/* ═══════════════════════════════════════════════════════════════
   BLANKZON — Official Site
   Design System: Apple-inspired / Clean Bright Minimalist
   Archetype: #63 Fashion Lookbook
   Effects: Scroll Reveal + Parallax
   ═══════════════════════════════════════════════════════════════ */

/* ─── Design Tokens (Apple DESIGN.md) ─── */
:root {
    /* Brand */
    --color-primary: #0066cc;
    --color-primary-hover: #0055b3;
    --color-primary-focus: #0071e3;
    --color-primary-soft: rgba(0, 102, 204, 0.08);
    --color-primary-on-dark: #2997ff;

    /* Surfaces */
    --color-canvas: #ffffff;
    --color-parchment: #f5f5f7;
    --color-surface-pearl: #fafafc;

    /* Text */
    --color-ink: #1d1d1f;
    --color-ink-secondary: #424245;
    --color-ink-muted: #86868b;

    /* Borders */
    --color-hairline: rgba(0, 0, 0, 0.08);
    --color-hairline-input: rgba(0, 0, 0, 0.12);

    /* Shadows */
    --shadow-card: 0 1px 3px rgba(0, 55, 112, 0.06);
    --shadow-card-hover: 0 8px 24px rgba(0, 55, 112, 0.08), 0 2px 6px rgba(0, 55, 112, 0.04);
    --shadow-product: rgba(0, 0, 0, 0.22) 3px 5px 30px 0;

    /* Typography */
    --font-display: 'Outfit', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;

    /* Spacing */
    --space-xs: 8px;
    --space-sm: 12px;
    --space-md: 17px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-xxl: 48px;
    --space-section: 80px;

    /* Radius */
    --radius-xs: 5px;
    --radius-sm: 8px;
    --radius-md: 11px;
    --radius-lg: 18px;
    --radius-pill: 9999px;

    /* Layout */
    --max-width: 1200px;
    --nav-height: 56px;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-body);
    font-size: 17px;
    font-weight: 400;
    line-height: 1.47;
    letter-spacing: -0.374px;
    color: var(--color-ink);
    background: var(--color-canvas);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

::selection {
    background: var(--color-primary);
    color: #ffffff;
}

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

button {
    font: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

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

.container {
    width: min(calc(100% - 48px), var(--max-width));
    margin: 0 auto;
}

/* ─── Typography ─── */
.eyebrow {
    display: inline-block;
    margin-bottom: var(--space-lg);
    font-family: var(--font-display);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-primary);
}

h1, h2, h3 {
    font-family: var(--font-display);
    color: var(--color-ink);
}

h1 {
    font-size: clamp(42px, 6vw, 56px);
    font-weight: 600;
    line-height: 1.07;
    letter-spacing: -0.28px;
}

h2 {
    font-size: clamp(32px, 4vw, 40px);
    font-weight: 600;
    line-height: 1.10;
    letter-spacing: 0;
}

h3 {
    font-size: 21px;
    font-weight: 600;
    line-height: 1.19;
    letter-spacing: 0.231px;
}

p {
    color: var(--color-ink-secondary);
    line-height: 1.65;
}

/* ─── Navigation ─── */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    height: var(--nav-height);
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.nav.scrolled {
    background: rgba(255, 255, 255, 0.88);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    backdrop-filter: saturate(180%) blur(20px);
    box-shadow: 0 1px 0 var(--color-hairline);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    width: min(calc(100% - 48px), var(--max-width));
    margin: 0 auto;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--color-ink);
    transition: opacity 0.2s ease;
}

.nav-logo:hover {
    opacity: 0.7;
}

.nav-logo-mark {
    color: var(--color-primary);
}

.nav-logo-text {
    font-family: var(--font-display);
    font-size: 17px;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.nav-links a {
    font-size: 14px;
    font-weight: 400;
    letter-spacing: -0.12px;
    color: var(--color-ink);
    opacity: 0.8;
    transition: opacity 0.2s ease;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 1px;
    background: var(--color-primary);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.25s ease;
}

.nav-links a:hover {
    opacity: 1;
}

.nav-links a:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

.nav-hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 28px;
    height: 28px;
    padding: 2px;
}

.nav-hamburger span {
    display: block;
    width: 100%;
    height: 1.5px;
    background: var(--color-ink);
    border-radius: 1px;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-hamburger.active span:nth-child(1) {
    transform: translateY(6.5px) rotate(45deg);
}

.nav-hamburger.active span:nth-child(2) {
    opacity: 0;
}

.nav-hamburger.active span:nth-child(3) {
    transform: translateY(-6.5px) rotate(-45deg);
}

.nav-mobile {
    display: none;
    flex-direction: column;
    gap: 0;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.96);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    backdrop-filter: saturate(180%) blur(20px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    z-index: 99;
    transform: translateY(-10px);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

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

.nav-mobile a {
    display: block;
    padding: var(--space-lg) var(--space-xl);
    font-size: 17px;
    font-weight: 500;
    border-bottom: 1px solid var(--color-hairline);
    color: var(--color-ink);
    transition: background-color 0.15s ease;
}

.nav-mobile a:hover {
    background: var(--color-parchment);
}

/* ─── Buttons ─── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    height: 44px;
    padding: 0 22px;
    border-radius: var(--radius-pill);
    font-family: var(--font-body);
    font-size: 17px;
    font-weight: 400;
    letter-spacing: -0.12px;
    transition: transform 0.15s ease, background-color 0.2s ease, border-color 0.2s ease;
    will-change: transform;
}

.btn:active {
    transform: scale(0.95);
}

.btn-primary {
    background: var(--color-primary);
    color: #ffffff;
}

.btn-primary:hover {
    background: var(--color-primary-hover);
}

.btn-ghost {
    background: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
}

.btn-ghost:hover {
    background: var(--color-primary-soft);
}

/* ─── Hero Section ─── */
.hero {
    position: relative;
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: calc(var(--nav-height) + 40px) var(--space-xl) var(--space-xxl);
}

.hero-canvas {
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
}

.hero-orb {
    position: absolute;
    border-radius: 50%;
    will-change: transform;
}

.hero-orb--1 {
    width: 600px;
    height: 600px;
    top: -10%;
    right: -8%;
    background: radial-gradient(circle, rgba(0, 102, 204, 0.07) 0%, transparent 65%);
}

.hero-orb--2 {
    width: 450px;
    height: 450px;
    bottom: 5%;
    left: -5%;
    background: radial-gradient(circle, rgba(0, 122, 227, 0.05) 0%, transparent 60%);
}

.hero-orb--3 {
    width: 300px;
    height: 300px;
    top: 30%;
    left: 40%;
    background: radial-gradient(circle, rgba(0, 102, 204, 0.04) 0%, transparent 55%);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 720px;
}

.hero-eyebrow {
    font-family: var(--font-display);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-primary);
    margin-bottom: var(--space-lg);
}

.hero-title {
    margin-bottom: var(--space-lg);
}

.hero-sub {
    max-width: 52ch;
    margin: 0 auto var(--space-xl);
    font-size: 19px;
    line-height: 1.5;
    color: var(--color-ink-muted);
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.hero-scroll-hint {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translate3d(-50%, 0, 0);
    color: var(--color-ink-muted);
    opacity: 0.5;
    animation: scrollHintFloat 2s ease-in-out infinite;
}

.hero-scroll-dot {
    animation: scrollDotMove 1.8s ease-in-out infinite;
}

@keyframes scrollHintFloat {
    0%, 100% { transform: translate3d(-50%, 0, 0); }
    50% { transform: translate3d(-50%, 6px, 0); }
}

@keyframes scrollDotMove {
    0%, 100% { cy: 10; }
    50% { cy: 18; }
}

/* ─── Section Base ─── */
.section {
    padding: var(--space-section) 0;
}

.section--story {
    background: var(--color-parchment);
}

.section--services {
    background: var(--color-canvas);
}

.section--contact {
    background: var(--color-parchment);
}

.section-header {
    text-align: center;
    max-width: 620px;
    margin: 0 auto var(--space-xxl);
}

.section-header h2 {
    margin-bottom: var(--space-sm);
}

.section-header-sub {
    font-size: 19px;
    color: var(--color-ink-muted);
}

/* ─── Story Section ─── */
.story-grid {
    max-width: 680px;
    margin: 0 auto;
}

.story-text h2 {
    margin-bottom: var(--space-lg);
}

.story-text p + p {
    margin-top: var(--space-sm);
}

/* ─── Services Grid ─── */
.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
}

.service-card {
    padding: var(--space-xxl);
    background: var(--color-canvas);
    border: 1px solid var(--color-hairline);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    transition: box-shadow 0.3s ease, transform 0.3s ease;
    will-change: transform;
}

.service-card:hover {
    box-shadow: var(--shadow-card-hover);
    transform: translate3d(0, -4px, 0);
}

.service-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    border-radius: var(--radius-md);
    background: var(--color-primary-soft);
    color: var(--color-primary);
    margin-bottom: var(--space-lg);
}

.service-card h3 {
    margin-bottom: var(--space-sm);
}

.service-card p {
    font-size: 15px;
    line-height: 1.6;
}

/* ─── Contact Section ─── */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: var(--space-xxl);
    align-items: start;
}

.contact-text h2 {
    margin-bottom: var(--space-lg);
}

.contact-text p {
    max-width: 42ch;
}

.contact-form {
    background: var(--color-canvas);
    border: 1px solid var(--color-hairline);
    border-radius: var(--radius-lg);
    padding: var(--space-xxl);
    box-shadow: var(--shadow-card);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
}

.form-group {
    margin-bottom: var(--space-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--space-xs);
    font-family: var(--font-display);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.06em;
    color: var(--color-ink);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 11px 16px;
    border: 1px solid var(--color-hairline-input);
    border-radius: var(--radius-sm);
    background: var(--color-canvas);
    color: var(--color-ink);
    font-family: var(--font-body);
    font-size: 15px;
    line-height: 1.4;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    outline: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-ink-muted);
    opacity: 0.6;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.12);
}

.form-group select {
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%2386868b' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 40px;
    cursor: pointer;
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-lg);
    margin-top: var(--space-sm);
}

.form-status {
    font-size: 14px;
    color: var(--color-ink-muted);
    min-height: 20px;
}

.btn-submit {
    gap: 8px;
}

.btn-submit svg {
    flex-shrink: 0;
}

/* ─── Footer ─── */
.footer {
    background: var(--color-canvas);
    border-top: 1px solid var(--color-hairline);
    padding: var(--space-xl) 0;
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: center;
}

.footer-logo {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--color-ink);
    opacity: 0.5;
    transition: opacity 0.2s ease;
}

.footer-logo:hover {
    opacity: 1;
}

.footer-logo-mark {
    color: var(--color-primary);
}

.footer-logo span {
    font-family: var(--font-display);
    font-size: 15px;
    font-weight: 600;
    letter-spacing: -0.01em;
}

/* ─── Scroll Reveal Animation ─── */
[data-reveal] {
    opacity: 0;
    transform: translate3d(0, 28px, 0);
    transition: opacity 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    will-change: opacity, transform;
}

[data-reveal].is-visible {
    opacity: 1;
    transform: translate3d(0, 0, 0);
}

/* Staggered reveal for grid children */
.services-grid [data-reveal]:nth-child(2) { transition-delay: 0.08s; }
.services-grid [data-reveal]:nth-child(3) { transition-delay: 0.16s; }
.services-grid [data-reveal]:nth-child(4) { transition-delay: 0.24s; }

/* ─── Responsive: Tablet (≤ 1024px) ─── */
@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }

    .contact-text p {
        max-width: none;
    }

    .footer-inner {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }

    .footer-legal {
        text-align: left;
    }
}

/* ─── Responsive: Mobile (≤ 768px) ─── */
@media (max-width: 768px) {
    :root {
        --space-section: 56px;
    }

    .nav-links {
        display: none;
    }

    .nav-hamburger {
        display: flex;
    }

    .nav-mobile {
        display: flex;
    }

    .hero {
        padding: calc(var(--nav-height) + 24px) var(--space-lg) var(--space-xl);
        min-height: auto;
        padding-top: calc(var(--nav-height) + 80px);
        padding-bottom: 80px;
    }

    .hero-orb--1 { width: 350px; height: 350px; }
    .hero-orb--2 { width: 280px; height: 280px; }
    .hero-orb--3 { width: 180px; height: 180px; }

    .hero-scroll-hint {
        display: none;
    }

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

    .service-card {
        padding: var(--space-xl);
    }

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

    .contact-form {
        padding: var(--space-xl);
    }

    .form-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .footer-nav {
        flex-direction: column;
        gap: var(--space-sm);
    }

    .footer-legal-links {
        flex-direction: column;
        gap: var(--space-xs);
    }
}

/* ─── Responsive: Small phone (≤ 480px) ─── */
@media (max-width: 480px) {
    .container {
        width: calc(100% - 32px);
    }

    .hero-title {
        font-size: 36px;
    }

    .service-card {
        padding: var(--space-lg);
    }

    .contact-form {
        padding: var(--space-lg);
    }

    .btn {
        width: 100%;
        text-align: center;
    }

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