/* Design Challenge - Wireframe Styles */

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #f5f5f5;
}

/* Container */
.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.header {
  background-color: #fff;
  border-bottom: 2px solid #ccc;
  padding: 16px 0;
}

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

.logo {
  font-size: 20px;
  font-weight: bold;
  color: #333;
  text-decoration: none;
  padding: 8px 12px;
  border: 2px solid #999;
  background-color: #e0e0e0;
}

.nav {
  display: flex;
  gap: 12px;
}

.nav-link {
  display: inline-block;
  padding: 10px 20px;
  text-decoration: none;
  color: #333;
  border: 2px solid #999;
  background-color: #fff;
  font-size: 14px;
  cursor: pointer;
  transition: background-color 0.2s;
}

.nav-link:hover {
  background-color: #e0e0e0;
}

.nav-link--primary {
  background-color: #666;
  color: #fff;
  border-color: #555;
}

.nav-link--primary:hover {
  background-color: #555;
}

/* Hero Section */
.hero {
  background-color: #fff;
  border: 2px solid #ccc;
  margin: 40px auto;
  padding: 60px 40px;
  text-align: center;
}

.hero__headline {
  font-size: 32px;
  font-weight: bold;
  color: #222;
  margin-bottom: 16px;
  line-height: 1.3;
}

.hero__subheadline {
  font-size: 18px;
  color: #666;
  margin-bottom: 32px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero__ctas {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 14px 32px;
  font-size: 16px;
  text-decoration: none;
  border: 2px solid #999;
  background-color: #fff;
  color: #333;
  cursor: pointer;
  transition: background-color 0.2s;
}

.btn:hover {
  background-color: #e0e0e0;
}

.btn--primary {
  background-color: #666;
  color: #fff;
  border-color: #555;
}

.btn--primary:hover {
  background-color: #555;
}

.btn--secondary {
  background-color: #fff;
  color: #333;
}

/* Features Section */
.features {
  margin: 40px auto 60px;
}

.features__title {
  text-align: center;
  font-size: 24px;
  color: #333;
  margin-bottom: 32px;
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background-color: #fff;
  border: 2px solid #ccc;
  padding: 32px 24px;
  text-align: center;
}

.feature-card__title {
  font-size: 18px;
  font-weight: bold;
  color: #333;
  margin-bottom: 12px;
}

.feature-card__description {
  font-size: 14px;
  color: #666;
  line-height: 1.5;
}

/* Card (for forms) */
.card {
  background-color: #fff;
  border: 2px solid #ccc;
  padding: 40px;
  max-width: 400px;
  margin: 60px auto;
}

.card__title {
  font-size: 24px;
  font-weight: bold;
  color: #333;
  margin-bottom: 8px;
  text-align: center;
}

.card__subtitle {
  font-size: 14px;
  color: #666;
  margin-bottom: 32px;
  text-align: center;
}

/* Forms */
.form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 14px;
  font-weight: 500;
  color: #333;
}

.form-group input {
  padding: 12px;
  font-size: 16px;
  border: 2px solid #ccc;
  background-color: #fafafa;
  color: #333;
}

.form-group input:focus {
  outline: none;
  border-color: #999;
  background-color: #fff;
}

.form-group input::placeholder {
  color: #999;
}

.form__submit {
  margin-top: 8px;
}

.form__submit .btn {
  width: 100%;
}

/* Form Links */
.form-links {
  margin-top: 24px;
  text-align: center;
  font-size: 14px;
  color: #666;
}

.form-links a {
  color: #333;
  text-decoration: underline;
}

.form-links a:hover {
  color: #000;
}

/* Messages */
.message {
  padding: 12px;
  border: 2px solid;
  margin-bottom: 20px;
  font-size: 14px;
  display: none;
}

.message--error {
  border-color: #c00;
  background-color: #fee;
  color: #900;
}

.message--success {
  border-color: #0a0;
  background-color: #efe;
  color: #070;
}

.message.visible {
  display: block;
}

/* Footer */
.footer {
  background-color: #fff;
  border-top: 2px solid #ccc;
  padding: 24px 0;
  text-align: center;
  margin-top: auto;
}

.footer__text {
  font-size: 14px;
  color: #666;
}

/* Page wrapper for sticky footer */
.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.main {
  flex: 1;
}

/* Responsive */
@media (max-width: 768px) {
  .header .container {
    flex-direction: column;
    gap: 16px;
  }

  .hero {
    padding: 40px 24px;
    margin: 24px 16px;
  }

  .hero__headline {
    font-size: 24px;
  }

  .hero__subheadline {
    font-size: 16px;
  }

  .features__grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .features {
    margin: 24px 16px 40px;
  }

  .card {
    margin: 40px 16px;
    padding: 32px 24px;
  }

  .hero__ctas {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    max-width: 280px;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .nav {
    flex-direction: column;
    width: 100%;
  }

  .nav-link {
    text-align: center;
    width: 100%;
  }
}

/* Leaderboard Section */
.leaderboard {
  background-color: #fff;
  border: 2px solid #ccc;
  padding: 40px;
  max-width: 600px;
  margin: 60px auto;
}

.leaderboard__title {
  font-size: 24px;
  font-weight: bold;
  color: #333;
  margin-bottom: 8px;
  text-align: center;
}

.leaderboard__challenge {
  font-size: 16px;
  color: #666;
  margin-bottom: 32px;
  text-align: center;
}

.leaderboard__loading {
  text-align: center;
  padding: 40px;
  color: #666;
  font-size: 14px;
}

.leaderboard__empty {
  text-align: center;
  padding: 40px;
  color: #666;
  font-size: 14px;
  display: none;
}

.leaderboard__table {
  width: 100%;
  border-collapse: collapse;
  display: none;
}

.leaderboard__table thead {
  background-color: #f5f5f5;
  border-bottom: 2px solid #ccc;
}

.leaderboard__table th {
  padding: 12px 16px;
  text-align: left;
  font-size: 12px;
  font-weight: 600;
  color: #666;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.leaderboard__table th.leaderboard__rank {
  width: 60px;
  text-align: center;
}

.leaderboard__table th.leaderboard__time {
  width: 100px;
  text-align: right;
}

.leaderboard__row {
  border-bottom: 1px solid #e0e0e0;
}

.leaderboard__row:last-child {
  border-bottom: none;
}

.leaderboard__row--current {
  background-color: #f0f8ff;
}

.leaderboard__cell {
  padding: 16px;
  font-size: 14px;
  color: #333;
}

.leaderboard__cell--rank {
  text-align: center;
  font-weight: bold;
  color: #666;
}

.leaderboard__cell--name {
  font-weight: 500;
}

.leaderboard__cell--time {
  text-align: right;
  font-family: 'SF Mono', 'Monaco', 'Consolas', monospace;
  color: #666;
}

/* Rank badges for top 3 */
.leaderboard__row:nth-child(1) .leaderboard__cell--rank {
  color: #d4af37;
}

.leaderboard__row:nth-child(2) .leaderboard__cell--rank {
  color: #a0a0a0;
}

.leaderboard__row:nth-child(3) .leaderboard__cell--rank {
  color: #cd7f32;
}

/* Leaderboard responsive */
@media (max-width: 768px) {
  .leaderboard {
    margin: 40px 16px;
    padding: 24px;
  }

  .leaderboard__table th,
  .leaderboard__cell {
    padding: 12px 8px;
  }
}