:root {
  /* Light Theme Palette */
  --navy: #F8FAFC; /* Main background (off-white/light gray) */
  --light-navy: #FFFFFF; /* Card background (white) */
  --lightest-navy: #E2E8F0; /* Borders, subtle elements */
  --green: #10B981; /* Action Green */
  --slate: #334155; /* Primary Text */
  --light-slate: #64748B; /* Secondary Text */
  --white: #0F172A; /* Headers (Dark Slate/Black) */
  
  --diamond: #0284c7; /* Blue for diamond text */
  --diamond-bg: #e0f2fe; /* Light blue background for diamond row */
  --platinum: #475569; /* Gray for platinum text */
  --platinum-bg: #f1f5f9; /* Light gray background for platinum row */
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--navy);
  color: var(--slate);
  line-height: 1.6;
}

h1, h2, h3, h4 {
  color: var(--white);
  font-weight: 600;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Navbar */
.navbar {
  padding: 20px 0;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--lightest-navy);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  color: var(--green);
  font-size: 1.5rem;
  font-weight: 700;
}

.badge {
  font-size: 0.7rem;
  background: var(--lightest-navy);
  color: var(--slate);
  padding: 3px 8px;
  border-radius: 12px;
  vertical-align: middle;
  margin-left: 10px;
  letter-spacing: 1px;
}

/* Base Buttons */
.btn {
  padding: 10px 20px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 500;
  transition: all 0.3s ease;
}

.btn-primary {
  background: var(--green);
  color: #ffffff;
}

.btn-primary:hover {
  background: #059669;
}

.btn-outline {
  border: 1px solid var(--green);
  background: transparent;
  color: var(--green);
}

.btn-outline:hover {
  background: rgba(16, 185, 129, 0.1);
}

/* Panels */
.panel {
  background: var(--light-navy);
  border-radius: 12px;
  padding: 30px;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  border: 1px solid var(--lightest-navy);
}

.panel h2 {
  margin-bottom: 10px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--lightest-navy);
}

/* Hero Section */
.hero-card {
  background: var(--light-navy);
  border-radius: 12px;
  margin-top: 40px;
  display: flex;
  overflow: hidden;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
  border: 1px solid var(--lightest-navy);
}

.hero-content {
  padding: 40px;
  flex: 1;
}

.hero-content h1 {
  font-size: 2.5rem;
  margin-bottom: 10px;
  color: var(--green);
}

.hero-content p {
  color: var(--light-slate);
  font-size: 1.1rem;
  margin-bottom: 30px;
}

.hero-image {
  flex: 1;
  background: var(--navy);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 20px;
}

.hero-image img {
  max-width: 100%;
  height: 100%;
  object-fit: contain;
  transition: transform 0.3s;
}

/* Progress Bar */
.progress-container {
  background: var(--navy);
  padding: 20px;
  border-radius: 8px;
  border: 1px solid var(--lightest-navy);
}

.progress-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 10px;
  font-weight: 600;
  color: var(--white);
}

.progress-bar {
  height: 10px;
  background: var(--lightest-navy);
  border-radius: 5px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--green);
  transition: width 1s ease-in-out;
}

/* Form Styles */
.form-group {
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
}

.form-group label {
  font-size: 0.85rem;
  color: var(--slate);
  margin-bottom: 5px;
  font-weight: 500;
}

.form-group input {
  background: #FFFFFF;
  border: 1px solid var(--lightest-navy);
  color: var(--slate);
  padding: 12px;
  border-radius: 4px;
  outline: none;
  font-family: inherit;
  transition: border-color 0.2s;
}

.form-group input:focus {
  border-color: var(--green);
}

.error-msg {
  color: #ef4444;
  margin-top: 15px;
  font-size: 0.85rem;
  text-align: center;
}

/* Dashboard Grid */
.dashboard-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
  padding-bottom: 60px;
}

/* Stats */
.user-stats {
  display: flex;
  gap: 20px;
  margin-bottom: 30px;
}

.stat-box {
  background: var(--navy);
  padding: 15px;
  border-radius: 8px;
  flex: 1;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--lightest-navy);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--light-slate);
  text-transform: uppercase;
}

.stat-value {
  font-size: 1.5rem;
  color: var(--green);
  font-weight: 700;
}

/* Tasks */
.task-steps .step {
  display: flex;
  gap: 15px;
  margin-bottom: 25px;
}

.step-num {
  background: var(--green);
  color: #fff;
  width: 35px;
  height: 35px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  flex-shrink: 0;
}

.step-desc h4 {
  margin-bottom: 5px;
}

.drag-drop-zone {
  border: 2px dashed var(--light-slate);
  background: var(--navy);
  border-radius: 8px;
  padding: 30px;
  text-align: center;
  color: var(--light-slate);
  cursor: pointer;
  transition: all 0.2s;
}

.drag-drop-zone:hover {
  border-color: var(--green);
  color: var(--green);
  background: rgba(16, 185, 129, 0.05);
}

.status-feed {
  margin-top: 15px;
  padding: 10px;
  border-radius: 4px;
  text-align: center;
  font-size: 0.9rem;
  font-weight: 600;
  border: 1px solid transparent;
}

.status-feed.pending {
  background: #fef3c7;
  color: #d97706;
  border-color: #fde68a;
}

.status-feed.verified {
  background: #d1fae5;
  color: #059669;
  border-color: #a7f3d0;
}

/* Leaderboard */
.leaderboard-table-container {
  max-height: 500px;
  overflow-y: auto;
  border: 1px solid var(--lightest-navy);
  border-radius: 8px;
}

.leaderboard-table {
  width: 100%;
  border-collapse: collapse;
}

.leaderboard-table th, .leaderboard-table td {
  padding: 15px;
  text-align: left;
  border-bottom: 1px solid var(--lightest-navy);
}

.leaderboard-table th {
  color: var(--light-slate);
  font-size: 0.85rem;
  text-transform: uppercase;
  background: var(--navy);
  position: sticky;
  top: 0;
  z-index: 10;
}

/* Leaderboard Tiers for Light Mode */
.tier-diamond td {
  background-color: var(--diamond-bg);
  color: var(--diamond);
  font-weight: 600;
}

.tier-platinum td {
  background-color: var(--platinum-bg);
  color: var(--platinum);
  font-weight: 500;
}

/* Admin Auth Box */
.admin-auth-box {
  background: var(--light-navy);
  padding: 40px;
  border-radius: 8px;
  max-width: 400px;
  margin: 100px auto;
  text-align: center;
  box-shadow: 0 4px 6px -1px rgba(0,0,0,0.05);
  border: 1px solid var(--lightest-navy);
}

/* Media Queries */
@media (max-width: 768px) {
  .dashboard-grid, .hero-card {
    grid-template-columns: 1fr;
    flex-direction: column;
  }
}