
    padding: 30px 30px 32px;
    transition: border-color 0.35s, box-shadow 0.35s, transform 0.35s;
}

.panel:hover {
    border-color: var(--border-bright);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35), 0 0 30px var(--accent-soft);
    transform: translateY(-2px);
}

.panel-label {
    font-size: 0.72rem;
    letter-spacing: 2.5px;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 18px;
}

.about-text {
    font-size: 0.96rem;
    color: var(--ink-soft);
    line-height: 1.85;
}

/* Focus area list inside profile panel */
.focus-list {
    margin-top: 22px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.focus-list li {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    font-size: 0.88rem;
}

.focus-key {
    color: var(--ink);
    font-weight: 600;
    font-size: 0.78rem;
    letter-spacing: 0.3px;
    min-width: 78px;
    padding-top: 2px;
    flex-shrink: 0;
}

.focus-val {
    color: var(--ink-soft);
    font-size: 0.86rem;
    line-height: 1.65;
}

/* Skills inside panel */
.skills-grid {
    display: flex;
    flex-direction: column;
    gap: 22px;
}

.skill-category h4 {
    font-size: 0.7rem;
    color: var(--accent);
    letter-spacing: 2px;
    margin-bottom: 10px;
    text-transform: uppercase;
}

.skill-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.chip {
    padding: 5px 13px;
    border: 1px solid var(--border);
    border-radius: 999px;
    color: var(--ink-soft);
    font-size: 0.8rem;
    letter-spacing: 0.2px;
    transition: background 0.25s, border-color 0.25s, color 0.25s;
    cursor: default;
}

.chip:hover {
    background: var(--accent-soft);
    border-color: var(--border-bright);
    color: var(--ink);
}

.chip.ai {
    border-color: rgba(122, 162, 255, 0.3);
    color: #a8c4ff;
}

.chip.db {
    border-color: rgba(205, 180, 255, 0.3);
    color: #d3bfff;
}

/* ======================================================
   EXPERIENCE
   ====================================================== */
.experience-card {
    padding: 34px 34px 36px;
}

.experience-head {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 22px;
}

.company-badge {
    flex-shrink: 0;
    width: 46px;
    height: 46px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #fff;
    padding: 5px;
    overflow: hidden;
    box-shadow: 0 8px 20px rgba(238, 77, 45, 0.25);
}

.company-badge img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    border-radius: 6px;
}

.experience-heading h3 {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 4px;
}

.experience-meta {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--muted);
    letter-spacing: 0.3px;
}

.experience-gallery {
    margin-top: 26px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.experience-gallery img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    display: block;
    transition: transform 0.4s, border-color 0.3s;
}

.experience-gallery img:hover {
    transform: scale(1.015);
    border-color: var(--border-bright);
}

/* ======================================================
   PROJECTS
   ====================================================== */
.projects-carousel {
    display: flex;
    align-items: stretch;
    gap: 14px;
}

.projects-track {
    display: flex;
    gap: 28px;
    flex: 1;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scroll-behavior: smooth;
    padding: 6px 4px 14px;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.projects-track::-webkit-scrollbar { display: none; }

.projects-track .project-card {
    flex: 0 0 100%;
    scroll-snap-align: start;
}

/* Side navigation arrows */
.proj-nav {
    flex-shrink: 0;
    width: 44px;
    align-self: center;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface);
    color: var(--ink-soft);
    font-size: 17px;
    transition: background 0.25s, border-color 0.25s, color 0.25s, transform 0.15s, opacity 0.25s;
}

.proj-nav:hover {
    background: var(--accent-soft);
    border-color: var(--border-bright);
    color: var(--ink);
}

.proj-nav:active { transform: scale(0.94); }

.proj-nav:disabled {
    opacity: 0.25;
    cursor: default;
}

/* Dot pager below the carousel */
.proj-dots-bar {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 26px;
}

.proj-dots-bar .pdot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--surface-strong);
    border: 1px solid var(--border);
    cursor: pointer;
    transition: background 0.25s, transform 0.25s;
}

.proj-dots-bar .pdot.active {
    background: var(--accent);
    box-shadow: 0 0 10px var(--accent-glow);
    transform: scale(1.25);
}

.project-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    position: relative;
    transition: border-color 0.35s, box-shadow 0.35s;
    transform-style: flat;
    will-change: transform;
    --mx: 50%;
    --my: 50%;
}

/* Mouse-following soft glow (driven by JS CSS vars) */
.project-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(
        circle at var(--mx) var(--my),
        rgba(155, 139, 255, 0.10),
        transparent 55%
    );
    opacity: 0;
    transition: opacity 0.4s;
    pointer-events: none;
    z-index: 1;
}

.project-card:hover {
    border-color: var(--border-bright);
    box-shadow: 0 24px 50px rgba(0, 0, 0, 0.4), 0 0 30px var(--accent-soft);
}

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

/* Project image container */
.project-image-container {
    position: relative;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    background: #05060d;
}

.image-wrapper {
    position: relative;
    width: 100%;
    height: 100%;
}

.image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    background: #05060d;
    display: none;
}

.image-wrapper img.active {
    display: block;
}

/* Overlay — bottom gradient strip, appears on image hover */
.overlay {
    position: absolute;
    bottom: 0; left: 0; right: 0;
    padding: 28px 18px 16px;
    background: linear-gradient(transparent, rgba(5, 6, 15, 0.92));
    color: var(--ink-soft);
    font-size: 0.82rem;
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
    z-index: 2;
}

.image-wrapper:hover .overlay {
    opacity: 1;
}

/* Arrows */
.arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    border: 1px solid var(--border);
    background: rgba(10, 11, 23, 0.75);
    color: var(--ink);
    font-size: 14px;
    z-index: 3;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s, transform 0.25s, border-color 0.25s;
}

.arrow.left  { left: 10px; }
.arrow.right { right: 10px; }

.project-card:hover .arrow {
    opacity: 1;
    pointer-events: auto;
}

.arrow:hover {
    transform: translateY(-50%) scale(1.08);
    border-color: var(--border-bright);
}

.arrow:active {
    transform: translateY(-50%) scale(0.93);
}

/* Dots */
.dots {
    position: absolute;
    bottom: 10px;
    width: 100%;
    display: flex;
    justify-content: center;
    gap: 8px;
    z-index: 3;
}

.dot {
    width: 7px; height: 7px;
    background: rgba(255, 255, 255, 0.25);
    border: 1px solid var(--border);
    border-radius: 50%;
    cursor: pointer;
    transition: background 0.25s, transform 0.25s;
}

.dot.active {
    background: var(--accent);
    box-shadow: 0 0 8px var(--accent-glow);
    transform: scale(1.3);
}

/* Project info footer */
.project-info {
    padding: 18px 20px 22px;
    position: relative;
    z-index: 2;
}

.project-info h3 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--ink);
    letter-spacing: 0.1px;
    margin-bottom: 14px;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
}

.tech {
    padding: 3px 10px;
    border: 1px solid var(--border);
    border-radius: 999px;
    color: var(--muted);
    font-size: 0.72rem;
    letter-spacing: 0.3px;
}

/* "View source" repo link on each card */
.repo-link {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    margin-top: 16px;
    font-size: 0.78rem;
    letter-spacing: 0.2px;
    color: var(--muted);
    transition: color 0.25s, transform 0.25s;
}

.repo-link svg {
    width: 16px;
    height: 16px;
}

.repo-link:hover {
    color: var(--accent-2);
    transform: translateX(3px);
}

/* ======================================================
   LINKS / ACCOUNTS
   ====================================================== */
.link-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 18px;
    margin-top: 10px;
}

.link-card {
    display: flex;
    align-items: center;
    gap: 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--card);
    padding: 20px 22px;
    transition: border-color 0.3s, box-shadow 0.3s, transform 0.25s, background 0.3s;
}

button.link-card {
    width: 100%;
    text-align: left;
    font: inherit;
    color: inherit;
    cursor: pointer;
}

.link-card.copied {
    border-color: var(--border-bright);
    background: var(--accent-soft);
}

.link-card.copied .link-handle {
    color: var(--accent);
}

.link-card:hover {
    border-color: var(--border-bright);
    background: var(--surface-strong);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3), 0 0 24px var(--accent-soft);
    transform: translateY(-3px);
}

.link-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border);
    border-radius: 50%;
    color: var(--ink-soft);
    transition: color 0.3s, border-color 0.3s;
}

.link-icon svg {
    width: 20px;
    height: 20px;
}

.link-card:hover .link-icon {
    color: var(--accent);
    border-color: var(--border-bright);
}

.link-meta {
    display: flex;
    flex-direction: column;
    gap: 3px;
    flex: 1;
    min-width: 0;
}

.link-name {
    font-size: 0.95rem;
    color: var(--ink);
    letter-spacing: 0.2px;
}

.link-handle {
    font-family: var(--font-body);
    font-size: 0.8rem;
    color: var(--muted);
    letter-spacing: 0.2px;
}

.link-arrow {
    color: var(--muted);
    font-size: 0.85rem;
    opacity: 0.7;
    transition: opacity 0.25s, transform 0.25s, color 0.25s;
}

.link-card:hover .link-arrow {
    opacity: 1;
    transform: translateX(3px);
    color: var(--accent-2);
}

/* ======================================================
   CONTACT
   ====================================================== */
.contact-cards {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 10px;
}

.contact-card {
    display: flex;
    flex-direction: column;
    gap: 8px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--card);
    padding: 24px 30px;
    min-width: 260px;
    transition: border-color 0.3s, box-shadow 0.3s, transform 0.25s;
}

.contact-card:hover {
    border-color: var(--border-bright);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3), 0 0 24px var(--accent-soft);
    transform: translateY(-3px);
}

.contact-label {
    font-size: 0.7rem;
    color: var(--accent);
    letter-spacing: 1.5px;
    text-transform: uppercase;
}

.contact-value {
    font-family: var(--font-body);
    font-size: 0.98rem;
    color: var(--ink);
    letter-spacing: 0.2px;
}

/* ======================================================
   FOOTER
   ====================================================== */
footer {
    text-align: center;
    padding: 32px 20px;
    border-top: 1px solid var(--border);
    color: var(--muted);
    font-size: 0.78rem;
    letter-spacing: 0.5px;
    margin-top: 60px;
}

/* ======================================================
   SCROLL PROGRESS BAR
   ====================================================== */
#scroll-progress {
    position: fixed;
    top: 0; left: 0;
    height: 2px;
    width: 0%;
    background: linear-gradient(90deg, var(--accent-2), var(--accent));
    box-shadow: 0 0 10px var(--accent-glow);
    z-index: 1000;
    transition: width 0.1s linear;
}

/* ======================================================
   BACK TO TOP
   ====================================================== */
#back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(20, 21, 38, 0.85);
    backdrop-filter: blur(8px);
    border: 1px solid var(--border-bright);
    color: var(--accent);
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 20px var(--accent-soft);
    opacity: 0;
    transform: translateY(10px);
    pointer-events: none;
    transition: opacity 0.3s, transform 0.3s, box-shadow 0.25s;
    z-index: 799;
}

#back-to-top.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

#back-to-top:hover {
    box-shadow: 0 0 28px var(--accent-glow);
    transform: translateY(-3px);
}

/* ======================================================
   KEYFRAME ANIMATIONS
   ====================================================== */
@keyframes fade-up {
    from { opacity: 0; transform: translateY(16px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes bounce-down {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50%       { transform: translateX(-50%) translateY(9px); }
}

@keyframes drift-a {
    0%   { transform: translate(0, 0); }
    100% { transform: translate(60px, 40px); }
}

@keyframes drift-b {
    0%   { transform: translate(0, 0); }
    100% { transform: translate(-50px, -30px); }
}

@keyframes drift-c {
    0%   { transform: translate(0, 0) scale(1); }
    100% { transform: translate(-40px, 50px) scale(1.08); }
}

@media (prefers-reduced-motion: reduce) {
    .bg-aurora .blob,
    .scroll-hint,
    .header-inner > * {
        animation: none !important;
    }
    .header-inner > * { opacity: 1; transform: none; }
    html { scroll-behavior: auto; }
}

/* ======================================================
   RESPONSIVE
   ====================================================== */
@media (max-width: 768px) {
    .about-grid {
        grid-template-columns: 1fr;
    }

    .experience-gallery {
        grid-template-columns: 1fr;
    }

    .nav-inner {
        padding: 0 20px;
    }

    #navbar ul {
        gap: 1.2rem;
    }

    #navbar a {
        font-size: 0.78rem;
    }
}

@media (max-width: 540px) {
    .section {
        padding: 64px 20px;
    }

    .contact-card {
        min-width: 100%;
    }

    .nav-brand {
        display: none;
    }
}