/* ==========================================================================
   AML (Ai. Make. Learn) - Apple Studio Premium Design System
   Designed for Alex Lee (이진영) | Light Studio Mode & Dynamic Edge
   ========================================================================== */

@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard/dist/web/static/pretendard.css');
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  /* Apple Studio Light Mode Palette */
  --bg-primary: #FBFBFD;
  --bg-secondary: #F5F5F7;
  --bg-tertiary: #FFFFFF;
  
  --text-primary: #1D1D1F;
  --text-secondary: #515154;
  --text-muted: #86868B;
  
  --apple-blue: #0071E3;
  --apple-blue-hover: #0077ED;
  --apple-cyan: #06B6D4;
  --apple-indigo: #4F46E5;
  --apple-emerald: #10B981;
  
  --border-light: rgba(0, 0, 0, 0.08);
  --border-medium: rgba(0, 0, 0, 0.14);
  --border-active: rgba(0, 113, 227, 0.4);
  
  --glass-bg: rgba(255, 255, 255, 0.75);
  --glass-border: rgba(255, 255, 255, 0.8);
  --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.04);
  
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  
  --font-sans: 'Pretendard', 'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  --ease-apple: cubic-bezier(0.25, 1, 0.5, 1);
  --ease-spring: cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* --------------------------------------------------------------------------
   Korean Typography & Reset Rules (MANDATORY)
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  letter-spacing: -0.015em;
  /* NON-NEGOTIABLE Korean Word Wrapping Rule */
  word-break: keep-all;
  overflow-wrap: break-word;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --------------------------------------------------------------------------
   Typography Scale (Fluid clamp)
   -------------------------------------------------------------------------- */
h1, h2, h3, h4, .display-hero {
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.08;
  color: var(--text-primary);
}

.display-hero {
  font-size: clamp(2.8rem, 6.5vw, 5.5rem);
  letter-spacing: -0.04em;
}

.heading-xl {
  font-size: clamp(2.2rem, 4.5vw, 3.8rem);
}

.heading-lg {
  font-size: clamp(1.8rem, 3vw, 2.5rem);
}

.heading-md {
  font-size: clamp(1.3rem, 2vw, 1.75rem);
}

.text-body-lg {
  font-size: clamp(1.05rem, 1.2vw, 1.3rem);
  color: var(--text-secondary);
  line-height: 1.65;
}

.text-mono {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* Gradient Text Effect (Apple Style) */
.text-gradient-apple {
  background: linear-gradient(135deg, #1D1D1F 0%, #0071E3 50%, #06B6D4 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-gradient-blue {
  background: linear-gradient(135deg, #0071E3 0%, #4F46E5 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* --------------------------------------------------------------------------
   Components & Glassmorphism
   -------------------------------------------------------------------------- */
.glass-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(251, 251, 253, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-light);
  transition: all 0.3s var(--ease-apple);
}

.glass-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.03);
  transition: transform 0.4s var(--ease-apple), box-shadow 0.4s var(--ease-apple), border-color 0.4s var(--ease-apple);
  position: relative;
  overflow: hidden;
}

.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.08);
  border-color: rgba(0, 113, 227, 0.25);
}

/* Button Component */
.btn-apple-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background-color: var(--apple-blue);
  color: #FFFFFF;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.8rem 1.6rem;
  border-radius: 9999px;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.3s var(--ease-apple);
  box-shadow: 0 4px 14px rgba(0, 113, 227, 0.3);
}

.btn-apple-primary:hover {
  background-color: var(--apple-blue-hover);
  transform: scale(1.02);
  box-shadow: 0 6px 20px rgba(0, 113, 227, 0.4);
}

.btn-apple-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.8rem 1.6rem;
  border-radius: 9999px;
  border: 1px solid var(--border-light);
  cursor: pointer;
  text-decoration: none;
  transition: all 0.3s var(--ease-apple);
}

.btn-apple-secondary:hover {
  background-color: #E8E8ED;
  border-color: var(--border-medium);
  transform: scale(1.02);
}

/* Badge pills */
.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.9rem;
  border-radius: 9999px;
  font-size: 0.8rem;
  font-weight: 600;
  background: rgba(0, 113, 227, 0.08);
  color: var(--apple-blue);
  border: 1px solid rgba(0, 113, 227, 0.15);
}

/* --------------------------------------------------------------------------
   Draft Switcher Bar (5 초안 실시간 선택기)
   -------------------------------------------------------------------------- */
.draft-switcher-bar {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  background: rgba(29, 29, 31, 0.9);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  padding: 6px 10px;
  border-radius: 9999px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.25);
  display: flex;
  align-items: center;
  gap: 6px;
  max-width: 95vw;
  overflow-x: auto;
}

.draft-switcher-title {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 0 10px;
  text-transform: uppercase;
  white-space: nowrap;
}

.draft-btn {
  background: transparent;
  border: none;
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.82rem;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: 9999px;
  cursor: pointer;
  transition: all 0.25s var(--ease-apple);
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 6px;
}

.draft-btn:hover {
  color: #FFFFFF;
  background: rgba(255, 255, 255, 0.15);
}

.draft-btn.active {
  background: var(--apple-blue);
  color: #FFFFFF;
  font-weight: 700;
  box-shadow: 0 2px 10px rgba(0, 113, 227, 0.5);
}

/* --------------------------------------------------------------------------
   5 Draft Theme Variations
   -------------------------------------------------------------------------- */
/* Draft 1: Apple Keynote Mode (Default Crisp Studio) */
body[data-draft="1"] {
  --bg-primary: #FBFBFD;
  --bg-secondary: #F5F5F7;
  --bg-tertiary: #FFFFFF;
}

/* Draft 2: Bionic Bento Matrix */
body[data-draft="2"] {
  --bg-primary: #F0F2F5;
  --bg-secondary: #E4E7EB;
  --bg-tertiary: #FFFFFF;
}
body[data-draft="2"] .glass-card {
  border-radius: var(--radius-xl);
  border: 1px solid rgba(0, 113, 227, 0.12);
}

/* Draft 3: Minimal Studio Gallery */
body[data-draft="3"] {
  --bg-primary: #FAFAFA;
  --bg-secondary: #F0F0F0;
  --bg-tertiary: #FFFFFF;
}
body[data-draft="3"] .glass-card {
  border-radius: 0px;
  border: 1px solid var(--text-primary);
}
body[data-draft="3"] .btn-apple-primary {
  border-radius: 0px;
  background: var(--text-primary);
}

/* Draft 4: Futuristic Kinetic Canvas */
body[data-draft="4"] {
  --bg-primary: #F4F7FA;
  --bg-secondary: #E8EEF5;
  --bg-tertiary: #FFFFFF;
}
body[data-draft="4"] .glass-card {
  box-shadow: 0 8px 30px rgba(6, 182, 212, 0.08);
  border: 1px solid rgba(6, 182, 212, 0.2);
}

/* Draft 5: Executive Solution Portal */
body[data-draft="5"] {
  --bg-primary: #F8F9FA;
  --bg-secondary: #EEF2F6;
  --bg-tertiary: #FFFFFF;
}
body[data-draft="5"] .glass-header {
  background: rgba(255, 255, 255, 0.95);
}

/* --------------------------------------------------------------------------
   Canvas Background Container
   -------------------------------------------------------------------------- */
#bg-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  opacity: 0.6;
}

.content-wrapper {
  position: relative;
  z-index: 1;
}

/* --------------------------------------------------------------------------
   Section Layout & Spacing
   -------------------------------------------------------------------------- */
.section-padding {
  padding: clamp(64px, 10vw, 120px) 0;
}

.container-apple {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* --------------------------------------------------------------------------
   Bento Grid Systems
   -------------------------------------------------------------------------- */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 20px;
}

.bento-span-4 { grid-column: span 4; }
.bento-span-6 { grid-column: span 6; }
.bento-span-8 { grid-column: span 8; }
.bento-span-12 { grid-column: span 12; }

@media (max-width: 991px) {
  .bento-span-4, .bento-span-6, .bento-span-8 {
    grid-column: span 12;
  }
}

/* --------------------------------------------------------------------------
   Interactive Service Cards (4 Focus Services)
   -------------------------------------------------------------------------- */
.service-card {
  padding: 40px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 380px;
  cursor: pointer;
}

.service-card-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: rgba(0, 113, 227, 0.08);
  color: var(--apple-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 24px;
}

.service-visual-box {
  margin-top: 24px;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 16px;
  min-height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-light);
}

/* --------------------------------------------------------------------------
   Modal & Contact Form
   -------------------------------------------------------------------------- */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 10000;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s var(--ease-apple);
  padding: 20px;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  background: var(--bg-tertiary);
  border-radius: var(--radius-xl);
  max-width: 680px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  padding: 40px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.15);
  border: 1px solid var(--border-light);
  transform: scale(0.95);
  transition: transform 0.3s var(--ease-apple);
}

.modal-overlay.active .modal-content {
  transform: scale(1);
}

/* --------------------------------------------------------------------------
   Animations (Intersection Observer)
   -------------------------------------------------------------------------- */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s var(--ease-apple), transform 0.8s var(--ease-apple);
}

.reveal-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}