/* ========================================
   ZHUJI DESIGN — Premium Interior Studio
   ======================================== */

/* --- Variables --- */
:root {
    --ink: #0d0d0d;
    --ink-light: #1a1a1a;
    --charcoal: #2a2a2a;
    --ash: #666;
    --mist: #999;
    --cloud: #e8e4df;
    --cream: #f7f4ef;
    --paper: #fcfaf7;
    --white: #fff;

    --brass: #c8a45c;
    --brass-light: #e0c88e;
    --brass-dark: #a07830;
    --copper: #b87333;
    --wine: #722f37;

    --font-sans: 'Noto Sans SC', -apple-system, sans-serif;
    --font-serif: 'Noto Serif SC', Georgia, serif;

    --radius: 2px;
    --radius-lg: 4px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
    --shadow: 0 4px 20px rgba(0,0,0,0.06);
    --shadow-lg: 0 20px 60px rgba(0,0,0,0.08);

    --ease-out: cubic-bezier(0.22, 0.61, 0.36, 1);
    --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
}

/* --- Reset --- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; -webkit-font-smoothing: antialiased; }
body {
    font-family: var(--font-sans);
    color: var(--ink);
    background: var(--paper);
    line-height: 1.6;
    overflow-x: hidden;
}

/* --- Typography --- */
.section-tag {
    font-family: var(--font-sans);
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    color: var(--brass);
    text-transform: uppercase;
    display: block;
    margin-bottom: 16px;
}
.section-title {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--ink);
    line-height: 1.2;
    margin-bottom: 12px;
    letter-spacing: -0.02em;
}
.section-desc {
    color: var(--ash);
    font-size: 1rem;
    font-weight: 300;
    max-width: 480px;
}
.section-header {
    text-align: center;
    margin-bottom: 64px;
}
.section-header .section-desc { margin: 0 auto; }

/* --- Header --- */
.header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    padding: 0 48px;
    transition: all 0.4s var(--ease-out);
    mix-blend-mode: difference;
}
.header.scrolled {
    background: rgba(13,13,13,0.92);
    backdrop-filter: blur(20px);
    mix-blend-mode: normal;
    border-bottom: 1px solid rgba(255,255,255,0.06);
}
.header-inner {
    max-width: 1400px; margin: 0 auto;
    display: flex; justify-content: space-between; align-items: center;
    height: 80px;
}
.brand {
    font-family: var(--font-serif);
    font-size: 1.4rem; font-weight: 700;
    color: var(--white); text-decoration: none;
    letter-spacing: 0.05em;
}
.brand-dot { color: var(--brass); }
.header.scrolled .brand { color: var(--white); }
.nav { display: flex; align-items: center; gap: 40px; }
.nav a {
    font-size: 0.8rem; font-weight: 400; letter-spacing: 0.08em;
    color: rgba(255,255,255,0.7); text-decoration: none;
    text-transform: uppercase;
    transition: color 0.3s;
    position: relative;
}
.nav a::after {
    content: ''; position: absolute; bottom: -4px; left: 0;
    width: 0; height: 1px; background: var(--brass);
    transition: width 0.3s var(--ease-out);
}
.nav a:hover { color: var(--white); }
.nav a:hover::after { width: 100%; }
.nav-cta {
    border: 1px solid rgba(255,255,255,0.3) !important;
    padding: 8px 20px !important;
    transition: all 0.3s !important;
}
.nav-cta:hover {
    border-color: var(--brass) !important;
    background: var(--brass) !important;
    color: var(--ink) !important;
}
.nav-cta::after { display: none !important; }

.menu-trigger {
    display: none; flex-direction: column; gap: 5px;
    background: none; border: none; cursor: pointer; padding: 4px;
}
.menu-trigger span {
    display: block; width: 24px; height: 1px;
    background: var(--white); transition: all 0.3s;
}

/* --- Hero --- */
.hero {
    position: relative; min-height: 100vh;
    display: flex; align-items: center; justify-content: center;
    background: var(--ink);
    overflow: hidden;
}
.hero-bg {
    position: absolute; inset: 0;
    background:
        radial-gradient(ellipse 80% 60% at 30% 40%, rgba(200,164,92,0.08) 0%, transparent 60%),
        radial-gradient(ellipse 60% 50% at 70% 60%, rgba(114,47,55,0.06) 0%, transparent 60%),
        radial-gradient(ellipse 50% 40% at 50% 20%, rgba(255,255,255,0.03) 0%, transparent 50%);
}
.hero-bg::before {
    content: ''; position: absolute; inset: 0;
    background:
        linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(0deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 80px 80px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}
.hero-content {
    position: relative; z-index: 2; text-align: center;
    padding: 0 24px; max-width: 900px;
}
.hero-eyebrow {
    font-size: 0.7rem; letter-spacing: 0.35em;
    color: var(--brass); margin-bottom: 32px;
    font-weight: 400; opacity: 0;
    animation: fadeUp 0.8s var(--ease-out) 0.2s forwards;
}
.hero-headline {
    font-family: var(--font-serif);
    font-size: clamp(3rem, 7vw, 5.5rem);
    font-weight: 900; color: var(--white);
    line-height: 1.1; letter-spacing: -0.03em;
    margin-bottom: 28px;
    opacity: 0;
    animation: fadeUp 0.8s var(--ease-out) 0.4s forwards;
}
.hero-accent {
    color: var(--brass);
    font-style: italic;
    position: relative;
}
.hero-desc {
    font-size: 1.05rem; color: rgba(255,255,255,0.5);
    font-weight: 300; line-height: 1.8;
    margin-bottom: 48px;
    opacity: 0;
    animation: fadeUp 0.8s var(--ease-out) 0.6s forwards;
}
.hero-actions {
    display: flex; gap: 20px; justify-content: center; flex-wrap: wrap;
    opacity: 0;
    animation: fadeUp 0.8s var(--ease-out) 0.8s forwards;
}
.hero-scroll {
    position: absolute; bottom: 40px; left: 50%; transform: translateX(-50%);
    display: flex; flex-direction: column; align-items: center; gap: 12px;
    opacity: 0.5;
}
.hero-scroll span {
    font-size: 0.6rem; letter-spacing: 0.3em; color: rgba(255,255,255,0.4);
}
.scroll-line {
    width: 1px; height: 48px;
    background: linear-gradient(to bottom, rgba(255,255,255,0.3), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; transform: scaleY(0.8); transform-origin: top; }
    50% { opacity: 1; transform: scaleY(1); transform-origin: top; }
}

/* --- Buttons --- */
.btn-primary {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 16px 36px;
    background: var(--brass);
    color: var(--ink);
    font-size: 0.85rem; font-weight: 500;
    letter-spacing: 0.04em;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all 0.3s var(--ease-out);
    font-family: var(--font-sans);
}
.btn-primary:hover {
    background: var(--brass-light);
    transform: translateY(-1px);
    box-shadow: 0 8px 30px rgba(200,164,92,0.3);
}
.btn-ghost {
    display: inline-flex; align-items: center;
    padding: 16px 36px;
    background: transparent;
    color: rgba(255,255,255,0.7);
    font-size: 0.85rem; font-weight: 400;
    letter-spacing: 0.04em;
    text-decoration: none;
    border: 1px solid rgba(255,255,255,0.2);
    cursor: pointer;
    transition: all 0.3s var(--ease-out);
    font-family: var(--font-sans);
}
.btn-ghost:hover {
    border-color: rgba(255,255,255,0.5);
    color: var(--white);
}
.btn-block { width: 100%; justify-content: center; font-size: 0.9rem; }

/* --- Work Section --- */
.work {
    padding: 120px 48px;
    max-width: 1400px; margin: 0 auto;
}
.work-filter {
    display: flex; justify-content: center; gap: 32px;
    margin-bottom: 56px; flex-wrap: wrap;
}
.filter-btn {
    background: none; border: none;
    font-size: 0.8rem; letter-spacing: 0.08em;
    color: var(--mist); cursor: pointer;
    padding: 4px 0;
    transition: color 0.3s;
    font-family: var(--font-sans);
    position: relative;
}
.filter-btn::after {
    content: ''; position: absolute; bottom: 0; left: 0;
    width: 0; height: 1px; background: var(--brass);
    transition: width 0.3s var(--ease-out);
}
.filter-btn.active { color: var(--ink); }
.filter-btn.active::after { width: 100%; }
.filter-btn:hover { color: var(--ink); }

.work-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-auto-rows: auto;
    gap: 2px;
}
.work-card { cursor: pointer; }
.work-card-large { grid-column: span 2; }

.work-card-image {
    position: relative;
    height: 400px;
    overflow: hidden;
}
.work-card-large .work-card-image { height: 400px; }

.work-card-bg {
    position: absolute; inset: 0;
    transition: transform 0.6s var(--ease-out);
}
.work-card:hover .work-card-bg { transform: scale(1.03); }
.work-card-pattern {
    position: absolute; inset: 0;
    background:
        linear-gradient(45deg, rgba(255,255,255,0.02) 25%, transparent 25%),
        linear-gradient(-45deg, rgba(255,255,255,0.02) 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, rgba(255,255,255,0.02) 75%),
        linear-gradient(-45deg, transparent 75%, rgba(255,255,255,0.02) 75%);
    background-size: 4px 4px; background-position: 0 0, 0 2px, 2px -2px, -2px 0;
    opacity: 0.3;
}

.work-card-overlay {
    position: absolute; bottom: 0; left: 0; right: 0;
    padding: 20px;
    background: linear-gradient(to top, rgba(0,0,0,0.4), transparent);
    display: flex; justify-content: space-between; align-items: flex-end;
}
.work-card-category {
    font-size: 0.7rem; letter-spacing: 0.12em;
    color: var(--white); text-transform: uppercase;
    background: rgba(0,0,0,0.4);
    padding: 4px 12px; backdrop-filter: blur(8px);
}
.work-card-area {
    font-size: 0.75rem; color: rgba(255,255,255,0.8);
    font-weight: 300;
}
.work-card-body {
    padding: 20px 0;
    display: flex; justify-content: space-between; align-items: baseline;
    flex-wrap: wrap;
}
.work-card-body h3 {
    font-family: var(--font-serif);
    font-size: 1.1rem; font-weight: 600;
    color: var(--ink);
}
.work-card-body p {
    font-size: 0.8rem; color: var(--ash);
}
.work-card-location {
    width: 100%; font-size: 0.75rem; color: var(--mist);
    margin-top: 4px;
}

/* --- About --- */
.about {
    padding: 120px 48px;
    background: var(--cream);
}
.about-grid {
    max-width: 1400px; margin: 0 auto;
    display: grid; grid-template-columns: 1fr 1fr; gap: 80px;
    align-items: center;
}
.about-text .section-title { max-width: 500px; }
.about-text em {
    font-style: italic; color: var(--brass);
    position: relative;
}
.about-stats {
    display: flex; gap: 60px; margin: 40px 0 48px;
}
.about-stat-num {
    font-family: var(--font-serif);
    font-size: 3rem; font-weight: 900; color: var(--ink);
    line-height: 1; display: block;
}
.about-stat-label {
    font-size: 0.75rem; color: var(--ash);
    letter-spacing: 0.06em; margin-top: 8px; display: block;
}
.about-features {
    display: grid; grid-template-columns: 1fr 1fr; gap: 20px;
}
.about-feature {
    display: flex; gap: 14px; align-items: flex-start;
}
.feature-icon { color: var(--brass); font-size: 1rem; margin-top: 2px; }
.about-feature h4 { font-size: 0.9rem; font-weight: 600; margin-bottom: 2px; }
.about-feature p { font-size: 0.8rem; color: var(--ash); }
.about-visual-box {
    background: var(--ink);
    aspect-ratio: 3/4;
    position: relative;
    overflow: hidden;
    max-width: 480px;
    margin-left: auto;
}
.about-visual-inner {
    position: absolute; inset: 20px;
    border: 1px solid rgba(255,255,255,0.1);
    background:
        linear-gradient(135deg, rgba(200,164,92,0.15), transparent 50%),
        linear-gradient(225deg, rgba(114,47,55,0.1), transparent 50%);
}

/* --- Services --- */
.services {
    padding: 120px 48px;
    max-width: 1400px; margin: 0 auto;
}
.services-grid {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
    background: var(--cloud);
    border: 1px solid var(--cloud);
}
.service-card {
    background: var(--paper);
    padding: 48px 32px;
    transition: background 0.3s;
}
.service-card:hover { background: var(--white); }
.service-num {
    font-family: var(--font-serif);
    font-size: 2.5rem; font-weight: 900;
    color: var(--cloud); line-height: 1; display: block; margin-bottom: 16px;
    transition: color 0.3s;
}
.service-card:hover .service-num { color: var(--brass-light); }
.service-card h3 {
    font-family: var(--font-serif);
    font-size: 1.1rem; font-weight: 600; margin-bottom: 8px;
}
.service-card > p {
    font-size: 0.8rem; color: var(--ash); margin-bottom: 20px;
    line-height: 1.6;
}
.service-list {
    list-style: none;
}
.service-list li {
    font-size: 0.78rem; color: var(--ash);
    padding: 6px 0; border-bottom: 1px solid var(--cloud);
    position: relative; padding-left: 14px;
}
.service-list li::before {
    content: '—'; position: absolute; left: 0; color: var(--cloud);
}

/* --- Quote --- */
.quote {
    padding: 120px 48px;
    background: var(--ink);
    color: var(--white);
}
.quote .section-tag { color: var(--brass-light); }
.quote-container {
    max-width: 1100px; margin: 0 auto;
    display: grid; grid-template-columns: 1fr 1fr; gap: 80px;
    align-items: center;
}
.quote-info h2 {
    font-family: var(--font-serif);
    font-size: clamp(1.8rem, 3vw, 2.4rem);
    font-weight: 700; margin-bottom: 16px;
    color: var(--white);
}
.quote-info > p {
    color: rgba(255,255,255,0.5); font-size: 0.95rem;
    line-height: 1.7; font-weight: 300; margin-bottom: 32px;
}
.quote-trust {
    display: flex; flex-direction: column; gap: 10px;
}
.quote-trust span {
    font-size: 0.82rem; color: rgba(255,255,255,0.6);
}
.quote-form-wrap {
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08);
    padding: 48px;
}
.quote-form { display: flex; flex-direction: column; gap: 24px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-row-triple { grid-template-columns: 1fr 1fr 1fr; }
.form-field { display: flex; flex-direction: column; gap: 6px; }
.form-field label {
    font-size: 0.7rem; letter-spacing: 0.12em;
    color: rgba(255,255,255,0.4); text-transform: uppercase;
}
.form-field input, .form-field select {
    padding: 14px 0;
    background: transparent;
    border: none;
    border-bottom: 1px solid rgba(255,255,255,0.15);
    color: var(--white);
    font-size: 0.9rem;
    font-family: var(--font-sans);
    transition: border-color 0.3s;
    outline: none;
    border-radius: 0;
    -webkit-appearance: none;
}
.form-field input:focus, .form-field select:focus {
    border-bottom-color: var(--brass);
}
.form-field select {
    cursor: pointer;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath fill='%23999' d='M6 8L0 0h12z'/%3E%3C/svg%3E") no-repeat right center;
}
.form-field input::placeholder { color: rgba(255,255,255,0.25); }
.form-range {
    display: flex; align-items: center; gap: 20px;
}
.form-range input[type="range"] {
    flex: 1; -webkit-appearance: none; height: 1px;
    background: rgba(255,255,255,0.15); outline: none;
}
.form-range input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none; width: 12px; height: 12px;
    background: var(--brass); cursor: pointer;
    border-radius: 0;
}
.range-value {
    font-size: 1.2rem; font-weight: 600; color: var(--brass);
    min-width: 60px; text-align: right;
}

/* --- Testimonials --- */
.testimonials {
    padding: 120px 48px;
    max-width: 1400px; margin: 0 auto;
    overflow: hidden;
}
.testimonial-track {
    display: flex; gap: 32px;
    overflow-x: auto; scroll-snap-type: x mandatory;
    padding-bottom: 20px;
    -ms-overflow-style: none; scrollbar-width: none;
}
.testimonial-track::-webkit-scrollbar { display: none; }
.testimonial-card {
    min-width: 380px; scroll-snap-align: start;
    background: var(--white);
    border: 1px solid var(--cloud);
    padding: 40px;
    flex-shrink: 0;
}
.testimonial-text {
    font-family: var(--font-serif);
    font-size: 1rem; line-height: 1.8; color: var(--charcoal);
    margin-bottom: 24px;
    position: relative;
}
.testimonial-text::before {
    content: '"'; font-size: 4rem; color: var(--cloud);
    position: absolute; top: -20px; left: -8px;
    font-family: var(--font-serif); line-height: 1;
}
.testimonial-author strong {
    display: block; font-size: 0.85rem; color: var(--ink);
}
.testimonial-author span {
    font-size: 0.75rem; color: var(--mist);
}

/* --- Contact --- */
.contact {
    padding: 120px 48px;
    background: var(--cream);
    text-align: center;
}
.contact-inner { max-width: 700px; margin: 0 auto; }
.contact-inner h2 {
    font-family: var(--font-serif);
    font-size: clamp(1.8rem, 3vw, 2.4rem);
    font-weight: 700; margin-bottom: 12px;
}
.contact-inner > p {
    color: var(--ash); font-size: 0.95rem; margin-bottom: 40px;
    font-weight: 300;
}
.contact-form-row {
    display: flex; gap: 8px;
    background: var(--white);
    border: 1px solid var(--cloud);
    padding: 6px;
}
.contact-form-row input {
    flex: 1; min-width: 0;
    padding: 14px 16px; border: none; outline: none;
    font-size: 0.85rem; font-family: var(--font-sans);
    background: transparent;
}
.contact-form-row input::placeholder { color: var(--mist); }
.contact-form-row .btn-primary {
    padding: 14px 32px; white-space: nowrap; font-size: 0.85rem;
}
.contact-phone {
    margin-top: 20px; font-size: 0.8rem; color: var(--mist);
}

/* --- Footer --- */
.footer {
    background: var(--ink);
    color: rgba(255,255,255,0.5);
    padding: 80px 48px 32px;
}
.footer-inner {
    max-width: 1400px; margin: 0 auto;
    display: flex; justify-content: space-between;
    margin-bottom: 48px; flex-wrap: wrap; gap: 48px;
}
.footer-brand h3 {
    font-family: var(--font-serif); font-size: 1.3rem; color: var(--white);
    margin-bottom: 4px;
}
.footer-brand p { font-size: 0.8rem; }
.footer-links { display: flex; gap: 80px; }
.footer-col h4 {
    font-size: 0.7rem; letter-spacing: 0.15em;
    color: rgba(255,255,255,0.3); text-transform: uppercase;
    margin-bottom: 16px;
}
.footer-col a {
    display: block; font-size: 0.82rem; color: rgba(255,255,255,0.5);
    text-decoration: none; margin-bottom: 8px; transition: color 0.3s;
}
.footer-col a:hover { color: var(--brass); }
.footer-bottom {
    max-width: 1400px; margin: 0 auto; padding-top: 24px;
    border-top: 1px solid rgba(255,255,255,0.06);
    font-size: 0.75rem;
}

/* --- Animations --- */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s var(--ease-out);
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 1200px) {
    .services-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 1024px) {
    .work-grid { grid-template-columns: 1fr 1fr; }
    .about-grid { grid-template-columns: 1fr; gap: 48px; }
    .about-visual-box { max-width: 100%; aspect-ratio: 16/9; }
    .quote-container { grid-template-columns: 1fr; gap: 40px; }
}
@media (max-width: 768px) {
    .header { padding: 0 20px; }
    .nav { display: none; }
    .menu-trigger { display: flex; }
    .nav.open {
        display: flex; flex-direction: column;
        position: absolute; top: 80px; left: 0; right: 0;
        background: rgba(13,13,13,0.98); padding: 32px; gap: 24px;
    }
    .work, .about, .services, .quote, .testimonials, .contact {
        padding: 80px 20px;
    }
    .work-grid { grid-template-columns: 1fr; }
    .work-card-large { grid-column: span 1; }
    .services-grid { grid-template-columns: 1fr; }
    .form-row, .form-row-triple { grid-template-columns: 1fr; }
    .about-stats { gap: 32px; }
    .contact-form-row { flex-direction: column; }
    .testimonial-card { min-width: 280px; }
    .hero-headline { font-size: 2.2rem; }
}