/* ============================================
   Jack Chen | Portfolio — AND2ES Inspired
   Light theme, pill nav, canvas hero
   ============================================ */

/* ----- Reset & Base ----- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --bg: #ffffff;
    --bg-alt: #f5f5f5;
    --surface: #ffffff;
    --surface-hover: #f0f0f0;
    --border: #e0e0e0;
    --border-strong: rgba(0,0,0,0.08);
    --text-primary: #000000;
    --text-secondary: #666666;
    --text-tertiary: #999999;
    --accent: #000000;
    --pill-bg: #000000;
    --pill-hover: #333333;
    --pill-active-bg: #e6e6e6;
    --pill-active-text: #000000;
    --pill-radius: 999px;
    --transition: 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    --modal-bg: rgba(255, 255, 255, 0.92);
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

body.modal-open {
    overflow: hidden;
}

body.preloader-active {
    overflow: hidden;
}

::selection {
    background: rgba(0,0,0,0.12);
    color: #000;
}

/* ----- Scrollbar ----- */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

/* ----- Pill Button ----- */
.pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: #000000;
    color: #FFFFFF;
    padding: 4px 8px;
    font-size: 12px;
    font-weight: 500;
    text-decoration: none;
    border-radius: 2px;
    border: 1px solid #000000;
    transition: all 0.2s ease-in-out;
    cursor: pointer;
    line-height: 1;
}

.pill:hover {
    background-color: #FFFFFF;
    color: #000000;
}

/* ----- Nav ----- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 9001;
    padding: 6px 12px;
    transition: transform var(--transition), opacity var(--transition);
}

.nav-hidden {
    transform: translateY(-100%);
}


.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-left,
.nav-right {
    display: flex;
    align-items: center;
    gap: 8px;
    transition: opacity 0.35s ease, transform 0.35s ease;
}


.nav-item {
    padding: 6px 14px;
    font-size: 12px;
}


.nav-icon-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    font-size: 12px;
    white-space: nowrap;
}

.nav-logo {
    display: inline-flex;
    align-items: center;
    font-weight: 700;
    font-size: 18px;
    color: #000;
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
    text-decoration: none;
    line-height: 1;
}


/* ----- Mobile Bottom Nav ----- */
.mobile-nav {
    display: none;
    position: fixed;
    bottom: 6px;
    left: 6px;
    right: 6px;
    padding: 0;
    gap: 3px;
    z-index: 9000;
}

.mobile-nav-item {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 46px;
    font-size: 10px;
    background: #000;
    color: #fff;
    border: none;
    border-radius: var(--pill-radius);
    text-decoration: none;
    transition: background var(--transition);
    cursor: pointer;
    user-select: none;
}

.mobile-nav-item:hover {
    background: #333;
    color: #fff;
}

.mobile-nav-item.active {
    background: #e6e6e6;
    color: #000;
}

.mobile-nav-item svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.mobile-logo {
    font-weight: 600;
    flex: 0.6;
    padding: 10px 18px;
}

.mobile-wechat-wrap {
    position: relative;
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.wechat-btn-mobile {
    width: 100%;
    height: 46px;
    background: #000;
    color: #fff;
    border: none;
    border-radius: var(--pill-radius);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition);
}

.wechat-btn-mobile:hover {
    background: #333;
}

.mobile-wechat-popup {
    position: fixed;
    bottom: 60px;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    z-index: 9999;
}

/* ----- WeChat Popup ----- */
.wechat-trigger {
    position: relative;
    display: inline-flex;
}

.wechat-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    font-size: 12px;
    cursor: pointer;
    font-family: inherit;
}

.wechat-popup {
    position: absolute;
    top: calc(100% + 12px);
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 12px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.10);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease, transform 0.25s ease;
    z-index: 100;
    min-width: 140px;
    text-align: center;
}

.wechat-trigger:hover .wechat-popup,
.wechat-popup:hover {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
    pointer-events: auto;
}

.wechat-qr {
    width: 120px;
    height: 120px;
    object-fit: contain;
    display: block;
    border-radius: 4px;
}

.wechat-label {
    font-size: 10px;
    color: var(--text-tertiary);
    margin-top: 6px;
}

/* ----- Hero ----- */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    overflow: hidden;
    background: var(--bg);
}

.hero-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
}

.hero-content {
    text-align: center;
    pointer-events: auto;
    max-width: 700px;
    padding: 0 24px;
}

.hero-label {
    font-size: 11px;
    font-weight: 400;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-tertiary);
    margin-bottom: 12px;
}

.hero-name {
    font-size: clamp(48px, 10vw, 100px);
    font-weight: 600;
    letter-spacing: -0.03em;
    line-height: 1;
    margin-bottom: 4px;
}

.hero-sub {
    font-size: clamp(18px, 3vw, 28px);
    font-weight: 300;
    color: var(--text-secondary);
    letter-spacing: -0.01em;
    margin-bottom: 20px;
}

.hero-desc {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 480px;
    margin: 0 auto;
}


.section-tag {
    display: inline-block;
    font-size: 10px;
    font-weight: 500;
    letter-spacing: 0.05em;
    color: var(--text-tertiary);
    margin-bottom: 8px;
}

.section-title {
    font-size: 28px;
    font-weight: 500;
    letter-spacing: -0.01em;
    margin-bottom: 8px;
}

.section-desc {
    font-size: 13px;
    color: var(--text-secondary);
}



/* ----- Grid / Cards ----- */
.grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}

.card {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    cursor: pointer;
    border-radius: 4px;
    background: var(--bg-alt);
}

.card.hidden {
    display: none;
}

.card-media {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.card-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.4s ease;
}

.card:hover .card-media img {
    transform: scale(1.03);
}

.card-play-badge {
    position: absolute;
    bottom: 12px;
    right: 12px;
    z-index: 2;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0.6);
    border-radius: 50%;
    color: #fff;
    backdrop-filter: blur(4px);
}

.card-body {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.5) 0%, transparent 50%);
    opacity: 0;
    transition: opacity var(--transition);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 16px;
    z-index: 1;
}

.card:hover .card-body {
    opacity: 1;
}

.card-tag {
    position: absolute;
    top: 12px;
    left: 12px;
    z-index: 2;
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    font-size: 9px;
    font-weight: 500;
    letter-spacing: 0.03em;
    color: #fff;
    background: rgba(0,0,0,0.65);
    border-radius: var(--pill-radius);
    backdrop-filter: blur(4px);
}

.card-title {
    font-size: 14px;
    font-weight: 500;
    color: #fff;
    margin-bottom: 4px;
    padding: 0 16px 0 16px;
    position: relative;
    z-index: 2;
}

.card-text {
    font-size: 11px;
    color: rgba(255,255,255,0.75);
    padding: 0 16px 16px 16px;
    position: relative;
    z-index: 2;
}

/* ----- Caption ----- */
.caption {
    text-align: center;
    margin-top: 32px;
    font-size: 11px;
    color: var(--text-tertiary);
}

/* ----- About Section ----- */
.about-wrap {
    display: flex;
    justify-content: center;
}

.about-card {
    display: flex;
    gap: 32px;
    max-width: 700px;
    padding: 32px;
    background: var(--surface);
    border: 1px solid var(--border-strong);
    border-radius: 4px;
}

.about-avatar {
    flex-shrink: 0;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #000;
    border-radius: 50%;
}

.about-initials {
    font-size: 24px;
    font-weight: 600;
    color: #fff;
}

.about-body {
    flex: 1;
}

.about-name {
    font-size: 20px;
    font-weight: 500;
    letter-spacing: -0.01em;
    margin-bottom: 4px;
}

.about-name-en {
    font-weight: 300;
    color: var(--text-secondary);
}

.about-role {
    font-size: 12px;
    font-weight: 400;
    color: var(--text-tertiary);
    margin-bottom: 16px;
}

.about-text {
    font-size: 13px;
    font-weight: 300;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 10px;
}

.about-resume-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 4px;
}

/* ----- Footer ----- */
.footer {
    padding: 24px;
    border-top: 1px solid var(--border);
    text-align: center;
}

.footer-text {
    font-size: 11px;
    color: var(--text-tertiary);
}

/* ----- Preloader ----- */
.preloader {
    position: fixed;
    inset: 0;
    z-index: 99999;
    background: var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.4s ease;
}

.preloader.hidden {
    opacity: 0;
    pointer-events: none;
}

.preloader-text {
    font-size: 14px;
    font-weight: 400;
    color: var(--text-secondary);
    letter-spacing: 0.05em;
}

/* ----- Modal ----- */
.modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 10000;
    pointer-events: none;
}

.modal-overlay.open {
    pointer-events: auto;
}

.modal-backdrop {
    position: fixed;
    inset: 0;
    background: var(--modal-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal-overlay.open .modal-backdrop {
    opacity: 1;
}

.modal-container {
    position: fixed;
    inset: 40px;
    z-index: 10001;
    max-width: 960px;
    margin: 0 auto;
    background: var(--surface);
    border-radius: 4px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transform: translateY(20px);
    opacity: 0;
    transition: transform 0.35s ease, opacity 0.35s ease;
    pointer-events: none;
}

.modal-overlay.open .modal-container {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.modal-back-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 13px;
}

.modal-header-tag {
    font-size: 10px;
    font-weight: 500;
    letter-spacing: 0.05em;
    color: var(--text-tertiary);
    text-transform: uppercase;
}

.modal-body {
    flex: 1;
    overflow-y: auto;
}

.detail-hero {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: var(--bg-alt);
}

.detail-hero img,
.detail-hero video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.detail-hero-controls {
    position: absolute;
    bottom: 12px;
    left: 12px;
    display: flex;
    gap: 8px;
}

.detail-hero-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    font-size: 13px;
    font-weight: 500;
    color: #fff;
    background: rgba(0,0,0,0.75);
    border: none;
    border-radius: var(--pill-radius);
    cursor: pointer;
    transition: background var(--transition);
}

.detail-hero-btn:hover {
    background: rgba(0,0,0,0.9);
}

/* ----- Detail Content ----- */
.detail-content {
    padding: 32px;
}

.detail-title {
    font-size: 24px;
    font-weight: 500;
    letter-spacing: -0.01em;
    margin-bottom: 16px;
}

.detail-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 20px;
}

.detail-meta-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 11px;
    color: var(--text-secondary);
}

.detail-intro {
    font-size: 13px;
    line-height: 1.8;
    color: var(--text-secondary);
    white-space: pre-line;
}

/* ----- Fade-in animation ----- */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ----- Responsive ----- */
@media (min-width: 1200px) {
    .section { padding: 100px 24px; }
    .section-title { font-size: 32px; }
}

@media (max-width: 900px) {
    .grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    /* nav-center merged into nav-right */
    .nav-right { display: none; }
    .mobile-nav { display: flex; }
    .hero { min-height: 500px; }
    .hero-name { font-size: clamp(36px, 12vw, 56px); }
    .section { padding: 60px 16px; }
    .section-header { margin-bottom: 28px; }
    .section-title { font-size: 22px; }
    .about-card { flex-direction: column; align-items: center; text-align: center; padding: 24px 20px; }
    
}

@media (max-width: 600px) {
    .grid { grid-template-columns: 1fr; }
    .about-card { flex-direction: column; align-items: center; text-align: center; padding: 24px 20px; }
}

@media (max-width: 480px) {
    .hero-name { font-size: clamp(28px, 14vw, 40px); }
    .card-body { opacity: 1; }
    .card-title { font-size: 13px; }
}

/* ----- Portfolio Subsections ----- */
.portfolio-subsection {
    margin-bottom: 56px;
}
.portfolio-subsection:last-child {
    margin-bottom: 0;
}
.subsection-title {
    font-size: 17px;
    font-weight: 500;
    letter-spacing: -0.01em;
    margin-bottom: 20px;
    color: var(--text-primary);
}