/**
 * VPR 7 Class - Main Page Styles
 * Стили для главной страницы и страницы экзамена
 */

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

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Container */
.container {
  max-width: 900px;
  margin: 0 auto;
  width: 100%;
}

/* Typography */
h1 {
  text-align: center;
  color: white;
  margin-bottom: 10px;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
  font-size: 2.2rem;
}

.subtitle {
  text-align: center;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 40px;
  font-size: 1.1rem;
}

/* Navigation */
.back-link {
  display: inline-block;
  background: rgba(255, 255, 255, 0.2);
  color: white;
  text-decoration: none;
  padding: 10px 20px;
  border-radius: 25px;
  margin-bottom: 20px;
  transition: background 0.3s;
}

.back-link:hover {
  background: rgba(255, 255, 255, 0.3);
}

/* Tasks Grid */
.tasks-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 25px;
}

/* Task Card */
.task-card {
  background: rgba(255, 255, 255, 0.95);
  border-radius: 20px;
  text-align: center;
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
  transition:
    transform 0.3s,
    box-shadow 0.3s;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

a.task-card {
  padding: 30px;
}

.task-card > a.task-card-link {
  padding: 30px 30px 15px 30px;
}

.task-card > a:not(.task-card-link) {
  padding: 30px;
}

.task-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3);
}

.task-card-link {
  text-decoration: none;
  color: inherit;
  display: block;
}

.theory-link {
  display: block;
  margin-top: auto;
  padding: 15px 20px;
  background: linear-gradient(145deg, #4facfe 0%, #00f2fe 100%);
  color: white;
  text-decoration: none;
  border-radius: 0 0 20px 20px;
  font-size: 1.4rem;
  font-weight: 600;
  transition: filter 0.2s;
}

.theory-link:hover {
  filter: brightness(1.1);
}

/* Task Number */
.task-number {
  width: 70px;
  height: 70px;
  background: linear-gradient(145deg, #667eea 0%, #764ba2 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 1.8rem;
  font-weight: bold;
  color: white;
  box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
}

.task-card:nth-child(2) .task-number {
  background: linear-gradient(145deg, #e94560 0%, #ff6b6b 100%);
  box-shadow: 0 8px 20px rgba(233, 69, 96, 0.4);
}

.task-card:nth-child(3) .task-number {
  background: linear-gradient(145deg, #11998e 0%, #38ef7d 100%);
  box-shadow: 0 8px 20px rgba(17, 153, 142, 0.4);
}

.task-card:nth-child(4) .task-number {
  background: linear-gradient(145deg, #f093fb 0%, #f5576c 100%);
  box-shadow: 0 8px 20px rgba(240, 147, 251, 0.4);
}

.task-card:nth-child(5) .task-number {
  background: linear-gradient(145deg, #ff9a56 0%, #ff6b35 100%);
  box-shadow: 0 8px 20px rgba(255, 154, 86, 0.4);
}

.task-card:nth-child(6) .task-number {
  background: linear-gradient(145deg, #2c3e50 0%, #4ca1af 100%);
  box-shadow: 0 8px 20px rgba(76, 161, 175, 0.4);
}

.task-card:nth-child(7) .task-number {
  background: linear-gradient(145deg, #1e3c72 0%, #2a5298 100%);
  box-shadow: 0 8px 20px rgba(30, 60, 114, 0.4);
}

.task-card:nth-child(8) .task-number {
  background: linear-gradient(145deg, #134e5e 0%, #71b280 100%);
  box-shadow: 0 8px 20px rgba(19, 78, 94, 0.4);
}

.task-card:nth-child(9) .task-number {
  background: linear-gradient(145deg, #0f2027 0%, #2c5364 100%);
  box-shadow: 0 8px 20px rgba(15, 32, 39, 0.4);
}

.task-card:nth-child(10) .task-number {
  background: linear-gradient(145deg, #1a1a2e 0%, #0f3460 100%);
  box-shadow: 0 8px 20px rgba(26, 26, 46, 0.4);
}

.task-card:nth-child(11) .task-number {
  background: linear-gradient(145deg, #e53935 0%, #ff6f00 100%);
  box-shadow: 0 8px 20px rgba(229, 57, 53, 0.4);
}

.task-card:nth-child(12) .task-number {
  background: linear-gradient(145deg, #0f4c75 0%, #3282b8 100%);
  box-shadow: 0 8px 20px rgba(15, 76, 117, 0.4);
}

/* Task Content */
.task-title {
  font-size: 1.2rem;
  font-weight: bold;
  color: #333;
  margin-bottom: 10px;
}

.task-description {
  font-size: 0.95rem;
  color: #666;
  line-height: 1.5;
}

.task-icon {
  font-size: 2.5rem;
  margin-bottom: 15px;
}

/* Footer */
.footer {
  text-align: center;
  margin-top: 40px;
  padding: 20px;
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.9rem;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.footer-instruction {
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 10px;
}

.footer-copyright {
  color: rgba(255, 255, 255, 0.8);
}

.footer-github {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
  padding: 8px 16px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.1);
  transition: background 0.3s;
}

.footer-github:hover {
  background: rgba(255, 255, 255, 0.2);
}

.footer-github svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

/* Responsive */
@media (max-width: 600px) {
  h1 {
    font-size: 1.6rem;
  }

  .subtitle {
    font-size: 1rem;
    margin-bottom: 30px;
  }

  .task-card {
    padding: 25px 20px;
  }

  .task-number {
    width: 60px;
    height: 60px;
    font-size: 1.5rem;
  }

  .task-title {
    font-size: 1.1rem;
  }

  .task-description {
    font-size: 0.9rem;
  }
}