/*
 * Createch - Design System
 * Editorial, minimal, premium
 */

/* ===== CSS Variables ===== */
:root {
  --color-bg: #fafafa;
  --color-bg-alt: #f5f5f5;
  --color-surface: #ffffff;
  --color-text: #1a1a1a;
  --color-text-secondary: #666666;
  --color-text-tertiary: #999999;
  --color-accent: #0a0a0a;
  --color-border: #e5e5e5;
  --color-border-subtle: #f0f0f0;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.333rem;
  --font-size-2xl: 1.777rem;
  --font-size-3xl: 2.369rem;
  --font-size-4xl: 3.157rem;
  --font-size-5xl: 4.209rem;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.08);
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0a0a0a;
    --color-bg-alt: #111111;
    --color-surface: #1a1a1a;
    --color-text: #f5f5f5;
    --color-text-secondary: #a0a0a0;
    --color-text-tertiary: #666666;
    --color-accent: #ffffff;
    --color-border: #2a2a2a;
    --color-border-subtle: #1f1f1f;
  }
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; } }
body { font-family: var(--font-sans); font-size: var(--font-size-base); line-height: 1.5; color: var(--color-text); background: var(--color-bg); min-height: 100vh; display: flex; flex-direction: column; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--duration-fast) var(--ease-out); }
a:hover { color: var(--color-accent); }
ul { list-style: none; }
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
::selection { background: var(--color-accent); color: var(--color-bg); }

/* ===== Typography ===== */
h1, h2, h3, h4 { font-weight: 500; line-height: 1.1; letter-spacing: -0.02em; }
h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
p { color: var(--color-text-secondary); line-height: 1.75; }
.text-display { font-size: var(--font-size-5xl); font-weight: 500; line-height: 1.1; letter-spacing: -0.02em; }
.text-caption { font-size: var(--font-size-sm); color: var(--color-text-tertiary); letter-spacing: 0.05em; text-transform: uppercase; }
@media (max-width: 768px) { h1, .text-display { font-size: var(--font-size-3xl); } h2 { font-size: var(--font-size-2xl); } }

/* ===== Layout ===== */
.container { width: 100%; max-width: 1400px; margin: 0 auto; padding: 0 var(--space-6); }
.section { padding: var(--space-20) 0; }
.section--large { padding: var(--space-24) 0; }
main { flex: 1; }

/* ===== Header ===== */
.header { position: fixed; top: 0; left: 0; right: 0; z-index: 100; background: var(--color-bg); border-bottom: 1px solid var(--color-border-subtle); transition: transform var(--duration-normal) var(--ease-out); }
.header.is-hidden { transform: translateY(-100%); }
.header__inner { display: flex; align-items: center; justify-content: space-between; height: 80px; }
.header__logo img { height: 36px; width: auto; }
.header__nav { display: none; }
@media (min-width: 768px) { .header__nav { display: flex; gap: var(--space-10); } }
.header__nav a { font-size: var(--font-size-sm); font-weight: 500; letter-spacing: 0.05em; text-transform: uppercase; color: var(--color-text-secondary); position: relative; }
.header__nav a::after { content: ''; position: absolute; bottom: -4px; left: 0; width: 100%; height: 1px; background: var(--color-text); transform: scaleX(0); transform-origin: right; transition: transform var(--duration-normal) var(--ease-out); }
.header__nav a:hover, .header__nav a.active { color: var(--color-text); }
.header__nav a:hover::after, .header__nav a.active::after { transform: scaleX(1); transform-origin: left; }

/* Mobile Menu */
.menu-toggle { display: flex; align-items: center; justify-content: center; width: 44px; height: 44px; background: none; border: none; cursor: pointer; z-index: 101; }
@media (min-width: 768px) { .menu-toggle { display: none; } }
.menu-toggle span { position: relative; width: 24px; height: 2px; background: var(--color-text); transition: background var(--duration-fast); }
.menu-toggle span::before, .menu-toggle span::after { content: ''; position: absolute; left: 0; width: 100%; height: 2px; background: var(--color-text); transition: transform var(--duration-normal) var(--ease-out); }
.menu-toggle span::before { top: -8px; }
.menu-toggle span::after { bottom: -8px; }
.menu-toggle.active span { background: transparent; }
.menu-toggle.active span::before { transform: translateY(8px) rotate(45deg); }
.menu-toggle.active span::after { transform: translateY(-8px) rotate(-45deg); }
.mobile-menu { position: fixed; inset: 0; background: var(--color-bg); display: flex; align-items: center; justify-content: center; opacity: 0; visibility: hidden; transition: opacity var(--duration-normal), visibility var(--duration-normal); z-index: 99; }
.mobile-menu.active { opacity: 1; visibility: visible; }
@media (min-width: 768px) { .mobile-menu { display: none; } }
.mobile-menu__nav { text-align: center; }
.mobile-menu__nav a { display: block; font-size: var(--font-size-2xl); font-weight: 500; padding: var(--space-4) 0; }

/* ===== Footer ===== */
.footer { background: var(--color-bg-alt); padding: var(--space-16) 0; margin-top: auto; }
.footer__grid { display: grid; gap: var(--space-10); }
@media (min-width: 768px) { .footer__grid { grid-template-columns: 2fr 1fr 1fr; } }
.footer__logo img { height: 30px; margin-bottom: var(--space-4); }
.footer__tagline { font-size: var(--font-size-sm); color: var(--color-text-tertiary); }
.footer__heading { font-size: var(--font-size-xs); font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-text-tertiary); margin-bottom: var(--space-4); }
.footer__links { display: flex; flex-direction: column; gap: var(--space-3); }
.footer__links a { font-size: var(--font-size-sm); color: var(--color-text-secondary); }
.footer__links a:hover { color: var(--color-text); }
.footer__bottom { margin-top: var(--space-12); padding-top: var(--space-8); border-top: 1px solid var(--color-border); font-size: var(--font-size-xs); color: var(--color-text-tertiary); }

/* ===== Buttons ===== */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2); padding: var(--space-4) var(--space-8); font-family: var(--font-sans); font-size: var(--font-size-sm); font-weight: 500; letter-spacing: 0.05em; text-transform: uppercase; border: 1px solid transparent; cursor: pointer; transition: all var(--duration-normal) var(--ease-out); }
.btn--primary { background: var(--color-accent); color: var(--color-bg); border-color: var(--color-accent); }
.btn--primary:hover { background: var(--color-text-secondary); border-color: var(--color-text-secondary); }
.btn--secondary { background: transparent; color: var(--color-text); border-color: var(--color-border); }
.btn--secondary:hover { border-color: var(--color-text); }

/* ===== Hero ===== */
.hero { min-height: calc(100vh - 80px); display: flex; align-items: center; padding-top: calc(80px + var(--space-16)); }
.hero__content { max-width: 900px; }
.hero__label { margin-bottom: var(--space-6); }
.hero__title { margin-bottom: var(--space-8); }
.hero__title span { color: var(--color-text-secondary); }
.hero__subtitle { font-size: var(--font-size-lg); max-width: 600px; margin-bottom: var(--space-10); }
.hero__actions { display: flex; gap: var(--space-4); flex-wrap: wrap; }
@media (max-width: 640px) { .hero__actions { flex-direction: column; } .hero__actions .btn { width: 100%; } }

/* ===== Cards ===== */
.card { padding: var(--space-8); border: 1px solid var(--color-border); background: var(--color-surface); transition: transform var(--duration-normal) var(--ease-out), box-shadow var(--duration-normal) var(--ease-out); }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
@media (prefers-reduced-motion: reduce) { .card:hover { transform: none; } }
.card__number { font-size: var(--font-size-sm); color: var(--color-text-tertiary); margin-bottom: var(--space-4); }
.card__title { font-size: var(--font-size-xl); margin-bottom: var(--space-3); }
.card__text { font-size: var(--font-size-sm); }

/* ===== Grid ===== */
.grid { display: grid; gap: var(--space-6); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 1024px) { .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; } }

/* ===== Proof Points ===== */
.proof { background: var(--color-bg-alt); }
.proof__metric { font-size: var(--font-size-4xl); font-weight: 600; line-height: 1; margin-bottom: var(--space-2); }
.proof__label { font-size: var(--font-size-lg); font-weight: 500; margin-bottom: var(--space-2); }

/* ===== Services ===== */
.service-item { display: grid; gap: var(--space-8); padding: var(--space-16) 0; border-bottom: 1px solid var(--color-border); }
@media (min-width: 768px) { .service-item { grid-template-columns: 100px 1fr; gap: var(--space-12); } }
.service-item__number { font-size: var(--font-size-sm); color: var(--color-text-tertiary); }
.service-item__title { font-size: var(--font-size-2xl); margin-bottom: var(--space-2); }
.service-item__subtitle { font-size: var(--font-size-lg); color: var(--color-text-secondary); margin-bottom: var(--space-4); }
.service-item__caps { margin-top: var(--space-6); }
.service-item__caps h4 { font-size: var(--font-size-xs); font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-text-tertiary); margin-bottom: var(--space-4); }
.service-item__caps li { font-size: var(--font-size-sm); color: var(--color-text-secondary); padding-left: var(--space-4); position: relative; margin-bottom: var(--space-2); }
.service-item__caps li::before { content: ''; position: absolute; left: 0; top: 0.65em; width: 6px; height: 1px; background: var(--color-text-tertiary); }

/* ===== Work ===== */
.work-card { background: var(--color-surface); border: 1px solid var(--color-border); }
.work-card:hover { border-color: var(--color-text); }
.work-card__header { display: flex; justify-content: space-between; padding: var(--space-6) var(--space-8); border-bottom: 1px solid var(--color-border-subtle); }
.work-card__body { padding: var(--space-8); }
.work-card__title { font-size: var(--font-size-xl); margin-bottom: var(--space-4); }
.work-card__outcome { margin-top: var(--space-6); padding: var(--space-6); background: var(--color-bg-alt); }
.work-card__outcome-label { display: block; font-size: var(--font-size-xs); letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-text-tertiary); margin-bottom: var(--space-1); }
.work-card__outcome-value { font-size: var(--font-size-lg); font-weight: 600; }

/* ===== About ===== */
.about-intro { display: grid; gap: var(--space-12); }
@media (min-width: 1024px) { .about-intro { grid-template-columns: 1fr 400px; gap: var(--space-20); } }
.about-intro__text p { font-size: var(--font-size-lg); margin-bottom: var(--space-6); }
.about-photo { aspect-ratio: 3/4; background: var(--color-bg-alt); border: 1px solid var(--color-border); display: flex; flex-direction: column; align-items: center; justify-content: center; gap: var(--space-2); }
.about-photo span:first-child { font-size: var(--font-size-lg); font-weight: 500; }
.about-photo span:last-child { font-size: var(--font-size-sm); color: var(--color-text-tertiary); }

/* ===== Contact ===== */
.contact-grid { display: grid; gap: var(--space-12); }
@media (min-width: 768px) { .contact-grid { grid-template-columns: 1fr 1fr; } }
.contact-channel { margin-bottom: var(--space-8); }
.contact-channel__label { font-size: var(--font-size-xs); font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-text-tertiary); margin-bottom: var(--space-2); }
.contact-channel__value { font-size: var(--font-size-lg); }
.contact-cta { background: var(--color-bg-alt); padding: var(--space-10); border: 1px solid var(--color-border-subtle); height: 100%; display: flex; flex-direction: column; }
.contact-cta h3 { font-size: var(--font-size-xl); margin-bottom: var(--space-4); }
.contact-cta p { flex: 1; margin-bottom: var(--space-8); }
.contact-cta .btn { width: 100%; }

/* ===== FAQ ===== */
.faq { background: var(--color-bg-alt); }
.faq__list { max-width: 900px; margin: 0 auto; }
.faq-item { background: var(--color-surface); border: 1px solid var(--color-border-subtle); margin-bottom: var(--space-1); }
.faq-item summary { padding: var(--space-6); font-size: var(--font-size-lg); font-weight: 500; cursor: pointer; display: flex; justify-content: space-between; align-items: center; list-style: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: '+'; font-size: var(--font-size-xl); color: var(--color-text-tertiary); transition: transform var(--duration-normal); }
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item__answer { padding: 0 var(--space-6) var(--space-6); }

/* ===== CTA Section ===== */
.cta { text-align: center; }
.cta__content { max-width: 700px; margin: 0 auto; }
.cta h2 { margin-bottom: var(--space-6); }
.cta p { font-size: var(--font-size-lg); margin-bottom: var(--space-10); }
.cta__actions { display: flex; flex-direction: column; align-items: center; gap: var(--space-6); }
@media (min-width: 640px) { .cta__actions { flex-direction: row; justify-content: center; } }

/* ===== 404 ===== */
.not-found { min-height: calc(100vh - 80px); display: flex; align-items: center; justify-content: center; padding-top: 80px; text-align: center; }
.not-found__code { font-size: var(--font-size-5xl); font-weight: 700; color: var(--color-border); margin-bottom: var(--space-4); }
.not-found h1 { margin-bottom: var(--space-4); }
.not-found p { font-size: var(--font-size-lg); margin-bottom: var(--space-8); }

/* ===== Page Headers ===== */
.page-header { padding-top: calc(80px + var(--space-16)); padding-bottom: var(--space-16); }
.page-header__label { margin-bottom: var(--space-4); }
.page-header h1 { margin-bottom: var(--space-6); max-width: 800px; }
.page-header p { font-size: var(--font-size-lg); max-width: 600px; }

/* ===== Link Underline ===== */
.link-underline { position: relative; display: inline-block; }
.link-underline::after { content: ''; position: absolute; bottom: -2px; left: 0; width: 100%; height: 1px; background: currentColor; transform: scaleX(0); transform-origin: right; transition: transform var(--duration-normal) var(--ease-out); }
.link-underline:hover::after { transform: scaleX(1); transform-origin: left; }

/* ===== Animations ===== */
.fade-in { opacity: 0; transform: translateY(20px); animation: fadeIn 0.6s var(--ease-out) forwards; }
.fade-in-delay-1 { animation-delay: 0.1s; }
.fade-in-delay-2 { animation-delay: 0.2s; }
@keyframes fadeIn { to { opacity: 1; transform: translateY(0); } }
@media (prefers-reduced-motion: reduce) { .fade-in { animation: none; opacity: 1; transform: none; } }