/* ==========================================================================
   Character Counter Pro - Design System & Stylesheet
   Modern, Ultra-Fast, Responsive, Dark & Light Mode
   ========================================================================== */

:root {
  /* Color Palette - Dark Mode Default (High Contrast, Sleek SaaS) */
  --bg-primary: #0b0f19;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.75);
  --bg-card-hover: rgba(31, 41, 55, 0.85);
  --bg-input: #0e1526;
  --bg-input-focus: #111d35;
  --bg-toolbar: #131c31;

  --border-color: rgba(255, 255, 255, 0.08);
  --border-focus: #6366f1;
  --border-subtle: rgba(255, 255, 255, 0.04);

  --text-primary: #f9fafb;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  --text-inverted: #0f172a;

  /* Brand Accents */
  --accent-primary: #6366f1;
  --accent-primary-hover: #4f46e5;
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
  --accent-glow: rgba(99, 102, 241, 0.25);

  --accent-emerald: #10b981;
  --accent-sky: #0ea5e9;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;
  --accent-violet: #8b5cf6;

  /* Status Colors */
  --status-normal: #10b981;
  --status-warning: #f59e0b;
  --status-exceeded: #ef4444;

  /* Shadows & Glassmorphism */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.25);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 25px rgba(99, 102, 241, 0.15);
  --glass-blur: blur(16px);

  /* Dimensions & Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  --max-width: 1360px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 350ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Light Theme Variables */
[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.88);
  --bg-card-hover: #ffffff;
  --bg-input: #f1f5f9;
  --bg-input-focus: #ffffff;
  --bg-toolbar: #f8fafc;

  --border-color: rgba(0, 0, 0, 0.08);
  --border-focus: #6366f1;
  --border-subtle: rgba(0, 0, 0, 0.04);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --text-inverted: #f8fafc;

  --accent-glow: rgba(99, 102, 241, 0.12);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 12px 24px -4px rgba(0, 0, 0, 0.08);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.08);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Plus Jakarta Sans', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.5;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  background-image: 
    radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.08) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(168, 85, 247, 0.06) 0px, transparent 50%);
  background-attachment: fixed;
}

/* Global Container */
.app-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem 1.25rem;
}

/* Header & Nav */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1.5rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  text-decoration: none;
  color: inherit;
}

.brand-logo {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  box-shadow: 0 4px 12px var(--accent-glow);
  transition: transform var(--transition-bounce);
}

.brand-wrapper:hover .brand-logo {
  transform: rotate(-4deg) scale(1.05);
}

.brand-text h1 {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.brand-badge {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-full);
  background: rgba(99, 102, 241, 0.15);
  color: var(--accent-primary);
  border: 1px solid rgba(99, 102, 241, 0.3);
  -webkit-text-fill-color: var(--accent-primary);
}

.brand-tagline {
  font-size: 0.82rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Base Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.55rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: var(--bg-secondary);
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
}

.btn:hover {
  background: var(--bg-card-hover);
  border-color: rgba(255, 255, 255, 0.18);
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: #ffffff;
  box-shadow: 0 2px 8px var(--accent-glow);
}

.btn-primary:hover {
  background: var(--accent-primary-hover);
  border-color: var(--accent-primary-hover);
  box-shadow: 0 4px 14px var(--accent-glow);
}

.btn-icon {
  padding: 0.55rem;
  border-radius: var(--radius-md);
}

.btn-danger-ghost {
  color: var(--accent-rose);
}
.btn-danger-ghost:hover {
  background: rgba(244, 63, 94, 0.1);
  border-color: rgba(244, 63, 94, 0.3);
}

/* Primary Live Dashboard Stats Grid (Hero Section) */
.hero-stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.9rem;
  margin-bottom: 1.5rem;
}

.stat-card-hero {
  background: var(--bg-card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.15rem 1.25rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-normal);
}

.stat-card-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: transparent;
  transition: background var(--transition-normal);
}

.stat-card-hero:hover {
  transform: translateY(-2px);
  border-color: rgba(99, 102, 241, 0.3);
  box-shadow: var(--shadow-md), var(--shadow-glow);
}

.stat-card-hero.accent-primary::before { background: var(--accent-gradient); }
.stat-card-hero.accent-sky::before { background: var(--accent-sky); }
.stat-card-hero.accent-emerald::before { background: var(--accent-emerald); }
.stat-card-hero.accent-violet::before { background: var(--accent-violet); }
.stat-card-hero.accent-amber::before { background: var(--accent-amber); }
.stat-card-hero.accent-rose::before { background: var(--accent-rose); }

.stat-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
}

.stat-icon-pill {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--border-subtle);
  color: var(--text-secondary);
}

.stat-value {
  font-size: 2.1rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  font-feature-settings: "tnum";
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
  margin-bottom: 0.25rem;
}

.stat-subtext {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

/* Main Workspace Grid (Editor + Sidebar Tabs) */
.workspace-grid {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 1.5rem;
  align-items: start;
}

@media (max-width: 1100px) {
  .workspace-grid {
    grid-template-columns: 1fr;
  }
}

/* Editor Container */
.editor-container {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition-fast);
}

.editor-container:focus-within {
  border-color: var(--border-focus);
  box-shadow: var(--shadow-md), 0 0 0 3px rgba(99, 102, 241, 0.15);
}

/* Editor Toolbar */
.editor-toolbar {
  background: var(--bg-toolbar);
  border-bottom: 1px solid var(--border-color);
  padding: 0.65rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.toolbar-group {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.tool-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-secondary);
  padding: 0.4rem 0.65rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: all var(--transition-fast);
}

.tool-btn:hover {
  background: var(--border-subtle);
  color: var(--text-primary);
  border-color: var(--border-color);
}

.tool-btn.active {
  background: rgba(99, 102, 241, 0.15);
  color: var(--accent-primary);
  border-color: rgba(99, 102, 241, 0.3);
}

.toolbar-divider {
  width: 1px;
  height: 20px;
  background: var(--border-color);
  margin: 0 0.2rem;
}

/* Main Textarea */
.textarea-wrapper {
  position: relative;
  width: 100%;
}

.main-textarea {
  width: 100%;
  min-height: 380px;
  max-height: 800px;
  padding: 1.25rem 1.25rem 2.5rem 1.25rem;
  font-family: inherit;
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--text-primary);
  background: var(--bg-input);
  border: none;
  outline: none;
  resize: vertical;
  transition: background-color var(--transition-normal);
}

.main-textarea::placeholder {
  color: var(--text-muted);
  font-weight: 400;
}

/* Editor Status Bar Footer */
.editor-status-bar {
  background: var(--bg-toolbar);
  border-top: 1px solid var(--border-color);
  padding: 0.65rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 500;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.status-left, .status-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.status-indicator {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-emerald);
}

.status-dot.saving {
  background: var(--accent-amber);
  animation: pulse 1s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(1.2); }
}

/* Secondary Tools Row (Case Converter, Cleanups) */
.quick-tools-row {
  margin-top: 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 0.85rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.quick-tools-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.case-buttons-group {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.case-btn {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.35rem 0.65rem;
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.case-btn:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
  border-color: rgba(99, 102, 241, 0.3);
}

/* Detailed Analytics Cards Section Below Editor */
.detailed-analytics-section {
  margin-top: 2rem;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.section-title {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.metrics-dense-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 0.85rem;
}

.dense-metric-card {
  background: var(--bg-card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.9rem 1.1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: all var(--transition-fast);
}

.dense-metric-card:hover {
  border-color: rgba(99, 102, 241, 0.25);
  background: var(--bg-card-hover);
  transform: translateY(-1px);
}

.dense-metric-info {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.dense-metric-name {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.dense-metric-desc {
  font-size: 0.7rem;
  color: var(--text-muted);
}

.dense-metric-val {
  font-size: 1.35rem;
  font-weight: 800;
  font-feature-settings: "tnum";
  font-variant-numeric: tabular-nums;
  color: var(--text-primary);
}

/* Sidebar Platforms & Tools Column */
.sidebar-panel {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

/* Card Container */
.sidebar-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
}

.sidebar-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  padding-bottom: 0.65rem;
  border-bottom: 1px solid var(--border-color);
}

.sidebar-card-title {
  font-size: 0.95rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Platform Meter Card Items */
.platform-meter-item {
  padding: 0.9rem;
  border-radius: var(--radius-md);
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  margin-bottom: 0.75rem;
  transition: all var(--transition-fast);
}

.platform-meter-item:last-child {
  margin-bottom: 0;
}

.platform-meter-item:hover {
  border-color: rgba(99, 102, 241, 0.3);
}

.platform-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}

.platform-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  font-weight: 700;
}

.platform-brand-icon {
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
}

.platform-counter {
  font-size: 0.82rem;
  font-weight: 700;
  font-feature-settings: "tnum";
  font-variant-numeric: tabular-nums;
  color: var(--text-secondary);
}

.platform-counter .limit-total {
  color: var(--text-muted);
  font-weight: 500;
}

/* Progress Bar */
.progress-bar-bg {
  width: 100%;
  height: 6px;
  background: var(--border-subtle);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-bottom: 0.45rem;
}

.progress-bar-fill {
  height: 100%;
  border-radius: var(--radius-full);
  transition: width 200ms ease, background-color var(--transition-fast);
}

.progress-bar-fill.normal { background: var(--status-normal); }
.progress-bar-fill.warning { background: var(--status-warning); }
.progress-bar-fill.exceeded { background: var(--status-exceeded); }

.platform-meta-info {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 500;
}

.platform-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.68rem;
  font-weight: 700;
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-full);
}

.platform-badge.normal {
  background: rgba(16, 185, 129, 0.12);
  color: var(--status-normal);
}
.platform-badge.warning {
  background: rgba(245, 158, 11, 0.12);
  color: var(--status-warning);
}
.platform-badge.exceeded {
  background: rgba(239, 68, 68, 0.12);
  color: var(--status-exceeded);
}

/* SMS Encoding Badge */
.sms-badge {
  font-size: 0.68rem;
  font-weight: 700;
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-sm);
  background: rgba(99, 102, 241, 0.15);
  color: var(--accent-primary);
}

/* Keyword Density Table */
.keywords-table-wrapper {
  max-height: 260px;
  overflow-y: auto;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

.keywords-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
  text-align: left;
}

.keywords-table th {
  background: var(--bg-toolbar);
  padding: 0.5rem 0.75rem;
  font-weight: 700;
  color: var(--text-secondary);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  position: sticky;
  top: 0;
  border-bottom: 1px solid var(--border-color);
}

.keywords-table td {
  padding: 0.45rem 0.75rem;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-primary);
}

.keywords-table tr:hover td {
  background: var(--border-subtle);
}

.keyword-density-bar-bg {
  width: 60px;
  height: 5px;
  background: var(--border-subtle);
  border-radius: var(--radius-full);
  overflow: hidden;
  display: inline-block;
  vertical-align: middle;
  margin-right: 0.4rem;
}

.keyword-density-bar-fill {
  height: 100%;
  background: var(--accent-primary);
  border-radius: var(--radius-full);
}

/* Speech & Voice Dictation Control Banner */
.voice-banner {
  display: none;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
  color: var(--accent-rose);
  font-size: 0.85rem;
  font-weight: 600;
}

.voice-banner.active {
  display: flex;
  animation: pulse 1.5s infinite;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  z-index: 9999;
  pointer-events: none;
}

.toast {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  padding: 0.75rem 1.1rem;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  transform: translateY(20px);
  opacity: 0;
  transition: all var(--transition-bounce);
  pointer-events: auto;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

.toast.toast-success {
  border-left: 4px solid var(--accent-emerald);
}

.toast.toast-info {
  border-left: 4px solid var(--accent-sky);
}

/* Footer Section */
.footer {
  margin-top: 3.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  color: var(--text-muted);
  font-size: 0.82rem;
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.footer-link {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--accent-primary);
}

/* Responsive Breakpoints */
@media (max-width: 768px) {
  .app-container {
    padding: 1rem 0.75rem 2rem 0.75rem;
  }
  .header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
  .header-actions {
    width: 100%;
    justify-content: space-between;
  }
  .hero-stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .stat-value {
    font-size: 1.65rem;
  }
  .main-textarea {
    min-height: 280px;
  }
  .quick-tools-row {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .hero-stats-grid {
    grid-template-columns: 1fr;
  }
}