/* TypingTeacher - Modern Online Typing Tutor & Certification Platform
   Design System & Custom Animations */

:root {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-card: rgba(30, 41, 59, 0.7);
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #475569;
  --accent: #6366f1;
  --accent-hover: #4f46e5;
  --accent-glow: rgba(99, 102, 241, 0.35);
  --success: #10b981;
  --error: #ef4444;
  --error-bg: rgba(239, 68, 68, 0.15);
  --warning: #f59e0b;
  --border-subtle: rgba(148, 163, 184, 0.12);
  --caret-color: #6366f1;
  --font-mono: 'JetBrains Mono', 'Fira Code', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.85);
  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-dim: #94a3b8;
  --accent: #4f46e5;
  --accent-hover: #4338ca;
  --accent-glow: rgba(79, 70, 229, 0.2);
  --success: #059669;
  --error: #dc2626;
  --error-bg: rgba(220, 38, 38, 0.1);
  --warning: #d97706;
  --border-subtle: rgba(100, 116, 139, 0.15);
  --caret-color: #4f46e5;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-main);
  transition: background-color 0.25s ease, color 0.25s ease;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Monospace Typing Box Styles */
.font-typing {
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
  font-variant-ligatures: none;
}

#typing-box,
#exam-typing-box {
  position: relative;
  height: 175px !important;
  min-height: 175px !important;
  max-height: 175px !important;
  overflow: hidden !important;
  user-select: none;
  contain: layout;
}

.words-wrapper {
  position: relative;
  width: 100%;
}

/* Character States in Typing Test */
.char {
  position: relative;
  transition: color 0.08s ease, background-color 0.08s ease;
  border-radius: 2px;
}

.char.untyped {
  color: var(--text-dim);
}

.char.correct {
  color: var(--success);
}

.char.incorrect {
  color: var(--error);
  background-color: var(--error-bg);
  text-decoration: underline wavy var(--error);
}

.char.extra {
  color: #f43f5e;
  opacity: 0.85;
}

/* Smooth Blinking / Smooth Caret */
.caret {
  position: absolute;
  width: 2.5px;
  height: 1.35em;
  background-color: var(--caret-color);
  border-radius: 2px;
  pointer-events: none;
  transition: left 0.09s cubic-bezier(0.2, 0, 0, 1), top 0.09s ease;
  box-shadow: 0 0 10px var(--accent-glow);
  animation: caret-blink 1s ease-in-out infinite;
  z-index: 10;
}

@keyframes caret-blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.2; }
}

.caret.typing {
  animation: none;
  opacity: 1;
}

/* Glassmorphic Cards */
.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
}

/* AdSense Slot Containers with strict dimensions to prevent CLS (Cumulative Layout Shift) */
.ad-slot-leaderboard {
  min-height: 90px;
  max-height: 100px;
  width: 100%;
  max-width: 728px;
  margin: 0 auto;
  contain: layout;
  background: rgba(148, 163, 184, 0.04);
  border: 1px dashed var(--border-subtle);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.ad-slot-sidebar {
  min-height: 250px;
  width: 100%;
  max-width: 300px;
  contain: layout;
  background: rgba(148, 163, 184, 0.04);
  border: 1px dashed var(--border-subtle);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.ad-slot-bottom {
  min-height: 90px;
  width: 100%;
  max-width: 970px;
  margin: 0 auto;
  contain: layout;
  background: rgba(148, 163, 184, 0.04);
  border: 1px dashed var(--border-subtle);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.ad-badge {
  position: absolute;
  top: 4px;
  right: 8px;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-dim);
  pointer-events: none;
}

/* Interactive Visual Keyboard */
.keyboard-container {
  user-select: none;
  perspective: 600px;
}

.key-cap {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  box-shadow: 0 3px 0 rgba(0, 0, 0, 0.25), 0 2px 4px rgba(0, 0, 0, 0.1);
  transition: transform 0.05s ease, background-color 0.1s ease, color 0.1s ease, box-shadow 0.05s ease;
  position: relative;
  text-align: center;
}

[data-theme="light"] .key-cap {
  box-shadow: 0 3px 0 rgba(148, 163, 184, 0.4), 0 2px 4px rgba(0, 0, 0, 0.04);
}

.key-cap.pressed {
  transform: translateY(2px);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.25);
  background-color: var(--accent);
  color: #ffffff;
}

.key-cap.target {
  background-color: var(--accent-glow);
  border-color: var(--accent);
  color: var(--text-main);
  animation: key-pulse 1.2s ease-in-out infinite alternate;
}

@keyframes key-pulse {
  0% { transform: translateY(0); box-shadow: 0 0 4px var(--accent); }
  100% { transform: translateY(-1px); box-shadow: 0 0 14px var(--accent); }
}

/* Finger Zone Colors */
.finger-l-pinky { border-bottom: 3px solid #ec4899; }
.finger-l-ring { border-bottom: 3px solid #f97316; }
.finger-l-middle { border-bottom: 3px solid #eab308; }
.finger-l-index { border-bottom: 3px solid #10b981; }
.finger-r-index { border-bottom: 3px solid #06b6d4; }
.finger-r-middle { border-bottom: 3px solid #3b82f6; }
.finger-r-ring { border-bottom: 3px solid #8b5cf6; }
.finger-r-pinky { border-bottom: 3px solid #d946ef; }
.finger-thumbs { border-bottom: 3px solid #6366f1; }

/* Dynamic Certificate Styles */
.certificate-frame {
  background: #ffffff;
  color: #1e293b;
  position: relative;
  box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.4);
  font-family: 'Cinzel', 'Times New Roman', Georgia, serif;
}

.cert-border-outer {
  border: 12px double #b45309;
}

.cert-border-inner {
  border: 2px solid #d97706;
}

/* Print Specific Styles for Certificate */
@media print {
  body {
    background: transparent !important;
    color: black !important;
    padding: 0 !important;
    margin: 0 !important;
  }
  .no-print, header, footer, .ad-slot-leaderboard, .ad-slot-sidebar, .ad-slot-bottom, button, .modal-backdrop {
    display: none !important;
  }
  .printable-certificate {
    position: absolute;
    left: 0;
    top: 0;
    width: 100vw !important;
    height: 100vh !important;
    margin: 0 !important;
    box-shadow: none !important;
    border: none !important;
    page-break-inside: avoid;
  }
  @page {
    size: landscape;
    margin: 0;
  }
}

/* Custom Scrollbar for lessons & text view */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--border-subtle);
  border-radius: 9999px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-dim);
}

/* Confetti particles */
.confetti-particle {
  position: fixed;
  width: 8px;
  height: 8px;
  pointer-events: none;
  z-index: 9999;
  border-radius: 2px;
  animation: confetti-fall 2.5s ease-out forwards;
}

@keyframes confetti-fall {
  0% {
    transform: translateY(0) rotate(0deg) scale(1);
    opacity: 1;
  }
  100% {
    transform: translateY(90vh) rotate(720deg) scale(0.3);
    opacity: 0;
  }
}

/* Dual Logo Display Switcher */
.logo-dark-mode {
  display: inline-block;
}
.logo-light-mode {
  display: none !important;
}
[data-theme="light"] .logo-dark-mode {
  display: none !important;
}
[data-theme="light"] .logo-light-mode {
  display: inline-block !important;
}

/* High Contrast Light Mode Overrides */
[data-theme="light"] body {
  background-color: #f8fafc;
  color: #0f172a;
}

[data-theme="light"] .glass-card {
  background: rgba(255, 255, 255, 0.96) !important;
  border-color: #e2e8f0 !important;
  box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.06) !important;
}

[data-theme="light"] .text-white,
[data-theme="light"] .text-slate-100,
[data-theme="light"] .text-slate-200 {
  color: #0f172a !important;
}

[data-theme="light"] .text-slate-300 {
  color: #334155 !important;
}

[data-theme="light"] .text-slate-400 {
  color: #475569 !important;
}

[data-theme="light"] .text-slate-500 {
  color: #64748b !important;
}

[data-theme="light"] .bg-slate-900,
[data-theme="light"] .bg-slate-950 {
  background-color: #ffffff !important;
  color: #0f172a !important;
}

[data-theme="light"] .bg-slate-900\/60,
[data-theme="light"] .bg-slate-900\/70,
[data-theme="light"] .bg-slate-900\/80,
[data-theme="light"] .bg-slate-900\/90 {
  background-color: rgba(255, 255, 255, 0.94) !important;
}

[data-theme="light"] .bg-slate-800 {
  background-color: #f1f5f9 !important;
  color: #0f172a !important;
}

[data-theme="light"] .bg-slate-800\/50,
[data-theme="light"] .bg-slate-800\/60,
[data-theme="light"] .bg-slate-800\/70,
[data-theme="light"] .bg-slate-800\/80 {
  background-color: #f8fafc !important;
}

[data-theme="light"] .border-slate-800,
[data-theme="light"] .border-slate-700 {
  border-color: #e2e8f0 !important;
}

[data-theme="light"] .divide-slate-800 > :not([hidden]) ~ :not([hidden]),
[data-theme="light"] .divide-slate-700 > :not([hidden]) ~ :not([hidden]) {
  border-color: #e2e8f0 !important;
}

[data-theme="light"] header.glass-card,
[data-theme="light"] footer {
  background: #ffffff !important;
  border-color: #e2e8f0 !important;
}

/* Typing text high contrast */
[data-theme="light"] .char.untyped {
  color: #94a3b8 !important;
}

[data-theme="light"] .char.correct {
  color: #059669 !important;
}

[data-theme="light"] .char.incorrect {
  color: #dc2626 !important;
  background-color: rgba(239, 68, 68, 0.12) !important;
}

[data-theme="light"] #typing-box,
[data-theme="light"] #exam-typing-box {
  background: #ffffff !important;
  border-color: #cbd5e1 !important;
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.03) !important;
}

[data-theme="light"] .key-cap {
  background-color: #ffffff !important;
  color: #1e293b !important;
  border-color: #cbd5e1 !important;
}

[data-theme="light"] .key-cap.pressed {
  background-color: #4f46e5 !important;
  color: #ffffff !important;
}

[data-theme="light"] .key-cap.target {
  background-color: #e0e7ff !important;
  border-color: #4f46e5 !important;
  color: #1e1b4b !important;
}

/* Form inputs & tables in light mode */
[data-theme="light"] input,
[data-theme="light"] select,
[data-theme="light"] textarea {
  background-color: #ffffff !important;
  color: #0f172a !important;
  border-color: #cbd5e1 !important;
}

[data-theme="light"] input::placeholder,
[data-theme="light"] textarea::placeholder {
  color: #94a3b8 !important;
}

/* Modals & dialogs in light mode */
[data-theme="light"] .modal-content,
[data-theme="light"] [role="dialog"],
[data-theme="light"] .fixed.inset-0 .glass-card {
  background-color: #ffffff !important;
  border-color: #e2e8f0 !important;
  color: #0f172a !important;
}

/* Preserve bright text inside primary action buttons and badges */
[data-theme="light"] .bg-indigo-600,
[data-theme="light"] .bg-indigo-500,
[data-theme="light"] .bg-emerald-600,
[data-theme="light"] .bg-emerald-500,
[data-theme="light"] .bg-rose-600,
[data-theme="light"] .bg-amber-600,
[data-theme="light"] .bg-gradient-to-r.from-indigo-600 {
  color: #ffffff !important;
}

[data-theme="light"] .bg-indigo-600 *,
[data-theme="light"] .bg-indigo-500 *,
[data-theme="light"] .bg-emerald-600 *,
[data-theme="light"] .bg-emerald-500 *,
[data-theme="light"] .bg-rose-600 *,
[data-theme="light"] .bg-gradient-to-r.from-indigo-600 * {
  color: #ffffff !important;
}

[data-theme="light"] a.bg-indigo-600,
[data-theme="light"] button.bg-indigo-600 {
  color: #ffffff !important;
}