/* ========================================
   GRAVA DIGITAL — style.css
   Swiss Atelier aesthetic
   ======================================== */

/* --- VARIABLES --- */
:root {
  --bg: #f8f7f4;
  --white: #ffffff;
  --text: #1c1b18;
  --mid: #636054;
  --soft: #a09c90;
  --accent: #b8302a;
  --accent-hover: #a02820;
  --pale: #fdf5f3;
  --border: #e6e3db;
  --cream: #efece5;
  --radius: 14px;
  --radius-sm: 8px;
  --radius-pill: 20px;
  --font-serif: 'Fraunces', Georgia, serif;
  --font-sans: 'Karla', system-ui, -apple-system, sans-serif;
  --transition: 0.25s ease;
}

/* --- RESET --- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { text-decoration: none; color: inherit; }
img { display: block; max-width: 100%; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* --- LAYOUT --- */
.wrap {
  max-width: 1060px;
  margin: 0 auto;
  padding: 0 36px;
}

/* --- NAV --- */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(248, 247, 244, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1060px;
  margin: 0 auto;
  padding: 0 36px;
  height: 64px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}
.logo-icon { width: 32px; height: 32px; }
.logo-text {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.3px;
}
.nav-right {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav-links {
  display: flex;
  gap: 24px;
}
.nav-links a {
  font-size: 13px;
  color: var(--soft);
  font-weight: 400;
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--text); }
.lang-switch {
  display: flex;
  gap: 2px;
}
.lang-btn {
  font-size: 11px;
  font-weight: 600;
  padding: 6px 10px;
  border-radius: 4px;
  color: var(--soft);
  transition: all var(--transition);
}
.lang-btn:hover { color: var(--text); }
.lang-btn.active {
  background: var(--accent);
  color: #fff;
}

/* Mobile menu button */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}
.mobile-menu-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all var(--transition);
}

/* --- HERO --- */
.hero {
  padding: 80px 0 64px;
}
.hero-top {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 32px;
}
.hero-line {
  width: 40px;
  height: 2px;
  background: var(--accent);
}
.hero-tag {
  font-size: 11px;
  letter-spacing: 3px;
  color: var(--accent);
  text-transform: uppercase;
  font-weight: 600;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 56px;
  align-items: start;
}
.hero h1 {
  font-family: var(--font-serif);
  font-size: 46px;
  font-weight: 400;
  line-height: 1.12;
  letter-spacing: -0.5px;
  color: var(--text);
}
.hero h1 em {
  font-style: italic;
  color: var(--accent);
}
.hero-right {
  padding-top: 16px;
}
.hero-right p {
  font-size: 15px;
  color: var(--mid);
  line-height: 1.85;
  font-weight: 300;
  margin-bottom: 32px;
}
.hero-btns {
  display: flex;
  gap: 12px;
}
.btn-primary {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  padding: 13px 28px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  transition: background var(--transition), transform 0.15s;
}
.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}
.btn-secondary {
  display: inline-block;
  border: 1px solid var(--border);
  color: var(--mid);
  padding: 13px 28px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  transition: all var(--transition);
}
.btn-secondary:hover {
  border-color: var(--text);
  color: var(--text);
}

/* --- TRUST BAR --- */
.trust {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 40px 0;
  margin-bottom: 72px;
}
.trust-inner {
  display: flex;
  justify-content: center;
  gap: 56px;
}
.trust-item { text-align: center; }
.trust-val {
  font-family: var(--font-serif);
  font-size: 24px;
  color: var(--text);
  font-weight: 400;
}
.trust-label {
  font-size: 11px;
  color: var(--soft);
  margin-top: 2px;
  letter-spacing: 0.5px;
}

/* --- SECTION TAGS --- */
.section-tag {
  font-size: 10px;
  letter-spacing: 3.5px;
  color: var(--soft);
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: 36px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.section-tag-sm { margin-bottom: 14px; }
.tag-line {
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* --- PROJECTS --- */
.projects {
  padding: 0 0 72px;
}
.case-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 20px;
  transition: border-color var(--transition);
}
.case-card:hover {
  border-color: #ccc;
}
.case-inner {
  display: grid;
  grid-template-columns: 2fr 3fr;
}
.case-visual {
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  
}
.case-visual { position: relative; }
.case-visual::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.5);
  border-radius: inherit;
}
.case-brand { position: relative; z-index: 1; }
.v-cleanflow {
  background: linear-gradient(145deg, #080e0a, #0c0c0a);
}
.v-paride {
  background: linear-gradient(145deg, #14100a, #0c0a08);
}
.case-brand { text-align: center; }
.brand-name {
  display: block;
  font-size: 30px;
  font-weight: 600;
  letter-spacing: -1px;
}
.brand-name.green { color: #4ade80; }
.brand-name.gold { color: #c9a96e; }
.brand-sub {
  display: block;
  font-size: 11px;
  color: #555;
  margin-top: 6px;
}
.case-pill {
  position: absolute;
  top: 16px;
  left: 16px;
  font-size: 10px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 12px;
}
.pill-live {
  color: #4ade80;
  background: rgba(74, 222, 128, 0.07);
  border: 1px solid rgba(74, 222, 128, 0.12);
}
.pill-wip {
  color: #c9a96e;
  background: rgba(201, 169, 110, 0.07);
  border: 1px solid rgba(201, 169, 110, 0.12);
}
.case-body {
  padding: 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.case-type {
  font-size: 10px;
  letter-spacing: 2.5px;
  color: var(--accent);
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: 10px;
}
.case-body h3 {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 400;
  line-height: 1.3;
  margin-bottom: 14px;
}
.case-problem {
  font-size: 13px;
  color: var(--mid);
  line-height: 1.75;
  font-weight: 300;
  margin-bottom: 18px;
}
.case-sol-label {
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--soft);
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: 6px;
}
.case-solution {
  font-size: 13px;
  color: var(--mid);
  line-height: 1.75;
  font-weight: 300;
}
.case-tags {
  padding: 0 40px 28px;
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.tag {
  font-size: 10px;
  font-weight: 500;
  color: var(--mid);
  background: var(--cream);
  padding: 5px 14px;
  border-radius: var(--radius-pill);
}

/* --- APPROACH --- */
.approach {
  padding: 0 0 72px;
}
.approach-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 16px;
}
.approach-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px;
  transition: border-color var(--transition);
}
.approach-card:hover {
  border-color: var(--accent);
}
.approach-num {
  font-family: var(--font-serif);
  font-size: 36px;
  color: var(--accent);
  margin-bottom: 16px;
  font-weight: 300;
}
.approach-card h4 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 8px;
}
.approach-card p {
  font-size: 13px;
  color: var(--mid);
  line-height: 1.75;
  font-weight: 300;
}

/* --- ABOUT --- */
.about {
  padding: 72px 0;
  border-top: 1px solid var(--border);
}
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  margin-top: 32px;
}
.about-text p {
  font-size: 15px;
  color: var(--mid);
  line-height: 1.9;
  font-weight: 300;
}
.stack-pills {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 8px;
}
.pill {
  font-size: 12px;
  font-weight: 500;
  color: var(--text);
  background: var(--white);
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
}

/* --- TESTIMONIAL --- */
.testimonial {
  padding: 72px 0;
  border-top: 1px solid var(--border);
}
.testi-card {
  background: var(--pale);
  border: 1px solid #f0ddd8;
  border-radius: var(--radius);
  padding: 48px;
  position: relative;
}
.testi-accent {
  position: absolute;
  top: 24px;
  left: 40px;
  font-family: var(--font-serif);
  font-size: 80px;
  color: var(--accent);
  opacity: 0.12;
  line-height: 1;
  pointer-events: none;
}
.testi-quote {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 400;
  line-height: 1.5;
  font-style: italic;
  max-width: 620px;
  margin-bottom: 28px;
  position: relative;
  z-index: 1;
}
.testi-quote em {
  font-style: normal;
  color: var(--accent);
}
.testi-author {
  display: flex;
  align-items: center;
  gap: 14px;
  position: relative;
  z-index: 1;
}
.testi-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--white);
  border: 1px solid #f0ddd8;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  color: var(--accent);
}
.testi-name {
  font-size: 14px;
  font-weight: 600;
  font-style: normal;
  display: block;
}
.testi-role {
  font-size: 12px;
  color: var(--soft);
  display: block;
}

/* --- CTA --- */
.cta {
  padding: 0 0 48px;
}
.cta-box {
  border-radius: var(--radius);
  overflow: hidden;
  display: grid;
  grid-template-columns: 1.5fr 1fr;
}
.cta-left {
  background: var(--text);
  padding: 52px 44px;
}
.cta-left h2 {
  font-family: var(--font-serif);
  font-size: 28px;
  color: var(--bg);
  font-weight: 400;
  margin-bottom: 8px;
}
.cta-left p {
  font-size: 13px;
  color: #6b6960;
}
.cta-right {
  background: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
}
.cta-btn {
  display: inline-block;
  background: var(--white);
  color: var(--accent);
  padding: 16px 36px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  transition: transform 0.15s;
}
.cta-btn:hover {
  transform: scale(1.03);
}

/* --- FOOTER --- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 0 40px;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.footer-copy {
  font-size: 11px;
  color: var(--soft);
}
.footer-links {
  display: flex;
  gap: 20px;
}
.footer-links a {
  font-size: 11px;
  color: var(--soft);
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--text); }

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .hero h1 { font-size: 36px; }
  .case-inner { grid-template-columns: 1fr; }
  .case-visual { min-height: 200px; }
  .approach-grid { grid-template-columns: 1fr; gap: 12px; }
  .about-grid { grid-template-columns: 1fr; gap: 32px; }
  .cta-box { grid-template-columns: 1fr; }
  .cta-right { padding: 32px; }
  .trust-inner {
    flex-wrap: wrap;
    gap: 24px 40px;
  }
}

@media (max-width: 640px) {
  .wrap { padding: 0 20px; }
  .nav-inner { padding: 0 20px; }
  .nav-links { display: none; }
  .mobile-menu-btn { display: flex; }
  .hero { padding: 48px 0 40px; }
  .hero h1 { font-size: 30px; }
  .hero-right p { font-size: 14px; }
  .hero-btns { flex-direction: column; }
  .btn-primary, .btn-secondary { text-align: center; }
  .case-body { padding: 24px; }
  .case-tags { padding: 0 24px 20px; }
  .testi-card { padding: 32px 24px; }
  .testi-quote { font-size: 18px; }
  .cta-left { padding: 36px 24px; }
  .footer-inner { flex-direction: column; gap: 12px; text-align: center; }
  .trust-inner { gap: 16px 32px; }
  .trust-val { font-size: 20px; }

/* ========================================
   ANIMATIONS
   ======================================== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

  /* Mobile menu open state */
  nav.menu-open .nav-links {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 20px;
    gap: 16px;
  }
  nav.menu-open .nav-links a {
    font-size: 16px;
  }
}