/* ==========================================================================
   SDN CONNEXIONS - SIMPLE, CLEAN & MODERN STYLES
   ========================================================================== */

:root {
  --bg-main: #0b111e;
  --bg-surface: #131c2e;
  --bg-card: #182238;
  --border-color: rgba(255, 255, 255, 0.12);
  --accent-cyan: #00e5ff;
  --accent-blue: #3b82f6;
  --accent-emerald: #10b981;
  --accent-purple: #c084fc;
  --accent-rose: #f43f5e;
  --text-main: #f8fafc;
  --text-dim: #94a3b8;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

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

body {
  background-color: var(--bg-main);
  color: var(--text-main);
  font-family: var(--font);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

#confettiCanvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 999;
}

/* Header */
.app-header {
  background: rgba(19, 28, 46, 0.95);
  border-bottom: 1px solid var(--border-color);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand .badge {
  background: var(--accent-cyan);
  color: #080d1a;
  font-weight: 900;
  font-size: 0.85rem;
  padding: 4px 8px;
  border-radius: 6px;
}

.brand h1 {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: 1.5px;
  color: #ffffff;
}

/* Round Navigator */
.round-nav {
  display: flex;
  gap: 8px;
}

.round-btn {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-color);
  color: var(--text-dim);
  padding: 6px 14px;
  border-radius: 8px;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.round-btn:hover {
  border-color: var(--accent-cyan);
  color: #ffffff;
}

.round-btn.active {
  background: var(--accent-cyan);
  color: #080d1a;
  border-color: var(--accent-cyan);
  box-shadow: 0 0 12px rgba(0, 229, 255, 0.4);
}

.round-btn.solved {
  border-color: var(--accent-emerald);
  color: var(--accent-emerald);
}

/* Header Controls */
.header-controls {
  display: flex;
  align-items: center;
  gap: 14px;
}

.simple-timer {
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border-color);
  padding: 4px 10px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: monospace;
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--accent-cyan);
}

.simple-timer.danger {
  color: var(--accent-rose);
  animation: pulse 1s infinite alternate;
}

@keyframes pulse {
  from { opacity: 0.8; }
  to { opacity: 1; transform: scale(1.05); }
}

.scoreboard-teams {
  display: flex;
  align-items: center;
  gap: 15px;
}

.team-score {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(0, 0, 0, 0.3);
  padding: 4px 10px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  font-size: 0.85rem;
  font-weight: 700;
}

.team-score strong {
  color: var(--accent-cyan);
  font-size: 1.1rem;
}

.score-pill {
  border: none;
  font-size: 0.72rem;
  font-weight: 800;
  padding: 2px 6px;
  border-radius: 4px;
  cursor: pointer;
}

.score-pill.plus { background: var(--accent-emerald); color: #080d1a; }
.score-pill.minus { background: var(--accent-rose); color: #ffffff; }

.icon-btn {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-color);
  color: #ffffff;
  padding: 6px 10px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.9rem;
}

.icon-btn:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: var(--accent-cyan);
}

/* Main Container */
.game-container {
  max-width: 1350px;
  width: 100%;
  margin: 0 auto;
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.game-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 28px 32px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.game-header {
  text-align: center;
  margin-bottom: 24px;
}

.round-indicator {
  display: inline-block;
  background: rgba(0, 229, 255, 0.15);
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 229, 255, 0.3);
  font-size: 0.75rem;
  font-weight: 800;
  padding: 3px 12px;
  border-radius: 20px;
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.round-title {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 6px;
}

.help-text {
  font-size: 0.8rem;
  color: var(--text-dim);
}

kbd {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 1px 5px;
  font-family: monospace;
  color: var(--accent-cyan);
}

/* Cards Grid */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 18px;
  margin-bottom: 24px;
}

/* Card 3D Flip */
.card-item {
  perspective: 1000px;
  height: 250px;
  cursor: pointer;
}

.card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: 12px;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  transform-style: preserve-3d;
}

.card-item.flipped .card-inner {
  transform: rotateY(180deg);
}

.card-front, .card-back {
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  overflow: hidden;
}

/* Card Front: Mystery Cover */
.card-front {
  background: var(--bg-card);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  box-shadow: inset 0 0 15px rgba(0, 0, 0, 0.4);
}

.card-item:hover .card-front {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 15px rgba(0, 229, 255, 0.2);
}

.card-front .lock-icon {
  font-size: 2.2rem;
}

.card-front .clue-title {
  font-size: 1rem;
  font-weight: 800;
  color: var(--accent-cyan);
  letter-spacing: 1px;
}

.card-front .click-hint {
  font-size: 0.75rem;
  color: var(--text-dim);
}

/* Card Back: Revealed Image */
.card-back {
  background: #090e17;
  transform: rotateY(180deg);
  display: flex;
  flex-direction: column;
  border-color: rgba(0, 229, 255, 0.4);
}

.card-img-wrap {
  flex: 1;
  width: 100%;
  height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #050811;
  padding: 6px;
}

.card-img-wrap img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: 6px;
}

.card-footer {
  padding: 8px 12px;
  background: rgba(14, 22, 38, 0.95);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-color);
}

.clue-num {
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--accent-cyan);
}

.clue-word-badge {
  font-size: 0.8rem;
  font-weight: 800;
  color: var(--accent-purple);
  background: rgba(192, 132, 252, 0.15);
  padding: 2px 8px;
  border-radius: 4px;
  border: 1px solid rgba(192, 132, 252, 0.3);
}

/* Word Ribbon */
.word-ribbon {
  display: none;
  background: rgba(0, 0, 0, 0.35);
  border: 1px dashed var(--accent-purple);
  border-radius: 10px;
  padding: 12px 18px;
  margin-bottom: 20px;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.word-ribbon.visible {
  display: flex;
}

.word-chip {
  background: rgba(192, 132, 252, 0.2);
  border: 1px solid var(--accent-purple);
  color: #ffffff;
  font-size: 0.95rem;
  font-weight: 800;
  padding: 6px 14px;
  border-radius: 6px;
  letter-spacing: 1px;
}

.plus-sign {
  color: var(--accent-cyan);
  font-size: 1.1rem;
  font-weight: 900;
}

/* Action Bar */
.action-bar {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: auto;
  flex-wrap: wrap;
}

.btn {
  padding: 10px 20px;
  border-radius: 10px;
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  border: none;
  transition: all 0.2s ease;
}

.btn-primary {
  background: var(--accent-cyan);
  color: #080d1a;
  box-shadow: 0 0 15px rgba(0, 229, 255, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 25px rgba(0, 229, 255, 0.5);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-color);
  color: #ffffff;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: var(--accent-cyan);
  transform: translateY(-2px);
}

/* Answer Box */
.answer-box {
  display: none;
  background: #0d1527;
  border: 2px solid var(--accent-cyan);
  border-radius: 14px;
  padding: 22px 28px;
  margin-top: 20px;
  text-align: center;
  box-shadow: 0 0 30px rgba(0, 229, 255, 0.2);
}

.answer-box.visible {
  display: block;
  animation: popIn 0.3s ease;
}

@keyframes popIn {
  from { opacity: 0; transform: scale(0.96); }
  to { opacity: 1; transform: scale(1); }
}

.answer-tag {
  display: inline-block;
  background: var(--accent-emerald);
  color: #080d1a;
  font-size: 0.72rem;
  font-weight: 900;
  padding: 2px 10px;
  border-radius: 12px;
  margin-bottom: 8px;
}

.answer-name {
  font-size: 2rem;
  font-weight: 900;
  letter-spacing: 1.5px;
  color: var(--accent-cyan);
  margin-bottom: 6px;
}

.answer-formula {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--accent-purple);
  margin-bottom: 12px;
}

.answer-explanation {
  font-size: 0.9rem;
  color: var(--text-dim);
  max-width: 800px;
  margin: 0 auto;
  line-height: 1.5;
}

/* Responsiveness */
@media (max-width: 768px) {
  .cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .app-header {
    flex-direction: column;
  }
}