/* ============================================
   SPEECH EZ SKOOL — Design System
   Extending the Speech EZ brand into a 
   community platform experience
   ============================================ */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=Inter:wght@300;400;500;600;700&display=swap');

/* --- CSS Custom Properties --- */
:root {
  /* Primary Palette (Speech EZ Teal) */
  --color-primary: #4ABFAF;
  --color-primary-light: #6DD5C7;
  --color-primary-dark: #339E90;
  --color-primary-50: #EDF9F7;
  --color-primary-100: #D4F1EC;
  --color-primary-200: #A8E3D9;
  --color-primary-600: #2D9A8B;
  --color-primary-700: #1F7A6D;
  --color-primary-800: #165B52;
  --color-primary-900: #0E3D37;

  /* Accent Palette (Coral) */
  --color-accent: #F28B6E;
  --color-accent-light: #F5A790;
  --color-accent-dark: #E0714F;
  --color-accent-50: #FFF3EF;
  --color-accent-100: #FDDDD3;

  /* Warm Neutrals */
  --color-cream: #FBF8F4;
  --color-cream-dark: #F3EDE5;
  --color-warm-white: #FEFCFA;
  --color-warm-gray: #B8AFA5;
  --color-warm-gray-dark: #8A8078;

  /* Text */
  --color-text: #2D3142;
  --color-text-light: #545A72;
  --color-text-muted: #8A8FA8;
  --color-text-faint: #B4B9CC;

  /* Navy */
  --color-navy: #1E2A3A;
  --color-navy-light: #2D3E52;
  --color-navy-50: #F0F2F5;
  --color-navy-100: #D8DCE5;

  /* Semantic Colors */
  --color-success: #4CAF78;
  --color-success-light: #E8F5EE;
  --color-warning: #F2C94C;
  --color-warning-light: #FFF9E6;
  --color-error: #E74C3C;
  --color-error-light: #FDECEB;
  --color-info: #5B9BD5;
  --color-info-light: #EBF3FB;

  /* Level Colors — Gamification */
  --color-level-1: #B8AFA5;
  --color-level-2: #4ABFAF;
  --color-level-3: #5B9BD5;
  --color-level-4: #9B59B6;
  --color-level-5: #F2C94C;
  --color-level-6: #E74C3C;

  /* Shadows */
  --shadow-xs: 0 1px 3px rgba(45, 49, 66, 0.04);
  --shadow-sm: 0 2px 8px rgba(45, 49, 66, 0.06);
  --shadow-md: 0 4px 20px rgba(45, 49, 66, 0.08);
  --shadow-lg: 0 8px 40px rgba(45, 49, 66, 0.1);
  --shadow-xl: 0 12px 60px rgba(45, 49, 66, 0.12);
  --shadow-glow: 0 0 40px rgba(74, 191, 175, 0.15);
  --shadow-glow-accent: 0 0 40px rgba(242, 139, 110, 0.15);
  --shadow-inner: inset 0 2px 4px rgba(45, 49, 66, 0.06);

  /* Glass */
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-bg-heavy: rgba(255, 255, 255, 0.85);
  --glass-border: rgba(255, 255, 255, 0.3);
  --glass-blur: blur(20px);

  /* Typography */
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-md: 1.125rem;
  --font-size-lg: 1.25rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 2.5rem;
  --font-size-4xl: 3rem;

  /* Spacing */
  --space-2xs: 0.125rem;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Border Radius */
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-2xl: 32px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Layout */
  --sidebar-width: 260px;
  --sidebar-collapsed-width: 72px;
  --header-height: 64px;
  --content-max-width: 800px;
  --content-wide-max-width: 1100px;
}

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

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

body {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-cream);
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

ul, ol {
  list-style: none;
}

input, textarea, select, button {
  font-family: inherit;
  font-size: inherit;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-navy);
}

h1 { font-size: var(--font-size-3xl); font-weight: 800; letter-spacing: -0.03em; }
h2 { font-size: var(--font-size-2xl); font-weight: 700; letter-spacing: -0.02em; }
h3 { font-size: var(--font-size-xl); font-weight: 600; }
h4 { font-size: var(--font-size-lg); font-weight: 600; }
h5 { font-size: var(--font-size-md); font-weight: 600; }
h6 { font-size: var(--font-size-base); font-weight: 600; }

p { margin-bottom: var(--space-sm); color: var(--color-text-light); }

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

.text-primary { color: var(--color-primary); }
.text-accent { color: var(--color-accent); }
.text-muted { color: var(--color-text-muted); }
.text-sm { font-size: var(--font-size-sm); }
.text-xs { font-size: var(--font-size-xs); }

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  font-family: var(--font-heading);
  font-size: var(--font-size-sm);
  font-weight: 600;
  padding: 10px 24px;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  line-height: 1;
  white-space: nowrap;
  outline: none;
}

.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn:focus-visible { box-shadow: 0 0 0 3px rgba(74, 191, 175, 0.3); }

.btn--primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: white;
  box-shadow: 0 4px 16px rgba(74, 191, 175, 0.3);
}
.btn--primary:hover { box-shadow: 0 6px 24px rgba(74, 191, 175, 0.4); color: white; }

.btn--accent {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
  color: white;
  box-shadow: 0 4px 16px rgba(242, 139, 110, 0.3);
}
.btn--accent:hover { box-shadow: 0 6px 24px rgba(242, 139, 110, 0.4); color: white; }

.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary-200);
}
.btn--outline:hover { background: var(--color-primary-50); border-color: var(--color-primary); }

.btn--ghost {
  background: transparent;
  color: var(--color-text-light);
  padding: 8px 16px;
}
.btn--ghost:hover { background: var(--color-cream-dark); color: var(--color-text); }

.btn--danger {
  background: var(--color-error);
  color: white;
}

.btn--sm { font-size: var(--font-size-xs); padding: 7px 16px; }
.btn--lg { font-size: var(--font-size-base); padding: 14px 32px; }
.btn--full { width: 100%; }
.btn--icon { padding: 10px; border-radius: var(--radius-md); }

.btn-group { display: flex; gap: var(--space-sm); flex-wrap: wrap; }

/* --- Form Elements --- */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-navy);
  margin-bottom: var(--space-xs);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--color-navy-100);
  border-radius: var(--radius-md);
  background: white;
  color: var(--color-text);
  font-size: var(--font-size-base);
  transition: all var(--transition-fast);
  outline: none;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(74, 191, 175, 0.15);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-faint);
}

.form-textarea {
  resize: vertical;
  min-height: 100px;
  line-height: 1.6;
}

/* --- Cards --- */
.card {
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(0, 0, 0, 0.04);
  transition: all var(--transition-base);
  overflow: hidden;
}

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

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

.card--interactive:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.card__body {
  padding: var(--space-lg);
}

.card__header {
  padding: var(--space-lg);
  border-bottom: 1px solid var(--color-navy-50);
}

.card__footer {
  padding: var(--space-md) var(--space-lg);
  border-top: 1px solid var(--color-navy-50);
  background: var(--color-cream);
}

/* --- Badges & Pills --- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-heading);
  font-size: var(--font-size-xs);
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge--primary { background: var(--color-primary-100); color: var(--color-primary-700); }
.badge--accent { background: var(--color-accent-100); color: var(--color-accent-dark); }
.badge--success { background: var(--color-success-light); color: var(--color-success); }
.badge--warning { background: var(--color-warning-light); color: #B8860B; }
.badge--navy { background: var(--color-navy-100); color: var(--color-navy); }
.badge--level-1 { background: #f0ede9; color: var(--color-level-1); }
.badge--level-2 { background: var(--color-primary-100); color: var(--color-level-2); }
.badge--level-3 { background: #e3ecf5; color: var(--color-level-3); }
.badge--level-4 { background: #efe3f5; color: var(--color-level-4); }
.badge--level-5 { background: var(--color-warning-light); color: #B8860B; }
.badge--level-6 { background: var(--color-error-light); color: var(--color-level-6); }

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--font-size-sm);
  font-weight: 500;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  background: var(--color-cream);
  color: var(--color-text-light);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
}

.pill:hover {
  background: var(--color-primary-50);
  color: var(--color-primary);
}

.pill--active {
  background: var(--color-primary-100);
  color: var(--color-primary-700);
  border-color: var(--color-primary-200);
}

/* --- Avatar --- */
.avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--font-size-sm);
  color: white;
  flex-shrink: 0;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
}

.avatar--sm { width: 32px; height: 32px; font-size: var(--font-size-xs); }
.avatar--lg { width: 56px; height: 56px; font-size: var(--font-size-lg); }
.avatar--xl { width: 80px; height: 80px; font-size: var(--font-size-2xl); }

.avatar--accent { background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark)); }
.avatar--navy { background: linear-gradient(135deg, var(--color-navy), var(--color-navy-light)); }

.avatar--bordered {
  border: 3px solid white;
  box-shadow: var(--shadow-sm);
}

/* --- Progress Bar --- */
.progress {
  width: 100%;
  height: 8px;
  background: var(--color-navy-50);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress__fill {
  height: 100%;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.progress--accent .progress__fill {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
}

.progress--sm { height: 4px; }
.progress--lg { height: 12px; }

/* --- Stat Card --- */
.stat {
  text-align: center;
}

.stat__number {
  font-family: var(--font-heading);
  font-size: var(--font-size-2xl);
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
}

.stat__label {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-xs);
}

/* --- Empty State --- */
.empty-state {
  text-align: center;
  padding: var(--space-4xl) var(--space-xl);
}

.empty-state__icon {
  font-size: 48px;
  margin-bottom: var(--space-md);
  opacity: 0.6;
}

.empty-state__title {
  font-size: var(--font-size-lg);
  color: var(--color-navy);
  margin-bottom: var(--space-sm);
}

.empty-state__text {
  color: var(--color-text-muted);
  max-width: 400px;
  margin: 0 auto var(--space-xl);
}

/* --- Tab Navigation --- */
.tabs {
  display: flex;
  gap: 2px;
  border-bottom: 2px solid var(--color-navy-50);
  margin-bottom: var(--space-xl);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.tab {
  font-family: var(--font-heading);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  padding: var(--space-md) var(--space-lg);
  border: none;
  background: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  white-space: nowrap;
}

.tab:hover {
  color: var(--color-text);
}

.tab--active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  font-weight: 600;
}

/* --- Dropdown --- */
.dropdown {
  position: relative;
}

.dropdown__menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 200px;
  background: white;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(0, 0, 0, 0.06);
  padding: var(--space-xs);
  z-index: 100;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--transition-fast);
}

.dropdown--open .dropdown__menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown__item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  color: var(--color-text);
  cursor: pointer;
  transition: background var(--transition-fast);
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}

.dropdown__item:hover {
  background: var(--color-primary-50);
  color: var(--color-primary-700);
}

/* --- Modal --- */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(30, 42, 58, 0.5);
  backdrop-filter: blur(4px);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.modal-overlay--active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: white;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  overflow-y: auto;
  transform: scale(0.95) translateY(10px);
  transition: transform var(--transition-base);
}

.modal-overlay--active .modal {
  transform: scale(1) translateY(0);
}

.modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg) var(--space-xl);
  border-bottom: 1px solid var(--color-navy-50);
}

.modal__title {
  font-size: var(--font-size-lg);
}

.modal__close {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  border: none;
  background: var(--color-cream);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--color-text-muted);
  transition: all var(--transition-fast);
}

.modal__close:hover {
  background: var(--color-navy-50);
  color: var(--color-text);
}

.modal__body {
  padding: var(--space-xl);
}

.modal__footer {
  padding: var(--space-md) var(--space-xl);
  border-top: 1px solid var(--color-navy-50);
  display: flex;
  justify-content: flex-end;
  gap: var(--space-sm);
}

/* --- Toast Notifications --- */
.toast-container {
  position: fixed;
  top: calc(var(--header-height) + 16px);
  right: 16px;
  z-index: 10000;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  background: white;
  box-shadow: var(--shadow-lg);
  font-size: var(--font-size-sm);
  font-weight: 500;
  animation: toastSlideIn 0.3s ease-out;
  max-width: 400px;
}

.toast--success { border-left: 4px solid var(--color-success); }
.toast--error { border-left: 4px solid var(--color-error); }
.toast--info { border-left: 4px solid var(--color-info); }
.toast--xp { border-left: 4px solid var(--color-primary); background: var(--color-primary-50); }

@keyframes toastSlideIn {
  from { opacity: 0; transform: translateX(100px); }
  to { opacity: 1; transform: translateX(0); }
}

.toast--exit {
  animation: toastSlideOut 0.3s ease-in forwards;
}

@keyframes toastSlideOut {
  to { opacity: 0; transform: translateX(100px); }
}

/* --- Utility Animations --- */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

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

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.9); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.animate-fade-in { animation: fadeIn 0.3s ease-out; }
.animate-slide-up { animation: slideUp 0.4s ease-out; }
.animate-scale-in { animation: scaleIn 0.3s ease-out; }

/* --- Skeleton Loading --- */
.skeleton {
  background: linear-gradient(90deg, var(--color-navy-50) 25%, var(--color-cream) 50%, var(--color-navy-50) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

.skeleton--text { height: 14px; width: 80%; margin-bottom: 8px; }
.skeleton--title { height: 20px; width: 60%; margin-bottom: 12px; }
.skeleton--avatar { width: 40px; height: 40px; border-radius: var(--radius-full); }
.skeleton--card { height: 200px; border-radius: var(--radius-lg); }

/* --- Scrollbar --- */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--color-warm-gray);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-warm-gray-dark);
}

/* --- Selection --- */
::selection {
  background: var(--color-primary-200);
  color: var(--color-navy);
}

/* --- Focus Visible --- */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* --- Screen Reader Only --- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}