/**
 * VPR 8 Class - Common Styles
 * Общие стили для всех страниц проекта ВПР 8 класс
 */

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

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
  min-height: 100vh;
  padding: 20px;
}

/* ============================================
   Container & Layout
   ============================================ */
.container {
  max-width: 900px;
  margin: 0 auto;
}

/* ============================================
   Typography
   ============================================ */
h1 {
  text-align: center;
  color: white;
  margin-bottom: 20px;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
  font-size: 1.6rem;
}

/* ============================================
   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);
}

/* ============================================
   Instructions
   ============================================ */
.instructions {
  background: rgba(255, 255, 255, 0.95);
  padding: 15px 20px;
  border-radius: 10px;
  margin-bottom: 20px;
  text-align: center;
  font-size: 0.95rem;
  color: #333;
}

/* ============================================
   Task Card
   ============================================ */
.task-card {
  background: rgba(255, 255, 255, 0.95);
  border-radius: 15px;
  margin-bottom: 20px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

/* Отступ только для карточек заданий на страницах отдельных заданий */
.container > .task-card {
  padding: 25px;
}

.task-text {
  font-size: 1.1rem;
  line-height: 1.8;
  color: #333;
  margin-bottom: 25px;
}

.task-text .highlight {
  background: linear-gradient(145deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 2px 8px;
  border-radius: 5px;
  font-weight: bold;
}

/* Answer input field */
.answer-area {
  margin-top: 20px;
}

.answer-area label {
  display: block;
  margin-bottom: 10px;
  font-weight: 500;
  color: #333;
}

.answer-area input {
  width: 100%;
  padding: 12px 15px;
  font-size: 1.1rem;
  border: 2px solid #dee2e6;
  border-radius: 8px;
  transition:
    border-color 0.2s,
    box-shadow 0.2s;
}

.answer-area input:focus {
  outline: none;
  border-color: #667eea;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

/* ============================================
   Buttons
   ============================================ */
.buttons {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 20px;
}

.btn {
  border: none;
  padding: 12px 25px;
  border-radius: 25px;
  font-size: 1rem;
  cursor: pointer;
  transition:
    transform 0.2s,
    box-shadow 0.2s;
  font-weight: 500;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-check {
  background: linear-gradient(145deg, #11998e 0%, #38ef7d 100%);
  color: white;
  box-shadow: 0 4px 15px rgba(17, 153, 142, 0.4);
}

.btn-clear {
  background: linear-gradient(145deg, #ff6b6b 0%, #ee5a24 100%);
  color: white;
  box-shadow: 0 4px 15px rgba(255, 107, 107, 0.4);
}

.btn-next {
  background: linear-gradient(145deg, #667eea 0%, #764ba2 100%);
  color: white;
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-reset {
  background: linear-gradient(145deg, #f093fb 0%, #f5576c 100%);
  color: white;
  box-shadow: 0 4px 15px rgba(240, 147, 251, 0.4);
}

.btn-hint {
  background: linear-gradient(145deg, #ffc107 0%, #ff9800 100%);
  color: white;
  box-shadow: 0 4px 15px rgba(255, 193, 7, 0.4);
}

.btn-theory {
  background: linear-gradient(145deg, #4facfe 0%, #00f2fe 100%);
  color: white;
  box-shadow: 0 4px 15px rgba(79, 172, 254, 0.4);
  text-decoration: none;
  display: inline-block;
}

/* ============================================
   Feedback Messages
   ============================================ */
.feedback {
  margin-top: 20px;
  padding: 15px;
  border-radius: 10px;
  text-align: center;
  font-weight: bold;
  display: none;
}

.feedback.correct {
  display: block;
  background: linear-gradient(145deg, #11998e 0%, #38ef7d 100%);
  color: white;
}

.feedback.incorrect {
  display: block;
  background: linear-gradient(145deg, #eb3349 0%, #f45c43 100%);
  color: white;
}

.correct-answer {
  margin-top: 10px;
  font-size: 0.9rem;
  color: #fff;
}

/* ============================================
   Hint Box
   ============================================ */
.hint-box {
  background: #fff3cd;
  border-left: 4px solid #ffc107;
  padding: 12px 15px;
  margin-top: 15px;
  border-radius: 0 8px 8px 0;
  font-size: 0.9rem;
  display: none;
}

.hint-box strong {
  color: #856404;
}

/* ============================================
   Score Board
   ============================================ */
.score-board {
  background: rgba(255, 255, 255, 0.95);
  border-radius: 15px;
  padding: 20px;
  text-align: center;
  margin-top: 20px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.score {
  font-size: 1.3rem;
  font-weight: bold;
  color: #333;
}

.score span {
  color: #11998e;
}

/* ============================================
   Stats
   ============================================ */
.stats {
  display: flex;
  justify-content: center;
  gap: 30px;
  margin-top: 20px;
  flex-wrap: wrap;
}

.stat-item {
  text-align: center;
  padding: 10px 20px;
  background: rgba(255, 255, 255, 0.5);
  border-radius: 10px;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: bold;
  color: #2c3e50;
}

.stat-label {
  font-size: 0.85rem;
  color: #666;
}

/* ============================================
   Task Counter
   ============================================ */
.task-counter {
  text-align: center;
  color: #e94560;
  font-size: 1.1rem;
  margin-bottom: 15px;
  font-weight: bold;
}

/* ============================================
   Results Detail
   ============================================ */
.results-detail {
  margin-top: 15px;
  padding: 15px;
  background: #f8f9fa;
  border-radius: 10px;
  display: none;
}

.results-detail h4 {
  color: #333;
  margin-bottom: 10px;
  text-align: center;
}

.result-item {
  display: flex;
  justify-content: space-between;
  padding: 5px 10px;
  margin: 3px 0;
  border-radius: 5px;
  font-size: 0.9rem;
}

.result-item.correct {
  background: rgba(17, 153, 142, 0.2);
  color: #11998e;
}

.result-item.incorrect {
  background: rgba(235, 51, 73, 0.2);
  color: #eb3349;
}

/* ============================================
   Animations
   ============================================ */
@keyframes shake {
  0%,
  100% {
    transform: translateX(0);
  }
  25% {
    transform: translateX(-10px);
  }
  75% {
    transform: translateX(10px);
  }
}

/* ============================================
   Responsive Styles
   ============================================ */
@media (max-width: 600px) {
  h1 {
    font-size: 1.3rem;
  }

  .task-text {
    font-size: 1rem;
  }

  .btn {
    padding: 10px 20px;
    font-size: 0.9rem;
  }
}