/* ============================================================
   WEICO TECHNOLOGIES — Global Stylesheet
   Aesthetic: Modern tech · Clean precision
   ============================================================ */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500&family=Noto+Sans+SC:wght@300;400;500;700&display=swap');

/* ========================= CSS VARIABLES ========================= */
:root {
  /* --- Light Theme — bright, lively, tech-forward --- */
  --bg-primary: #FFFFFF;
  --bg-secondary: #F4F7FB;
  --bg-tertiary: #E8EDF5;
  --bg-card: #FFFFFF;
  --bg-card-hover: #F8FAFF;
  --bg-hero: linear-gradient(168deg, #1A2744 0%, #162038 50%, #111B30 100%);
  --bg-accent-block: #1A2744;

  --text-primary: #1A2035;
  --text-secondary: #445067;
  --text-tertiary: #8994A8;
  --text-inverse: #F4F7FB;
  --text-on-accent: #FFFFFF;

  --accent: #2D6FF2;
  --accent-light: #5B93FF;
  --accent-dark: #1B5AD4;
  --accent-secondary: #10B4A8;
  --accent-bg: rgba(45, 111, 242, 0.06);
  --accent-border: rgba(45, 111, 242, 0.18);
  --accent-glow: rgba(45, 111, 242, 0.18);

  --border: rgba(26, 32, 53, 0.08);
  --border-strong: rgba(26, 32, 53, 0.14);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.02);
  --shadow-md: 0 4px 18px rgba(45, 111, 242, 0.07), 0 2px 6px rgba(0,0,0,0.03);
  --shadow-lg: 0 12px 42px rgba(45, 111, 242, 0.09), 0 4px 14px rgba(0,0,0,0.04);
  --shadow-xl: 0 24px 64px rgba(45, 111, 242, 0.12), 0 8px 22px rgba(0,0,0,0.05);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --nav-bg: rgba(255, 255, 255, 0.92);
  --nav-border: rgba(26, 32, 53, 0.05);

  --tag-bg: rgba(45, 111, 242, 0.07);
  --tag-text: #2D6FF2;
  --tag-border: rgba(45, 111, 242, 0.15);

  --code-bg: #F4F7FB;

  --gradient-accent: linear-gradient(135deg, #2D6FF2, #10B4A8);
  --gradient-dark: linear-gradient(135deg, #1A2744, #162038);
}

[data-theme="dark"] {
  --bg-primary: #131B2E;
  --bg-secondary: #1C2640;
  --bg-tertiary: #2A3654;
  --bg-card: #1C2640;
  --bg-card-hover: #243050;
  --bg-hero: linear-gradient(168deg, #131B2E 0%, #1C2640 40%, #131B2E 100%);
  --bg-accent-block: #131B2E;

  --text-primary: #F0F4FA;
  --text-secondary: #97A4BC;
  --text-tertiary: #677590;
  --text-inverse: #131B2E;
  --text-on-accent: #FFFFFF;

  --accent: #4B8EFF;
  --accent-light: #6DA8FF;
  --accent-dark: #2D6FF2;
  --accent-secondary: #1DC9BA;
  --accent-bg: rgba(75, 142, 255, 0.1);
  --accent-border: rgba(75, 142, 255, 0.22);
  --accent-glow: rgba(75, 142, 255, 0.2);

  --border: rgba(151, 164, 188, 0.1);
  --border-strong: rgba(151, 164, 188, 0.16);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.25);
  --shadow-md: 0 4px 18px rgba(0,0,0,0.3);
  --shadow-lg: 0 12px 42px rgba(0,0,0,0.35);
  --shadow-xl: 0 24px 64px rgba(0,0,0,0.4);

  --nav-bg: rgba(19, 27, 46, 0.92);
  --nav-border: rgba(151, 164, 188, 0.08);

  --tag-bg: rgba(75, 142, 255, 0.12);
  --tag-text: #6DA8FF;
  --tag-border: rgba(75, 142, 255, 0.2);

  --code-bg: #1C2640;

  --gradient-accent: linear-gradient(135deg, #4B8EFF, #1DC9BA);
  --gradient-dark: linear-gradient(135deg, #1C2640, #131B2E);
}

/* ========================= RESET & BASE ========================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  transition: background 0.4s ease, color 0.4s ease;
  overflow-x: hidden;
}

a { color: var(--accent); text-decoration: none; transition: color 0.25s ease; }
a:hover { color: var(--accent-light); }

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

::selection {
  background: var(--accent);
  color: var(--text-on-accent);
}

/* ========================= TYPOGRAPHY ========================= */
h1, h2, h3 {
  font-family: 'Inter', 'Noto Sans SC', sans-serif;
  line-height: 1.15;
  letter-spacing: -0.025em;
  color: var(--text-primary);
}

h1 { font-size: clamp(2.6rem, 5.5vw, 4.2rem); font-weight: 800; }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.8rem); font-weight: 700; }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); font-weight: 700; }

h4, h5, h6 {
  font-family: 'Inter', 'Noto Sans SC', sans-serif;
  font-weight: 600;
  line-height: 1.4;
}

.label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.body-lg { font-size: 1.125rem; line-height: 1.8; color: var(--text-secondary); }

/* ========================= LAYOUT ========================= */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 clamp(1.5rem, 4vw, 4rem);
}

.container--narrow { max-width: 900px; }
.container--wide { max-width: 1440px; }

.section {
  padding: clamp(4rem, 8vw, 8rem) 0;
}

.grid {
  display: grid;
  gap: 2rem;
}

.grid--2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 400px), 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr)); }
.grid--4 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr)); }

/* ========================= NAVIGATION ========================= */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--nav-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--nav-border);
  transition: all 0.3s ease;
}

.nav.scrolled {
  box-shadow: var(--shadow-md);
}

.nav__inner {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 clamp(1.5rem, 4vw, 4rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: 'Inter', sans-serif;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
}

.nav__logo-mark {
  width: 36px;
  height: 36px;
  background: var(--gradient-accent);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Inter', sans-serif;
  font-size: 1.2rem;
  color: #FFFFFF;
  font-weight: 800;
  box-shadow: 0 2px 8px rgba(45, 111, 242, 0.3);
  transition: box-shadow 0.3s ease;
}

.nav__logo:hover .nav__logo-mark {
  box-shadow: 0 4px 14px rgba(45, 111, 242, 0.4);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav__links a {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  position: relative;
  padding: 0.25rem 0;
  transition: color 0.2s;
}

.nav__links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--gradient-accent);
  border-radius: 1px;
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav__links a:hover,
.nav__links a.active {
  color: var(--text-primary);
}

.nav__links a:hover::after,
.nav__links a.active::after {
  width: 100%;
}

.nav__controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav__btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  transition: all 0.2s;
}

.nav__btn:hover {
  border-color: var(--accent-border);
  color: var(--accent);
  background: var(--accent-bg);
}

.nav__btn svg { width: 18px; height: 18px; }

/* Mobile menu */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}

.nav__hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  transition: all 0.3s;
  border-radius: 2px;
}

.nav__hamburger.open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.nav__hamburger.open span:nth-child(2) {
  opacity: 0;
}
.nav__hamburger.open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

.nav__mobile {
  display: flex;
  visibility: hidden;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 999;
  padding: 2rem;
  flex-direction: column;
  gap: 0.5rem;
  opacity: 0;
  transform: translateY(-10px);
  transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

/* Solid background — light theme */
.nav__mobile {
  background: #FFFFFF;
}
/* Solid background — dark theme */
[data-theme="dark"] .nav__mobile {
  background: #131B2E;
}

.nav__mobile.open {
  visibility: visible;
  opacity: 1;
  transform: translateY(0);
}

.nav__mobile a {
  display: flex;
  align-items: center;
  padding: 1rem 0;
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border);
  text-decoration: none;
  min-height: 48px;
}

.nav__mobile a:hover,
.nav__mobile a.active {
  color: var(--accent);
}

@media (max-width: 900px) {
  .nav__links { display: none; }
  .nav__hamburger { display: flex; }
}

/* ========================= HERO ========================= */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--bg-hero);
  overflow: hidden;
  padding-top: 72px;
}

.hero__grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(45, 111, 242, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(45, 111, 242, 0.08) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 80%);
}

.hero__particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.hero__particle {
  position: absolute;
  width: 3px;
  height: 3px;
  background: var(--accent);
  border-radius: 50%;
  opacity: 0;
  animation: particleFade 4s infinite;
}

@keyframes particleFade {
  0%, 100% { opacity: 0; transform: translateY(0) scale(0.5); }
  50% { opacity: 0.6; transform: translateY(-40px) scale(1); }
}

.hero__content {
  position: relative;
  z-index: 2;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 clamp(1.5rem, 4vw, 4rem);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  width: 100%;
}

.hero__text { color: #F0F4FA; }

.hero__label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.9rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.hero__label::before {
  content: '';
  width: 32px;
  height: 1px;
  background: var(--accent);
}

.hero h1 {
  color: #F0F4FA;
  margin-bottom: 1.5rem;
  font-size: clamp(2.6rem, 5.5vw, 4.2rem);
}

.hero h1 em {
  font-style: normal;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__desc {
  font-size: 1.1rem;
  line-height: 1.85;
  color: rgba(244, 247, 251, 0.75);
  margin-bottom: 2.5rem;
  max-width: 540px;
}

.hero__actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero__visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero__viz {
  width: 100%;
  max-width: 500px;
  aspect-ratio: 1;
  position: relative;
}

.hero__ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(45, 111, 242, 0.18);
  animation: ringRotate 30s linear infinite;
}

.hero__ring--1 { inset: 0; }
.hero__ring--2 { inset: 15%; animation-direction: reverse; animation-duration: 25s; border-color: rgba(16, 180, 168, 0.15); }
.hero__ring--3 { inset: 30%; animation-duration: 20s; border-color: rgba(45, 111, 242, 0.1); }

.hero__ring-dot {
  position: absolute;
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  top: -4px;
  left: 50%;
  box-shadow: 0 0 14px rgba(45, 111, 242, 0.65);
}

@keyframes ringRotate {
  to { transform: rotate(360deg); }
}

.hero__center-badge {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 140px;
  height: 140px;
  background: rgba(45, 111, 242, 0.1);
  border: 1px solid rgba(45, 111, 242, 0.22);
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(10px);
}

.hero__center-num {
  font-family: 'Inter', sans-serif;
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--accent-light);
  line-height: 1;
}

.hero__center-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem;
  color: rgba(109, 168, 255, 0.75);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-top: 0.25rem;
}

.hero__stats {
  position: absolute;
  bottom: -2rem;
  left: 0;
  right: 0;
  display: flex;
  gap: 1px;
  background: rgba(45, 111, 242, 0.15);
  border-radius: var(--radius-md);
  overflow: hidden;
  max-width: 500px;
}

.hero__stat {
  flex: 1;
  padding: 1.25rem 1rem;
  background: rgba(19, 27, 46, 0.85);
  backdrop-filter: blur(12px);
  text-align: center;
  transition: background 0.3s ease;
}

.hero__stat:hover {
  background: rgba(19, 27, 46, 0.92);
}

.hero__stat-num {
  font-family: 'Inter', sans-serif;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--accent-light);
  line-height: 1;
}

.hero__stat-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem;
  color: rgba(244, 247, 251, 0.55);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: 0.35rem;
}

@media (max-width: 900px) {
  .hero__content { grid-template-columns: 1fr; text-align: center; }
  .hero__label {
    justify-content: center;
    font-size: clamp(0.75rem, 2.5vw, 0.9rem);
    letter-spacing: 0.1em;
    flex-wrap: nowrap;
    white-space: nowrap;
  }
  .hero__label::before { display: none; }
  .hero__desc { margin-left: auto; margin-right: auto; }
  .hero__actions { justify-content: center; }
  .hero__visual { display: none; }
}

/* ========================= BUTTONS ========================= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 2rem;
  font-family: 'Inter', sans-serif;
  font-size: 0.88rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  text-decoration: none;
  letter-spacing: 0.01em;
  position: relative;
}

.btn--primary {
  background: var(--accent);
  color: #FFFFFF;
  box-shadow: 0 2px 6px rgba(45, 111, 242, 0.25);
}

.btn--primary:hover {
  background: var(--accent-dark);
  color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: 0 6px 28px var(--accent-glow);
}

.btn--outline {
  background: transparent;
  color: var(--accent);
  border: 1.5px solid var(--accent-border);
}

.btn--outline:hover {
  background: var(--accent-bg);
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}

.btn--ghost {
  background: transparent;
  color: var(--text-secondary);
  padding: 0.85rem 1.5rem;
}

.btn--ghost:hover {
  color: var(--accent);
}

.btn svg { width: 16px; height: 16px; }

/* ========================= SECTION HEADERS ========================= */
.section-header {
  margin-bottom: clamp(3rem, 5vw, 4rem);
}

.section-header--center { text-align: center; }
.section-header--center .section-header__desc { margin-left: auto; margin-right: auto; }

.section-header__label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.section-header--center .section-header__label {
  justify-content: center;
}

.section-header__label::before {
  content: '';
  width: 28px;
  height: 1.5px;
  background: var(--gradient-accent);
  border-radius: 1px;
}

.section-header h2 {
  margin-bottom: 1.25rem;
}

.section-header__desc {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text-secondary);
  max-width: 640px;
}

/* ========================= CARDS ========================= */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-accent);
  opacity: 0;
  transition: opacity 0.35s ease;
}

.card:hover {
  border-color: var(--accent-border);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.card:hover::after {
  opacity: 1;
}

.card__icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--accent-bg), rgba(45, 111, 242, 0.08));
  border: 1px solid var(--accent-border);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.4s ease;
  padding: 12px;
}

.card__icon svg {
  width: 100%;
  height: 100%;
}

.card:hover .card__icon {
  transform: scale(1.1) translateY(-2px);
  box-shadow: 0 8px 24px rgba(45, 111, 242, 0.15);
}

.card__title {
  font-family: 'Inter', 'Noto Sans SC', sans-serif;
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.card__desc {
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

.card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 1.25rem;
}

.tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  padding: 0.3rem 0.65rem;
  background: var(--tag-bg);
  color: var(--tag-text);
  border: 1px solid var(--tag-border);
  border-radius: 4px;
  letter-spacing: 0.03em;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.tag:hover {
  background: var(--accent-border);
  border-color: var(--accent);
}

/* ========================= SERVICE CARDS ========================= */
.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  position: relative;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
  opacity: 0;
  transition: opacity 0.3s;
}

.service-card:hover {
  border-color: var(--accent-border);
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.service-card:hover::before { opacity: 1; }

.service-card__num {
  font-family: 'Inter', sans-serif;
  font-size: 3rem;
  font-weight: 800;
  color: var(--accent);
  opacity: 0.1;
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  line-height: 1;
}

.service-card__icon {
  width: 56px;
  height: 56px;
  margin-bottom: 1.5rem;
  color: var(--accent);
}

.service-card__icon svg {
  width: 100%;
  height: 100%;
}

.service-card h3 {
  margin-bottom: 1rem;
  font-size: 1.3rem;
}

.service-card__desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.service-card__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.service-card__list li {
  font-size: 0.85rem;
  color: var(--text-secondary);
  padding-left: 1.25rem;
  position: relative;
}

.service-card__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 1px;
  background: var(--accent);
}

/* ========================= CASE / PROJECT CARDS ========================= */
.case-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
}

.case-card:hover {
  border-color: var(--accent-border);
  box-shadow: var(--shadow-xl);
  transform: translateY(-5px);
}

.case-card__visual {
  height: 210px;
  position: relative;
  overflow: hidden;
}

.case-card__visual::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(0,0,0,0.06) 100%);
  z-index: 1;
  pointer-events: none;
}

.case-card__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top left;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.case-card:hover .case-card__img {
  transform: scale(1.06);
}

.case-card__pattern {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Industry-specific visual patterns (fallback) */
.case-card__pattern--aviation {
  background: linear-gradient(135deg, #132A4A 0%, #1E4472 50%, #132A4A 100%);
}

.case-card__pattern--fintech {
  background: linear-gradient(135deg, #1C2B44 0%, #2B4166 50%, #1C2B44 100%);
}

.case-card__pattern--commerce {
  background: linear-gradient(135deg, #33280F 0%, #4D3B18 50%, #33280F 100%);
}

.case-card__pattern--data {
  background: linear-gradient(135deg, #112A22 0%, #1E4838 50%, #112A22 100%);
}

.case-card__pattern-icon {
  font-size: 3rem;
  opacity: 0.25;
  color: var(--accent-light);
}

.case-card__meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.25rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: 0.65rem;
}

.case-card__category-badge {
  font-weight: 700;
  color: var(--accent);
}

.case-card__type-badge {
  font-weight: 600;
  color: var(--text-secondary);
}

.case-card__client {
  font-weight: 600;
  color: var(--text-secondary);
}

.case-card__meta-sep {
  color: var(--border);
  margin: 0 0.1rem;
}

.case-card__body {
  padding: 1.5rem 1.75rem 1.75rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.case-card__title {
  font-family: 'Inter', 'Noto Sans SC', sans-serif;
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 0.6rem;
  color: var(--text-primary);
  transition: color 0.2s ease;
}

.case-card:hover .case-card__title {
  color: var(--accent);
}

.case-card__desc {
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  flex: 1;
}

.case-card__footer {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  margin-top: auto;
}

/* ========================= CASE DETAIL (cases page) ========================= */
.case-detail {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 2.5rem;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.case-detail:hover {
  box-shadow: var(--shadow-xl);
  border-color: var(--accent-border);
}

.case-detail__header {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 320px;
}

.case-detail__visual {
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 320px;
  background: var(--bg-secondary);
}

.case-detail__visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  inset: 0;
  transition: transform 0.5s ease;
}

.case-detail:hover .case-detail__visual img {
  transform: scale(1.03);
}

.case-detail__visual-inner {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.case-detail__visual-icon {
  font-size: 5rem;
  opacity: 0.2;
  color: var(--accent-light);
}

/* Subtle overlay for better contrast on case images */
.case-detail__visual::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(26, 39, 68, 0.04) 0%, rgba(26, 39, 68, 0.08) 100%);
  z-index: 1;
  pointer-events: none;
}

/* Gallery for cases with multiple screenshots */
.case-detail__gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  padding: 0 2.5rem 1.5rem;
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
}

.case-detail__gallery-img {
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--border);
  aspect-ratio: 16 / 10;
  cursor: pointer;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.case-detail__gallery-img:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
}

.case-detail__gallery-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.case-detail__info {
  padding: 2.5rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0;
}

.case-detail__info .case-detail__meta {
  margin-bottom: 0.75rem;
}

.case-detail__meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.3rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: 1rem;
}

.case-detail__category-badge {
  font-weight: 700;
  color: var(--accent);
}

.case-detail__type-badge {
  font-weight: 600;
  color: var(--text-secondary);
}

.case-detail__highlight-badge {
  font-weight: 600;
  color: var(--accent-secondary);
}

.case-detail__meta-sep {
  color: var(--border-strong);
  margin: 0 0.15rem;
}

.case-detail__title {
  font-family: 'Inter', 'Noto Sans SC', sans-serif;
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 1rem;
}

.case-detail__desc {
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.case-detail__sections {
  padding: 2.5rem;
  border-top: 1px solid var(--border);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.case-detail__section h4 {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.case-detail__section p,
.case-detail__section ul {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

.case-detail__section ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.case-detail__section ul li {
  padding-left: 1rem;
  position: relative;
}

.case-detail__section ul li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 0.8rem;
}

.case-detail__tech {
  padding: 1.5rem 2.5rem;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.case-detail__tech-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-right: 0.5rem;
}

@media (max-width: 900px) {
  .case-detail__header { grid-template-columns: 1fr; }
  .case-detail__visual { min-height: 220px; }
  .case-detail__sections { grid-template-columns: 1fr; }
  .case-detail__gallery { grid-template-columns: 1fr 1fr; padding: 1rem 1.5rem; }
}

@media (max-width: 600px) {
  .case-detail__gallery { grid-template-columns: 1fr; }
}

/* ========================= CLIENTS ========================= */
.clients-section {
  background: var(--bg-secondary);
  scroll-margin-top: 80px;
}

.clients-grid {
  margin-bottom: 3rem;
}

.clients-grid__category {
  margin-bottom: 2.5rem;
}

.clients-grid__category:last-child {
  margin-bottom: 0;
}

.clients-grid__category-title {
  font-family: 'Inter', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-tertiary);
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}

.clients-grid__logos {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

.clients-grid__logo {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  min-height: 80px;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: default;
}

.clients-grid__logo:hover {
  border-color: var(--accent-border);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.clients-grid__logo img {
  max-width: 100%;
  max-height: 50px;
  object-fit: contain;
  opacity: 0.75;
  transition: opacity 0.3s;
  filter: var(--logo-filter, none);
}

.clients-grid__logo:hover img {
  opacity: 1;
}

/* Dark mode: invert logos slightly for visibility */
[data-theme="dark"] .clients-grid__logo img {
  filter: brightness(1.2);
}

.clients-strip {
  padding: 2rem 0 0;
  border-top: 1px solid var(--border);
  overflow: hidden;
}

.clients-strip__inner {
  display: flex;
  align-items: center;
  gap: 3rem;
  will-change: transform;
}

.clients-strip__item {
  flex-shrink: 0;
  font-family: 'Inter', sans-serif;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-tertiary);
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  opacity: 0.5;
  transition: opacity 0.3s;
}

.clients-strip__item:hover { opacity: 1; }

.clients-strip__dot {
  width: 5px;
  height: 5px;
  background: var(--accent);
  border-radius: 50%;
  opacity: 0.4;
}

@keyframes marquee-seamless {
  0% { transform: translateX(0); }
  100% { transform: translateX(var(--marquee-dist, -33.333%)); }
}

/* Responsive: client logos */
@media (max-width: 900px) {
  .clients-grid__logos {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 600px) {
  .clients-grid__logos {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
  }
  .clients-grid__logo {
    padding: 1rem;
    min-height: 60px;
  }
  .clients-grid__logo img {
    max-height: 40px;
  }
}

/* ========================= VALUES ========================= */
.values-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.value-cell {
  background: var(--bg-card);
  padding: 2.5rem 2rem;
  text-align: center;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.value-cell:hover {
  background: var(--accent-bg);
}

.value-cell__icon {
  font-size: 1.6rem;
  margin-bottom: 1.1rem;
  transition: transform 0.3s ease;
}

.value-cell:hover .value-cell__icon {
  transform: scale(1.12);
}

.value-cell h4 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
  transition: color 0.2s ease;
}

.value-cell:hover h4 {
  color: var(--accent);
}

.value-cell p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

@media (max-width: 768px) {
  .values-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ========================= TIMELINE ========================= */
.timeline {
  position: relative;
  padding-left: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--border-strong);
}

.timeline__item {
  position: relative;
  padding-bottom: 2.5rem;
  padding-left: 2rem;
}

.timeline__item::before {
  content: '';
  position: absolute;
  left: -2rem;
  top: 0.4rem;
  width: 9px;
  height: 9px;
  background: var(--accent);
  border-radius: 50%;
  transform: translateX(-4px);
  box-shadow: 0 0 0 3px var(--accent-bg);
  transition: box-shadow 0.3s ease;
}

.timeline__year {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.timeline__title {
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

.timeline__desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* ========================= CONTACT FORM ========================= */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 3rem;
}

.contact-info__item {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
  align-items: flex-start;
}

.contact-info__icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  background: var(--accent-bg);
  border: 1px solid var(--accent-border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  transition: all 0.3s ease;
}

.contact-info__item:hover .contact-info__icon {
  background: var(--accent);
  color: #FFFFFF;
  border-color: var(--accent);
  box-shadow: 0 4px 12px rgba(45, 111, 242, 0.3);
}

.contact-info__icon svg { width: 18px; height: 18px; }

.contact-info__label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: 0.3rem;
}

.contact-info__value {
  font-size: 0.95rem;
  color: var(--text-primary);
  font-weight: 500;
}

.form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
}

.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.form__group { display: flex; flex-direction: column; gap: 0.5rem; }

.form__label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.01em;
}

.form__input,
.form__textarea {
  padding: 0.9rem 1.1rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: 'Inter', 'Noto Sans SC', sans-serif;
  font-size: 0.9rem;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.form__input:hover,
.form__textarea:hover {
  border-color: var(--border-strong);
}

.form__input:focus,
.form__textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-bg);
}

.form__textarea { resize: vertical; min-height: 150px; }

.form .btn {
  align-self: flex-start;
}

@media (max-width: 768px) {
  .contact-grid { grid-template-columns: 1fr; }
  .form__row { grid-template-columns: 1fr; }
  .form { padding: 1.75rem; }
  .form .btn { width: 100%; justify-content: center; }
}

/* ========================= FOOTER ========================= */
.footer {
  background: var(--bg-accent-block);
  color: rgba(244, 247, 251, 0.65);
  padding: 5rem 0 2.5rem;
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.footer__brand {
  font-family: 'Inter', sans-serif;
  font-size: 1.3rem;
  font-weight: 700;
  color: #F0F4FA;
  margin-bottom: 1rem;
}

.footer__desc {
  font-size: 0.88rem;
  line-height: 1.75;
  max-width: 320px;
}

.footer h5 {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: 1.25rem;
}

.footer__links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer__links a {
  font-size: 0.88rem;
  color: rgba(244, 247, 251, 0.55);
  transition: color 0.25s ease;
}

.footer__links a:hover { color: #F0F4FA; }

.footer__bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255, 0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: rgba(244, 247, 251, 0.4);
}

@media (max-width: 768px) {
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .footer { padding: 3.5rem 0 2rem; }
}

@media (max-width: 480px) {
  .footer__grid { grid-template-columns: 1fr; gap: 2rem; }
}

/* ========================= CASE FILTERS ========================= */
.case-filters {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.case-filters__group {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.case-filters__divider {
  width: 1px;
  height: 24px;
  background: var(--border-strong);
  margin: 0 0.35rem;
  flex-shrink: 0;
}

.case-filter-btn {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  padding: 0.5rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.case-filter-btn:hover {
  border-color: var(--accent-border);
  color: var(--accent);
  background: var(--accent-bg);
}

.case-filter-btn.active {
  background: var(--accent);
  color: #FFFFFF;
  border-color: var(--accent);
  box-shadow: 0 2px 8px rgba(45, 111, 242, 0.3);
}

@media (max-width: 768px) {
  .case-filters__divider { display: none; }
  .case-filters { gap: 0.4rem; }
}

/* ========================= CAREER CARDS ========================= */
.career-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.career-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-accent);
  opacity: 0;
  transition: opacity 0.35s ease;
}

.career-card:hover {
  border-color: var(--accent-border);
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.career-card:hover::after {
  opacity: 1;
}

.career-card__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1rem;
  gap: 1rem;
}

.career-card__title {
  font-size: 1.15rem;
  font-weight: 600;
  transition: color 0.2s ease;
}

.career-card:hover .career-card__title {
  color: var(--accent);
}

.career-card__type {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  padding: 0.3rem 0.7rem;
  background: var(--accent-bg);
  color: var(--accent);
  border: 1px solid var(--accent-border);
  border-radius: 4px;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.career-card__meta {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 1rem;
  font-size: 0.85rem;
  color: var(--text-tertiary);
}

.career-card__desc {
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--text-secondary);
}

/* ========================= ABOUT PAGE ========================= */
.founder-section {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 3rem;
  align-items: start;
}

.founder-avatar {
  width: 300px;
  height: 360px;
  background: var(--gradient-dark);
  border-radius: var(--radius-md);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.founder-avatar__initials {
  font-family: 'Inter', sans-serif;
  font-size: 4rem;
  font-weight: 800;
  color: var(--accent);
  opacity: 0.3;
}

.founder-avatar::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(45, 111, 242, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(45, 111, 242, 0.06) 1px, transparent 1px);
  background-size: 20px 20px;
}

.founder-info h3 {
  font-size: 1.8rem;
  margin-bottom: 0.5rem;
}

.founder-info__role {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 1.5rem;
}

.founder-info__bio {
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.founder-info__highlights {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.highlight-item {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
}

.highlight-item__icon {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  background: var(--accent-bg);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
}

.highlight-item__text {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.highlight-item__text strong {
  color: var(--text-primary);
  display: block;
  font-size: 0.9rem;
}

@media (max-width: 768px) {
  .founder-section { grid-template-columns: 1fr; }
  .founder-avatar { width: 100%; max-width: 300px; margin: 0 auto; }
  .founder-info__highlights { grid-template-columns: 1fr; }
}

/* ========================= PUBLICATIONS ========================= */
.pub-item {
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border);
}

.pub-item:last-child { border-bottom: none; }

.pub-item__title {
  font-size: 0.95rem;
  font-weight: 500;
  margin-bottom: 0.25rem;
  color: var(--text-primary);
}

.pub-item__journal {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  color: var(--accent);
  margin-bottom: 0.25rem;
}

.pub-item__year {
  font-size: 0.8rem;
  color: var(--text-tertiary);
}

/* ========================= SCROLL ANIMATIONS ========================= */
.fade-in {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-delay-1 { transition-delay: 0.1s; }
.fade-in-delay-2 { transition-delay: 0.2s; }
.fade-in-delay-3 { transition-delay: 0.3s; }
.fade-in-delay-4 { transition-delay: 0.4s; }

/* ========================= DARK ACCENT SECTIONS ========================= */
.section--dark {
  background: var(--bg-accent-block);
  color: #F0F4FA;
}

.section--dark h2 { color: #F0F4FA; }
.section--dark .section-header__desc { color: rgba(244, 247, 251, 0.65); }
.section--dark .card {
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(255, 255, 255, 0.08);
}

.section--dark .card:hover {
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(255, 255, 255, 0.14);
}
.section--dark .card__title { color: #F0F4FA; }
.section--dark .card__desc { color: rgba(244, 247, 251, 0.65); }

/* Alt background section */
.section--alt {
  background: var(--bg-secondary);
}

/* ========================= CTA SECTION ========================= */
.cta-section {
  background: var(--bg-accent-block);
  padding: clamp(4.5rem, 9vw, 7rem) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 50%, rgba(45, 111, 242, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 50%, rgba(16, 180, 168, 0.1) 0%, transparent 50%);
}

.cta-section h2 { color: #F0F4FA; position: relative; margin-bottom: 1.25rem; }
.cta-section p { color: rgba(244, 247, 251, 0.7); position: relative; margin-bottom: 2.5rem; font-size: 1.1rem; line-height: 1.8; max-width: 560px; margin-left: auto; margin-right: auto; }
.cta-section .btn { position: relative; padding: 1rem 2.5rem; font-size: 0.92rem; }

/* ========================= PAGE HERO (Inner Pages) ========================= */
.page-hero {
  background: var(--bg-hero);
  padding: calc(72px + 4.5rem) 0 4.5rem;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(45, 111, 242, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(45, 111, 242, 0.05) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 80%);
}

.page-hero h1 { color: #F0F4FA; position: relative; margin-bottom: 1.25rem; }
.page-hero p { color: rgba(244, 247, 251, 0.7); position: relative; font-size: 1.1rem; max-width: 600px; line-height: 1.8; }

.page-hero .section-header__label { position: relative; }

/* ========================= MISC ========================= */
.divider {
  height: 1px;
  background: var(--border);
  margin: 0;
  border: none;
}

.text-accent { color: var(--accent); }
.text-secondary { color: var(--text-secondary); }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Scrollbar styling */
::-webkit-scrollbar { width: 7px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ========================= RESPONSIVE UTILITIES ========================= */

/* Tablet & medium screens */
@media (max-width: 900px) {
  .hero {
    min-height: 100vh;
    min-height: 100dvh;
    padding-top: 100px;
    padding-bottom: 3rem;
  }

  .section {
    padding: clamp(3rem, 6vw, 5rem) 0;
  }

  /* Compact page-hero on tablet */
  .page-hero {
    padding: calc(60px + 2.5rem) 0 2.5rem;
  }

  .page-hero h1 {
    font-size: 1.75rem;
    margin-bottom: 0.75rem;
  }

  .page-hero p {
    font-size: 0.95rem;
    line-height: 1.6;
  }

  .case-detail__info {
    padding: 2rem;
  }

  .case-detail__sections {
    padding: 2rem;
  }

  .case-detail__tech {
    padding: 1.25rem 2rem;
  }
}

/* Touch-friendly interactive elements */
@media (max-width: 768px) {
  .btn { min-height: 44px; }
  .nav__btn { min-width: 44px; min-height: 44px; }
  .nav__mobile a { min-height: 48px; }
  .case-filter-btn { min-height: 40px; }

  .values-grid { border-radius: var(--radius-md); }
  .value-cell { padding: 2rem 1.5rem; }
  .value-cell p { font-size: 0.82rem; }

  .service-card { padding: 2rem; }
  .service-card h3 { font-size: 1.15rem; }

  h1 { font-size: clamp(2rem, 5vw, 3rem); }
  h2 { font-size: clamp(1.5rem, 3.5vw, 2.2rem); }

  .case-detail__title { font-size: 1.35rem; }
  .case-detail__desc { font-size: 0.9rem; }

  /* Compact page-hero on mobile — balanced: visible content + comfortable hero */
  .page-hero {
    padding: calc(56px + 2.5rem) 0 2.25rem;
  }

  .page-hero h1 {
    font-size: 1.6rem;
    margin-bottom: 0.65rem;
  }

  .page-hero p {
    font-size: 0.9rem;
    line-height: 1.6;
  }

  .page-hero .section-header__label {
    font-size: 0.68rem;
    padding: 0.35rem 0.85rem;
    margin-bottom: 0.85rem;
  }

  /* Compact case filters — horizontal scroll instead of wrapping */
  .case-filters {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    gap: 0.35rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    scrollbar-width: none;
  }

  .case-filters::-webkit-scrollbar {
    display: none;
  }

  .case-filters__group {
    flex-wrap: nowrap;
    flex-shrink: 0;
  }

  .case-filter-btn {
    white-space: nowrap;
    flex-shrink: 0;
    padding: 0.4rem 0.75rem;
    font-size: 0.65rem;
  }

  /* Reduce section gap after page-hero */
  .page-hero + .section {
    padding-top: 1.5rem;
  }
}

/* Small mobile screens */
@media (max-width: 480px) {
  .btn { padding: 0.75rem 1.5rem; font-size: 0.85rem; width: 100%; justify-content: center; }
  .hero__stats { flex-direction: column; }
  .hero__actions { flex-direction: column; }
  .case-filter-btn { padding: 0.35rem 0.6rem; font-size: 0.62rem; }

  .card { padding: 1.75rem; }
  .card__icon { width: 48px; height: 48px; padding: 10px; }

  .case-card__body { padding: 1.25rem 1.5rem 1.5rem; }

  .case-detail__info { padding: 1.5rem; }
  .case-detail__sections { padding: 1.5rem; gap: 1.5rem; }
  .case-detail__tech { padding: 1rem 1.5rem; }
  .case-detail__gallery { padding: 1rem 1.25rem; }

  .section-header { margin-bottom: clamp(2rem, 4vw, 3rem); }

  .contact-info__item { margin-bottom: 1.25rem; }

  /* Slightly smaller page-hero on small mobile */
  .page-hero {
    padding: calc(52px + 2rem) 0 1.75rem;
  }

  .page-hero h1 {
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
  }

  .page-hero p {
    font-size: 0.85rem;
    line-height: 1.5;
  }

  .page-hero + .section {
    padding-top: 1.25rem;
  }
}