/* Brand Theme Setup */
:root {
  --bg-color: #0A0D12;
  --surface: #12161F;
  --border-line: rgba(0, 87, 117, 0.35);
  --border-subtle: rgba(0, 87, 117, 0.16);
  --text-primary: #F2F4F8;
  --text-secondary: #8891A3;
  --text-muted: #5A6270;
  --accent: #005775;
  --accent-bright: #00B4D8;
  --accent-soft: rgba(0, 87, 117, 0.22);
  --accent-contrast: #F2F4F8;

  /* Font Family Definitions */
  --font-heading: 'Syne', 'ZCOOL XiaoWei', 'Noto Serif SC', sans-serif;
  --font-body: 'DM Sans', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Rounded-corner scale */
  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --radius-pill: 999px;

  color-scheme: dark;
}

/* Light theme override */
html[data-theme="light"] {
  --bg-color: #F5F7FA;
  --surface: #ECEFF3;
  --border-line: rgba(2, 15, 37, 0.22);
  --border-subtle: rgba(2, 15, 37, 0.1);
  --text-primary: #12161F;
  --text-secondary: #5C6472;
  --text-muted: #8A93A3;
  --accent: #020F25;
  --accent-bright: #020F25;
  --accent-soft: rgba(2, 15, 37, 0.1);
  --accent-contrast: #F2F4F8;

  color-scheme: light;
}

html[data-theme="light"] nav {
  background: rgba(250, 246, 238, 0.85);
}

/* Theme toggle button */
.theme-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; border-radius: var(--radius-pill);
  border: 1px solid var(--border-line); background: transparent;
  color: var(--text-primary); cursor: pointer; transition: border-color 0.25s ease, background 0.25s ease;
  padding: 0; flex-shrink: 0;
}
.theme-toggle:hover { border-color: var(--accent); background: var(--surface); }
.theme-toggle svg { width: 18px; height: 18px; stroke: currentColor; fill: none; }
.theme-toggle .icon-moon { display: none; }
html[data-theme="light"] .theme-toggle .icon-sun { display: none; }
html[data-theme="light"] .theme-toggle .icon-moon { display: block; }

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 999;
  background: var(--text-primary); color: var(--bg-color);
  padding: 12px 20px; font-family: var(--font-mono); font-size: 0.85rem;
}
.skip-link:focus { left: 12px; top: 12px; }

.scroll-progress {
  position: fixed; top: 0; left: 0; height: 2px; width: 0%;
  background: var(--accent); z-index: 200; transition: width 0.1s ease-out;
}

body {
  position: relative;
  background-color: var(--bg-color);
  background-image:
    radial-gradient(ellipse 900px 500px at 15% 0%, var(--accent-soft), transparent 60%),
    radial-gradient(ellipse 700px 500px at 100% 8%, var(--accent-soft), transparent 55%);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
}
body::after {
  content: '';
  position: fixed; inset: 0; pointer-events: none; z-index: 1;
  opacity: 0.035; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='120' height='120'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
}

nav, .tier-card, .process-step, .case-card, .case-media, .faq-item, .cta-strip, input, textarea, select, .theme-toggle {
  transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

@media (prefers-reduced-motion: reduce) {
  body, nav, .tier-card, .process-step, .case-card, .case-media, .faq-item, .cta-strip, input, textarea, select, .theme-toggle {
    transition: none;
  }
}

::selection { background: var(--text-primary); color: var(--bg-color); }
a { color: inherit; text-decoration: none; }

.wrap { max-width: 1280px; margin: 0 auto; padding: 0 40px; }

/* Headings setup */
h1, h2, h3, h4, .logo {
  font-family: var(--font-heading);
  letter-spacing: -0.02em;
}

/* Navigation */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(14, 12, 9, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-line);
}
nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 80px; }
.logo { font-weight: 700; font-size: 1.35rem; letter-spacing: -0.02em; display: flex; align-items: center; gap: 10px; }
.logo-mark { width: 18px; height: 33px; color: var(--accent-bright); flex-shrink: 0; }
.logo span { font-family: var(--font-body); font-weight: 300; color: var(--text-secondary); font-size: 0.9rem; margin-left: 6px; }
.navlinks {
  display: flex; gap: 32px; font-size: 0.88rem; text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--text-secondary); flex-shrink: 0;
}
.navlinks a:hover { color: var(--text-primary); }
.navlinks a.active { color: var(--accent); }
.navlinks a { position: relative; padding-bottom: 4px; display: inline-block; min-width: 92px; text-align: center; }
.navlinks a::after {
  content: ''; position: absolute; left: 0; right: 100%; bottom: 0; height: 1px;
  background: var(--accent); transition: right 0.3s ease;
}
.navlinks a.active::after, .navlinks a:hover::after { right: 0; }
.nav-right { display: flex; align-items: center; gap: 24px; flex-shrink: 0; }

/* Language Switcher — FIXED WIDTH (No Layout Shift) */
.lang-switch {
  position: relative;
  display: flex;
  align-items: center;
  border: 1px solid var(--border-line);
  border-radius: var(--radius-pill);
  background: transparent;
  padding: 2px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  width: 96px;
  height: 32px;
  box-sizing: border-box;
  flex-shrink: 0;
}

.lang-switch .pill {
  position: absolute;
  top: 2px;
  bottom: 2px;
  width: 44px;
  background: var(--text-primary);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  left: 2px;
  border-radius: var(--radius-pill);
  pointer-events: none;
}

.lang-switch.en .pill {
  transform: translateX(46px);
}

.lang-switch button {
  position: relative;
  z-index: 1;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  padding: 0;
  cursor: pointer;
  font-family: inherit;
  font-size: inherit;
  transition: color 0.25s;
  width: 44px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.lang-switch.zh button.zh,
.lang-switch.en button.en {
  color: var(--bg-color);
  font-weight: 600;
}

.nav-cta {
  font-family: var(--font-mono); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.05em;
  padding: 10px 20px; border: 1px solid var(--accent-bright); color: var(--accent-bright); transition: all 0.35s ease;
  border-radius: var(--radius-pill); flex-shrink: 0; min-width: 128px; text-align: center;
  display: inline-block;
}
.nav-cta:hover { background: var(--accent-bright); color: var(--bg-color); }

/* Editorial Hero Section */
.hero { padding-top: 200px; padding-bottom: 120px; min-height: 780px; border-bottom: 1px solid var(--border-line); position: relative; overflow: hidden; }
.hero::before {
  content: ''; position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background-image: radial-gradient(var(--accent) 1px, transparent 1px);
  background-size: 30px 30px;
  opacity: 0.16;
  -webkit-mask-image: radial-gradient(ellipse 65% 65% at 76% 42%, black 15%, transparent 72%);
  mask-image: radial-gradient(ellipse 65% 65% at 76% 42%, black 15%, transparent 72%);
}
.hero-mark {
  position: absolute; top: 180px; right: 9%; width: 300px; height: 557px;
  color: var(--accent-bright); opacity: 0.16; pointer-events: none; z-index: 0;
}
.hero .wrap { position: relative; z-index: 1; }
@media(max-width: 900px) { .hero-mark { width: 200px; height: 370px; right: -6%; opacity: 0.12; } }

.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-secondary);
  text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 32px;
}
.eyebrow .dot { width: 6px; height: 6px; background: var(--accent); border-radius: 50%; }
.section-head .eyebrow .dot { width: 22px; height: 1px; border-radius: 0; background: var(--accent); }

.hero h1 {
  font-size: clamp(3.2rem, 6.2vw, 5.5rem);
  font-weight: 700; line-height: 1.05; letter-spacing: -0.03em; margin-bottom: 40px;
  max-width: 1080px;
}
.hero h1 .grad { font-style: italic; font-weight: 500; color: var(--accent); }

.hero p.lead { color: var(--text-secondary); font-size: 1.15rem; font-weight: 300; margin-bottom: 48px; max-width: 680px; line-height: 1.7; }
.hero-actions { display: flex; gap: 20px; align-items: center; }

.btn-primary {
  display: inline-flex; align-items: center; gap: 12px; background: var(--accent-bright);
  color: var(--bg-color); font-weight: 500; padding: 16px 36px; font-size: 0.9rem;
  border: 1px solid var(--accent-bright); cursor: pointer; transition: all 0.4s ease;
  border-radius: var(--radius-pill);
}
.btn-primary:hover { background: transparent; color: var(--accent-bright); }

.btn-ghost {
  display: inline-flex; align-items: center; padding: 16px 36px; font-size: 0.9rem;
  color: var(--text-primary); border: 1px solid var(--text-secondary); transition: all 0.35s ease;
  border-radius: var(--radius-pill);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }

.hero-stats {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; margin-top: 80px;
  padding-top: 40px; border-top: 1px solid var(--border-subtle); max-width: 720px;
}
.hero-stats .num { font-family: var(--font-heading); font-size: 2.2rem; font-weight: 600; color: var(--accent); }
.hero-stats .lbl { font-family: var(--font-mono); font-size: 0.72rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.08em; margin-top: 4px; }

/* Trust Bar */
.trust-bar { padding: 56px 0; border-bottom: 1px solid var(--border-line); background: var(--surface); }
.trust-strip { display: flex; }
.trust-item {
  flex: 1; display: flex; flex-direction: column; gap: 8px; text-align: center;
  padding: 4px 28px; border-left: 1px solid var(--border-line);
}
.trust-item:first-child { border-left: none; }
.trust-num { font-family: var(--font-heading); font-size: 1.7rem; font-weight: 700; color: var(--accent); letter-spacing: -0.01em; }
.trust-lbl { font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-secondary); line-height: 1.4; }
@media(max-width: 900px) {
  .trust-strip { flex-wrap: wrap; }
  .trust-item { flex: 1 1 50%; border-left: none; border-top: 1px solid var(--border-line); padding: 20px 16px; }
  .trust-item:first-child, .trust-item:nth-child(2) { border-top: none; }
}
@media(max-width: 560px) {
  .trust-item { flex: 1 1 100%; }
  .trust-item:nth-child(2) { border-top: 1px solid var(--border-line); }
}

/* Sections & Services */
section { padding: 140px 0; border-bottom: none; position: relative; }
section:not(:last-of-type) { border-bottom: 1px solid var(--border-line); }
section:not(:last-of-type)::before {
  content: ''; position: absolute; left: 50%; bottom: 0; transform: translate(-50%, 50%);
  width: 64px; height: 22px; background: var(--bg-color); z-index: 1;
}
section:not(:last-of-type)::after {
  content: ''; position: absolute; left: 50%; bottom: 0; z-index: 2;
  width: 10px; height: 10px; background: var(--accent);
  transform: translate(-50%, 50%) rotate(45deg);
  box-shadow: 0 0 10px var(--accent-soft);
}
.section-head { max-width: 720px; margin-bottom: 64px; }
.section-head h2 { font-size: clamp(2.2rem, 4vw, 3.2rem); font-weight: 600; letter-spacing: -0.02em; margin-bottom: 20px; }
.section-head p { color: var(--text-secondary); font-size: 1.05rem; font-weight: 300; }

.service-tabs {
  display: flex; flex-wrap: wrap; gap: 0; margin-bottom: 56px;
  border-bottom: 1px solid var(--border-line);
}
.tab-btn {
  font-family: var(--font-mono); font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--text-secondary); background: transparent; border: none; cursor: pointer;
  padding: 16px 28px 16px 0; margin-right: 32px; position: relative; transition: color 0.25s ease;
}
.tab-btn::after {
  content: ''; position: absolute; left: 0; right: 100%; bottom: -1px; height: 2px;
  background: var(--accent); transition: right 0.3s ease;
}
.tab-btn:hover { color: var(--accent); }
.tab-btn.active { color: var(--accent); font-weight: 600; }
.tab-btn.active::after { right: 0; }
@media(max-width: 640px) { .tab-btn { padding: 12px 0; margin-right: 20px; font-size: 0.74rem; } }

.service-panel { display: none; }
.service-panel.active { display: block; animation: panelFade 0.4s ease; }
@keyframes panelFade { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
@media (prefers-reduced-motion: reduce) { .service-panel.active { animation: none; } }

.service-block { margin-bottom: 88px; }
.service-block:last-of-type { margin-bottom: 48px; }
.service-head { margin-bottom: 32px; }
.service-index { font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-muted); letter-spacing: 0.05em; }
.service-block h3 { font-size: 1.7rem; font-weight: 600; margin: 10px 0 8px; }
.service-tagline { color: var(--text-secondary); font-size: 0.98rem; font-weight: 300; font-style: italic; }

.tier-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
}
/* Two remaining tiers keep the three-column card width and sit centred */
.tier-grid--two {
  grid-template-columns: repeat(2, calc((100% - 40px) / 3));
  justify-content: center;
}
.tier-card {
  position: relative; background: transparent;
  border: 1px solid var(--border-line); border-radius: var(--radius-md); overflow: hidden;
  padding: 32px 26px; display: flex; flex-direction: column; transition: background 0.3s ease, border-color 0.3s ease;
}
.tier-card:hover { background: var(--surface); border-color: var(--accent); }
.tier-card.most-value { background: var(--surface); border-color: var(--accent); }
.tier-badge {
  position: absolute; top: -1px; right: -1px; font-family: var(--font-mono); font-size: 0.65rem;
  text-transform: uppercase; letter-spacing: 0.06em; background: var(--accent-bright); color: var(--bg-color);
  padding: 5px 12px; border-radius: 0 var(--radius-md) 0 var(--radius-sm);
}
.tier-name { font-family: var(--font-heading); font-size: 1.1rem; font-weight: 600; display: block; margin-bottom: 10px; }
.tier-desc { color: var(--text-secondary); font-size: 0.86rem; font-weight: 300; line-height: 1.6; margin-bottom: 22px; min-height: 62px; }
.tier-features { list-style: none; display: flex; flex-direction: column; gap: 10px; border-top: 1px solid var(--border-subtle); padding-top: 18px; margin-bottom: 22px; flex-grow: 1; }
.tier-features li { display: flex; flex-direction: column; gap: 2px; font-size: 0.82rem; }
.tier-features li span { font-family: var(--font-mono); color: var(--text-muted); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.05em; }
.tier-features li b { font-weight: 500; color: var(--text-primary); }
.tier-price { font-family: var(--font-heading); font-size: 1.5rem; font-weight: 700; color: var(--accent); padding-top: 18px; border-top: 1px solid var(--border-subtle); }

.addon-note {
  margin-top: 20px; padding: 16px 20px; border: 1px dashed var(--border-line); border-radius: var(--radius-sm);
  font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-secondary); line-height: 1.9;
}
.addon-note span[data-i18n="addon.label"] { color: var(--text-primary); font-weight: 600; margin-right: 4px; }

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

/* Process */
.process { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.process-step { padding: 40px 28px; border: 1px solid var(--border-line); border-radius: var(--radius-md); transition: border-color 0.3s ease, background 0.3s ease; }
.process-step:hover { border-color: var(--accent); background: var(--surface); }
.process-step .n { font-family: var(--font-mono); color: var(--text-muted); font-size: 0.78rem; margin-bottom: 24px; display: block; }
.process-step h4 { font-size: 1.25rem; font-weight: 600; margin-bottom: 12px; }
.process-step p { color: var(--text-secondary); font-size: 0.88rem; font-weight: 300; }

/* Portfolio Cases */
.portfolio-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.portfolio-grid--single { grid-template-columns: 1fr; }
/* Thirty-second summary above the full case log */
.modal-summary {
  margin: 22px 0 4px; padding: 20px 22px;
  border: 1px solid var(--border-subtle); border-left: 2px solid var(--accent-bright);
  border-radius: var(--radius-sm); background: var(--surface);
}
.modal-summary p { margin: 0 0 12px; font-size: 0.95rem; line-height: 1.65; color: var(--text-secondary); }
.modal-summary p:last-child { margin-bottom: 0; }
.modal-summary-lbl {
  display: block; margin-bottom: 3px;
  font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--accent-bright);
}
@media(max-width: 640px) { .modal-summary { padding: 16px 18px; } }
/* reCAPTCHA is a cross-origin iframe — its interior cannot be styled. Frame it with
   the site's own border and radius so it reads as a deliberate component, and nudge
   the colour temperature toward the cool palette. */
.recaptcha-box {
  display: inline-block; line-height: 0; overflow: hidden;
  margin: 8px 0 4px; min-height: 78px;
  border: 1px solid var(--border-line); border-radius: var(--radius-sm);
  background: var(--surface);
  filter: brightness(0.88) saturate(0.85) hue-rotate(-8deg);
}
html[data-theme="light"] .recaptcha-box { filter: none; }
.form-error--captcha { display: none; }
@media(max-width: 400px) {
  .recaptcha-box { transform: scale(0.86); transform-origin: left top; min-height: 68px; }
}
.portfolio-grid--single .case-media--preview { height: 460px; }
@media(max-width: 640px) { .portfolio-grid--single .case-media--preview { height: 300px; } }
.case-card { border: 1px solid var(--border-line); border-radius: var(--radius-md); background: transparent; transition: border-color 0.3s ease; overflow: hidden; }
.case-card:hover { border-color: var(--accent); }
.case-media {
  height: 240px; background: var(--surface); border-bottom: 1px solid var(--border-line);
  display: flex; align-items: center; justify-content: center;
}
.case-media span {
  font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-muted); letter-spacing: 0.08em;
}
.case-body { padding: 36px; }
.case-tag { font-family: var(--font-mono); font-size: 0.72rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 12px; display: block; }
.case-body h3 { font-size: 1.5rem; font-weight: 600; margin-bottom: 12px; }
.case-body p { color: var(--text-secondary); font-size: 0.92rem; font-weight: 300; }

/* Browser-preview style case media */
.case-media--preview { height: auto; flex-direction: column; align-items: stretch; justify-content: flex-start; padding: 0; position: relative; }
.browser-chrome {
  width: 100%; height: 34px; background: var(--bg-color); display: flex; align-items: center; gap: 6px;
  padding: 0 12px; flex-shrink: 0; border-bottom: 1px solid var(--border-line);
}
.chrome-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--border-line); }
.chrome-dot.r { background: #FF5F57; }
.chrome-dot.y { background: #FEBC2E; }
.chrome-dot.g { background: #28C840; }
.browser-url {
  margin-left: 8px; font-family: var(--font-mono); font-size: 0.72rem; color: var(--text-muted);
  background: var(--surface); padding: 3px 12px; border-radius: 999px; flex: 1; max-width: 280px;
}
.browser-frame-wrap { position: relative; width: 100%; aspect-ratio: 4 / 3; overflow: hidden; background: var(--bg-color); }
.browser-frame {
  position: absolute; top: 0; left: 0; width: 1440px; height: 1080px;
  border: none; pointer-events: none; background: var(--bg-color); transform-origin: top left;
}
.fullscreen-btn {
  position: absolute; right: 14px; bottom: 14px; width: 38px; height: 38px; border-radius: 50%;
  background: var(--accent-bright); color: var(--bg-color); display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 14px rgba(0,0,0,0.35); transition: transform 0.25s ease;
}
.fullscreen-btn svg { width: 16px; height: 16px; }
.fullscreen-btn:hover { transform: scale(1.1); }
.case-view-btn {
  margin-top: 18px; background: none; border: none; padding: 0; cursor: pointer;
  font-family: var(--font-mono); font-size: 0.82rem; color: var(--accent); display: inline-flex; align-items: center; gap: 6px;
  transition: gap 0.25s ease;
}
.case-view-btn:hover { gap: 10px; color: var(--accent-bright); }

/* FAQ */
.faq-list { display: flex; flex-direction: column; gap: 14px; }
.faq-item { border: 1px solid var(--border-line); border-radius: var(--radius-md); padding: 0 20px; transition: border-color 0.3s ease, background 0.3s ease; }
.faq-item:hover { border-color: var(--accent); }
.faq-item[open] { background: var(--surface); }
.faq-item summary {
  list-style: none; cursor: pointer; display: flex; align-items: center; justify-content: space-between;
  padding: 24px 0; font-size: 1.05rem; font-weight: 500; letter-spacing: -0.01em;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item .faq-icon { font-family: var(--font-mono); color: var(--text-muted); font-size: 1.1rem; transition: transform 0.25s ease; }
.faq-item[open] .faq-icon { transform: rotate(45deg); color: var(--accent); }
.faq-item p { color: var(--text-secondary); font-size: 0.94rem; font-weight: 300; padding: 0 0 24px; max-width: 760px; }
.faq-item summary:hover { color: var(--text-secondary); }

/* CTA Strip */
.cta-strip { border: 1px solid var(--border-line); border-radius: var(--radius-lg); padding: 80px 48px; text-align: center; background: var(--surface); }
.cta-strip h2 { font-size: clamp(2rem, 3.5vw, 3rem); font-weight: 600; margin-bottom: 20px; }
.cta-strip p { color: var(--text-secondary); font-size: 1.05rem; font-weight: 300; margin-bottom: 40px; }

/* Contact */
.contact-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 80px; }
.contact-info .item { margin-bottom: 36px; }
.contact-info .lbl { font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 8px; }
.contact-info .val { font-size: 1.1rem; font-weight: 300; }
.contact-info .val a { color: var(--text-primary); transition: color 0.25s ease; }
.contact-info .val a:hover { color: var(--accent); }

form { display: flex; flex-direction: column; gap: 20px; }
input, textarea, select {
  background: transparent; border: 1px solid var(--border-line); border-radius: var(--radius-sm);
  padding: 16px 20px; color: var(--text-primary); font-family: var(--font-body);
  font-size: 0.95rem; font-weight: 300; transition: border-color 0.25s ease;
}
select option { background: var(--bg-color); color: var(--text-primary); }
input:focus, textarea:focus, select:focus { outline: none; border-color: var(--accent); }
textarea { resize: vertical; min-height: 120px; }
label { font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: -10px; }
.submitted { display: none; color: var(--accent); font-family: var(--font-mono); font-size: 0.85rem; }
.form-error { display: none; color: #E5484D; font-family: var(--font-mono); font-size: 0.85rem; }
.form-privacy { margin-top: 16px; color: var(--text-muted); font-size: 0.78rem; line-height: 1.6; }

footer { padding: 72px 0 0; }
.footer-grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px;
  padding-bottom: 56px;
}
.footer-brand { display: flex; flex-direction: column; gap: 18px; }
.footer-tagline { font-family: var(--font-heading); font-size: 1.2rem; color: var(--text-secondary); line-height: 1.4; }
.footer-tagline .grad { color: var(--accent); font-style: italic; }
.footer-col h4 {
  font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-muted); text-transform: uppercase;
  letter-spacing: 0.08em; margin-bottom: 20px; font-weight: 500;
}
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 12px; }
.footer-col ul li a {
  color: var(--text-secondary); font-size: 0.9rem; transition: color 0.25s ease;
}
.footer-col ul li a:hover { color: var(--accent); }
.footer-placeholder {
  display: flex; align-items: center; gap: 8px; color: var(--text-muted); font-size: 0.9rem;
}
.soon-tag {
  font-family: var(--font-mono); font-size: 0.62rem; text-transform: uppercase; letter-spacing: 0.04em;
  border: 1px solid var(--border-line); border-radius: var(--radius-pill); padding: 2px 8px; color: var(--text-muted);
}
.footer-bottom { border-top: 1px solid var(--border-line); padding: 24px 0; }
.footer-bottom .wrap { display: flex; justify-content: center; }
footer .fmuted { color: var(--text-muted); font-size: 0.85rem; font-family: var(--font-mono); }

@media(max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px 24px; }
  .footer-brand { grid-column: 1 / -1; }
}
@media(max-width: 560px) {
  .footer-grid { grid-template-columns: 1fr; }
}

/* Back to top */
.back-to-top {
  position: fixed; right: 28px; bottom: 28px; z-index: 150;
  width: 46px; height: 46px; border-radius: 50%;
  background: var(--accent-bright); color: var(--bg-color); border: none; cursor: pointer;
  font-size: 1.1rem; opacity: 0; transform: translateY(12px); pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease, background 0.25s ease;
}
.back-to-top.visible { opacity: 1; transform: translateY(0); pointer-events: auto; }
.back-to-top:hover { background: var(--text-primary); }

/* Scroll reveal */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s ease, transform 0.7s ease; }
.process .process-step:nth-child(2) { transition-delay: 0.08s; }
.process .process-step:nth-child(3) { transition-delay: 0.16s; }
.process .process-step:nth-child(4) { transition-delay: 0.24s; }
.portfolio-grid .case-card:nth-child(2) { transition-delay: 0.08s; }
.reveal.in-view { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* Responsive adjustments */
@media(max-width: 900px) {
  .process { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .portfolio-grid { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: 1fr; gap: 24px; }
}
/* Mobile navigation */
.nav-toggle {
  display: none; flex-direction: column; justify-content: center; gap: 5px;
  width: 38px; height: 38px; border: 1px solid var(--border-line); border-radius: 50%;
  background: transparent; cursor: pointer; flex-shrink: 0;
}
.nav-toggle span {
  display: block; width: 15px; height: 1.5px; margin: 0 auto; background: var(--text-primary);
  transition: transform 0.25s ease, opacity 0.25s ease;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

.mobile-nav {
  display: none; flex-direction: column; overflow: hidden;
  max-height: 0; transition: max-height 0.35s ease;
  border-bottom: 1px solid var(--border-line); background: var(--bg-color);
}
.mobile-nav.open { max-height: 400px; }
.mobile-nav a {
  padding: 16px 32px; color: var(--text-secondary); font-size: 0.95rem;
  border-bottom: 1px solid var(--border-subtle); text-transform: uppercase; letter-spacing: 0.06em; font-size: 0.85rem;
}
.mobile-nav a:hover, .mobile-nav a.active { color: var(--accent); }

@media(max-width: 820px) {
  .navlinks { display: none; }
  .nav-cta { display: none; }
  .nav-toggle { display: flex; }
  .mobile-nav { display: flex; }
  .wrap { padding: 0 24px; }
  .nav-right { gap: 14px; }
}
@media(max-width: 400px) {
  .logo span { display: none; }
}

/* Case study modal */
.case-modal-overlay {
  position: fixed; inset: 0; z-index: 500; display: flex; align-items: center; justify-content: center;
  background: rgba(0,0,0,0.7); backdrop-filter: blur(6px); opacity: 0; pointer-events: none;
  transition: opacity 0.3s ease; padding: 40px 20px;
}
.case-modal-overlay.active { opacity: 1; pointer-events: auto; }
.case-modal {
  position: relative; width: 100%; max-width: 780px; max-height: 86vh; background: var(--bg-color);
  border: 1px solid var(--border-line); border-radius: var(--radius-lg); overflow: hidden;
  transform: translateY(16px) scale(0.98); transition: transform 0.3s ease;
}
.case-modal-overlay.active .case-modal { transform: translateY(0) scale(1); }
.case-modal-scroll { max-height: 86vh; overflow-y: auto; padding: 48px; }
.case-modal-close {
  position: absolute; top: 20px; right: 20px; z-index: 2; width: 38px; height: 38px; border-radius: 50%;
  background: var(--surface); border: 1px solid var(--border-line); color: var(--text-primary); font-size: 1.3rem;
  line-height: 1; cursor: pointer; transition: border-color 0.25s ease, color 0.25s ease;
}
.case-modal-close:hover { border-color: var(--accent); color: var(--accent); }
.modal-title { font-size: 2rem; font-weight: 700; margin: 10px 0 4px; }
.modal-subtitle { color: var(--text-secondary); font-size: 1rem; margin-bottom: 28px; }
.modal-meta-grid { display: flex; flex-wrap: wrap; gap: 24px; padding: 20px 0; border-top: 1px solid var(--border-line); border-bottom: 1px solid var(--border-line); margin-bottom: 24px; }
.modal-meta-item { display: flex; flex-direction: column; gap: 4px; }
.modal-meta-lbl { font-family: var(--font-mono); font-size: 0.7rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.06em; }
.modal-meta-val { font-size: 0.92rem; color: var(--text-primary); }
.modal-meta-val a { color: var(--accent); }
.modal-meta-val a:hover { color: var(--accent-bright); }
.tech-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 36px; }
.chip { font-family: var(--font-mono); font-size: 0.72rem; color: var(--text-secondary); border: 1px solid var(--border-line); border-radius: var(--radius-pill); padding: 5px 14px; }
.modal-section { margin-bottom: 32px; }
.modal-section h3 { font-size: 1.15rem; font-weight: 600; margin-bottom: 12px; color: var(--accent); }
.modal-section p { color: var(--text-secondary); font-size: 0.92rem; line-height: 1.75; margin-bottom: 12px; }
.modal-section p strong { color: var(--text-primary); font-weight: 500; }
.modal-pull-quote { font-family: var(--font-heading); font-style: italic; font-size: 1.2rem; color: var(--accent-bright); margin-top: 16px; }
.modal-list { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.modal-list li { position: relative; padding-left: 18px; color: var(--text-secondary); font-size: 0.9rem; line-height: 1.6; }
.modal-list li::before { content: ''; position: absolute; left: 0; top: 9px; width: 6px; height: 6px; background: var(--accent); transform: rotate(45deg); }
.modal-stat-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.modal-stat { display: flex; flex-direction: column; gap: 6px; border: 1px solid var(--border-line); border-radius: var(--radius-md); padding: 16px; text-align: center; }
.modal-stat-num { font-family: var(--font-heading); font-size: 1.5rem; font-weight: 700; color: var(--accent-bright); }
.modal-stat-lbl { font-family: var(--font-mono); font-size: 0.7rem; color: var(--text-secondary); line-height: 1.4; }
.modal-cta { margin: 36px 0 24px; }
.modal-footer-note { font-family: var(--font-mono); font-size: 0.76rem; color: var(--text-muted); border-top: 1px solid var(--border-line); padding-top: 20px; line-height: 1.6; }
@media(max-width: 640px) {
  .case-modal-scroll { padding: 32px 24px; }
  .modal-stat-row { grid-template-columns: 1fr 1fr; }
}