/* ============================================
   CodePopcorn.com — Design System
   Core CSS Variables & Base Styles
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@400;500;600;700;800;900&display=swap');

/* ── Variables ─────────────────────────────── */
:root {
  /* Dark Mode (default) */
  --bg-primary:    #07070f;
  --bg-secondary:  #0f0f1a;
  --bg-card:       #14141e;
  --bg-card-hover: #1c1c2a;
  --bg-glass:      rgba(20,20,30,0.7);

  --border:        rgba(255,255,255,0.07);
  --border-hover:  rgba(255,255,255,0.15);

  --text-primary:  #f0f0ff;
  --text-secondary:#94a3b8;
  --text-muted:    #4a5568;

  --accent-1: #7c3aed;   /* purple */
  --accent-2: #ec4899;   /* pink   */
  --accent-3: #06b6d4;   /* cyan   */
  --accent-4: #f59e0b;   /* amber  */
  --accent-5: #10b981;   /* green  */

  --grad-main:  linear-gradient(135deg, #7c3aed 0%, #ec4899 100%);
  --grad-card:  linear-gradient(145deg, #14141e 0%, #1c1c2a 100%);
  --grad-glow:  radial-gradient(ellipse at 50% 0%, rgba(124,58,237,0.15) 0%, transparent 70%);

  --shadow-sm: 0 2px 8px rgba(0,0,0,0.4);
  --shadow-md: 0 4px 24px rgba(0,0,0,0.5);
  --shadow-lg: 0 8px 48px rgba(0,0,0,0.6);
  --shadow-glow: 0 0 40px rgba(124,58,237,0.25);

  --radius-sm: 10px;
  --radius:    16px;
  --radius-lg: 24px;
  --radius-xl: 32px;

  --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
  --transition-fast: all 0.15s ease;

  --navbar-h: 64px;
  --max-w: 1200px;
}

[data-theme="light"] {
  --bg-primary:    #f4f4fc;
  --bg-secondary:  #eeeef8;
  --bg-card:       #ffffff;
  --bg-card-hover: #f8f8ff;
  --bg-glass:      rgba(255,255,255,0.8);

  --border:        rgba(0,0,0,0.07);
  --border-hover:  rgba(0,0,0,0.15);

  --text-primary:  #0f0f1a;
  --text-secondary:#4a5568;
  --text-muted:    #94a3b8;

  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 24px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 48px rgba(0,0,0,0.14);
  --shadow-glow: 0 0 40px rgba(124,58,237,0.12);

  --grad-glow: radial-gradient(ellipse at 50% 0%, rgba(124,58,237,0.08) 0%, transparent 70%);
}

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

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

body {
  font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  transition: background 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
}

/* ── Typography ────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h3 { font-size: clamp(1.1rem, 2vw, 1.5rem); }

p  { color: var(--text-secondary); line-height: 1.75; }
a  { color: inherit; text-decoration: none; }

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

/* ── Navbar ────────────────────────────────── */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--navbar-h);
  z-index: 100;
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

.navbar-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  flex-shrink: 0;
}
.logo-icon { font-size: 1.5rem; }
.logo-text { background: var(--grad-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

.nav-links {
  display: flex;
  gap: 4px;
  list-style: none;
}
.nav-links a {
  padding: 6px 14px;
  border-radius: 8px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition-fast);
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
  background: var(--border);
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

/* Lang Toggle */
.lang-btn {
  padding: 5px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: var(--transition-fast);
}
.lang-btn:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
  background: var(--border);
}

/* Theme Toggle */
.theme-btn {
  width: 38px; height: 38px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
}
.theme-btn:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
  background: var(--border);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 6px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: transparent;
}
.hamburger span {
  display: block;
  width: 20px; height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition-fast);
}

/* Mobile nav */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--navbar-h);
  left: 0; right: 0;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  padding: 16px 24px;
  z-index: 99;
  flex-direction: column;
  gap: 4px;
}
.mobile-nav.open { display: flex; }
.mobile-nav a {
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition-fast);
}
.mobile-nav a:hover { color: var(--text-primary); background: var(--border); }

/* ── Layout ────────────────────────────────── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

.page-main {
  padding-top: calc(var(--navbar-h) + 48px);
  padding-bottom: 80px;
  min-height: 100vh;
}

/* ── Card ──────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: var(--transition);
}
.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card-glass {
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

/* ── Buttons ───────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: var(--transition-fast);
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: var(--grad-main);
  color: #fff;
  box-shadow: 0 4px 16px rgba(124,58,237,0.4);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(124,58,237,0.5);
}

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

.btn-lg {
  padding: 14px 32px;
  font-size: 1rem;
  border-radius: var(--radius);
}
.btn-sm {
  padding: 6px 14px;
  font-size: 0.82rem;
  border-radius: 7px;
}

/* ── Badge ─────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.badge-purple { background: rgba(124,58,237,0.15); color: #a78bfa; border: 1px solid rgba(124,58,237,0.3); }
.badge-pink   { background: rgba(236,72,153,0.15); color: #f472b6; border: 1px solid rgba(236,72,153,0.3); }
.badge-cyan   { background: rgba(6,182,212,0.15);  color: #22d3ee; border: 1px solid rgba(6,182,212,0.3);  }
.badge-amber  { background: rgba(245,158,11,0.15); color: #fbbf24; border: 1px solid rgba(245,158,11,0.3); }
.badge-green  { background: rgba(16,185,129,0.15); color: #34d399; border: 1px solid rgba(16,185,129,0.3); }

/* ── Emoji Display ─────────────────────────── */
.emoji-display {
  font-family: 'Segoe UI Emoji', 'Apple Color Emoji', 'Noto Color Emoji', sans-serif;
  line-height: 1;
}

.emoji-xl  { font-size: 4rem; }
.emoji-lg  { font-size: 2.5rem; }
.emoji-md  { font-size: 1.8rem; }
.emoji-sm  { font-size: 1.2rem; }

.emoji-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: var(--transition-fast);
  text-align: center;
}
.emoji-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent-1);
  transform: scale(1.05);
  box-shadow: var(--shadow-glow);
}
.emoji-card .emoji-char {
  font-size: 2rem;
  line-height: 1;
}
.emoji-card .emoji-name {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

/* ── Search Input ──────────────────────────── */
.search-wrap {
  position: relative;
}
.search-input {
  width: 100%;
  padding: 12px 16px 12px 44px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: inherit;
  transition: var(--transition-fast);
  outline: none;
}
.search-input:focus {
  border-color: var(--accent-1);
  box-shadow: 0 0 0 3px rgba(124,58,237,0.15);
}
.search-input::placeholder { color: var(--text-muted); }
.search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 1.1rem;
  pointer-events: none;
}

/* ── Grid ──────────────────────────────────── */
.emoji-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
  gap: 10px;
}

.bento-grid {
  display: grid;
  gap: 16px;
}

/* ── Copy Notification ─────────────────────── */
.copy-toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--grad-main);
  color: white;
  padding: 10px 24px;
  border-radius: 100px;
  font-size: 0.9rem;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
  pointer-events: none;
  z-index: 999;
  white-space: nowrap;
}
.copy-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ── Section ───────────────────────────────── */
.section { margin-bottom: 64px; }
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 12px;
}
.section-title {
  font-size: 1.4rem;
  font-weight: 700;
}
.section-subtitle {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ── Footer ────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border);
  background: var(--bg-secondary);
  padding: 48px 0 32px;
  margin-top: 80px;
}
.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-top: 12px;
  line-height: 1.7;
}
.footer-col h4 {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 14px;
}
.footer-col ul { list-style: none; }
.footer-col li + li { margin-top: 8px; }
.footer-col a {
  font-size: 0.88rem;
  color: var(--text-secondary);
  transition: var(--transition-fast);
}
.footer-col a:hover { color: var(--text-primary); }

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ── Lang switcher (show/hide) ─────────────── */
[data-lang] { display: none; }
.lang-ko [data-lang="ko"],
.lang-en [data-lang="en"] { display: unset; }
.lang-ko [data-lang-block="ko"],
.lang-en [data-lang-block="en"] { display: block; }

/* ── Scrollbar ─────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-hover); border-radius: 3px; }

/* ── Animations ────────────────────────────── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-10px); }
}
@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 20px rgba(124,58,237,0.2); }
  50%       { box-shadow: 0 0 40px rgba(124,58,237,0.5); }
}
@keyframes spin-slow {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

.fade-up   { animation: fadeUp 0.6s ease both; }
.float-anim { animation: float 3s ease-in-out infinite; }

/* Stagger delays */
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }

/* ── Responsive ────────────────────────────── */
@media (max-width: 768px) {
  .nav-links  { display: none; }
  .hamburger  { display: flex; }

  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .emoji-grid {
    grid-template-columns: repeat(auto-fill, minmax(68px, 1fr));
  }
}

@media (max-width: 480px) {
  .container  { padding: 0 16px; }
  .footer-top { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* ── Utility ───────────────────────────────── */
.text-center { text-align: center; }
.text-gradient { background: var(--grad-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.mt-4  { margin-top: 1rem; }
.mt-8  { margin-top: 2rem; }
.mb-4  { margin-bottom: 1rem; }
.mb-8  { margin-bottom: 2rem; }
.gap-2 { gap: 0.5rem; }
.gap-4 { gap: 1rem; }
.flex  { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.grid  { display: grid; }
.w-full { width: 100%; }