@import url("https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&display=swap");
@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap");
@import url("https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600;700&display=swap");
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #00ff88;
  --secondary: #00d4ff;
  --danger: #ff0066;
  --warning: #ffaa00;
  --success: #00ff88;
  --dark: #0a0e27;
  --darker: #050714;
  --light: #ffffff;
  --gray: #8892b0;
  --purple: #9c88ff;
  --gold: #ffd700;
  --silver: #c0c0c0;
  --bronze: #cd7f32;
}

body {
  font-family: "Kanit", "Inter", system-ui, -apple-system, sans-serif;
  background: linear-gradient(135deg, #0a0e27 0%, #050714 100%);
  color: var(--light);
  min-height: 100vh;
  overflow-x: hidden;
}

/* Stats and numbers
.rank-number,
.player-points,
.xp,
.rank-widget-number {
    font-family: 'Space Grotesk', 'Inter', sans-serif;
} */

/* Cyber Grid Background */
/* home.css (CRITICAL: Prevents horizontal shift and flicker) */

.nav-user-area {
  display: flex;
  align-items: center;
  gap: 1rem;

  /* FIX: Reserve horizontal space immediately */
  min-width: 180px;
  height: 40px;
}

/* Ensures the hidden elements are aggressively removed from the layout flow */
.loading-hidden {
  visibility: hidden !important;
  opacity: 0 !important;
  position: absolute !important;
  top: -9999px;
}

.cyber-grid {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: linear-gradient(rgba(0, 255, 136, 0.1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 255, 136, 0.1) 1px, transparent 1px);
  background-size: 50px 50px;
  animation: gridMove 20s linear infinite;
  pointer-events: none;
  z-index: 1;
}

@keyframes gridMove {
  0% {
    transform: translate(0, 0);
  }
  100% {
    transform: translate(50px, 50px);
  }
}

/* Floating particles */
.particles {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 2;
}

.particle {
  position: absolute;
  width: 2px;
  height: 2px;
  background: var(--primary);
  border-radius: 50%;
  animation: float 15s linear infinite;
  opacity: 0.6;
}

@keyframes float {
  0% {
    transform: translateY(100vh) rotate(0deg);
    opacity: 0;
  }
  10% {
    opacity: 0.6;
  }
  90% {
    opacity: 0.6;
  }
  100% {
    transform: translateY(-100px) rotate(360deg);
    opacity: 0;
  }
}

/* Navigation */
nav {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(10, 14, 39, 0.95);
  backdrop-filter: blur(10px);
  padding: 1rem 2rem;
  z-index: 1000;
  border-bottom: 2px solid var(--primary);
  box-shadow: 0 4px 30px rgba(0, 255, 136, 0.3);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: bold;
  background: linear-gradient(45deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  color: var(--light);
  text-decoration: none;
  position: relative;
  transition: all 0.3s;
  padding: 0.5rem 1rem;
  border-radius: 5px;
  font-weight: 500;
}

.nav-link:hover:not(.sign-in-btn) {
  color: var(--primary);
  background: rgba(0, 255, 136, 0.1);
  transform: translateY(-2px);
}

.sign-in-btn {
  background: linear-gradient(
    45deg,
    var(--primary),
    var(--secondary)
  ) !important;
  color: var(--dark) !important;
  font-weight: bold !important;
  border-radius: 25px !important;
  padding: 0.8rem 1.5rem !important;
  text-transform: uppercase !important;
  letter-spacing: 1px !important;
  border: 2px solid var(--primary) !important;
  transition: all 0.3s ease !important;
  margin-left: 1rem !important;
}

.sign-in-btn:hover {
  transform: translateY(-2px) !important;
  box-shadow: 0 10px 25px rgba(0, 255, 136, 0.4) !important;
  background: linear-gradient(
    45deg,
    var(--secondary),
    var(--primary)
  ) !important;
}
.nav-user-area {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* avatar ปุ่มด้านขวา */
.profile-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.2rem 0.8rem;
  border-radius: 999px;
  background: rgba(0, 255, 136, 0.15);
  border: 1px solid rgba(0, 255, 136, 0.6);
  text-decoration: none;
  color: var(--light);
  font-weight: 500;
  transition: all 0.25s ease;
}

.profile-pill:hover {
  background: rgba(0, 255, 136, 0.25);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(0, 255, 136, 0.4);
}

.nav-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--primary);
  box-shadow: 0 0 10px rgba(0, 255, 136, 0.6);
}

#navUsername {
  max-width: 120px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-size: 0.9rem;
  color: var(--light);
  opacity: 0.9;
}

/* Main Content */
.main-content {
  margin-top: 80px;
  padding: 2rem;
  max-width: 1400px;
  margin-left: auto;
  margin-right: auto;
  position: relative;
  z-index: 10;
}

/* Leaderboard Header */
.leaderboard-header {
  text-align: center;
  padding: 2rem 0 3rem;
}

.page-title {
  font-size: 3rem;
  margin-bottom: 0.5rem;
  background: linear-gradient(45deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
}

.trophy-icon {
  font-size: 3.5rem;
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%,
  20%,
  50%,
  80%,
  100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-10px);
  }
  60% {
    transform: translateY(-5px);
  }
}

.subtitle {
  font-size: 1.2rem;
  color: var(--gray);
}

/* Podium Section */
.podium-container {
  display: flex;
  justify-content: center;
  align-items: flex-end;
  gap: 2rem;
  margin: 3rem 0 4rem;
  flex-wrap: wrap;
}

.podium-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
}

.podium-avatar {
  position: relative;
  margin-bottom: 1rem;
}

.avatar-circle {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(45deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--dark);
  position: relative;
  z-index: 2;
}

.first-place .avatar-circle {
  width: 100px;
  height: 100px;
  font-size: 2rem;
}

.crown {
  position: absolute;
  top: -20px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 2rem;
  z-index: 3;
}

.first-place .crown {
  font-size: 2.5rem;
  top: -25px;
}

.podium-info {
  text-align: center;
  margin-bottom: 1rem;
}

.podium-info h3 {
  font-size: 1.2rem;
  margin-bottom: 0.3rem;
  color: var(--light);
}

.first-place .podium-info h3 {
  font-size: 1.5rem;
  color: var(--gold);
}

.level {
  color: var(--gray);
  font-size: 0.9rem;
  margin-bottom: 0.2rem;
}

.xp {
  color: var(--primary);
  font-weight: bold;
  font-size: 1.1rem;
}

.podium-base {
  width: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px 10px 0 0;
  position: relative;
  overflow: hidden;
}

.podium-base::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    45deg,
    transparent,
    rgba(255, 255, 255, 0.1),
    transparent
  );
  animation: shimmer 3s linear infinite;
}

.first {
  height: 100px;
  background: linear-gradient(135deg, var(--gold), #b8860b);
  order: 2;
}

.second {
  height: 80px;
  background: linear-gradient(135deg, var(--silver), #708090);
  order: 1;
}

.third {
  height: 60px;
  background: linear-gradient(135deg, var(--bronze), #8b4513);
  order: 3;
}

.rank-number {
  font-size: 2rem;
  font-weight: bold;
  color: var(--light);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

@keyframes shimmer {
  0% {
    transform: translateX(-100%) rotate(45deg);
  }
  100% {
    transform: translateX(100%) rotate(45deg);
  }
}

/* Leaderboard Container */
.leaderboard-container {
  background: rgba(10, 14, 39, 0.8);
  border: 1px solid var(--primary);
  border-radius: 20px;
  padding: 2rem;
  margin: 2rem 0;
  backdrop-filter: blur(10px);
  position: relative;
}

/* Current Rank Widget */
.current-rank-widget {
  position: absolute;
  transform: scale(0.75);
  transform-origin: top right;
  top: 1rem;
  right: 1rem;
  background: linear-gradient(
    135deg,
    rgba(255, 170, 0, 0.2),
    rgba(0, 255, 136, 0.15)
  );
  border: 2px solid var(--warning);
  border-radius: 12px;
  padding: 1rem;
  text-align: center;
  min-width: 120px;
  backdrop-filter: blur(10px);
  box-shadow: 0 8px 25px rgba(255, 170, 0, 0.4);
  animation: rankPulse 3s ease-in-out infinite alternate;
}

@keyframes rankPulse {
  from {
    box-shadow: 0 8px 25px rgba(255, 170, 0, 0.4);
    border-color: var(--warning);
  }
  to {
    box-shadow: 0 12px 35px rgba(202, 197, 187, 0.6);
    border-color: #ffcc00;
  }
}

.rank-widget-header {
  font-size: 0.75rem;
  color: var(--gray);
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.rank-widget-number {
  font-size: 2rem;
  font-weight: bold;
  color: var(--warning);
  margin-bottom: 0.3rem;
  text-shadow: 0 0 15px rgba(255, 170, 0, 0.8), 0 0 25px rgba(255, 170, 0, 0.6);
}

.rank-widget-total {
  font-size: 0.7rem;
  color: var(--secondary);
  opacity: 0.9;
}

/* Highlight items with same XP as user */
.leaderboard-item.near-user {
  background: linear-gradient(
    135deg,
    rgba(255, 170, 0, 0.1),
    rgba(0, 255, 136, 0.05)
  );
  border: 1px solid rgba(255, 170, 0, 0.4);
  box-shadow: 0 4px 15px rgba(255, 170, 0, 0.2);
}

.near-user .rank-number {
  color: var(--warning);
  text-shadow: 0 0 8px rgba(255, 170, 0, 0.5);
}

.leaderboard-controls {
  display: flex;
  justify-content: center;
  margin-bottom: 2rem;
}

.filter-buttons {
  display: flex;
  gap: 0.5rem;
  background: rgba(0, 255, 136, 0.1);
  padding: 0.3rem;
  border-radius: 25px;
  border: 1px solid rgba(0, 255, 136, 0.3);
}

.filter-btn {
  padding: 0.7rem 1.5rem;
  background: transparent;
  color: var(--gray);
  border: none;
  border-radius: 20px;
  cursor: pointer;
  transition: all 0.3s;
  font-weight: 500;
}

.filter-btn.active,
.filter-btn:hover {
  background: var(--primary);
  color: var(--dark);
}

/* Leaderboard List */
.leaderboard-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.leaderboard-item {
  /* Removed display: flex; as it conflicts with the new grid layout below */
  align-items: center;
  padding: 1rem;
  background: rgba(0, 255, 136, 0.05);
  border: 1px solid rgba(0, 255, 136, 0.2);
  border-radius: 12px;
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
}

/* REMOVED HOVER EFFECT AS REQUESTED */
/*
.leaderboard-item:hover {
    background: rgba(0, 255, 136, 0.1);
    border-color: var(--primary);
    transform: translateX(5px);
}
*/

.leaderboard-item.top-3 {
  border: 2px solid;
  background: rgba(255, 215, 0, 0.1);
}

.leaderboard-item.rank-1 {
  border-color: var(--gold);
  box-shadow: 0 0 20px rgba(255, 215, 0, 0.3);
}

.leaderboard-item.rank-2 {
  border-color: var(--silver);
  box-shadow: 0 0 20px rgba(192, 192, 192, 0.3);
}

.leaderboard-item.rank-3 {
  border-color: var(--bronze);
  box-shadow: 0 0 20px rgba(205, 127, 50, 0.3);
}

.rank-number {
  font-size: 1.5rem;
  font-weight: bold;
  width: 60px; /* Keep this for podium, but ignore for the list now */
  text-align: center;
  color: white;
}

.rank-number.gold {
  color: var(--gold);
}
.rank-number.silver {
  color: var(--silver);
}
.rank-number.bronze {
  color: var(--bronze);
}

.player-info {
  display: flex;
  align-items: center;
  flex: 1;
  margin-left: 1rem;
}

.player-avatar {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: linear-gradient(45deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  color: var(--dark);
  margin-right: 1rem;
}

.player-details h3 {
  font-size: 1.1rem;
  margin-bottom: 0.2rem;
  color: var(--light);
}

.player-level {
  color: var(--primary); /* เปลี่ยนจาก var(--gray) */
  font-size: 0.9rem;
  font-weight: 500; /* เพิ่ม weight */
}

.level {
  color: var(--primary); /* เปลี่ยนจาก var(--gray) */
  font-size: 0.9rem;
  margin-bottom: 0.2rem;
  font-weight: 500; /* เพิ่ม weight */
}

.player-points {
  font-size: 1.2rem;
  font-weight: bold;
  color: var(--secondary);
  margin-right: 1rem;
}

/* User Rank Highlight - Simple Version */
.user-rank-highlight {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 2px solid var(--primary);
  position: relative;
}

.rank-indicator {
  text-align: center;
  margin-bottom: 1.5rem;
}

.your-rank-label {
  background: var(--primary);
  color: var(--dark);
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-weight: bold;
  font-size: 0.9rem;
}

.user-rank-simple {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 2rem;
  background: linear-gradient(
    135deg,
    rgba(0, 255, 136, 0.15),
    rgba(0, 212, 255, 0.1)
  );
  border: 2px solid var(--primary);
  border-radius: 20px;
  position: relative;
  overflow: hidden;
  min-height: 120px;
}

.user-rank-simple::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    45deg,
    transparent,
    rgba(0, 255, 136, 0.2),
    transparent
  );
  animation: shimmer 2s linear infinite;
}

.rank-number-large {
  font-size: 4rem;
  font-weight: bold;
  color: var(--warning);
  text-shadow: 0 0 20px rgba(255, 170, 0, 0.8), 0 0 40px rgba(255, 170, 0, 0.6),
    0 0 60px rgba(255, 170, 0, 0.4);
  position: relative;
  z-index: 1;
  animation: rankGlow 3s ease-in-out infinite alternate;
}
.points {
  color: var(--primary);
  font-weight: bold;
  font-size: 1.1rem;
}

@keyframes rankGlow {
  from {
    text-shadow: 0 0 20px rgba(255, 170, 0, 0.8),
      0 0 40px rgba(255, 170, 0, 0.6), 0 0 60px rgba(255, 170, 0, 0.4);
  }
  to {
    text-shadow: 0 0 30px rgba(255, 170, 0, 1), 0 0 60px rgba(255, 170, 0, 0.8),
      0 0 80px rgba(255, 170, 0, 0.6);
  }
}

/* ======================================================= */
/* !!! CORE FIX FOR LEADERBOARD COLUMN ALIGNMENT (GRID) !!!*/
/* ======================================================= */

/* 1. Base style for the header and content rows */
.leaderboard-header-row,
.leaderboard-list .leaderboard-row {
  display: grid;
  /* Define 4 columns: Rank (fixed), User (flexible), Solved (fixed), Points (fixed) */
  grid-template-columns: 60px 1fr 100px 120px;
  gap: 10px;
  align-items: center;
  /* Reset padding from the .leaderboard-item style to match the new grid structure */
  padding: 0 1rem;
}

/* 2. Styling for the static HTML header row */
.leaderboard-header-row {
  font-weight: bold;
  color: var(--gray);
  text-transform: uppercase;
  font-size: 0.9rem;
  padding: 1rem; /* Padding to match the rows */
  margin-bottom: 0.5rem;
  border-bottom: 2px solid rgba(0, 255, 136, 0.2);
}

/* 3. Align text within the static HTML header columns */
.leaderboard-header-row .col-rank {
  text-align: center;
}
.leaderboard-header-row .col-solved,
.leaderboard-header-row .col-points {
  text-align: right;
}

/* 4. Overwrite/adjust styles for the JS-generated items */
.leaderboard-list .leaderboard-row {
  /* These rows are now generated with a class 'leaderboard-row' */
  padding: 1rem; /* Apply padding back to the row for visual space */

  /* Inherited styles from .leaderboard-item (border, background) */
  background: rgba(0, 255, 136, 0.05);
  border: 1px solid rgba(0, 255, 136, 0.2);
  border-radius: 12px;
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
}

/* 5. Align content within the JS-generated columns */
.leaderboard-list .leaderboard-row .col.rank {
  text-align: center;
  font-size: 1.5rem;
  font-weight: bold;
  color: gray;
}

.leaderboard-list .leaderboard-row .col.solved,
.leaderboard-list .leaderboard-row .col.points {
  text-align: right;
  font-size: 1.2rem; /* Match the .player-points size */
  font-weight: bold;
}

/* 6. Fix the avatar/user info alignment within the 'User' column (col.user) */
.leaderboard-list .leaderboard-row .col.user .user-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* 7. NEW: TOP 3 RANK COLORING */
.leaderboard-list .rank-gold-row .col.rank {
  color: var(--gold) !important;
}
.leaderboard-list .rank-silver-row .col.rank {
  color: var(--silver) !important;
}
.leaderboard-list .rank-bronze-row .col.rank {
  color: var(--bronze) !important;
}

/* ======================================================= */

/* Responsive Design */
@media (max-width: 768px) {
  .podium-container {
    flex-direction: column;
    align-items: center;
  }

  .podium-item {
    width: 100%;
    max-width: 300px;
    order: unset !important;
  }

  .page-title {
    font-size: 2rem;
    flex-direction: column;
    gap: 0.5rem;
  }

  .nav-links {
    flex-direction: column;
    gap: 0.5rem;
  }

  .nav-container {
    flex-direction: column;
    gap: 1rem;
  }

  .sign-in-btn {
    margin-left: 0 !important;
  }

  .filter-buttons {
    flex-direction: column;
    width: 100%;
  }

  .user-rank-simple {
    flex-direction: column;
    text-align: center;
    gap: 1rem;
    padding: 1.5rem;
  }

  .rank-number-large {
    font-size: 3rem;
  }

  /* Adjust Grid for smaller screens */
  .leaderboard-header-row,
  .leaderboard-list .leaderboard-row {
    /* Reduce fixed widths on mobile */
    grid-template-columns: 40px 1fr 80px 100px;
  }
}

/* ------------------------------------------------------------------ */
/* --- HAMBURGER MENU STYLES (REQUIRED FOR TOGGLE) --- */
/* ------------------------------------------------------------------ */

/* ซ่อนปุ่ม Hamburger บนหน้าจอเดสก์ท็อป (ขนาดใหญ่) */
.hamburger-menu {
  display: none;
}

/* ลบสไตล์การโฟกัสเริ่มต้นที่ไม่ต้องการบนปุ่ม */
#hamburgerBtn:focus,
#hamburgerBtn:active {
  outline: none !important;
  box-shadow: none !important;
  background: transparent !important;
}

/* ------------------------------------------------------------------ */
/* --- 1. สไตล์สำหรับ Profile Pill (แก้ไขปัญหาความกว้างชื่อผู้ใช้) --- */
/* ------------------------------------------------------------------ */

/* สำหรับเม็ดโปรไฟล์ทั้งหมด (รวม avatar และ username) */
.profile-pill {
  display: flex;
  align-items: center;
  max-width: 150px; /* จำกัดความกว้างรวมของเม็ดโปรไฟล์ */
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis; /* แสดง ... เมื่อชื่อยาวเกิน */
}

/* สำหรับ Avatar */
.nav-avatar {
  flex-shrink: 0; /* Avatar ไม่ย่อ */
  width: 30px;
  height: 30px;
  border-radius: 50%;
}

/* สำหรับชื่อผู้ใช้โดยเฉพาะ */
#navUsername {
  flex-shrink: 1; /* ชื่อผู้ใช้ยอมย่อ */
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  padding-left: 0.5rem; /* ระยะห่างจาก avatar */
}

/* ------------------------------------------------------------------ */
/* --- 2. สไตล์สำหรับ Hamburger Menu (Mobile Toggle) --- */
/* ------------------------------------------------------------------ */

/* ซ่อนปุ่ม Hamburger บนหน้าจอเดสก์ท็อป */
.hamburger-menu {
  display: none;
}

/* ลบสไตล์การโฟกัสเริ่มต้นที่ไม่ต้องการบนปุ่ม */
#hamburgerBtn:focus,
#hamburgerBtn:active {
  outline: none !important;
  box-shadow: none !important;
  background: transparent !important;
}

/* --- MEDIA QUERY สำหรับหน้าจอขนาดเล็ก (Mobile) --- */

/* --- MEDIA QUERY สำหรับหน้าจอขนาดเล็ก (Mobile) --- */

@media (max-width: 768px) {
  /* ------------------------------------------- */
  /* 1. NAVIGATION BAR (HAMBURGER TOGGLE) */
  /* ------------------------------------------- */

  /* Nav Container: ต้องใช้ flex-wrap เพื่อให้เมนูลงมาบรรทัดใหม่ได้ */
  .nav-container {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 0.5rem; /* ลด gap โดยรวม */
  }

  /* แสดงปุ่มแฮมเบอร์เกอร์และจัดตำแหน่ง */
  .hamburger-menu {
    display: block;
    order: 2;
  }

  .logo {
    order: 1;
  }

  #hamburgerBtn {
    /* ... (สไตล์ปุ่มยังคงเดิม) ... */
    background: transparent !important;
    border: none !important;
    appearance: none;
    -webkit-appearance: none;
    outline: none !important;
    box-shadow: none !important;
    font-size: 2.5rem;
    color: var(--primary) !important;
    cursor: pointer;
    padding: 0.2rem 0.5rem 0.2rem 1rem !important;
  }

  /* ซ่อนลิงก์เมนูหลักตามค่าเริ่มต้นบนมือถือ */
  .nav-links {
    display: none; /* ซ่อนตามค่าเริ่มต้น */
    width: 100%; /* สำคัญ: เต็มความกว้างเพื่อให้ลงมาอยู่แถวที่สาม */
    flex-direction: column;
    align-items: center;
    padding-top: 1rem;
    order: 3;
  }

  /* จัดการลิงก์ภายในเมนู */
  .nav-links .nav-link {
    padding: 0.5rem 0;
    width: 100%;
    text-align: center;
  }

  /* ****************************************************** */
  /* *** สไตล์ Nav User Area และ Profile Pill (CRITICAL FIX) *** */
  /* ****************************************************** */
  .nav-user-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    margin-top: 1rem;
  }

  .nav-user-area .sign-in-btn {
    /* CRITICAL FIX 1: Ensure it's a block element to use margin: auto correctly */
    display: block !important;
    /* CRITICAL FIX 2: Ensure text is centered within the button */
    text-align: center !important;
    /* Ensure spacing and width */
    margin: 0.5rem auto !important;
    width: 90%;
    max-width: 300px;
  }

  .nav-user-area .profile-pill {
    /* Set the pill width and center it */
    width: 50%;
    max-width: 250px;
    margin: 0.5rem auto;

    /* Use flex on the pill itself to center content (avatar/username) */
    display: flex;
    justify-content: center;
    padding: 1rem;
  }

  /* 4. KEY: แสดงเมนูเมื่อ nav-container มีคลาส 'menu-active' */
  .nav-container.menu-active .nav-links {
    display: flex;
    padding-bottom: 1rem;
  }

  /* ------------------------------------------- */
  /* 2. LEADERBOARD HEADER & WIDGET */
  /* ------------------------------------------- */

  .main-content {
    padding: 1rem; /* ลด padding โดยรวม */
  }

  .leaderboard-header {
    padding: 1rem 0 2rem;
  }

  .page-title {
    font-size: 2rem;
    flex-direction: column;
    gap: 0.5rem;
  }

  /* แก้ไข Current Rank Widget */
  .current-rank-widget {
    transform: none; /* ลบ scale(0.75) */
    position: relative;
    top: unset;
    right: unset;
    margin-bottom: 1.5rem;
    width: 100%; /* ใช้ความกว้างเต็มจอ */
    text-align: center; /* จัดข้อความให้อยู่ตรงกลาง */
  }

  .rank-widget-number {
    font-size: 1.5rem;
  }

  /* ------------------------------------------- */
  /* 3. PODIUM SECTION - บังคับให้เป็นแนวนอน (Flex-direction: row) */
  /* ------------------------------------------- */
  .podium-container {
    display: flex; /* ต้องมั่นใจว่าเป็น flex */
    flex-direction: row; /* <--- เปลี่ยนเป็น ROW เพื่อให้อยู่แนวนอน */
    justify-content: center; /* จัดให้อยู่ตรงกลางจอ */
    align-items: flex-end; /* จัดให้ฐาน Podium อยู่แนวเดียวกัน */
    gap: 0.5rem; /* ลดช่องว่างระหว่าง Podium Item */
    margin: 1rem 0 2rem;
    flex-wrap: nowrap; /* ป้องกันไม่ให้ขึ้นบรรทัดใหม่ */
  }

  .podium-item {
    /* ลดความกว้างสูงสุดเพื่อให้มีที่ว่างสำหรับ 3 องค์ประกอบ */
    width: 30%; /* ให้แต่ละอันใช้ประมาณ 1 ใน 3 ของพื้นที่ */
    max-width: 100px; /* จำกัดความกว้างสูงสุดของแต่ละไอเทม */
    /* ยกเลิกการสั่งเรียงเพื่อคงลำดับ 2, 1, 3 (ซึ่งควรจัดการใน HTML/JS) */
    order: unset !important;
  }

  /* ปรับขนาด Podium Item ทั้งหมดให้เล็กลง */
  .first-place .avatar-circle {
    width: 60px; /* ลดขนาด Avatar อันดับ 1 */
    height: 60px;
    font-size: 01.2rem;
  }

  .avatar-circle {
    width: 45px; /* ลดขนาด Avatar อันดับ 2 และ 3 */
    height: 45px;
    font-size: 1rem;
  }
  .podium-info h3 {
    font-size: 0.9rem; /* ลดขนาดชื่อผู้ใช้ */
  }

  .level,
  .xp {
    font-size: 0.7rem; /* ลดขนาด Solved/Points */
  }

  .podium-base {
    width: 100%; /* ให้ฐานเต็มความกว้างของ podium-item นั้นๆ */
  }

  .rank-number {
    font-size: 1.5rem; /* ลดขนาดตัวเลขลำดับ */
  }

  .crown {
    font-size: 1.2rem; /* <-- ลดขนาดมงกุฎ/เหรียญบนมือถือ */
    top: -10px; /* ปรับตำแหน่งให้เหมาะสม */
  }

  .first-place .crown {
    font-size: 1.5rem; /* <-- ลดขนาดมงกุฎอันดับ 1 บนมือถือ */
    top: -15px; /* ปรับตำแหน่งให้เหมาะสม */
  }

  /* ------------------------------------------- */
  /* 4. LEADERBOARD LIST (TABLE GRID) */
  /* ------------------------------------------- */

  .leaderboard-header-row,
  .leaderboard-list .leaderboard-row {
    /* ปรับ Grid Columns สำหรับมือถือ: 
           Rank (30px), User (1fr), Solved (60px), Points (80px) */
    grid-template-columns: 30px 1fr 60px 80px;
    gap: 5px;
    padding: 0.5rem;
  }

  /* ปรับขนาดฟอนต์ในตาราง */
  .leaderboard-list .leaderboard-row .col.rank {
    font-size: 1.2rem;
  }
  .leaderboard-list .leaderboard-row .col.points,
  .leaderboard-list .leaderboard-row .col.solved {
    font-size: 1rem;
    font-weight: 500;
  }

  .leaderboard-list .leaderboard-row .col.user .user-meta {
    /* ปรับ gap ใน user meta */
    gap: 0.5rem;
  }
}