/* ================================================
   Owen Wang — Shared Styles
   ================================================ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

/* ---- LIGHT THEME (Pale Parchment) ---- */
:root, [data-theme="light"] {
    --bg: #F3F0E4;
    --bg-warm: #F9F7EF;
    --bg-illustration: #EBE7DA;
    --text: #302A1E;
    --text-mid: #6F6550;
    --text-dim: #968C78;
    --accent: #C47832;
    --accent-hover: #A86428;
    --accent-dot: #D4883E;
    --accent-subtle: rgba(196, 120, 50, 0.1);
    --border: #DDD8CA;
    --border-light: #EBE7DA;
    --toggle-bg: var(--bg-warm);
    --toggle-icon: var(--text-dim);
}

/* ---- DARK THEME (Ocean Abyss) ---- */
[data-theme="dark"] {
    --bg: #0E1620;
    --bg-warm: #152030;
    --bg-illustration: #1A2838;
    --text: #D8E0EA;
    --text-mid: #8A9BB0;
    --text-dim: #5E7088;
    --accent: #D4923A;
    --accent-hover: #E4A24A;
    --accent-dot: #D4923A;
    --accent-subtle: rgba(212, 146, 58, 0.12);
    --border: #253040;
    --border-light: #1E2A38;
    --toggle-bg: var(--bg-warm);
    --toggle-icon: var(--text-dim);
}

body {
    background-color: var(--bg);
    color: var(--text);
    font-family: 'DM Sans', system-ui, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    transition: background-color 0.3s ease, color 0.3s ease;
}

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

/* ---- NAV ---- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    transition: background-color 0.4s ease, box-shadow 0.4s ease;
}
.nav.scrolled {
    background-color: var(--bg);
    opacity: 0.96;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 var(--border);
}
.nav-inner {
    max-width: 960px;
    margin: 0 auto;
    padding: 1.25rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.nav-home {
    font-family: 'Cormorant Garamond', Georgia, serif;
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text);
    text-decoration: none;
    letter-spacing: -0.01em;
}
.nav-right {
    display: flex;
    align-items: center;
    gap: 1.75rem;
}
.nav-links {
    display: flex;
    align-items: center;
    gap: 0;
}
.nav-link-wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0 1rem;
}
.nav-dot {
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: transparent;
    margin-bottom: 0.4rem;
    transition: background-color 0.3s ease;
}
.nav-link-wrap.active .nav-dot {
    background: var(--accent-dot);
}
.nav-link-wrap a {
    font-family: 'DM Sans', system-ui, sans-serif;
    font-size: 0.82rem;
    font-weight: 500;
    letter-spacing: 0.06em;
    color: var(--text-dim);
    text-decoration: none;
    transition: color 0.3s ease;
}
.nav-link-wrap a:hover {
    color: var(--accent);
}
.nav-link-wrap.active a {
    color: var(--text);
}

/* ---- THEME TOGGLE ---- */
.theme-toggle {
    background: var(--toggle-bg);
    border: 1px solid var(--border);
    border-radius: 50%;
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: border-color 0.3s ease, background-color 0.3s ease;
    flex-shrink: 0;
}
.theme-toggle:hover {
    border-color: var(--accent);
}
.theme-toggle svg {
    width: 16px;
    height: 16px;
    color: var(--toggle-icon);
    transition: color 0.3s ease;
}
.theme-toggle:hover svg {
    color: var(--accent);
}
.theme-toggle .icon-sun,
.theme-toggle .icon-moon { display: none; }
[data-theme="light"] .theme-toggle .icon-moon { display: block; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }

/* ---- FOOTER ---- */
.footer {
    max-width: 960px;
    margin: 0 auto;
    padding: 3rem 1.5rem 4rem;
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.footer-text {
    font-size: 0.78rem;
    color: var(--text-dim);
}
.social-links {
    display: flex;
    align-items: center;
    gap: 1.25rem;
}
.social-link {
    color: var(--text-dim);
    transition: color 0.3s ease, transform 0.3s ease;
    display: inline-flex;
}
.social-link:hover {
    color: var(--accent);
    transform: translateY(-2px);
}
.social-link svg {
    width: 1.1rem;
    height: 1.1rem;
}

/* ---- SECTION HELPERS ---- */
.section-divider {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 1.5rem;
}
.section-divider hr {
    border: none;
    border-top: 1px solid var(--border);
}
.section-label {
    font-family: 'DM Sans', system-ui, sans-serif;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--text-dim);
    margin-bottom: 1.5rem;
}

/* ---- SHARED LINKS ---- */
.about-link, .more-link {
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--accent);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    transition: gap 0.3s ease, color 0.3s ease;
}
.about-link:hover, .more-link:hover {
    color: var(--accent-hover);
    gap: 0.6rem;
}
.more-link {
    margin-top: 1.75rem;
    font-size: 0.88rem;
    gap: 0.4rem;
}
.more-link:hover { gap: 0.7rem; }

/* ---- ANIMATIONS ---- */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(18px); }
    to { opacity: 1; transform: translateY(0); }
}
.fade-in {
    opacity: 0;
    animation: fadeUp 1s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}
.fade-in-d1 { animation-delay: 0.15s; }
.fade-in-d2 { animation-delay: 0.3s; }
.fade-in-d3 { animation-delay: 0.5s; }
.fade-in-d4 { animation-delay: 0.7s; }
.fade-in-d5 { animation-delay: 0.9s; }
.fade-in-d6 { animation-delay: 1.1s; }

/* ---- PILL (shared tag style) ---- */
.pill {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    border-radius: 3px;
    font-size: 0.65rem;
    font-weight: 500;
    letter-spacing: 0.04em;
    color: var(--accent);
    background: var(--accent-subtle);
    transition: background 0.2s ease;
}

/* ---- REVEAL ANIMATION ---- */
.reveal {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
                transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

@keyframes surfaceGently {
    from { opacity: 0; transform: translateY(14px); }
    to { opacity: 1; transform: translateY(0); }
}
.enter {
    opacity: 0;
    animation: surfaceGently 1s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}
.enter-d1 { animation-delay: 0.1s; }
.enter-d2 { animation-delay: 0.25s; }

/* ---- RESPONSIVE (shared) ---- */
@media (max-width: 640px) {
    .footer { flex-direction: column; gap: 1.5rem; text-align: center; }
    .nav-link-wrap { padding: 0 0.6rem; }
    .nav-right { gap: 1rem; }
}

/* ---- SCROLLBAR ---- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-dim); }