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

/* -----------------------------------------
   Design Tokens
   ----------------------------------------- */
:root {
  /* Main container */
  --main-max-w: 1200px;
  --main-pt: 2rem; /* default top padding */
  --main-pb: 0rem; /* default bottom padding */
  --main-px: 1.25rem;

  /* Colors used throughout (left as-is to preserve your palette) */
  --brand-green-500: #10b981;
  --brand-green-600: #059669;
  --brand-blue-500: #3b82f6;
  --brand-blue-800: #1e40af;
  --brand-sky-400: #22d3ee;
  --brand-emerald-400: #4ade80;
  --brand-emerald-500: #22c55e;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #dee2e6;
  --gray-500: #6b7280;
  --gray-600: #605e5c;
  --gray-700: #495057;
  --gray-800: #323130;
  --text-dark: #2c3e50;
}

/* -----------------------------------------
   Base / Global
   ----------------------------------------- */

/* Main container: single source of truth */
.main .block-container,
.main > div {
  max-width: var(--main-max-w);
  margin: 0 auto;
  padding: var(--main-pt) var(--main-px) var(--main-pb);
}

/* Typography */
h1,
h2,
h3 {
  color: var(--text-dark);
}

/* Hide Streamlit default elements (kept once) */
#MainMenu,
footer,
header {
  visibility: hidden;
}

/* -----------------------------------------
   Buttons (shared)
   ----------------------------------------- */
.stButton > button {
  border-radius: 8px;
  border: none;
  font-weight: 600;
  transition: all 0.3s ease;
  background: var(--brand-green-500);
  color: #fff;
  padding: 0.5rem 1rem;
}

.stButton > button:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  background: var(--brand-green-600);
}

/* Light gray styling for review buttons - multiple targets preserved */
.stButton > button:has-text("Review"),
.stButton > button[aria-label*="Review"],
div[data-testid*="lesson_review"] button {
  background-color: #f8f9fa !important;
  color: #6c757d !important;
  border: 1px solid #dee2e6 !important;
}

.stButton > button:has-text("Review"):hover,
.stButton > button[aria-label*="Review"]:hover,
div[data-testid*="lesson_review"] button:hover {
  background-color: #e9ecef !important;
  color: #495057 !important;
  transform: translateY(-1px);
}

button[kind="secondary"] {
  background-color: #f8f9fa !important;
  color: #6c757d !important;
  border: 1px solid #dee2e6 !important;
}
button[kind="secondary"]:hover {
  background-color: #e9ecef !important;
  color: #495057 !important;
}

/* -----------------------------------------
   Welcome Card
   ----------------------------------------- */
.welcome-card {
  background: linear-gradient(to right, #4ade80, #22d3ee);
  padding: 2rem;
  border-radius: 15px;
  color: white;
  text-align: center;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}
.welcome-btn {
  background: #fff;
  color: #111;
  padding: 10px 20px;
  border-radius: 8px;
  border: none;
  font-weight: bold;
  cursor: pointer;
  transition: background 0.2s;
}
.welcome-btn:hover {
  background: #e0e0e0;
}

/* -----------------------------------------
   XP Card
   ----------------------------------------- */
.xp-card {
  background: var(--brand-blue-500);
  padding: 1rem;
  border-radius: 12px;
  color: white;
  position: relative;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}
.xp-level {
  font-weight: bold;
  color: #0b612a;
}
.xp-text {
  position: absolute;
  right: 1rem;
  top: 1rem;
}
.xp-bar {
  background: var(--brand-blue-800);
  height: 12px;
  border-radius: 8px;
  margin-top: 0.5rem;
}
.xp-fill {
  background: var(--brand-emerald-500);
  height: 12px;
  border-radius: 8px;
  transition: width 0.3s ease-in-out;
}

/* -----------------------------------------
   Daily Challenge
   ----------------------------------------- */
.challenge-card {
  background: linear-gradient(135deg, #d946ef, #ec4899);
  padding: 1.5rem;
  border-radius: 12px;
  color: white;
  position: relative;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}
.challenge-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.challenge-difficulty {
  background: rgba(255, 255, 255, 0.2);
  padding: 0.2rem 0.8rem;
  border-radius: 12px;
  font-size: 0.85rem;
}
.challenge-progress {
  background: rgba(255, 255, 255, 0.3);
  height: 10px;
  border-radius: 8px;
  margin: 1rem 0;
}
.challenge-fill {
  background: var(--brand-emerald-500);
  height: 10px;
  border-radius: 8px;
  transition: width 0.3s ease-in-out;
}
.challenge-percent {
  position: absolute;
  right: 1.5rem;
  top: 7rem;
}
.challenge-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 1rem;
}
.challenge-btn {
  background: rgba(255, 255, 255, 0.2);
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  color: white;
  font-weight: bold;
  cursor: pointer;
  transition: background 0.2s;
}
.challenge-btn:hover {
  background: rgba(255, 255, 255, 0.3);
}

/* -----------------------------------------
   Game Card
   ----------------------------------------- */
.game-card {
  background: #ffffff;
  padding: 1.5rem;
  border-radius: 12px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  text-align: center;
}
.game-card img {
  margin-bottom: 1rem;
}
.game-difficulty {
  background-color: lightgray;
  padding: 5px;
  border-radius: 5px;
  display: inline-block;
}
.game-difficulty.easy {
  background-color: lightgreen;
}
.game-difficulty.medium {
  background-color: #ffb347;
}
.game-difficulty.hard {
  background-color: lightcoral;
}
.game-btn {
  background: #10b981;
  color: white;
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  font-weight: bold;
  cursor: pointer;
  transition: background 0.2s;
}
.game-btn:hover {
  background: #059669;
}

/* -----------------------------------------
   Leaderboard
   ----------------------------------------- */
.leaderboard-card {
  background: var(--gray-50);
  padding: 1.5rem;
  border-radius: 12px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}
.leaderboard-item {
  margin-bottom: 0.5rem;
}
.leaderboard-you {
  color: var(--brand-green-500);
  font-weight: bold;
}

/* -----------------------------------------
   Tips
   ----------------------------------------- */
.tips-card {
  background: var(--gray-50);
  padding: 1.5rem;
  border-radius: 12px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}
.tips-item {
  margin-bottom: 0.5rem;
}

/* -----------------------------------------
   lesson.py CSS
   ----------------------------------------- */
.stMetric {
  background-color: #f8f9fa;
  padding: 1rem;
  border-radius: 8px;
  border-left: 4px solid #007bff;
}
.stProgress > div > div {
  background-color: #007bff;
}

.lesson-card {
  transition: all 0.3s ease;
  cursor: pointer;
}
.lesson-card:hover {
  transform: translateY(-4px) !important;
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15) !important;
  border-color: #0078d4 !important;
}

.topic-content {
  font-size: 1.25rem;
  line-height: 1.8;
  padding: 1.5rem;
  background: #fffef5;
  border-radius: 16px;
  border: 2px solid #f0e68c;
  margin-bottom: 1.5rem;
  font-family: "Comic Sans MS", "Segoe UI", Arial, sans-serif;
}
.topic-content p {
  margin-bottom: 1rem;
}
.topic-content ul,
.topic-content ol {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}

/* buttons */
.topic-nav-btn button {
  font-size: 1.3rem;
  font-weight: 600;
  padding: 1rem;
  border-radius: 999px;
  transition: all 0.2s ease-in-out;
  border: none;
  width: 100%;
  height: 3.5rem;
}
/* Previous button (pink, left) */
.prev-btn button {
  background-color: #ff99cc !important;
  color: white !important;
  text-align: left;
}
/* Next button (blue, right) */
.next-btn button {
  background-color: #66ccff !important;
  color: white !important;
  text-align: right;
}
.topic-nav-btn button:hover {
  transform: scale(1.05);
  opacity: 0.9;
}

/* -----------------------------------------
   code.py
   ----------------------------------------- */
.join-class-container {
  max-width: 600px;
  margin: 2rem auto;
  padding: 0 1rem;
}
.header-text {
  text-align: center;
  color: #605e5c;
  font-size: 18px;
  margin-bottom: 2rem;
  line-height: 1.5;
}
.join-card {
  background: white;
  border: 1px solid #e1e5e9;
  border-radius: 12px;
  padding: 2rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  margin-bottom: 1rem;
}
.card-header {
  display: flex;
  align-items: center;
  margin-bottom: 1rem;
}
.card-icon {
  font-size: 24px;
  margin-right: 12px;
  color: #323130;
}
.card-title {
  font-size: 24px;
  font-weight: 600;
  color: #323130;
  margin: 0;
}
.card-subtitle {
  color: #605e5c;
  font-size: 16px;
  margin-bottom: 1.5rem;
  line-height: 1.4;
}
.input-container {
  margin-bottom: 1.5rem;
}
.footer-text {
  text-align: center;
  color: #605e5c;
  font-size: 14px;
  margin-top: 1rem;
  line-height: 1.4;
}
.stTextInput > div > div > input {
  border-radius: 8px;
  border: 1px solid #d1d5db;
  padding: 12px 16px;
  font-size: 16px;
}
.stTextInput > div > div > input:focus {
  border-color: #0078d4;
  box-shadow: 0 0 0 2px rgba(0, 120, 212, 0.2);
}

/* -----------------------------------------
   Teacher Dashboard
   ----------------------------------------- */

/* Header styling with gradient */
.header-container {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  padding: 2rem;
  border-radius: 1rem;
  margin-bottom: 2rem;
  color: white;
  position: relative;
}
.header-content {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  width: 100%;
}
.header-left {
  flex: 1;
}
.header-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: white;
}
.header-subtitle {
  font-size: 1.1rem;
  opacity: 0.9;
  color: white;
}

/* Metric cards (dashboard version) */
.metric-card {
  background: white;
  padding: 1.5rem;
  border-radius: 1rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  border: 1px solid #f3f4f6;
  text-align: center;
  margin-bottom: 1rem;
}
.metric-icon {
  font-size: 2rem;
  color: var(--brand-green-500);
}
.metric-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--brand-green-500);
}
.metric-label {
  font-size: 0.9rem;
  color: #6b7280;
  font-weight: 500;
}

/* Chart containers */
.chart-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: #1f2937;
}

/* Progress bars */
.progress-label {
  font-size: 0.9rem;
  color: #6b7280;
}

/* Activity section */
.activity-item {
  padding: 0.75rem;
  background: #f9fafb;
  border-radius: 0.5rem;
  margin-bottom: 0.5rem;
  border-left: 3px solid var(--brand-green-500);
}

/* Quick actions */
.quick-action-btn {
  width: 100%;
  margin-bottom: 0.5rem;
  background: #f3f4f6;
  border: none;
  padding: 0.75rem;
  border-radius: 0.5rem;
  text-align: left;
  font-weight: 500;
}
.quick-action-btn:hover {
  background: #e5e7eb;
}

.main .block-container {
  padding-top: 4rem;
  padding-bottom: 0rem;
}

/* -----------------------------------------
   Debt Dilemma (Game)
   ----------------------------------------- */
.game-header {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: 1.5rem;
  border-radius: 15px;
  color: white;
  text-align: center;
  margin-bottom: 2rem;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}
.game-title {
  font-size: 2.5rem;
  font-weight: bold;
  margin-bottom: 0.5rem;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.metric-card {
  background: white;
  padding: 1rem;
  border-radius: 8px;
  text-align: center;
  margin: 0.5rem 0;
  border: 1px solid #e0e0e0;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}
.metric-card h2,
.metric-card h3,
.metric-card h4 {
  margin: 0.25rem 0;
  color: #333;
}
.metric-card small {
  color: #666;
}

.stButton > button:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}
.success-btn > button {
  background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%) !important;
}
.warning-btn > button {
  background: linear-gradient(135deg, #fa709a 0%, #fee140 100%) !important;
}
.danger-btn > button {
  background: linear-gradient(135deg, #ff6b6b 0%, #ffa500 100%) !important;
}
.event-card {
  background: #f8f9fa;
  color: #333;
  padding: 1.5rem;
  border-radius: 8px;
  margin: 1rem 0;
  border: 1px solid #dee2e6;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}
.event-title {
  font-size: 1.5rem;
  font-weight: bold;
  margin-bottom: 0.5rem;
  color: #495057;
}
.expense-card {
  background: white;
  padding: 1rem;
  border-radius: 8px;
  margin: 0.5rem 0;
  border: 1px solid #e0e0e0;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}
.expense-card h4 {
  margin: 0 0 0.5rem 0;
  color: #333;
}
.expense-card p {
  margin: 0.25rem 0;
  color: #666;
}
.achievement-badge {
  background: #f8f9fa;
  padding: 0.5rem 1rem;
  border-radius: 20px;
  margin: 0.25rem;
  display: inline-block;
  font-weight: bold;
  border: 1px solid #dee2e6;
  color: #495057;
}
.stProgress > div > div > div {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: 10px;
}
.stAlert {
  border-radius: 8px;
  border: none;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

/* ---------- Leaderboard styles ---------- */
.leaderboard {
  --lb-bg: #ffffff;
  --lb-border: #e5e7eb; /* gray-200 */
  --lb-accent: linear-gradient(135deg, #22c55e, #059669);
  --lb-you-bg: #ecfdf5; /* emerald-50 */
  --lb-text: #111827; /* gray-900 */

  border: 1px solid var(--lb-border);
  border-radius: 16px;
  background: var(--lb-bg);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
  overflow: hidden;
  color: var(--lb-text);
}

.leaderboard .lb-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 18px;
  background: var(--lb-accent);
  color: #fff;
  font-weight: 800;
  letter-spacing: 0.2px;
}

.lb-row {
  display: grid;
  grid-template-columns: 56px 1fr auto auto;
  gap: 12px;
  align-items: center;
  padding: 12px 18px;
  border-top: 1px solid var(--lb-border);
}

.lb-row:first-of-type {
  border-top: none;
}

.lb-row.is-you {
  background: var(--lb-you-bg);
  position: relative;
}

.lb-rank {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: #f3f4f6; /* gray-100 */
  font-weight: 800;
}

.lb-rank.medal-1 {
  background: #f59e0b;
  color: #fff;
} /* gold */
.lb-rank.medal-2 {
  background: #9ca3af;
  color: #fff;
} /* silver */
.lb-rank.medal-3 {
  background: #b45309;
  color: #fff;
} /* bronze */

.lb-name {
  font-weight: 700;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.lb-level {
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  background: #eef2ff; /* indigo-50 */
  color: #3730a3; /* indigo-800 */
  font-weight: 800;
}

.lb-xp {
  font-variant-numeric: tabular-nums;
  font-weight: 700;
}

.lb-you-pill {
  position: absolute;
  right: 10px;
  top: 10px;
  background: #10b981; /* emerald-500 */
  color: #fff;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 999px;
  font-weight: 800;
}

/* Small screens: tuck columns a bit tighter */
@media (max-width: 640px) {
  .lb-row {
    grid-template-columns: 48px 1fr auto;
  }
  .lb-xp {
    display: none; /* hide XP column on very small screens */
  }
}