/* ══════════════════════════════════════════
   HDR Web Studio — Design System
   Version: 1.0
   ══════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;600&family=Outfit:wght@400;500;600;700;800&display=swap');

/* ── Design Tokens ── */
:root {
  --color-primary: #0A0E1A;
  --color-secondary: #6366F1;
  --color-accent: #22D3EE;
  --color-accent-warm: #F59E0B;
  --color-neutral-light: #F8FAFC;
  --color-neutral-mid: #94A3B8;
  --color-neutral-dark: #1E293B;
  --color-surface: #111827;
  --color-success: #10B981;
  --color-error: #EF4444;

  --gradient-signature: linear-gradient(135deg, #6366F1 0%, #22D3EE 50%, #F59E0B 100%);
  --gradient-text: linear-gradient(90deg, #6366F1, #22D3EE);
  --gradient-card: linear-gradient(180deg, #1E293B 0%, #0A0E1A 100%);
  --gradient-hero: radial-gradient(ellipse at 30% 0%, rgba(99,102,241,0.15) 0%, transparent 60%),
                   radial-gradient(ellipse at 70% 100%, rgba(34,211,238,0.1) 0%, transparent 50%);

  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --font-display: 'Outfit', var(--font-primary);

  --font-xs: 0.75rem;
  --font-sm: 0.875rem;
  --font-base: 1rem;
  --font-lg: 1.125rem;
  --font-xl: 1.25rem;
  --font-2xl: 1.5rem;
  --font-3xl: 1.875rem;
  --font-4xl: 2.25rem;
  --font-5xl: 3rem;
  --font-6xl: 3.75rem;

  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  --border-subtle: 1px solid rgba(148, 163, 184, 0.12);
  --border-accent: 1px solid rgba(99, 102, 241, 0.3);

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px rgba(99, 102, 241, 0.2);
  --shadow-glow-cyan: 0 0 30px rgba(34, 211, 238, 0.15);

  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease-out;
  --transition-spring: 400ms cubic-bezier(0.34, 1.56, 0.64, 1);

  --max-width: 1200px;
  --nav-height: 72px;
}

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

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

body {
  font-family: var(--font-primary);
  font-size: var(--font-base);
  line-height: 1.6;
  color: var(--color-neutral-light);
  background-color: var(--color-primary);
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }

/* ── Typography ── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
}
h1 { font-size: var(--font-6xl); }
h2 { font-size: var(--font-4xl); }
h3 { font-size: var(--font-2xl); }
h4 { font-size: var(--font-xl); }

.text-gradient {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-mono {
  font-family: var(--font-mono);
  font-size: var(--font-sm);
  letter-spacing: 0.05em;
}

.label {
  font-family: var(--font-mono);
  font-size: var(--font-xs);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-accent);
}

/* ── Layout ── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.section {
  padding: var(--space-5xl) 0;
  position: relative;
}

/* ── Navbar ── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  background: rgba(10, 14, 26, 0.75);
  border-bottom: var(--border-subtle);
  transition: background var(--transition-base);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--font-xl);
  letter-spacing: -0.03em;
}

.nav-logo .hdr { color: #fff; }
.nav-logo .glow {
  color: var(--color-accent);
  text-shadow: 0 0 20px rgba(34, 211, 238, 0.5);
}
.nav-logo .studio {
  font-weight: 400;
  color: var(--color-neutral-mid);
  font-size: var(--font-sm);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  margin-left: var(--space-xs);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-2xl);
}

.nav-links a {
  font-size: var(--font-sm);
  font-weight: 500;
  color: var(--color-neutral-mid);
  transition: color var(--transition-base);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-text);
  transition: width var(--transition-slow);
  border-radius: 1px;
}

.nav-links a:hover { color: var(--color-neutral-light); }
.nav-links a:hover::after { width: 100%; }

.nav-cta {
  padding: var(--space-sm) var(--space-lg);
  background: var(--color-secondary);
  color: #fff !important;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: var(--font-sm);
  transition: all var(--transition-base);
  box-shadow: 0 0 0 0 rgba(99, 102, 241, 0);
}

.nav-cta:hover {
  background: #818CF8;
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.4);
  transform: translateY(-1px);
}
.nav-cta::after { display: none !important; }

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-sm);
}
.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--color-neutral-light);
  border-radius: 2px;
  transition: all var(--transition-base);
}

/* ── Hero ── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding-top: var(--nav-height);
  background: var(--gradient-hero);
}

.hero-content {
  max-width: 800px;
}

.hero-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
  padding: var(--space-xs) var(--space-lg);
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: var(--font-xs);
  color: var(--color-secondary);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.hero-label .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-success);
  animation: pulse 2s ease-in-out infinite;
}

.hero h1 {
  margin-bottom: var(--space-xl);
  font-size: clamp(2.5rem, 6vw, var(--font-6xl));
}

.hero h1 .highlight {
  display: inline;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: var(--font-lg);
  color: var(--color-neutral-mid);
  max-width: 600px;
  margin-bottom: var(--space-2xl);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: var(--space-lg);
  align-items: center;
  flex-wrap: wrap;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: var(--font-base);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--color-secondary);
  color: #fff;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}
.btn-primary:hover {
  background: #818CF8;
  box-shadow: 0 6px 25px rgba(99, 102, 241, 0.45);
  transform: translateY(-2px);
}

.btn-ghost {
  background: transparent;
  color: var(--color-neutral-light);
  border: var(--border-subtle);
}
.btn-ghost:hover {
  background: rgba(148, 163, 184, 0.08);
  border-color: rgba(148, 163, 184, 0.3);
}

/* ── Cards ── */
.card {
  background: var(--gradient-card);
  border: var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  transition: all var(--transition-slow);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(99,102,241,0.3), transparent);
  opacity: 0;
  transition: opacity var(--transition-slow);
}

.card:hover {
  border-color: rgba(99, 102, 241, 0.2);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}
.card:hover::before { opacity: 1; }

.card-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-lg);
  background: rgba(99, 102, 241, 0.1);
  color: var(--color-secondary);
  margin-bottom: var(--space-lg);
  font-size: var(--font-2xl);
}

.card h3 { margin-bottom: var(--space-md); }

.card p {
  color: var(--color-neutral-mid);
  font-size: var(--font-sm);
  line-height: 1.7;
}

/* ── Services Grid ── */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

/* ── Portfolio ── */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
}

.portfolio-item {
  border-radius: var(--radius-xl);
  overflow: hidden;
  position: relative;
  aspect-ratio: 16 / 10;
  background: var(--color-neutral-dark);
  border: var(--border-subtle);
  transition: all var(--transition-slow);
  cursor: pointer;
}

.portfolio-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.portfolio-item:hover {
  box-shadow: var(--shadow-glow);
  border-color: rgba(99, 102, 241, 0.3);
}
.portfolio-item:hover img { transform: scale(1.03); }

.portfolio-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-xl);
  background: linear-gradient(transparent, rgba(10, 14, 26, 0.95));
  transform: translateY(20px);
  opacity: 0;
  transition: all var(--transition-slow);
}

.portfolio-item:hover .portfolio-overlay {
  transform: translateY(0);
  opacity: 1;
}

.portfolio-overlay h4 { margin-bottom: var(--space-xs); }
.portfolio-overlay .tag {
  font-family: var(--font-mono);
  font-size: var(--font-xs);
  color: var(--color-accent);
}

/* ── Stats ── */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
  padding: var(--space-3xl) 0;
  border-top: var(--border-subtle);
  border-bottom: var(--border-subtle);
}

.stat {
  text-align: center;
}

.stat-number {
  font-family: var(--font-mono);
  font-size: var(--font-4xl);
  font-weight: 700;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-xs);
}

.stat-label {
  font-size: var(--font-sm);
  color: var(--color-neutral-mid);
}

/* ── Section Header ── */
.section-header {
  max-width: 600px;
  margin-bottom: var(--space-3xl);
}

.section-header .label { margin-bottom: var(--space-md); }
.section-header h2 { margin-bottom: var(--space-lg); }
.section-header p {
  color: var(--color-neutral-mid);
  line-height: 1.7;
}

/* ── CTA Section ── */
.cta-section {
  text-align: center;
  padding: var(--space-5xl) 0;
}

.cta-box {
  background: var(--gradient-card);
  border: var(--border-subtle);
  border-radius: var(--radius-2xl);
  padding: var(--space-4xl) var(--space-3xl);
  position: relative;
  overflow: hidden;
}

.cta-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  height: 1px;
  background: var(--gradient-signature);
}

.cta-box h2 { margin-bottom: var(--space-lg); }
.cta-box p {
  color: var(--color-neutral-mid);
  margin-bottom: var(--space-2xl);
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

/* ── Footer ── */
.footer {
  padding: var(--space-3xl) 0;
  border-top: var(--border-subtle);
}

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

.footer-copy {
  font-size: var(--font-sm);
  color: var(--color-neutral-mid);
}

.footer-links {
  display: flex;
  gap: var(--space-xl);
}

.footer-links a {
  font-size: var(--font-sm);
  color: var(--color-neutral-mid);
  transition: color var(--transition-base);
}
.footer-links a:hover { color: var(--color-neutral-light); }

/* ── Problem / Solution ── */
.problem-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
}

.problem-card,
.solution-card {
  background: var(--gradient-card);
  border: var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl) var(--space-2xl);
}

.problem-card {
  border-color: rgba(239, 68, 68, 0.15);
}

.solution-card {
  border-color: rgba(16, 185, 129, 0.2);
  background: linear-gradient(180deg, rgba(16, 185, 129, 0.05) 0%, #0A0E1A 100%);
}

.problem-icon {
  font-size: 2rem;
  margin-bottom: var(--space-lg);
}

.problem-card h3,
.solution-card h3 {
  margin-bottom: var(--space-lg);
}

.problem-list li,
.solution-list li {
  padding: var(--space-sm) 0;
  padding-left: var(--space-xl);
  position: relative;
  color: var(--color-neutral-mid);
  font-size: var(--font-sm);
  line-height: 1.7;
}

.problem-list li::before {
  content: '✕';
  position: absolute;
  left: 0;
  color: var(--color-error);
  font-weight: 700;
  font-size: var(--font-sm);
}

.solution-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-success);
  font-weight: 700;
  font-size: var(--font-sm);
}

/* ── Process Steps ── */
.process-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.process-step {
  display: flex;
  gap: var(--space-2xl);
  align-items: flex-start;
  padding: var(--space-2xl);
  background: var(--gradient-card);
  border: var(--border-subtle);
  border-radius: var(--radius-xl);
  transition: all var(--transition-slow);
}

.process-step:hover {
  border-color: rgba(99, 102, 241, 0.2);
  box-shadow: var(--shadow-glow);
}

.step-number {
  font-family: var(--font-mono);
  font-size: var(--font-3xl);
  font-weight: 700;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  flex-shrink: 0;
  line-height: 1;
  min-width: 60px;
}

.step-content h3 {
  margin-bottom: var(--space-sm);
}

.step-content p {
  color: var(--color-neutral-mid);
  font-size: var(--font-sm);
  line-height: 1.7;
}

/* ── Features Grid (What you get) ── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

.feature-item {
  display: flex;
  gap: var(--space-lg);
  align-items: flex-start;
  padding: var(--space-xl);
  background: var(--gradient-card);
  border: var(--border-subtle);
  border-radius: var(--radius-lg);
  transition: all var(--transition-slow);
}

.feature-item:hover {
  border-color: rgba(99, 102, 241, 0.15);
}

.feature-check {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: rgba(16, 185, 129, 0.1);
  color: var(--color-success);
  font-weight: 700;
  font-size: var(--font-lg);
  flex-shrink: 0;
}

.feature-item h4 {
  margin-bottom: var(--space-xs);
  font-size: var(--font-base);
}

.feature-item p {
  color: var(--color-neutral-mid);
  font-size: var(--font-sm);
  line-height: 1.6;
}

/* ── Extras (Add-ons) ── */
.extras-section {
  padding-top: var(--space-3xl);
}

.extras-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

.extra-item {
  padding: var(--space-xl);
  background: rgba(30, 41, 59, 0.3);
  border: var(--border-subtle);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all var(--transition-slow);
}

.extra-item:hover {
  background: rgba(30, 41, 59, 0.6);
  border-color: rgba(148, 163, 184, 0.2);
}

.extra-icon {
  font-size: 1.8rem;
  display: block;
  margin-bottom: var(--space-md);
}

.extra-item h4 {
  font-size: var(--font-sm);
  margin-bottom: var(--space-sm);
}

.extra-item p {
  color: var(--color-neutral-mid);
  font-size: var(--font-xs);
  line-height: 1.6;
}

/* ── Animations ── */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-row { grid-template-columns: repeat(2, 1fr); gap: var(--space-2xl); }
  .extras-grid { grid-template-columns: repeat(2, 1fr); }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  h1 { font-size: var(--font-4xl); }
  h2 { font-size: var(--font-3xl); }

  .nav-links { display: none; }
  .nav-toggle { display: flex; }

  .nav-links.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(10, 14, 26, 0.95);
    backdrop-filter: blur(16px);
    padding: var(--space-xl);
    gap: var(--space-lg);
    border-bottom: var(--border-subtle);
  }

  .services-grid { grid-template-columns: 1fr; }
  .portfolio-grid { grid-template-columns: 1fr; }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .problem-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .extras-grid { grid-template-columns: repeat(2, 1fr); }
  .process-step { flex-direction: column; gap: var(--space-lg); }

  .hero-actions { flex-direction: column; align-items: flex-start; }

  .footer .container { flex-direction: column; gap: var(--space-lg); text-align: center; }
  .section { padding: var(--space-4xl) 0; }
}

@media (max-width: 480px) {
  .container { padding: 0 var(--space-lg); }
  .stats-row { grid-template-columns: 1fr 1fr; }
  .extras-grid { grid-template-columns: 1fr; }
}