/* =============================================
   TechTrendMedia — Premium Design System v2.0
   Awwwards-Level UI · Stripe/Linear Inspired
   ============================================= */

/* ---------- CSS Variables (Light Mode) ---------- */
:root {
  /* Colors — refined light palette */
  --bg-primary:#fefcfc;
  --bg-secondary: #f7f8fc;
  --bg-tertiary: #eef1f6;
  --bg-card: #ffffff;
  --bg-card-hover: #fafbff;
  --bg-nav: rgba(255,255,255,0.72);

  --text-primary: #0c0e16;
  --text-secondary: #4b5167;
  --text-tertiary: #8e95a9;
  --text-inverse: #ffffff;

  --accent: #6c5ce7;
  --accent-light: #a29bfe;
  --accent-dark: #5a4bd1;
  --accent-rgb: 108,92,231;
  --accent-glow: rgba(108,92,231,0.10);
  --accent-gradient: linear-gradient(135deg, #6c5ce7 0%, #a855f7 50%, #3b82f6 100%);

  --border: rgba(0,0,0,0.06);
  --border-light: rgba(0,0,0,0.03);
  --border-accent: rgba(108,92,231,0.18);

  --shadow-xs: 0 1px 2px rgba(0,0,0,0.03);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.06);
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.08);
  --shadow-xl: 0 24px 64px rgba(0,0,0,0.10);
  --shadow-glow: 0 0 40px rgba(108,92,231,0.12);
  --shadow-glow-lg: 0 0 80px rgba(108,92,231,0.18);

  /* Typography */
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: 'Outfit', 'Inter', sans-serif;

  /* Spacing */
  --section-padding: clamp(80px, 10vw, 140px) 0;
  --container-width: 1200px;
  --gap: clamp(16px, 2.5vw, 32px);

  /* Radii */
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-full: 9999px;

  /* Transitions */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --t-fast: 0.18s;
  --t-normal: 0.3s;
  --t-slow: 0.5s;
  --t-slower: 0.7s;
}

/* ---------- Dark Mode ---------- */
[data-theme="dark"] {
  --bg-primary: #05091e;
  --bg-secondary: #0a0f1e;
  --bg-tertiary: #111631;
  --bg-card: rgba(17,22,49,0.7);
  --bg-card-hover: rgba(26,32,60,0.8);
  --bg-nav: rgba(5,8,22,0.78);

  --text-primary: #f1f3f9;
  --text-secondary: #b0b8d1;
  --text-tertiary: #5c6484;

  --accent: #818cf8;
  --accent-light: #a5b4fc;
  --accent-dark: #6366f1;
  --accent-rgb: 129,140,248;
  --accent-glow: rgba(129,140,248,0.12);
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 40%, #06b6d4 100%);

  --border: rgba(255,255,255,0.06);
  --border-light: rgba(255,255,255,0.03);
  --border-accent: rgba(129,140,248,0.2);

  --shadow-xs: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.35);
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.4);
  --shadow-xl: 0 24px 64px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 50px rgba(129,140,248,0.12);
  --shadow-glow-lg: 0 0 100px rgba(129,140,248,0.2);
}

/* ---------- Selection ---------- */
::selection {
  background: rgba(var(--accent-rgb), 0.2);
  color: var(--accent);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  color: var(--text-primary);
  background: var(--bg-primary);
  line-height: 1.7;
  overflow-x: hidden;
  transition: background var(--t-slow) var(--ease), color var(--t-slow) var(--ease);
}

a {
  text-decoration: none;
  color: inherit;
  transition: color var(--t-fast) var(--ease);
}
img { max-width: 100%; display: block; }
ul { list-style: none; }
button { font-family: var(--font-body); }

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 clamp(16px, 4vw, 32px);
}

/* ---------- Scroll Progress Bar ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: var(--accent-gradient);
  z-index: 10000;
  transition: none;
  border-radius: 0 2px 2px 0;
}
.scroll-progress::after {
  content: '';
  position: absolute;
  right: 0;
  top: 0;
  width: 80px;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(var(--accent-rgb), 0.5));
  filter: blur(3px);
}

/* ---------- Section Base ---------- */
.section {
  padding: var(--section-padding);
  position: relative;
}
.section--alt {
  background: var(--bg-secondary);
}

.section__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: var(--accent-glow);
  color: var(--accent);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 24px;
}
.section__badge svg { width: 14px; height: 14px; }

.section__title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  font-weight: 800;
  line-height: 1.12;
  margin-bottom: 20px;
  color: var(--text-primary);
  letter-spacing: -0.03em;
}

.section__subtitle {
  font-size: clamp(1rem, 1.5vw, 1.15rem);
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.75;
}

.section__header {
  text-align: center;
  margin-bottom: clamp(48px, 6vw, 80px);
}
.section__header .section__subtitle {
  margin: 0 auto;
}

/* ---------- Animations ---------- */
.reveal {
  opacity: 0;
  transform: translateY(50px);
  transition: opacity var(--t-slower) var(--ease-out), transform var(--t-slower) var(--ease-out);
}
.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.08s; }
.reveal-delay-2 { transition-delay: 0.16s; }
.reveal-delay-3 { transition-delay: 0.24s; }
.reveal-delay-4 { transition-delay: 0.32s; }
.reveal-delay-5 { transition-delay: 0.40s; }

/* Ripple effect */
.btn-ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255,255,255,0.35);
  transform: scale(0);
  animation: ripple-anim 0.6s linear;
  pointer-events: none;
}
@keyframes ripple-anim {
  to { transform: scale(4); opacity: 0; }
}

/* ---------- NAVBAR ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 20px 0;
  transition: all var(--t-normal) var(--ease);
}
.navbar.scrolled {
  background: var(--bg-nav);
  backdrop-filter: blur(24px) saturate(1.6);
  -webkit-backdrop-filter: blur(24px) saturate(1.6);
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar__logo {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}
.navbar__logo span {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.navbar__menu {
  display: flex;
  align-items: center;
  gap: 8px;
}

.navbar__link {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  transition: all var(--t-fast) var(--ease);
}
.navbar__link::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transition: width var(--t-normal) var(--ease-spring);
}
.navbar__link:hover {
  color: var(--accent);
}
.navbar__link:hover::after {
  width: 20px;
}
.navbar__link.active {
  color: var(--accent);
  background: var(--accent-glow);
}
.navbar__link.active::after {
  width: 20px;
}

.navbar__actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.theme-toggle {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-card);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--t-normal) var(--ease);
  color: var(--text-secondary);
  position: relative;
  overflow: hidden;
}
.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: var(--shadow-glow);
  transform: rotate(15deg);
}
.theme-toggle svg {
  width: 18px;
  height: 18px;
  transition: transform var(--t-normal) var(--ease-spring);
}
.theme-toggle .icon-moon { display: none; }
[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
[data-theme="dark"] .theme-toggle .icon-moon { display: block; }

/* Hamburger */
.navbar__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  z-index: 1001;
  background: none;
  border: none;
  padding: 4px;
}
.navbar__hamburger span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--t-normal) var(--ease);
  transform-origin: center;
}
.navbar__hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.navbar__hamburger.active span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.navbar__hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Overlay */
.menu-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  backdrop-filter: blur(4px);
  z-index: 998;
  opacity: 0;
  visibility: hidden;
  transition: all var(--t-normal) var(--ease);
}
.menu-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* ---------- HERO ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 100px;
  padding-bottom: 60px;
}

.hero__bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  z-index: 0;
}

/* Grid pattern overlay */
.hero__bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(var(--accent-rgb), 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(var(--accent-rgb), 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  z-index: 1;
}

/* Radial fade on grid */
.hero__bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 30%, var(--bg-primary) 80%);
  z-index: 2;
}

.hero__gradient {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  will-change: transform;
}

.hero__gradient--1 {
  width: 700px;
  height: 700px;
  top: -250px;
  right: -150px;
  background: radial-gradient(circle, #6c5ce7, #a855f7);
  opacity: 0.18;
  animation: heroFloat1 22s ease-in-out infinite;
}
.hero__gradient--2 {
  width: 600px;
  height: 600px;
  bottom: -200px;
  left: -100px;
  background: radial-gradient(circle, #8b5cf6, #ec4899);
  opacity: 0.14;
  animation: heroFloat2 26s ease-in-out infinite;
}
.hero__gradient--3 {
  width: 500px;
  height: 500px;
  top: 40%;
  left: 40%;
  background: radial-gradient(circle, #06b6d4, #3b82f6);
  opacity: 0.10;
  animation: heroFloat3 20s ease-in-out infinite;
}

[data-theme="dark"] .hero__gradient--1 { opacity: 0.12; }
[data-theme="dark"] .hero__gradient--2 { opacity: 0.10; }
[data-theme="dark"] .hero__gradient--3 { opacity: 0.08; }

@keyframes heroFloat1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25% { transform: translate(40px, -50px) scale(1.08); }
  50% { transform: translate(-20px, 40px) scale(0.95); }
  75% { transform: translate(50px, 20px) scale(1.03); }
}
@keyframes heroFloat2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(-40px, -30px) scale(1.1); }
  66% { transform: translate(30px, 50px) scale(0.92); }
}
@keyframes heroFloat3 {
  0%, 100% { transform: translate(-50%, -50%) scale(1); }
  50% { transform: translate(calc(-50% + 60px), calc(-50% - 40px)) scale(1.15); }
}

.hero__content {
  position: relative;
  z-index: 3;
  max-width: 760px;
}

.hero__overline {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 24px;
  background: var(--accent-glow);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 32px;
  letter-spacing: 0.03em;
  backdrop-filter: blur(10px);
}
.hero__overline .pulse {
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
  box-shadow: 0 0 10px rgba(var(--accent-rgb), 0.5);
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); box-shadow: 0 0 0 0 rgba(var(--accent-rgb), 0.4); }
  50% { opacity: 0.7; transform: scale(1.4); box-shadow: 0 0 0 8px rgba(var(--accent-rgb), 0); }
}

.hero__title {
  font-family: var(--font-heading);
  font-size: clamp(2.8rem, 6.5vw, 4.8rem);
  font-weight: 900;
  line-height: 1.06;
  margin-bottom: 28px;
  letter-spacing: -0.04em;
}

.hero__description {
  font-size: clamp(1.05rem, 1.5vw, 1.2rem);
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 44px;
  max-width: 560px;
}

.hero__buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 60px;
}

/* Trust Stats */
.hero__stats {
  display: flex;
  gap: clamp(32px, 4vw, 56px);
  padding-top: 40px;
  border-top: 1px solid var(--border);
}
.hero__stat {
  text-align: left;
}
.hero__stat-number {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.03em;
  line-height: 1.2;
}
.hero__stat-number span {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero__stat-label {
  font-size: 0.82rem;
  color: var(--text-tertiary);
  font-weight: 500;
  margin-top: 4px;
  letter-spacing: 0.02em;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 15px 34px;
  border-radius: var(--radius);
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--t-normal) var(--ease);
  font-family: var(--font-body);
  position: relative;
  overflow: hidden;
  letter-spacing: 0.01em;
}
.btn svg { width: 18px; height: 18px; transition: transform var(--t-fast) var(--ease); }
.btn:hover svg { transform: translateX(3px); }

.btn--primary {
  background: var(--accent-gradient);
  color: #fff;
  box-shadow: 0 4px 24px rgba(var(--accent-rgb), 0.3), 0 0 0 0 rgba(var(--accent-rgb), 0);
}
.btn--primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(var(--accent-rgb), 0.35), 0 0 60px rgba(var(--accent-rgb), 0.15);
}
.btn--primary:active {
  transform: translateY(-1px);
}

.btn--outline {
  background: transparent;
  color: var(--text-primary);
  border: 1.5px solid var(--border);
  backdrop-filter: blur(10px);
}
.btn--outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow);
  background: var(--accent-glow);
}

/* ---------- ABOUT ---------- */
.about__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap);
}

.about__card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: clamp(32px, 3vw, 44px) clamp(24px, 2.5vw, 36px);
  transition: all var(--t-normal) var(--ease);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
}
.about__card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-gradient);
  opacity: 0;
  transition: opacity var(--t-normal) var(--ease);
}
.about__card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  border-color: var(--border-accent);
}
.about__card:hover::before { opacity: 1; }

.about__icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius);
  background: var(--accent-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  color: var(--accent);
  transition: all var(--t-normal) var(--ease-spring);
}
.about__card:hover .about__icon {
  background: var(--accent);
  color: #fff;
  transform: scale(1.1) rotate(-5deg);
  box-shadow: 0 8px 24px rgba(var(--accent-rgb), 0.3);
}
.about__icon svg { width: 26px; height: 26px; }

.about__card h3 {
  font-family: var(--font-heading);
  font-size: clamp(1.1rem, 1.5vw, 1.25rem);
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}
.about__card p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* ---------- SERVICES ---------- */
.services__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap);
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: clamp(28px, 3vw, 40px) clamp(24px, 2.5vw, 34px);
  transition: all var(--t-normal) var(--ease);
  position: relative;
  overflow: hidden;
  cursor: default;
  backdrop-filter: blur(10px);
}

/* Gradient border on hover */
.service-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  padding: 1.5px;
  background: var(--accent-gradient);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity var(--t-normal) var(--ease);
}

/* Glow background */
.service-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 0%, rgba(var(--accent-rgb), 0.08), transparent 70%);
  opacity: 0;
  transition: opacity var(--t-slow) var(--ease);
  z-index: 0;
  border-radius: var(--radius-lg);
}

.service-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-xl), var(--shadow-glow);
  border-color: transparent;
}
.service-card:hover::before { opacity: 1; }
.service-card:hover::after { opacity: 1; }

.service-card__inner {
  position: relative;
  z-index: 1;
}

.service-card__icon {
  width: 54px;
  height: 54px;
  border-radius: var(--radius);
  background: var(--accent-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  color: var(--accent);
  transition: all var(--t-normal) var(--ease-spring);
}
.service-card:hover .service-card__icon {
  background: var(--accent);
  color: #fff;
  transform: scale(1.15) rotate(-8deg);
  box-shadow: 0 8px 24px rgba(var(--accent-rgb), 0.3);
}
.service-card__icon svg { width: 24px; height: 24px; }

.service-card__title {
  font-family: var(--font-heading);
  font-size: clamp(1.1rem, 1.3vw, 1.2rem);
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-primary);
}
.service-card__desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 16px;
}

.service-card__details {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.5s var(--ease-out), opacity var(--t-normal);
  opacity: 0;
}
.service-card:hover .service-card__details {
  max-height: 200px;
  opacity: 1;
}
.service-card__details ul {
  padding-top: 16px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.service-card__details li {
  font-size: 0.75rem;
  padding: 5px 14px;
  background: var(--accent-glow);
  color: var(--accent);
  border-radius: var(--radius-full);
  font-weight: 600;
  border: 1px solid var(--border-accent);
}

/* ---------- PHILOSOPHY ---------- */
.philosophy__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap);
}

.philosophy__card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: clamp(32px, 3vw, 44px) clamp(24px, 2.5vw, 36px);
  transition: all var(--t-normal) var(--ease);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
}
.philosophy__card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  border-color: var(--border-accent);
}

.philosophy__number {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 3.5vw, 3.5rem);
  font-weight: 900;
  line-height: 1;
  margin-bottom: 20px;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  opacity: 0.3;
  transition: opacity var(--t-normal) var(--ease);
}
.philosophy__card:hover .philosophy__number { opacity: 0.7; }

.philosophy__card h3 {
  font-family: var(--font-heading);
  font-size: clamp(1.1rem, 1.3vw, 1.2rem);
  font-weight: 700;
  margin-bottom: 12px;
}
.philosophy__card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* ---------- PROJECTS ---------- */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap);
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--t-normal) var(--ease);
  cursor: default;
  backdrop-filter: blur(10px);
}
.project-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-xl), var(--shadow-glow);
  border-color: var(--border-accent);
}

.project-card__image {
  width: 100%;
  height: 240px;
  background: var(--bg-tertiary);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.project-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.7s var(--ease-out), filter 0.5s var(--ease);
}
.project-card:hover .project-card__image img {
  transform: scale(1.1);
  filter: brightness(0.7);
}

.project-card__placeholder {
  color: var(--accent);
  opacity: 0.2;
}
.project-card__placeholder svg { width: 48px; height: 48px; }

.project-card__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.85) 0%, rgba(0,0,0,0.2) 50%, transparent 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  padding: 28px 24px;
  opacity: 0;
  transition: opacity var(--t-normal) var(--ease);
}
.project-card:hover .project-card__overlay { opacity: 1; }

.project-card__overlay-title {
  color: #fff;
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 4px;
  transform: translateY(10px);
  transition: transform var(--t-normal) var(--ease-out);
}
.project-card:hover .project-card__overlay-title { transform: translateY(0); }

.project-card__overlay-cat {
  color: rgba(255,255,255,0.7);
  font-size: 0.78rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 14px;
  transform: translateY(10px);
  transition: transform var(--t-normal) var(--ease-out) 0.05s;
}
.project-card:hover .project-card__overlay-cat { transform: translateY(0); }

.project-card__overlay span {
  color: #fff;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 8px 20px;
  background: rgba(255,255,255,0.12);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-full);
  transform: translateY(10px);
  transition: all var(--t-normal) var(--ease-out) 0.1s;
}
.project-card:hover .project-card__overlay span { transform: translateY(0); }
.project-card__overlay span:hover {
  background: rgba(255,255,255,0.25);
}

.project-card__body { padding: 24px; }
.project-card__category {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}
.project-card__title {
  font-family: var(--font-heading);
  font-size: 1.12rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}
.project-card__desc {
  font-size: 0.86rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ---------- TESTIMONIALS ---------- */
.testimonials__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--gap);
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: clamp(28px, 3vw, 40px);
  transition: all var(--t-normal) var(--ease);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
}

/* Large quote mark decoration */
.testimonial-card::before {
  content: '\201C';
  position: absolute;
  top: 16px;
  right: 24px;
  font-family: var(--font-heading);
  font-size: 6rem;
  line-height: 1;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  opacity: 0.08;
  pointer-events: none;
}

.testimonial-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  border-color: var(--border-accent);
}

.testimonial-card__stars {
  display: flex;
  gap: 3px;
  margin-bottom: 20px;
  color: #f59e0b;
}
.testimonial-card__stars svg {
  width: 16px;
  height: 16px;
  filter: drop-shadow(0 0 4px rgba(245,158,11,0.3));
  animation: starShimmer 2s ease-in-out infinite;
}
.testimonial-card__stars svg:nth-child(2) { animation-delay: 0.15s; }
.testimonial-card__stars svg:nth-child(3) { animation-delay: 0.3s; }
.testimonial-card__stars svg:nth-child(4) { animation-delay: 0.45s; }
.testimonial-card__stars svg:nth-child(5) { animation-delay: 0.6s; }

@keyframes starShimmer {
  0%, 100% { filter: drop-shadow(0 0 4px rgba(245,158,11,0.3)); }
  50% { filter: drop-shadow(0 0 8px rgba(245,158,11,0.6)); }
}

.testimonial-card__text {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: 28px;
  font-style: italic;
  position: relative;
}

.testimonial-card__author {
  display: flex;
  align-items: center;
  gap: 14px;
}
.testimonial-card__avatar {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--accent-glow);
  border: 2px solid var(--border-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: var(--accent);
  font-size: 1.1rem;
  font-family: var(--font-heading);
  flex-shrink: 0;
}
.testimonial-card__name {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-primary);
}
.testimonial-card__role {
  font-size: 0.8rem;
  color: var(--text-tertiary);
  margin-top: 3px;
}

/* ---------- CONTACT ---------- */
.contact__wrapper {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: clamp(32px, 4vw, 56px);
  align-items: start;
}

.contact__info h3 {
  font-family: var(--font-heading);
  font-size: clamp(1.3rem, 2vw, 1.6rem);
  font-weight: 700;
  margin-bottom: 16px;
}
.contact__info > p {
  color: var(--text-secondary);
  margin-bottom: 36px;
  line-height: 1.75;
  font-size: 0.95rem;
}

.contact__detail {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
  color: var(--text-secondary);
  font-size: 0.92rem;
  transition: color var(--t-fast) var(--ease);
}
.contact__detail:hover {
  color: var(--text-primary);
}
.contact__detail-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius);
  background: var(--accent-glow);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all var(--t-normal) var(--ease);
  border: 1px solid var(--border-accent);
}
.contact__detail:hover .contact__detail-icon {
  background: var(--accent);
  color: #fff;
  transform: scale(1.05);
  box-shadow: 0 6px 20px rgba(var(--accent-rgb), 0.25);
}
.contact__detail-icon svg { width: 20px; height: 20px; }

.contact__socials {
  display: flex;
  gap: 10px;
  margin-top: 32px;
}
.contact__social-link {
  width: 46px;
  height: 46px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--t-normal) var(--ease);
}
.contact__social-link:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  transform: translateY(-4px) scale(1.05);
  box-shadow: 0 8px 24px rgba(var(--accent-rgb), 0.3);
}
.contact__social-link svg { width: 18px; height: 18px; }

.whatsapp-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 24px;
  padding: 14px 30px;
  background: linear-gradient(135deg, #25D366, #128C7E);
  color: #fff;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.9rem;
  transition: all var(--t-normal) var(--ease);
  box-shadow: 0 4px 20px rgba(37,211,102,0.2);
  position: relative;
  overflow: hidden;
}
.whatsapp-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.1);
  opacity: 0;
  transition: opacity var(--t-fast);
}
.whatsapp-btn:hover::before { opacity: 1; }
.whatsapp-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(37,211,102,0.35);
}
.whatsapp-btn svg { width: 20px; height: 20px; }

/* Contact Form */
.contact__form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: clamp(28px, 3vw, 40px);
  backdrop-filter: blur(10px);
}

.form__group {
  margin-bottom: 24px;
  position: relative;
}

.form__label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
  letter-spacing: 0.02em;
}

.form__input, .form__textarea {
  width: 100%;
  padding: 15px 18px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.92rem;
  transition: all var(--t-normal) var(--ease);
  outline: none;
}
.form__input::placeholder,
.form__textarea::placeholder {
  color: var(--text-tertiary);
}

.form__input:focus, .form__textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(var(--accent-rgb), 0.08), var(--shadow-glow);
}
.form__textarea {
  min-height: 140px;
  resize: vertical;
}

.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form__submit {
  width: 100%;
  padding: 16px;
  background: var(--accent-gradient);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--t-normal) var(--ease);
  font-family: var(--font-body);
  position: relative;
  overflow: hidden;
  letter-spacing: 0.02em;
}
.form__submit:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 35px rgba(var(--accent-rgb), 0.35);
}
.form__submit:active {
  transform: translateY(-1px);
}
.form__submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.form__message {
  padding: 14px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 500;
  margin-top: 16px;
  display: none;
}
.form__message--success {
  display: block;
  background: rgba(16,185,129,0.08);
  color: #10b981;
  border: 1px solid rgba(16,185,129,0.15);
}
.form__message--error {
  display: block;
  background: rgba(239,68,68,0.08);
  color: #ef4444;
  border: 1px solid rgba(239,68,68,0.15);
}

/* ---------- FOOTER ---------- */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 56px 0 40px;
  position: relative;
}
.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--accent-gradient);
  opacity: 0.4;
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}
.footer__logo {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}
.footer__logo span {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.footer__text {
  font-size: 0.85rem;
  color: var(--text-tertiary);
}

.footer__links {
  display: flex;
  gap: 28px;
}
.footer__link {
  font-size: 0.85rem;
  color: var(--text-tertiary);
  font-weight: 500;
  position: relative;
  transition: color var(--t-fast) var(--ease);
}
.footer__link::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--accent);
  transition: width var(--t-normal) var(--ease-spring);
  border-radius: 2px;
}
.footer__link:hover {
  color: var(--accent);
}
.footer__link:hover::after {
  width: 100%;
}

/* ---------- BACK TO TOP ---------- */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  border-radius: var(--radius);
  background: var(--accent-gradient);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: none;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px) scale(0.8);
  transition: all var(--t-normal) var(--ease-spring);
  box-shadow: 0 8px 30px rgba(var(--accent-rgb), 0.3);
  z-index: 999;
}
.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}
.back-to-top:hover {
  transform: translateY(-4px) scale(1.08);
  box-shadow: 0 12px 40px rgba(var(--accent-rgb), 0.4);
}
.back-to-top svg { width: 20px; height: 20px; }

/* ---------- Card Tilt (JS-controlled) ---------- */
.tilt-card {
  transform-style: preserve-3d;
  will-change: transform;
}
.tilt-card > * {
  transform: translateZ(20px);
}

/* ---------- RESPONSIVE ---------- */
@media (max-width: 1024px) {
  .services__grid,
  .projects__grid,
  .about__grid,
  .philosophy__grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero__stats {
    gap: 28px;
  }
}

@media (max-width: 768px) {
  :root { --section-padding: clamp(60px, 8vw, 80px) 0; }

  .navbar__menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 300px;
    height: 100vh;
    height: 100dvh;
    background: var(--bg-primary);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 8px;
    border-left: 1px solid var(--border);
    transition: right var(--t-normal) var(--ease-out);
    box-shadow: var(--shadow-xl);
    z-index: 999;
    backdrop-filter: blur(20px);
  }
  .navbar__menu.open {
    right: 0;
  }
  .navbar__link {
    font-size: 1.1rem;
    padding: 12px 32px;
    width: 80%;
    text-align: center;
    border-radius: var(--radius-sm);
  }
  .navbar__link.active {
    background: var(--accent-glow);
  }
  .navbar__hamburger { display: flex; }

  .hero__title {
    font-size: clamp(2.2rem, 8vw, 3.2rem);
  }
  .hero__content {
    text-align: center;
    max-width: 100%;
  }
  .hero__overline {
    margin-left: auto;
    margin-right: auto;
  }
  .hero__description {
    margin-left: auto;
    margin-right: auto;
  }
  .hero__buttons {
    justify-content: center;
  }
  .hero__stats {
    justify-content: center;
    flex-wrap: wrap;
    gap: 24px 40px;
  }
  .hero__stat {
    text-align: center;
  }

  .services__grid,
  .projects__grid,
  .about__grid,
  .philosophy__grid {
    grid-template-columns: 1fr;
  }
  .testimonials__grid {
    grid-template-columns: 1fr;
  }
  .contact__wrapper {
    grid-template-columns: 1fr;
  }
  .form__row {
    grid-template-columns: 1fr;
  }
  .hero__buttons {
    flex-direction: column;
  }
  .hero__buttons .btn {
    text-align: center;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .hero {
    min-height: calc(100vh - 60px);
    min-height: calc(100dvh - 60px);
  }
  .footer__inner {
    flex-direction: column;
    text-align: center;
  }
  .footer__links {
    justify-content: center;
    flex-wrap: wrap;
  }
  .hero__stats {
    flex-direction: column;
    gap: 16px;
    align-items: center;
  }
}

/* ---------- Smooth theme transition ---------- */
body,
.navbar,
.about__card,
.service-card,
.philosophy__card,
.project-card,
.testimonial-card,
.contact__form,
.footer,
.form__input,
.form__textarea,
.theme-toggle,
.contact__detail-icon,
.contact__social-link,
.back-to-top {
  transition-property: background-color, border-color, color, box-shadow;
  transition-duration: var(--t-slow);
  transition-timing-function: var(--ease);
}

/* ---------- Noise texture overlay for hero (subtle) ---------- */
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 1;
  opacity: 0.5;
}