/* ══════════════════════════════════════════
   DESIGN TOKENS & CSS VARIABLES
══════════════════════════════════════════ */
:root {
  --app-bg: #0d0d0f;
  --surface: #16161a;
  --surface-2: #1e1e24;
  --border: rgba(255,255,255,0.07);
  --text-primary: #e8e8f0;
  --text-secondary: #888899;
  --accent: #7b61ff;
  --accent-glow: rgba(123,97,255,0.25);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --shadow-soft: 0 4px 24px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 40px var(--accent-glow);
  --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);

  /* Warna palet aktif (diubah via JS) */
  --c1: #2c3e50;
  --c2: #3498db;
  --c3: #e74c3c;
  --c4: #ecf0f1;
  --c5: #f39c12;

  /* Font aktif (diubah via JS) */
  --font-heading: 'Playfair Display', serif;
  --font-body: 'Source Sans 3', sans-serif;
}

/* ══════════════════════════════════════════
   RESET & BASE
══════════════════════════════════════════ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--app-bg);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ── Subtle grain texture overlay ── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 9999;
  opacity: 0.6;
}

/* ══════════════════════════════════════════
   APP SHELL LAYOUT
══════════════════════════════════════════ */
.app-wrapper {
  display: grid;
  grid-template-rows: auto 1fr;
  min-height: 100vh;
}

/* ── Header / Topbar ── */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 32px;
  border-bottom: 1px solid var(--border);
  background: rgba(13,13,15,0.85);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 100;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-primary);
}

.logo-icon {
  width: 34px; height: 34px;
  background: linear-gradient(135deg, var(--accent), #b46eff);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 16px;
}

.topbar-hint {
  font-size: 0.78rem;
  color: var(--text-secondary);
  display: flex; align-items: center; gap: 6px;
}

.kbd {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 2px 7px;
  font-size: 0.72rem;
  font-family: monospace;
  color: var(--text-primary);
}

/* ══════════════════════════════════════════
   MAIN CONTENT — dua panel
══════════════════════════════════════════ */
.main-content {
  display: grid;
  grid-template-columns: 420px 1fr;
  gap: 0;
}

/* ══════════════════════════════════════════
   PANEL KIRI — Kontrol & Palet
══════════════════════════════════════════ */
.left-panel {
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border);
  padding: 28px 24px;
  gap: 28px;
  height: calc(100vh - 69px);
  position: sticky;
  top: 69px;
  overflow-y: auto;
}

.left-panel::-webkit-scrollbar { width: 4px; }
.left-panel::-webkit-scrollbar-track { background: transparent; }
.left-panel::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

/* ── Section title ── */
.section-label {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 14px;
}

/* ══════════════════════════════════════════
   COLOR PALETTE SWATCHES
══════════════════════════════════════════ */
.palette-grid {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.swatch-card {
  display: flex;
  align-items: center;
  gap: 14px;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
  transition: var(--transition);
  position: relative;
}

.swatch-card:hover { border-color: rgba(255,255,255,0.14); }

.swatch-color {
  width: 72px;
  height: 72px;
  flex-shrink: 0;
  transition: background-color 0.5s cubic-bezier(0.4,0,0.2,1);
  cursor: pointer;
  position: relative;
}

.swatch-color::after {
  content: '⎘';
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  opacity: 0;
  background: rgba(0,0,0,0.25);
  transition: opacity 0.2s;
}
.swatch-color:hover::after { opacity: 1; }

.swatch-info {
  flex: 1;
  min-width: 0;
}

.swatch-role {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.swatch-hex {
  font-size: 1rem;
  font-weight: 600;
  font-family: 'Courier New', monospace;
  color: var(--text-primary);
  cursor: pointer;
  transition: color 0.2s;
  letter-spacing: 0.05em;
}

.swatch-hex:hover { color: var(--accent); }

/* Tombol Lock */
.lock-btn {
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px 14px;
  color: var(--text-secondary);
  font-size: 16px;
  transition: var(--transition);
  line-height: 1;
  flex-shrink: 0;
}

.lock-btn:hover { color: var(--text-primary); }
.lock-btn.locked { color: var(--accent); }

/* Nomor urut warna */
.swatch-num {
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--text-secondary);
  padding-left: 0;
  padding-right: 2px;
  width: 22px;
  text-align: center;
  flex-shrink: 0;
}

/* ══════════════════════════════════════════
   FONT PAIRING DISPLAY
══════════════════════════════════════════ */
.font-pairing-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 18px;
  transition: var(--transition);
}

.font-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
}

.font-row + .font-row {
  border-top: 1px solid var(--border);
}

.font-tag {
  background: var(--surface-2);
  border-radius: 5px;
  padding: 3px 8px;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
  flex-shrink: 0;
  width: 58px;
  text-align: center;
}

.font-name {
  font-size: 0.9rem;
  font-weight: 600;
  transition: font-family 0.4s ease;
}

.font-link {
  margin-left: auto;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 6px;
  text-decoration: none;
  transition: var(--transition);
  flex-shrink: 0;
  opacity: 0.5;
}
.font-link:hover {
  color: var(--accent);
  background: rgba(123,97,255,0.1);
  opacity: 1;
}

#font-name-heading { font-family: var(--font-heading); }
#font-name-body    { font-family: var(--font-body); }

/* ══════════════════════════════════════════
   TOMBOL GENERATE
══════════════════════════════════════════ */
.generate-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 16px;
  border: none;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--accent) 0%, #b46eff 100%);
  color: #fff;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(123,97,255,0.35);
}

.generate-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #b46eff 0%, var(--accent) 100%);
  opacity: 0;
  transition: opacity 0.35s;
}

.generate-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(123,97,255,0.5); }
.generate-btn:hover::before { opacity: 1; }
.generate-btn:active { transform: translateY(0); }

.generate-btn span, .generate-btn .btn-icon { position: relative; z-index: 1; }

.btn-icon { font-size: 18px; animation: spin 0s; }
.btn-icon.spinning { animation: spin 0.5s ease; }

@keyframes spin {
  0%   { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* ══════════════════════════════════════════
   PANEL KANAN — Live Preview
══════════════════════════════════════════ */
.right-panel {
  padding: 28px 32px;
  overflow-y: auto;
  background: var(--app-bg);
}

.preview-label {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.preview-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ══════════════════════════════════════════
   LIVE PREVIEW CANVAS
══════════════════════════════════════════ */
.preview-canvas {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-soft);
  transition: var(--transition);
}

/* ── Hero Section ── */
.preview-hero {
  background-color: #0f172a;
  padding: 52px 44px 44px;
  transition: background-color 0.5s cubic-bezier(0.4,0,0.2,1);
}

/* Navigasi mockup */
.preview-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 48px;
}

.preview-nav-logo {
  width: 88px; height: 10px;
  background-color: #e2e8f0;
  border-radius: 5px;
  opacity: 0.7;
  transition: background-color 0.5s ease;
}

.preview-nav-links {
  display: flex; gap: 20px;
}

.preview-nav-link {
  width: 44px; height: 8px;
  background-color: #e2e8f0;
  border-radius: 4px;
  opacity: 0.4;
  transition: background-color 0.5s ease;
}

/* Hero copy */
.preview-tagline {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #38bdf8;
  margin-bottom: 14px;
  transition: color 0.5s ease;
  font-family: var(--font-body);
}

.preview-h1 {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 3vw, 2.8rem);
  font-weight: 700;
  color: #e2e8f0;
  line-height: 1.15;
  margin-bottom: 16px;
  transition: color 0.5s ease, font-family 0.4s ease;
  max-width: 520px;
}

.preview-body-text {
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: #e2e8f0;
  opacity: 0.72;
  line-height: 1.7;
  max-width: 440px;
  margin-bottom: 32px;
  transition: color 0.5s ease, font-family 0.4s ease;
}

/* CTA Buttons */
.preview-btns {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.preview-btn-primary {
  background-color: #f97316;
  color: #ffffff;
  border: 2px solid #f97316;
  padding: 12px 28px;
  border-radius: 8px;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.5s ease, border-color 0.5s ease, color 0.5s ease, font-family 0.4s ease, transform 0.2s;
}

.preview-btn-primary:hover { transform: translateY(-2px); filter: brightness(1.1); }

.preview-btn-secondary {
  background-color: transparent;
  color: #e2e8f0;
  border: 2px solid #e2e8f0;
  padding: 12px 28px;
  border-radius: 8px;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: color 0.5s ease, border-color 0.5s ease, font-family 0.4s ease, transform 0.2s;
  opacity: 0.8;
}

.preview-btn-secondary:hover { transform: translateY(-2px); opacity: 1; }

/* ── Feature Cards ── */
.preview-cards-section {
  background-color: #f1f5f9;
  padding: 36px 44px;
  transition: background-color 0.5s ease;
}

.preview-section-title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 22px;
  transition: color 0.5s ease, font-family 0.4s ease;
}

.preview-cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.preview-card {
  background-color: #ffffff;
  border-radius: var(--radius-md);
  padding: 18px;
  transition: background-color 0.5s ease, transform 0.25s;
}

.preview-card:hover { transform: translateY(-3px); }

.preview-card-icon {
  width: 36px; height: 36px;
  background-color: #f97316;
  border-radius: 8px;
  margin-bottom: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px;
  transition: background-color 0.5s ease;
}

.preview-card-title {
  font-family: var(--font-heading);
  font-size: 0.88rem;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 6px;
  transition: color 0.5s ease, font-family 0.4s ease;
}

.preview-card-text {
  font-family: var(--font-body);
  font-size: 0.77rem;
  color: #0f172a;
  opacity: 0.7;
  line-height: 1.5;
  transition: color 0.5s ease, font-family 0.4s ease;
}

/* ── Stats bar ── */
.preview-stats {
  background-color: #1e293b;
  padding: 22px 44px;
  display: flex;
  gap: 0;
  justify-content: space-around;
  transition: background-color 0.5s ease;
}

.preview-stat {
  text-align: center;
}

.preview-stat-number {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 700;
  color: #e2e8f0;
  transition: color 0.5s ease, font-family 0.4s ease;
}

.preview-stat-label {
  font-family: var(--font-body);
  font-size: 0.72rem;
  color: #e2e8f0;
  opacity: 0.7;
  transition: color 0.5s ease, font-family 0.4s ease;
}

/* ══════════════════════════════════════════
   TOAST NOTIFICATION
══════════════════════════════════════════ */
.toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 12px 22px;
  border-radius: 50px;
  font-size: 0.82rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  z-index: 10000;
  pointer-events: none;
  transition: transform 0.4s cubic-bezier(0.34,1.56,0.64,1), opacity 0.35s ease;
  opacity: 0;
  white-space: nowrap;
  backdrop-filter: blur(10px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
}

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

.toast-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #4ade80;
  flex-shrink: 0;
}

/* ══════════════════════════════════════════
   FOOTER
══════════════════════════════════════════ */
.app-footer {
  grid-column: 1 / -1;
  text-align: center;
  padding: 18px;
  border-top: 1px solid var(--border);
  font-size: 0.72rem;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
}

.footer-crown {
  display: inline-block;
  animation: shimmer 3s ease-in-out infinite;
  background: linear-gradient(90deg, #7b61ff, #b46eff, #f472b6, #7b61ff);
  background-size: 200%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

/* ══════════════════════════════════════════
   TRAKTEER FLOATING BUTTON
   (dari footer-lite.md — reusable)
══════════════════════════════════════════ */
.fl-kopi {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 54px;
  height: 54px;
  background: #be1e2d;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9998;
  text-decoration: none;
  cursor: pointer;
  animation: fl-kopi-float 3.5s ease-in-out infinite;
  transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
  box-shadow: 0 4px 20px rgba(190, 30, 45, 0.35);
}
.fl-kopi:hover {
  transform: scale(1.12);
  animation: none;
  box-shadow: 0 6px 28px rgba(190, 30, 45, 0.5);
}
.fl-kopi:hover .fl-kopi-ring {
  animation: none;
  opacity: 0;
}
.fl-kopi img {
  width: 28px;
  height: 28px;
  object-fit: contain;
  display: block;
  pointer-events: none;
  animation: fl-kopi-wobble 4s ease-in-out infinite;
  transform-origin: center bottom;
}
.fl-kopi:hover img {
  animation: none;
  transform: rotate(0deg);
}
.fl-kopi-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1.5px solid rgba(190, 30, 45, 0.5);
  animation: fl-kopi-ripple 2.4s ease-out infinite;
  transition: opacity 0.3s ease;
}
.fl-kopi-r2 { animation-delay: 1.2s; }

@keyframes fl-kopi-ripple {
  0%   { transform: scale(1);   opacity: 0.7; }
  100% { transform: scale(2.0); opacity: 0; }
}
@keyframes fl-kopi-float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-7px); }
}
@keyframes fl-kopi-wobble {
  0%, 55%  { transform: rotate(0deg); }
  58%      { transform: rotate(-18deg); }
  61%      { transform: rotate(16deg); }
  64%      { transform: rotate(-12deg); }
  67%      { transform: rotate(10deg); }
  70%      { transform: rotate(-6deg); }
  73%      { transform: rotate(4deg); }
  76%, 100%{ transform: rotate(0deg); }
}

/* ══════════════════════════════════════════
   RESPONSIVE — MOBILE
══════════════════════════════════════════ */
@media (max-width: 900px) {
  .main-content {
    grid-template-columns: 1fr;
  }

  .left-panel {
    height: auto;
    position: static;
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding: 20px 16px;
  }

  .right-panel {
    padding: 20px 16px;
  }

  .topbar { padding: 14px 16px; }
  .topbar-hint .hint-text { display: none; }

  .preview-hero { padding: 32px 24px 28px; }
  .preview-cards-section { padding: 24px; }

  .preview-cards-grid { grid-template-columns: 1fr 1fr; }

  .preview-stats { padding: 18px 24px; gap: 12px; }

  .preview-nav-links { display: none; }
}

@media (max-width: 560px) {
  .preview-cards-grid { grid-template-columns: 1fr; }
  .preview-stats { flex-direction: column; gap: 14px; }

  /* Trakteer button mobile */
  .fl-kopi {
    bottom: 20px;
    right: 20px;
    width: 48px;
    height: 48px;
  }
  .fl-kopi img { width: 24px; height: 24px; }
}