/* ============================================================
   DESIGN TOKENS — Advantage IT Brand
   ============================================================ */
:root {
  /* Type Scale */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;

  /* Fonts */
  --font-display: 'Cabinet Grotesk', 'Arial', sans-serif;
  --font-body: 'Satoshi', 'Inter', sans-serif;
}

/* Light mode (default) */
:root, [data-theme="light"] {
  --color-bg:          #f8fafb;
  --color-surface:     #ffffff;
  --color-surface-2:   #f1f5f9;
  --color-border:      #d5dde5;
  --color-divider:     #e2e8f0;
  --color-text:        #0f172a;
  --color-text-muted:  #475569;
  --color-text-faint:  #94a3b8;
  --color-text-inverse:#ffffff;
  --color-primary:     #1470af;
  --color-primary-hover:#0d5a8e;
  --color-primary-dark: #0a3d61;
  --color-accent:      #0069ff;
  --color-accent-hover:#0055d4;
  --color-accent-glow: rgba(0, 105, 255, 0.12);
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.12);
}

/* Dark mode */
[data-theme="dark"] {
  --color-bg:          #0c1220;
  --color-surface:     #131b2e;
  --color-surface-2:   #1a243a;
  --color-border:      #263049;
  --color-divider:     #1e2840;
  --color-text:        #e2e8f0;
  --color-text-muted:  #94a3b8;
  --color-text-faint:  #64748b;
  --color-text-inverse:#0f172a;
  --color-primary:     #4a9fd4;
  --color-primary-hover:#6cb4e0;
  --color-primary-dark: #2d7fb5;
  --color-accent:      #4d8bff;
  --color-accent-hover:#6ba0ff;
  --color-accent-glow: rgba(77, 139, 255, 0.15);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.4);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:          #0c1220;
    --color-surface:     #131b2e;
    --color-surface-2:   #1a243a;
    --color-border:      #263049;
    --color-divider:     #1e2840;
    --color-text:        #e2e8f0;
    --color-text-muted:  #94a3b8;
    --color-text-faint:  #64748b;
    --color-text-inverse:#0f172a;
    --color-primary:     #4a9fd4;
    --color-primary-hover:#6cb4e0;
    --color-primary-dark: #2d7fb5;
    --color-accent:      #4d8bff;
    --color-accent-hover:#6ba0ff;
    --color-accent-glow: rgba(77, 139, 255, 0.15);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.4);
  }
}

/* ============================================================
   GLOBAL
   ============================================================ */
body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
}

a {
  color: var(--color-primary);
  text-decoration: none;
}
a:hover { color: var(--color-primary-hover); }

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: oklch(from var(--color-bg) l c h / 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-divider);
  transition: box-shadow 0.3s var(--ease-out);
}
.site-header.scrolled {
  box-shadow: var(--shadow-sm);
}
.header-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
}
@media (min-width: 768px) {
  .header-inner { padding: var(--space-3) var(--space-8); }
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--color-primary);
  text-decoration: none;
  white-space: nowrap;
}
.logo svg { flex-shrink: 0; }
@media (max-width: 767px) {
  .btn.btn-header-cta { display: none !important; }
}

.header-nav {
  display: none;
  align-items: center;
  gap: var(--space-6);
}
@media (min-width: 768px) {
  .header-nav { display: flex; }
}
.header-nav a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  font-weight: 500;
  transition: color var(--transition-interactive);
}
.header-nav a:hover { color: var(--color-text); }

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.theme-toggle {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  transition: color var(--transition-interactive), background var(--transition-interactive);
}
.theme-toggle:hover {
  background: var(--color-surface-2);
  color: var(--color-text);
}

.mobile-menu-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
}
@media (min-width: 768px) {
  .mobile-menu-btn { display: none; }
}

.mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  top: 56px;
  background: var(--color-bg);
  z-index: 49;
  padding: var(--space-6) var(--space-4);
  flex-direction: column;
  gap: var(--space-4);
}
.mobile-nav.open { display: flex; }
.mobile-nav a {
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-text);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-divider);
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-sm);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-5);
  transition: background var(--transition-interactive),
              color var(--transition-interactive),
              box-shadow var(--transition-interactive),
              transform var(--transition-interactive);
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
}
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--color-accent);
  color: #fff;
  box-shadow: 0 1px 3px rgba(0, 105, 255, 0.25);
}
.btn-primary:hover {
  background: var(--color-accent-hover);
  box-shadow: 0 4px 14px rgba(0, 105, 255, 0.3);
  color: #fff;
  transform: translateY(-1px);
}
.btn-primary:active { transform: translateY(0); }

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.btn-outline:hover {
  background: var(--color-surface-2);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn-lg {
  padding: var(--space-3) var(--space-8);
  font-size: var(--text-base);
  border-radius: var(--radius-lg);
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(var(--space-16), 10vw, var(--space-32)) var(--space-4);
}
.hero-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: grid;
  gap: var(--space-8);
  align-items: center;
}
@media (min-width: 768px) {
  .hero { padding-inline: var(--space-8); }
  .hero-inner { grid-template-columns: 1fr 1fr; gap: var(--space-12); }
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  background: var(--color-accent-glow);
  border: 1px solid oklch(from var(--color-accent) l c h / 0.2);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}

.hero h1 {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}
.hero h1 span {
  color: var(--color-primary);
}

.hero-desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 48ch;
  margin-bottom: var(--space-6);
  line-height: 1.7;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
}

.hero-stats {
  display: flex;
  gap: var(--space-8);
}
.hero-stat {
  text-align: left;
}
.hero-stat-value {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--color-primary);
}
.hero-stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-1);
}

.hero-visual {
  display: none;
  position: relative;
}
@media (min-width: 768px) {
  .hero-visual { display: block; }
}
.hero-graphic {
  width: 100%;
  aspect-ratio: 1;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  position: relative;
  overflow: hidden;
}
.hero-graphic::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 30% 20%, rgba(255,255,255,0.15) 0%, transparent 50%),
    radial-gradient(circle at 70% 80%, rgba(255,255,255,0.1) 0%, transparent 40%);
}

/* Floating cards on hero graphic */
.float-card {
  position: absolute;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-4);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  animation: float 6s ease-in-out infinite;
}
.float-card-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}
.float-card-icon.blue { background: rgba(20, 112, 175, 0.12); }
.float-card-icon.green { background: rgba(34, 197, 94, 0.12); }
.float-card-icon.purple { background: rgba(139, 92, 246, 0.12); }

.float-card-text { font-size: var(--text-xs); font-weight: 600; color: var(--color-text); }
.float-card-sub { font-size: 11px; color: var(--color-text-muted); font-weight: 400; }

.fc-1 { top: 10%; left: -5%; animation-delay: 0s; }
.fc-2 { top: 40%; right: 2%; animation-delay: 2s; }
.fc-3 { bottom: 12%; left: 5%; animation-delay: 4s; }

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* ============================================================
   SECTION COMMONS
   ============================================================ */
.section {
  padding: clamp(var(--space-12), 8vw, var(--space-24)) var(--space-4);
}
@media (min-width: 768px) {
  .section { padding-inline: var(--space-8); }
}
.section-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
}
.section-header {
  text-align: left;
  margin-bottom: clamp(var(--space-8), 4vw, var(--space-12));
}
.section-label {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}
.section-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-text);
}
.section-desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 56ch;
  margin-top: var(--space-3);
}

.alt-bg { background: var(--color-surface); }

/* ============================================================
   SERVICES GRID
   ============================================================ */
.services-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1fr;
}
@media (min-width: 640px) {
  .services-grid { grid-template-columns: 1fr 1fr; }
}
@media (min-width: 1024px) {
  .services-grid { grid-template-columns: 1fr 1fr 1fr; }
}

.service-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: box-shadow var(--transition-interactive), border-color var(--transition-interactive);
}
.service-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
}
.alt-bg .service-card {
  background: var(--color-bg);
}

.service-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: var(--space-4);
}

.service-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-2);
}
.service-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}
.service-card ul {
  list-style: none;
  padding: 0;
  margin-top: var(--space-3);
}
.service-card li {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding: var(--space-1) 0;
  position: relative;
  padding-left: var(--space-5);
}
.service-card li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
}

/* ============================================================
   STATS BAR
   ============================================================ */
.stats-bar {
  background: var(--color-primary-dark);
  padding: var(--space-10) var(--space-4);
}
.stats-grid {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: grid;
  gap: var(--space-6);
  text-align: center;
  grid-template-columns: repeat(2, 1fr);
}
@media (min-width: 768px) {
  .stats-grid { grid-template-columns: repeat(4, 1fr); }
}
.stat-item-value {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  color: #ffffff;
}
.stat-item-label {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.7);
  margin-top: var(--space-1);
}

/* ============================================================
   HOW IT WORKS
   ============================================================ */
.steps-grid {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1fr;
  counter-reset: step;
}
@media (min-width: 768px) {
  .steps-grid { grid-template-columns: repeat(3, 1fr); }
}
.step-card {
  position: relative;
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  counter-increment: step;
}
.step-number {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--color-accent);
  opacity: 0.2;
  margin-bottom: var(--space-2);
}
.step-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-2);
}
.step-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ============================================================
   USE CASES
   ============================================================ */
.usecases-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1fr;
}
@media (min-width: 640px) {
  .usecases-grid { grid-template-columns: 1fr 1fr; }
}
.usecase-card {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
  padding: var(--space-5);
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-divider);
}
.usecase-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: oklch(from var(--color-primary) l c h / 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--color-primary);
}
.usecase-card h3 {
  font-size: var(--text-base);
  font-weight: 700;
  font-family: var(--font-display);
  margin-bottom: var(--space-1);
}
.usecase-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* ============================================================
   WHY US
   ============================================================ */
.why-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1fr;
}
@media (min-width: 640px) {
  .why-grid { grid-template-columns: 1fr 1fr; }
}
@media (min-width: 1024px) {
  .why-grid { grid-template-columns: 1fr 1fr 1fr; }
}
.why-card {
  padding: var(--space-5);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
}
.why-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  margin-bottom: var(--space-2);
}
.why-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ============================================================
   TESTIMONIAL
   ============================================================ */
.testimonial-section {
  background: var(--color-primary);
  color: #fff;
  padding: clamp(var(--space-12), 8vw, var(--space-20)) var(--space-4);
}
.testimonial-inner {
  max-width: var(--content-default);
  margin: 0 auto;
  text-align: center;
}
.testimonial-quote {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 500;
  line-height: 1.5;
  font-style: italic;
  margin-bottom: var(--space-6);
}
.testimonial-author {
  font-size: var(--text-sm);
  opacity: 0.8;
}

/* ============================================================
   INDUSTRIES
   ============================================================ */
.industries-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-6);
}
.industry-tag {
  padding: var(--space-2) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
}
.alt-bg .industry-tag {
  background: var(--color-bg);
}

/* ============================================================
   CTA SECTION
   ============================================================ */
.cta-section {
  padding: clamp(var(--space-16), 10vw, var(--space-32)) var(--space-4);
  text-align: center;
}
.cta-inner {
  max-width: var(--content-default);
  margin: 0 auto;
}
.cta-section h2 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
}
.cta-section p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 48ch;
  margin: 0 auto var(--space-6);
}
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}
.cta-phone {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-primary);
  font-family: var(--font-display);
}
.cta-phone a {
  color: inherit;
  text-decoration: none;
}
.cta-phone a:hover { text-decoration: underline; }

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  border-top: 1px solid var(--color-divider);
  padding: var(--space-8) var(--space-4);
}
.footer-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  align-items: center;
  text-align: center;
}
@media (min-width: 768px) {
  .footer-inner { flex-direction: row; justify-content: space-between; text-align: left; }
}
.footer-brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-base);
  color: var(--color-primary);
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  justify-content: center;
}
.footer-links a {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}
.footer-links a:hover { color: var(--color-text); }
.footer-copy {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

/* ============================================================
   SCROLL REVEAL
   ============================================================ */
.fade-in { opacity: 1; }

@supports (animation-timeline: scroll()) {
  .fade-in {
    opacity: 0;
    animation: reveal-fade linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 100%;
  }
}

@keyframes reveal-fade {
  to { opacity: 1; }
}