@charset "utf-8";

/* ============================================
   굿숨 (gsuum.com) Design System
   Version 3.0 — Interactive & Comfortable
   ============================================ */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@300;400;500;700&family=Noto+Serif+KR:wght@400;700&display=swap');

/* ============================================
   CSS Custom Properties (Design Tokens)
   ============================================ */
:root {
  /* Primary Colors - Soft Teal */
  --gs-primary: #5D949D;
  --gs-primary-light: #7BB4BD;
  --gs-primary-lighter: #A8D5DB;
  --gs-primary-dark: #3D7A84;
  --gs-primary-darker: #245E67;

  /* Accent Colors - Warm Peach */
  --gs-accent: #E8A87C;
  --gs-accent-light: #F0C4A8;
  --gs-accent-dark: #D4896A;

  /* Neutral Colors */
  --gs-white: #FFFFFF;
  --gs-gray-50: #F8FAFB;
  --gs-gray-100: #F0F4F5;
  --gs-gray-200: #E2E8EA;
  --gs-gray-300: #C5D0D3;
  --gs-gray-400: #9AABAF;
  --gs-gray-500: #6E8589;
  --gs-gray-600: #4A5C60;
  --gs-gray-700: #364548;
  --gs-gray-800: #232E30;
  --gs-gray-900: #141C1E;
  --gs-black: #0A1011;

  /* Semantic Colors */
  --gs-success: #6BBF8A;
  --gs-warning: #E8C87C;
  --gs-danger: #D47B7B;
  --gs-info: #7BAFCC;

  /* Background & Surface */
  --gs-bg: #F8FAFB;
  --gs-bg-alt: #F0F4F5;
  --gs-surface: #FFFFFF;
  --gs-surface-elevated: #FFFFFF;

  /* Text Colors */
  --gs-text: #232E30;
  --gs-text-secondary: #6E8589;
  --gs-text-muted: #9AABAF;
  --gs-text-inverse: #FFFFFF;

  /* Border */
  --gs-border: #E2E8EA;
  --gs-border-light: #F0F4F5;

  /* Typography */
  --gs-font-sans: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --gs-font-serif: 'Noto Serif KR', Georgia, serif;
  --gs-font-mono: 'SF Mono', 'Fira Code', monospace;

  /* Font Sizes */
  --gs-text-xs: 0.75rem;
  --gs-text-sm: 0.875rem;
  --gs-text-base: 1rem;
  --gs-text-lg: 1.125rem;
  --gs-text-xl: 1.25rem;
  --gs-text-2xl: 1.5rem;
  --gs-text-3xl: 1.875rem;
  --gs-text-4xl: 2.25rem;
  --gs-text-5xl: 3rem;

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

  /* Border Radius */
  --gs-radius-sm: 0.375rem;
  --gs-radius: 0.75rem;
  --gs-radius-lg: 1rem;
  --gs-radius-xl: 1.5rem;
  --gs-radius-2xl: 2rem;
  --gs-radius-full: 9999px;

  /* Shadows — softer, warmer feel */
  --gs-shadow-sm: 0 1px 3px rgba(93, 148, 157, 0.06), 0 1px 2px rgba(0,0,0,0.04);
  --gs-shadow: 0 4px 16px rgba(93, 148, 157, 0.08), 0 2px 6px rgba(0,0,0,0.04);
  --gs-shadow-lg: 0 12px 40px rgba(93, 148, 157, 0.12), 0 4px 12px rgba(0,0,0,0.04);
  --gs-shadow-xl: 0 20px 60px rgba(93, 148, 157, 0.16), 0 8px 20px rgba(0,0,0,0.04);
  --gs-shadow-glow: 0 0 30px rgba(93, 148, 157, 0.2);

  /* Transitions */
  --gs-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --gs-transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --gs-transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --gs-transition-spring: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Navbar */
  --gs-navbar-height: 72px;
}

/* ============================================
   Dark Mode
   ============================================ */
[data-theme="dark"] {
  --gs-bg: #0F1A1C;
  --gs-bg-alt: #162224;
  --gs-surface: #1C2E31;
  --gs-surface-elevated: #243A3E;

  --gs-text: #E2E8EA;
  --gs-text-secondary: #9AABAF;
  --gs-text-muted: #6E8589;
  --gs-text-inverse: #141C1E;

  --gs-border: #2A4044;
  --gs-border-light: #1C2E31;

  --gs-primary-light: #5D949D;
  --gs-primary-lighter: #3D7A84;

  --gs-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --gs-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
  --gs-shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.45);
  --gs-shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.55);
  --gs-shadow-glow: 0 0 30px rgba(93, 148, 157, 0.15);
}

/* ============================================
   Base Styles
   ============================================ */
*, *::before, *::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  padding: 0;
  font-family: var(--gs-font-sans);
  font-size: var(--gs-text-base);
  font-weight: 400;
  line-height: 1.7;
  color: var(--gs-text);
  background-color: var(--gs-bg);
  transition: background-color 0.4s ease, color 0.4s ease;
  overflow-x: hidden;
}

/* Selection */
::selection {
  background: var(--gs-primary-lighter);
  color: var(--gs-primary-darker);
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--gs-font-sans);
  font-weight: 700;
  line-height: 1.3;
  color: var(--gs-text);
  margin-bottom: var(--gs-space-4);
}

h1 { font-size: var(--gs-text-4xl); }
h2 { font-size: var(--gs-text-3xl); }
h3 { font-size: var(--gs-text-2xl); }
h4 { font-size: var(--gs-text-xl); }
h5 { font-size: var(--gs-text-lg); }
h6 { font-size: var(--gs-text-base); }

p {
  margin-bottom: var(--gs-space-4);
  color: var(--gs-text-secondary);
}

.gs-text-serif {
  font-family: var(--gs-font-serif);
}

.gs-text-gradient {
  background: linear-gradient(135deg, var(--gs-primary), var(--gs-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ============================================
   Links
   ============================================ */
a {
  color: var(--gs-primary);
  text-decoration: none;
  transition: var(--gs-transition-fast);
}

a:hover {
  color: var(--gs-primary-dark);
}

a:visited {
  color: var(--gs-primary);
}

/* ============================================
   Scroll Reveal Animation
   ============================================ */
.gs-reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.gs-reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.gs-reveal-delay-1 { transition-delay: 0.1s; }
.gs-reveal-delay-2 { transition-delay: 0.2s; }
.gs-reveal-delay-3 { transition-delay: 0.3s; }

/* ============================================
   Floating Particles Background
   ============================================ */
.gs-particles {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.gs-particle {
  position: absolute;
  border-radius: 50%;
  opacity: 0;
  animation: gs-float linear infinite;
}

@keyframes gs-float {
  0% {
    opacity: 0;
    transform: translateY(100vh) scale(0);
  }
  10% {
    opacity: 0.6;
  }
  90% {
    opacity: 0.6;
  }
  100% {
    opacity: 0;
    transform: translateY(-10vh) scale(1);
  }
}

/* ============================================
   Navbar
   ============================================ */
.gs-navbar {
  border-bottom: 1px solid var(--gs-border);
  padding: var(--gs-space-3) 0;
  position: sticky;
  top: 0;
  z-index: 1030;
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  background: rgba(255, 255, 255, 0.85);
  transition: var(--gs-transition);
}

.gs-navbar.scrolled {
  box-shadow: var(--gs-shadow);
  border-bottom-color: transparent;
}

[data-theme="dark"] .gs-navbar {
  background: rgba(15, 26, 28, 0.88);
}

.gs-navbar .navbar-brand img {
  height: 40px;
  width: auto;
  transition: var(--gs-transition-fast);
}

.gs-navbar .navbar-brand:hover img {
  transform: scale(1.05);
  filter: brightness(1.1);
}

.gs-navbar .nav-link {
  color: var(--gs-text-secondary) !important;
  font-weight: 500;
  font-size: var(--gs-text-sm);
  padding: var(--gs-space-2) var(--gs-space-4) !important;
  border-radius: var(--gs-radius-sm);
  transition: var(--gs-transition);
  position: relative;
}

.gs-navbar .nav-link:hover,
.gs-navbar .nav-link.active {
  color: var(--gs-primary) !important;
  background: rgba(93, 148, 157, 0.08);
}

.gs-navbar .nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--gs-primary);
  border-radius: var(--gs-radius-full);
}

.gs-navbar .nav-link i,
.gs-navbar .nav-link img {
  margin-right: var(--gs-space-1);
}

.gs-navbar .nav-link img {
  width: 24px;
  height: 24px;
  vertical-align: middle;
}

.gs-navbar .dropdown-menu {
  border: 1px solid var(--gs-border);
  border-radius: var(--gs-radius);
  box-shadow: var(--gs-shadow-lg);
  padding: var(--gs-space-2);
  background: var(--gs-surface);
  margin-top: var(--gs-space-2);
  animation: gs-dropdownIn 0.2s ease;
}

@keyframes gs-dropdownIn {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

.gs-navbar .dropdown-item {
  border-radius: var(--gs-radius-sm);
  padding: var(--gs-space-2) var(--gs-space-4);
  font-size: var(--gs-text-sm);
  color: var(--gs-text-secondary);
  transition: var(--gs-transition-fast);
}

.gs-navbar .dropdown-item:hover {
  background: rgba(93, 148, 157, 0.08);
  color: var(--gs-primary);
}

.gs-navbar .navbar-toggler {
  border: 1px solid var(--gs-border);
  border-radius: var(--gs-radius-sm);
  padding: var(--gs-space-2);
}

.gs-navbar .navbar-toggler:focus {
  box-shadow: 0 0 0 3px rgba(93, 148, 157, 0.2);
}

/* Dark mode toggle */
.gs-theme-toggle {
  background: none;
  border: 1px solid var(--gs-border);
  border-radius: var(--gs-radius-full);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--gs-text-secondary);
  transition: var(--gs-transition-spring);
  font-size: var(--gs-text-lg);
}

.gs-theme-toggle:hover {
  background: rgba(93, 148, 157, 0.08);
  color: var(--gs-primary);
  border-color: var(--gs-primary-light);
  transform: rotate(20deg);
}

/* ============================================
   Hero Section
   ============================================ */
.gs-hero {
  padding: var(--gs-space-24) 0 var(--gs-space-20);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.gs-hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 40%, rgba(93, 148, 157, 0.07) 0%, transparent 50%),
              radial-gradient(circle at 70% 60%, rgba(232, 168, 124, 0.05) 0%, transparent 50%),
              radial-gradient(circle at 50% 80%, rgba(93, 148, 157, 0.04) 0%, transparent 40%);
  z-index: 0;
  animation: gs-heroGradient 15s ease-in-out infinite alternate;
}

@keyframes gs-heroGradient {
  0% { transform: translate(0, 0) rotate(0deg); }
  100% { transform: translate(-2%, -2%) rotate(3deg); }
}

.gs-hero > * {
  position: relative;
  z-index: 1;
}

.gs-hero h1 {
  font-size: var(--gs-text-5xl);
  font-weight: 700;
  margin-bottom: var(--gs-space-6);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.gs-hero .gs-hero-subtitle {
  font-size: var(--gs-text-xl);
  color: var(--gs-text-secondary);
  max-width: 600px;
  margin: 0 auto var(--gs-space-10);
  line-height: 1.8;
}

@media (max-width: 768px) {
  .gs-hero {
    padding: var(--gs-space-16) 0 var(--gs-space-12);
  }
  .gs-hero h1 {
    font-size: var(--gs-text-3xl);
  }
  .gs-hero .gs-hero-subtitle {
    font-size: var(--gs-text-base);
  }
}

/* ============================================
   Buttons
   ============================================ */
.gs-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--gs-space-2);
  padding: var(--gs-space-3) var(--gs-space-8);
  font-family: var(--gs-font-sans);
  font-size: var(--gs-text-sm);
  font-weight: 600;
  line-height: 1.5;
  border-radius: var(--gs-radius-lg);
  border: none;
  cursor: pointer;
  transition: var(--gs-transition);
  text-decoration: none;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.gs-btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, rgba(255,255,255,0.3) 0%, transparent 70%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.gs-btn:hover::after {
  opacity: 1;
}

.gs-btn:hover {
  transform: translateY(-2px);
  text-decoration: none;
}

.gs-btn:active {
  transform: translateY(0) scale(0.98);
}

.gs-btn-primary {
  background: linear-gradient(135deg, var(--gs-primary), var(--gs-primary-dark));
  color: var(--gs-white);
  box-shadow: 0 4px 14px rgba(93, 148, 157, 0.3);
}

.gs-btn-primary:hover {
  box-shadow: 0 8px 25px rgba(93, 148, 157, 0.4);
  color: var(--gs-white);
}

.gs-btn-outline {
  background: transparent;
  color: var(--gs-primary);
  border: 2px solid var(--gs-primary);
}

.gs-btn-outline:hover {
  background: var(--gs-primary);
  color: var(--gs-white);
}

.gs-btn-outline::after { display: none; }

.gs-btn-ghost {
  background: transparent;
  color: var(--gs-text-secondary);
}

.gs-btn-ghost:hover {
  background: rgba(93, 148, 157, 0.08);
  color: var(--gs-primary);
}

.gs-btn-ghost::after { display: none; }

.gs-btn-lg {
  padding: var(--gs-space-4) var(--gs-space-10);
  font-size: var(--gs-text-base);
  border-radius: var(--gs-radius-xl);
}

.gs-btn-sm {
  padding: var(--gs-space-1) var(--gs-space-4);
  font-size: var(--gs-text-xs);
}

.gs-btn-icon {
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: var(--gs-radius-full);
}

/* ============================================
   Cards
   ============================================ */
.gs-card {
  background: var(--gs-surface);
  border-radius: var(--gs-radius-xl);
  border: 1px solid var(--gs-border);
  padding: var(--gs-space-8);
  transition: var(--gs-transition);
}

.gs-card:hover {
  box-shadow: var(--gs-shadow);
  border-color: var(--gs-primary-lighter);
}

.gs-card-elevated {
  box-shadow: var(--gs-shadow);
  border: none;
}

.gs-card-elevated:hover {
  box-shadow: var(--gs-shadow-lg);
  transform: translateY(-4px);
}

/* ============================================
   Breathing Animation Container
   ============================================ */
.gs-breath-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 400px;
  position: relative;
}

.gs-breath-circle {
  width: 200px;
  height: 200px;
  border-radius: var(--gs-radius-full);
  background: linear-gradient(135deg, var(--gs-primary), var(--gs-primary-light));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gs-white);
  font-size: var(--gs-text-2xl);
  font-weight: 700;
  cursor: pointer;
  box-shadow: var(--gs-shadow-glow);
  transition: box-shadow 0.3s ease;
  position: relative;
  user-select: none;
}

.gs-breath-circle::before {
  content: '';
  position: absolute;
  top: -10px;
  left: -10px;
  right: -10px;
  bottom: -10px;
  border-radius: var(--gs-radius-full);
  border: 2px solid var(--gs-primary-lighter);
  opacity: 0.3;
  animation: gs-breathRing 3s ease-in-out infinite;
}

@keyframes gs-breathRing {
  0%, 100% { transform: scale(1); opacity: 0.3; }
  50% { transform: scale(1.05); opacity: 0.15; }
}

.gs-breath-circle::after {
  content: '';
  position: absolute;
  top: -20px;
  left: -20px;
  right: -20px;
  bottom: -20px;
  border-radius: var(--gs-radius-full);
  border: 1px solid var(--gs-primary-lighter);
  opacity: 0.15;
}

.gs-breath-circle.breathing {
  animation-fill-mode: forwards;
}

@keyframes breatheIn {
  from { transform: scale(1); }
  to { transform: scale(1.5); }
}

@keyframes breatheOut {
  from { transform: scale(1.5); }
  to { transform: scale(1); }
}

@keyframes breatheHold {
  from { transform: scale(1.5); }
  to { transform: scale(1.5); }
}

@keyframes breathePulse {
  0% { box-shadow: 0 0 0 0 rgba(93, 148, 157, 0.4); }
  70% { box-shadow: 0 0 0 20px rgba(93, 148, 157, 0); }
  100% { box-shadow: 0 0 0 0 rgba(93, 148, 157, 0); }
}

.gs-breath-timer {
  font-size: var(--gs-text-5xl);
  font-weight: 300;
  color: white;
  opacity: 0.7;
  position: absolute;
}

.gs-breath-status {
  margin-top: var(--gs-space-6);
  font-size: var(--gs-text-lg);
  font-weight: 500;
  color: var(--gs-primary);
  transition: var(--gs-transition-fast);
}

/* ============================================
   Pattern Selector
   ============================================ */
.gs-pattern-selector {
  display: flex;
  gap: var(--gs-space-3);
  flex-wrap: wrap;
  justify-content: center;
  margin: var(--gs-space-6) 0;
}

.gs-pattern-btn {
  padding: var(--gs-space-2) var(--gs-space-5);
  border-radius: var(--gs-radius-full);
  border: 2px solid var(--gs-border);
  background: var(--gs-surface);
  color: var(--gs-text-secondary);
  font-size: var(--gs-text-sm);
  font-weight: 500;
  cursor: pointer;
  transition: var(--gs-transition-spring);
}

.gs-pattern-btn:hover {
  border-color: var(--gs-primary-light);
  color: var(--gs-primary);
  transform: translateY(-2px);
}

.gs-pattern-btn.active {
  background: var(--gs-primary);
  border-color: var(--gs-primary);
  color: var(--gs-white);
  box-shadow: 0 4px 12px rgba(93, 148, 157, 0.3);
}

/* ============================================
   Background/Sound Selector
   ============================================ */
.gs-bg-selector {
  display: flex;
  gap: var(--gs-space-3);
  flex-wrap: wrap;
  justify-content: center;
  margin: var(--gs-space-4) 0;
}

.gs-bg-option {
  display: flex;
  align-items: center;
  gap: var(--gs-space-2);
  padding: var(--gs-space-2) var(--gs-space-4);
  border-radius: var(--gs-radius-full);
  border: 1px solid var(--gs-border);
  background: var(--gs-surface);
  color: var(--gs-text-secondary);
  font-size: var(--gs-text-sm);
  cursor: pointer;
  transition: var(--gs-transition);
}

.gs-bg-option:hover {
  border-color: var(--gs-primary-light);
  background: rgba(93, 148, 157, 0.06);
  transform: translateY(-1px);
}

.gs-bg-option.active {
  background: rgba(93, 148, 157, 0.12);
  border-color: var(--gs-primary);
  color: var(--gs-primary-dark);
}

.gs-bg-option i {
  font-size: var(--gs-text-base);
}

/* ============================================
   Volume Control
   ============================================ */
.gs-volume-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--gs-space-2);
  padding: var(--gs-space-2) var(--gs-space-4);
  border-radius: var(--gs-radius-full);
  border: 1px solid var(--gs-border);
  background: var(--gs-surface);
  color: var(--gs-text-secondary);
  cursor: pointer;
  transition: var(--gs-transition);
  font-size: var(--gs-text-sm);
}

.gs-volume-btn:hover {
  border-color: var(--gs-primary-light);
  color: var(--gs-primary);
}

/* ============================================
   Meditation Timer
   ============================================ */
.gs-timer {
  display: flex;
  align-items: center;
  gap: var(--gs-space-4);
  justify-content: center;
  margin: var(--gs-space-6) 0;
}

.gs-timer-display {
  font-size: var(--gs-text-3xl);
  font-weight: 300;
  color: var(--gs-primary);
  font-variant-numeric: tabular-nums;
}

.gs-timer-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--gs-radius-full);
  border: 1px solid var(--gs-border);
  background: var(--gs-surface);
  color: var(--gs-text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--gs-transition-spring);
}

.gs-timer-btn:hover {
  background: var(--gs-primary);
  color: var(--gs-white);
  border-color: var(--gs-primary);
  transform: scale(1.1);
}

/* ============================================
   Session Stats
   ============================================ */
.gs-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--gs-space-4);
  margin: var(--gs-space-8) 0;
}

.gs-stat-card {
  background: var(--gs-surface);
  border: 1px solid var(--gs-border);
  border-radius: var(--gs-radius-lg);
  padding: var(--gs-space-5);
  text-align: center;
  transition: var(--gs-transition);
}

.gs-stat-card:hover {
  border-color: var(--gs-primary-lighter);
  transform: translateY(-2px);
  box-shadow: var(--gs-shadow);
}

.gs-stat-value {
  font-size: var(--gs-text-2xl);
  font-weight: 700;
  color: var(--gs-primary);
  transition: var(--gs-transition-fast);
}

.gs-stat-label {
  font-size: var(--gs-text-xs);
  color: var(--gs-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: var(--gs-space-1);
}

/* ============================================
   Progress Bar
   ============================================ */
.gs-progress {
  width: 100%;
  height: 8px;
  background: var(--gs-bg-alt);
  border-radius: var(--gs-radius-full);
  overflow: hidden;
  margin: var(--gs-space-4) 0;
}

.gs-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--gs-primary), var(--gs-accent));
  border-radius: var(--gs-radius-full);
  transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}

.gs-progress-bar::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.2) 50%, transparent 100%);
  animation: gs-progressShimmer 2s ease-in-out infinite;
}

@keyframes gs-progressShimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

.gs-progress-text {
  display: flex;
  justify-content: space-between;
  font-size: var(--gs-text-sm);
  color: var(--gs-text-muted);
  margin-bottom: var(--gs-space-2);
}

/* ============================================
   Content Card (Goodfeeling)
   ============================================ */
.gs-content-card {
  background: var(--gs-surface);
  border: 1px solid var(--gs-border);
  border-radius: var(--gs-radius-2xl);
  padding: var(--gs-space-12) var(--gs-space-8);
  text-align: center;
  min-height: 220px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  transition: var(--gs-transition);
  box-shadow: var(--gs-shadow-sm);
}

.gs-content-card:hover {
  box-shadow: var(--gs-shadow);
}

.gs-content-card .gs-content-number {
  position: absolute;
  top: var(--gs-space-6);
  left: var(--gs-space-6);
  font-size: var(--gs-text-sm);
  color: var(--gs-text-muted);
  font-weight: 500;
}

.gs-content-card .gs-content-text {
  font-family: var(--gs-font-serif);
  font-size: var(--gs-text-xl);
  line-height: 1.8;
  color: var(--gs-text);
  max-width: 500px;
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.gs-content-card .gs-favorite-btn {
  position: absolute;
  top: var(--gs-space-6);
  right: var(--gs-space-6);
  background: none;
  border: none;
  color: var(--gs-text-muted);
  font-size: var(--gs-text-xl);
  cursor: pointer;
  transition: var(--gs-transition-spring);
}

.gs-content-card .gs-favorite-btn:hover {
  color: var(--gs-accent);
  transform: scale(1.2);
}

.gs-content-card .gs-favorite-btn.favorited {
  color: var(--gs-accent);
  animation: gs-heartPop 0.3s ease;
}

@keyframes gs-heartPop {
  0% { transform: scale(1); }
  50% { transform: scale(1.3); }
  100% { transform: scale(1); }
}

.gs-content-actions {
  display: flex;
  gap: var(--gs-space-4);
  justify-content: center;
  margin-top: var(--gs-space-8);
}

/* Loading animation */
.gs-loader {
  width: 40px;
  height: 40px;
  border: 3px solid var(--gs-border);
  border-top-color: var(--gs-primary);
  border-radius: 50%;
  animation: gs-spin 0.8s linear infinite;
}

@keyframes gs-spin {
  to { transform: rotate(360deg); }
}

/* Fade transitions */
.gs-fade-enter {
  opacity: 0;
  transform: translateY(10px);
}

.gs-fade-active {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

/* ============================================
   Section
   ============================================ */
.gs-section {
  padding: var(--gs-space-16) 0;
  position: relative;
}

.gs-section-header {
  text-align: center;
  margin-bottom: var(--gs-space-12);
}

.gs-section-header h2 {
  margin-bottom: var(--gs-space-4);
}

.gs-section-header p {
  max-width: 500px;
  margin: 0 auto;
}

.gs-divider {
  width: 50px;
  height: 3px;
  background: linear-gradient(90deg, var(--gs-primary), var(--gs-accent));
  border-radius: var(--gs-radius-full);
  margin: var(--gs-space-4) auto;
}

/* ============================================
   About / Profile
   ============================================ */
.gs-profile {
  text-align: center;
  padding: var(--gs-space-12) 0;
}

.gs-profile-image {
  width: 130px;
  height: 130px;
  border-radius: var(--gs-radius-full);
  object-fit: cover;
  border: 4px solid var(--gs-primary-lighter);
  margin-bottom: var(--gs-space-6);
  transition: var(--gs-transition);
  box-shadow: 0 0 0 8px rgba(93, 148, 157, 0.08);
}

.gs-profile-image:hover {
  transform: scale(1.05);
  box-shadow: 0 0 0 12px rgba(93, 148, 157, 0.12);
}

.gs-profile-name {
  font-size: var(--gs-text-2xl);
  font-weight: 700;
  margin-bottom: var(--gs-space-2);
}

.gs-profile-bio {
  font-size: var(--gs-text-lg);
  color: var(--gs-text-secondary);
  max-width: 400px;
  margin: 0 auto;
  line-height: 1.8;
}

.gs-mission-card {
  background: var(--gs-surface);
  border: 1px solid var(--gs-border);
  border-radius: var(--gs-radius-xl);
  padding: var(--gs-space-8);
  text-align: center;
  transition: var(--gs-transition);
  position: relative;
  overflow: hidden;
}

.gs-mission-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--gs-primary), var(--gs-accent));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.gs-mission-card:hover {
  border-color: var(--gs-primary-lighter);
  box-shadow: var(--gs-shadow-lg);
  transform: translateY(-6px);
}

.gs-mission-card:hover::before {
  opacity: 1;
}

.gs-mission-card i {
  font-size: var(--gs-text-3xl);
  color: var(--gs-primary);
  margin-bottom: var(--gs-space-4);
  transition: var(--gs-transition-spring);
}

.gs-mission-card:hover i {
  transform: scale(1.15);
  color: var(--gs-accent);
}

.gs-mission-card h3 {
  font-size: var(--gs-text-lg);
  margin-bottom: var(--gs-space-3);
}

.gs-mission-card p {
  font-size: var(--gs-text-sm);
  margin-bottom: 0;
}

/* ============================================
   Footer
   ============================================ */
.gs-footer {
  background: var(--gs-gray-900);
  color: var(--gs-gray-400);
  padding: var(--gs-space-12) 0 var(--gs-space-8);
  margin-top: var(--gs-space-16);
  position: relative;
}

.gs-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gs-primary-dark), transparent);
}

.gs-footer a {
  color: var(--gs-gray-400);
  transition: var(--gs-transition-fast);
}

.gs-footer a:hover {
  color: var(--gs-primary-light);
  transform: translateX(2px);
}

.gs-footer-brand {
  font-size: var(--gs-text-xl);
  font-weight: 700;
  color: var(--gs-white);
  margin-bottom: var(--gs-space-3);
}

.gs-footer-desc {
  font-size: var(--gs-text-sm);
  color: var(--gs-gray-500);
  max-width: 300px;
  line-height: 1.7;
}

.gs-footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.gs-footer-links li {
  margin-bottom: var(--gs-space-2);
}

.gs-footer-links a {
  font-size: var(--gs-text-sm);
  display: inline-flex;
  align-items: center;
  gap: var(--gs-space-2);
  transition: var(--gs-transition);
}

.gs-footer-links a:hover {
  color: var(--gs-white);
  transform: translateX(4px);
}

.gs-footer-title {
  font-size: var(--gs-text-sm);
  font-weight: 600;
  color: var(--gs-gray-300);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--gs-space-4);
}

.gs-footer-bottom {
  border-top: 1px solid var(--gs-gray-800);
  margin-top: var(--gs-space-8);
  padding-top: var(--gs-space-6);
  font-size: var(--gs-text-xs);
  color: var(--gs-gray-500);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--gs-space-4);
}

/* ============================================
   SNS / Share
   ============================================ */
.gs-share {
  display: flex;
  align-items: center;
  gap: var(--gs-space-3);
  padding: var(--gs-space-4) 0;
}

.gs-share-label {
  font-size: var(--gs-text-sm);
  color: var(--gs-text-muted);
  font-weight: 500;
}

.gs-share-btn {
  width: 42px;
  height: 42px;
  border-radius: var(--gs-radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--gs-border);
  background: var(--gs-surface);
  color: var(--gs-text-secondary);
  transition: var(--gs-transition-spring);
  cursor: pointer;
  font-size: var(--gs-text-base);
}

.gs-share-btn:hover {
  background: var(--gs-primary);
  color: var(--gs-white);
  border-color: var(--gs-primary);
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 4px 12px rgba(93, 148, 157, 0.3);
}

.gs-share-btn img {
  width: 20px;
  height: 20px;
}

/* ============================================
   404 Page
   ============================================ */
.gs-error-page {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  text-align: center;
  padding: var(--gs-space-12);
}

.gs-error-code {
  font-size: 8rem;
  font-weight: 700;
  line-height: 1;
  background: linear-gradient(135deg, var(--gs-primary-lighter), var(--gs-primary), var(--gs-accent));
  background-size: 200% 200%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--gs-space-4);
  animation: gs-gradientShift 4s ease-in-out infinite;
}

@keyframes gs-gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.gs-error-message {
  font-size: var(--gs-text-xl);
  color: var(--gs-text-secondary);
  margin-bottom: var(--gs-space-8);
}

/* ============================================
   Video Background
   ============================================ */
.gs-video-bg {
  position: fixed;
  right: 0;
  bottom: 0;
  min-width: 100%;
  min-height: 100%;
  z-index: -1;
  object-fit: cover;
}

.gs-video-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(248, 250, 251, 0.85);
  z-index: -1;
  transition: background 0.5s ease;
}

[data-theme="dark"] .gs-video-overlay {
  background: rgba(15, 26, 28, 0.85);
}

/* ============================================
   Modal
   ============================================ */
.gs-modal .modal-content {
  border: none;
  border-radius: var(--gs-radius-xl);
  box-shadow: var(--gs-shadow-xl);
  overflow: hidden;
}

.gs-modal .modal-header {
  border-bottom: 1px solid var(--gs-border);
  padding: var(--gs-space-6);
  background: var(--gs-surface);
}

.gs-modal .modal-title {
  font-size: var(--gs-text-lg);
  font-weight: 600;
}

.gs-modal .modal-body {
  padding: var(--gs-space-6);
  background: var(--gs-surface);
}

.gs-modal .modal-footer {
  border-top: 1px solid var(--gs-border);
  padding: var(--gs-space-4) var(--gs-space-6);
  background: var(--gs-surface);
}

.gs-modal .btn-close {
  opacity: 0.5;
}

/* ============================================
   Utilities
   ============================================ */
.gs-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--gs-space-6);
}

.gs-container-lg {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--gs-space-6);
}

.gs-text-center { text-align: center; }
.gs-text-left { text-align: left; }
.gs-text-right { text-align: right; }

.gs-mt-4 { margin-top: var(--gs-space-4); }
.gs-mt-8 { margin-top: var(--gs-space-8); }
.gs-mb-4 { margin-bottom: var(--gs-space-4); }
.gs-mb-8 { margin-bottom: var(--gs-space-8); }

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

/* Glassmorphism */
.gs-glass {
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(16px) saturate(1.3);
  -webkit-backdrop-filter: blur(16px) saturate(1.3);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

[data-theme="dark"] .gs-glass {
  background: rgba(28, 46, 49, 0.7);
  border: 1px solid rgba(42, 64, 68, 0.3);
}

/* ============================================
   Toast Notification
   ============================================ */
.gs-toast {
  position: fixed;
  bottom: var(--gs-space-8);
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--gs-gray-900);
  color: var(--gs-white);
  padding: var(--gs-space-3) var(--gs-space-6);
  border-radius: var(--gs-radius-full);
  font-size: var(--gs-text-sm);
  font-weight: 500;
  z-index: 9999;
  opacity: 0;
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.3s ease;
  box-shadow: var(--gs-shadow-lg);
}

.gs-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 576px) {
  :root {
    --gs-text-4xl: 1.75rem;
    --gs-text-5xl: 2.25rem;
  }

  .gs-stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .gs-footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .gs-error-code {
    font-size: 5rem;
  }
}

/* ============================================
   Page Enter Animation
   ============================================ */
.gs-page-enter {
  animation: gs-pageIn 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes gs-pageIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================
   Focus Visible (Accessibility)
   ============================================ */
:focus-visible {
  outline: 2px solid var(--gs-primary);
  outline-offset: 2px;
  border-radius: var(--gs-radius-sm);
}

/* ============================================
   Smooth Scrollbar
   ============================================ */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--gs-bg);
}

::-webkit-scrollbar-thumb {
  background: var(--gs-gray-300);
  border-radius: var(--gs-radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--gs-gray-400);
}

[data-theme="dark"] ::-webkit-scrollbar-track {
  background: var(--gs-gray-900);
}

[data-theme="dark"] ::-webkit-scrollbar-thumb {
  background: var(--gs-gray-700);
}