/* Aurobindo Pharma · Game 2: Symptom → Probable Cause Matching */
:root {
  --bg-deep: #090d16;
  --bg-surface: #111827;
  --bg-card: rgba(22, 30, 49, 0.85);
  --bg-card-hover: rgba(30, 42, 69, 0.95);
  --border-subtle: rgba(255, 255, 255, 0.1);
  --border-active: #38bdf8;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --title-gradient: linear-gradient(135deg, #ffffff 40%, #93c5fd 100%);
  --title-fallback: #ffffff;
  --stats-bg: rgba(0, 0, 0, 0.2);
  --stats-border: rgba(255, 255, 255, 0.05);
  --stat-label: #64748b;
  --gold: #f59e0b;
  --gold-glow: rgba(245, 158, 11, 0.35);
  --cyan: #06b6d4;
  --cyan-glow: rgba(6, 182, 212, 0.4);
  --success: #10b981;
  --success-glow: rgba(16, 185, 129, 0.4);
  --danger: #ef4444;
  --danger-glow: rgba(239, 68, 68, 0.4);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

[data-theme="light"] {
  --bg-deep: #f1f5f9;
  --bg-surface: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #f8fafc;
  --border-subtle: rgba(0, 0, 0, 0.08);
  --border-active: #0284c7;
  --text-main: #0f172a;
  --text-muted: #334155;
  --text-dim: #64748b;
  --title-gradient: linear-gradient(135deg, #091e42 10%, #1e40af 55%, #0284c7 100%);
  --title-fallback: #091e42;
  --stats-bg: #f8fafc;
  --stats-border: rgba(0, 0, 0, 0.08);
  --stat-label: #475569;
}

[data-theme="light"] .sm-intro-title {
  color: #091e42 !important;
  background: linear-gradient(135deg, #091e42 10%, #1e40af 55%, #0284c7 100%) !important;
  -webkit-background-clip: text !important;
  background-clip: text !important;
  -webkit-text-fill-color: transparent !important;
}

[data-theme="light"] .sm-intro-card {
  background: #ffffff;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
  border-color: rgba(0, 0, 0, 0.08);
}

[data-theme="light"] .sm-intro-tag {
  background: rgba(2, 132, 199, 0.08);
  color: #0284c7;
  border-color: rgba(2, 132, 199, 0.25);
}

[data-theme="light"] .sm-intro-desc {
  color: #334155;
}

[data-theme="light"] .sm-intro-stats {
  background: #f8fafc;
  border-color: rgba(0, 0, 0, 0.08);
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.03);
}

[data-theme="light"] .sm-stat-box strong {
  color: #d97706;
}

[data-theme="light"] .sm-stat-box span {
  color: #475569;
  font-weight: 700;
}

[data-theme="light"] .sm-header {
  background: rgba(255, 255, 255, 0.95);
  border-bottom-color: rgba(0, 0, 0, 0.08);
}

[data-theme="light"] .sm-brand-title {
  color: #0f172a;
}

[data-theme="light"] .sm-brand-badge {
  color: #0284c7;
}

[data-theme="light"] .sm-btn-icon,
[data-theme="light"] .sm-btn-back {
  background: rgba(0, 0, 0, 0.04);
  border-color: rgba(0, 0, 0, 0.1);
  color: #0f172a;
}

[data-theme="light"] .sm-btn-icon:hover,
[data-theme="light"] .sm-btn-back:hover {
  background: rgba(0, 0, 0, 0.08);
}

[data-theme="light"] .sm-card {
  background: #ffffff;
  border-color: rgba(0, 0, 0, 0.12);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

[data-theme="light"] .sm-card:hover {
  background: #f8fafc;
  border-color: #0284c7;
  box-shadow: 0 4px 12px rgba(2, 132, 199, 0.12);
}

[data-theme="light"] .sm-card.is-selected {
  background: #f0f9ff;
  border-color: #0284c7;
  box-shadow: 0 0 16px rgba(2, 132, 199, 0.25);
}

[data-theme="light"] .sm-card.is-connected {
  background: #f8fafc;
  border-color: rgba(0, 0, 0, 0.16);
}

[data-theme="light"] .sm-card-label {
  color: #0f172a;
}

[data-theme="light"] .sm-socket {
  background: #e2e8f0;
  border-color: #cbd5e1;
}

[data-theme="light"] .sm-socket::after {
  background: #64748b;
}

[data-theme="light"] .sm-column-left .sm-column-header {
  color: #0284c7;
}

[data-theme="light"] .sm-column-right .sm-column-header {
  color: #7c3aed;
}

[data-theme="light"] .sm-status-bar {
  background: #ffffff;
  border-color: rgba(0, 0, 0, 0.08);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
}

[data-theme="light"] .sm-time-badge {
  background: rgba(2, 132, 199, 0.08);
  color: #0369a1;
  border-color: rgba(2, 132, 199, 0.25);
}

[data-theme="light"] .sm-instructions-banner {
  background: rgba(2, 132, 199, 0.06);
  border-color: rgba(2, 132, 199, 0.2);
  color: #334155;
}

[data-theme="light"] .sm-instructions-banner strong {
  color: #0284c7;
}

[data-theme="light"] .sm-btn-secondary {
  background: #ffffff;
  border-color: rgba(0, 0, 0, 0.12);
  color: #0f172a;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
}

[data-theme="light"] .sm-btn-secondary:hover:not(:disabled) {
  background: #f1f5f9;
}

[data-theme="light"] .sm-modal-backdrop {
  background: rgba(15, 23, 42, 0.6);
}

[data-theme="light"] .sm-modal-card {
  background: #ffffff;
  border-color: rgba(0, 0, 0, 0.1);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

[data-theme="light"] .sm-modal-title {
  color: #0f172a;
}

[data-theme="light"] .sm-modal-subtitle {
  color: #475569;
}

[data-theme="light"] .sm-score-banner {
  background: #f8fafc;
  border-color: rgba(0, 0, 0, 0.08);
}

[data-theme="light"] .sm-review-item {
  background: #f8fafc;
  border-color: rgba(0, 0, 0, 0.08);
}

[data-theme="light"] .sm-review-symptom {
  color: #0f172a;
}

[data-theme="light"] .sm-review-cause {
  color: #0284c7;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

[hidden],
.sm-modal-backdrop[hidden],
.sm-gameplay[hidden],
.sm-intro-card[hidden] {
  display: none !important;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-deep);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background-image: 
    radial-gradient(ellipse at 20% 0%, rgba(56, 189, 248, 0.12) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 10%, rgba(139, 92, 246, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 50% 90%, rgba(245, 158, 11, 0.08) 0%, transparent 60%);
  background-attachment: fixed;
}

/* App Header */
.sm-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: rgba(9, 13, 22, 0.85);
  border-bottom: 1px solid var(--border-subtle);
  padding: 12px 20px;
}

.sm-header-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.sm-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
}

.sm-brand-logo {
  height: 38px;
  width: auto;
  border-radius: var(--radius-sm);
  background: white;
  padding: 2px 6px;
  object-fit: contain;
}

.sm-brand-text {
  display: flex;
  flex-direction: column;
}

.sm-brand-title {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--text-main);
  line-height: 1.2;
}

.sm-brand-badge {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--cyan);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.sm-header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.sm-btn-icon {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 1.1rem;
}

.sm-btn-icon:hover {
  background: rgba(255, 255, 255, 0.12);
  transform: translateY(-1px);
}

.sm-btn-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  text-decoration: none;
  transition: all 0.2s ease;
}

.sm-btn-back:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.25);
  transform: translateX(-2px);
}

/* Main Container */
.sm-main {
  flex: 1;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 24px 20px 40px;
  display: flex;
  flex-direction: column;
}

/* Intro / Title Screen */
.sm-intro-card {
  max-width: 680px;
  margin: 40px auto;
  padding: 40px 32px;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
  text-align: center;
  animation: fadeIn 0.4s ease;
}

.sm-intro-tag {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(6, 182, 212, 0.15);
  color: var(--cyan);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 16px;
  border: 1px solid rgba(6, 182, 212, 0.3);
}

.sm-intro-title {
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 14px;
  color: var(--title-fallback, #ffffff);
  background: var(--title-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.sm-intro-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 28px;
}

.sm-intro-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 32px;
  padding: 20px;
  background: var(--stats-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--stats-border);
}

.sm-stat-box strong {
  display: block;
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--gold);
}

.sm-stat-box span {
  font-size: 0.8rem;
  color: var(--stat-label);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
}

.sm-btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 36px;
  border-radius: 999px;
  background: linear-gradient(135deg, #f59e0b, #d97706);
  color: #0b0f19;
  font-size: 1.05rem;
  font-weight: 700;
  border: none;
  cursor: pointer;
  box-shadow: 0 8px 24px var(--gold-glow);
  transition: all 0.25s ease;
}

.sm-btn-primary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 12px 30px rgba(245, 158, 11, 0.5);
}

.sm-btn-primary:active {
  transform: translateY(0);
}

/* Gameplay Section */
.sm-gameplay {
  display: flex;
  flex-direction: column;
  gap: 20px;
  position: relative;
}

/* Game Status Bar */
.sm-status-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  padding: 14px 20px;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
}

.sm-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.sm-status-pill strong {
  color: var(--text-main);
  font-size: 1.05rem;
}

.sm-time-badge {
  background: rgba(6, 182, 212, 0.12);
  color: var(--cyan);
  padding: 4px 12px;
  border-radius: 999px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  border: 1px solid rgba(6, 182, 212, 0.3);
}

.sm-time-badge.warning {
  background: rgba(239, 68, 68, 0.15);
  color: var(--danger);
  border-color: rgba(239, 68, 68, 0.4);
  animation: pulseWarning 1s infinite alternate;
}

.sm-instructions-banner {
  text-align: center;
  font-size: 0.95rem;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.03);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  border: 1px dashed var(--border-subtle);
}

.sm-instructions-banner strong {
  color: var(--cyan);
}

/* Matching Arena (Two Columns + Dynamic SVG) */
.sm-arena-container {
  position: relative;
  width: 100%;
  margin: 10px auto;
  user-select: none;
}

.sm-arena-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: 120px;
  row-gap: 16px;
  position: relative;
  z-index: 2;
}

.sm-column {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sm-column-cards {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.sm-column-header {
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-dim);
  padding: 0 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.sm-column-left .sm-column-header {
  color: #38bdf8;
}

.sm-column-right .sm-column-header {
  color: #c084fc;
}

/* Item Card */
.sm-card {
  position: relative;
  padding: 14px 18px;
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  align-items: center;
  min-height: 60px;
  touch-action: none;
}

.sm-column-left .sm-card {
  padding-right: 22px;
  justify-content: flex-start;
  text-align: left;
}

.sm-column-right .sm-card {
  padding-left: 22px;
  justify-content: flex-start;
  text-align: left;
}

.sm-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
}

.sm-card-label {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.3;
  word-break: break-word;
}

/* Selected state */
.sm-card.is-selected {
  border-color: var(--cyan);
  box-shadow: 0 0 16px var(--cyan-glow);
  background: rgba(6, 182, 212, 0.15);
  transform: scale(1.02);
}

/* Matched state */
.sm-card.is-connected {
  border-color: rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.06);
}

.sm-card.is-correct {
  border-color: var(--success) !important;
  background: rgba(16, 185, 129, 0.15) !important;
  box-shadow: 0 0 12px var(--success-glow);
}

.sm-card.is-wrong {
  border-color: var(--danger) !important;
  background: rgba(239, 68, 68, 0.15) !important;
  box-shadow: 0 0 12px var(--danger-glow);
  animation: wobble 0.4s ease;
}

/* Connector Port / Socket */
.sm-socket {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #1e293b;
  border: 2px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  z-index: 5;
  pointer-events: none;
}

.sm-socket::after {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-dim);
  transition: all 0.2s ease;
}

.sm-column-left .sm-socket {
  right: -10px;
}

.sm-column-right .sm-socket {
  left: -10px;
}

.sm-card:hover .sm-socket,
.sm-card.is-selected .sm-socket {
  border-color: var(--cyan);
  box-shadow: 0 0 8px var(--cyan);
}

.sm-card:hover .sm-socket::after,
.sm-card.is-selected .sm-socket::after {
  background: var(--cyan);
}

/* SVG Line Canvas Overlay */
.sm-canvas-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 4;
}

.sm-wire {
  fill: none;
  stroke-width: 4px;
  stroke-linecap: round;
  vector-effect: non-scaling-stroke;
  transition: stroke 0.3s ease, stroke-width 0.2s ease;
  filter: drop-shadow(0 0 6px currentColor);
}

.sm-wire.wire-active {
  stroke: var(--cyan);
  stroke-dasharray: 6 6;
  animation: wireFlow 0.8s linear infinite;
}

.sm-wire.wire-correct {
  stroke: var(--success) !important;
  stroke-width: 5px;
  filter: drop-shadow(0 0 8px var(--success));
}

.sm-wire.wire-wrong {
  stroke: var(--danger) !important;
  stroke-width: 4px;
  stroke-dasharray: 8 4;
  filter: drop-shadow(0 0 8px var(--danger));
}

@keyframes wireFlow {
  to {
    stroke-dashoffset: -24;
  }
}

/* Bottom Action Bar */
.sm-action-bar {
  margin-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.sm-btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.sm-btn-secondary:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.25);
}

.sm-btn-submit {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 32px;
  border-radius: 999px;
  background: linear-gradient(135deg, #10b981, #059669);
  color: white;
  font-size: 1.05rem;
  font-weight: 700;
  border: none;
  cursor: pointer;
  box-shadow: 0 6px 20px var(--success-glow);
  transition: all 0.2s ease;
}

.sm-btn-submit:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(16, 185, 129, 0.6);
}

.sm-btn-submit:disabled,
.sm-btn-secondary:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* Results Modal */
.sm-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(4, 7, 14, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 100;
  animation: fadeIn 0.3s ease;
}

.sm-modal-card {
  max-width: 640px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
  text-align: center;
  position: relative;
  animation: scaleUp 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.sm-modal-badge {
  font-size: 3.2rem;
  margin-bottom: 12px;
  animation: bounce 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.sm-modal-title {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 6px;
  color: var(--text-main);
}

.sm-modal-subtitle {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.sm-score-banner {
  background: rgba(0, 0, 0, 0.25);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 24px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  justify-content: space-around;
  align-items: center;
}

.sm-score-number {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--gold);
}

.sm-score-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-dim);
}

.sm-stars-container {
  display: flex;
  gap: 4px;
  font-size: 1.5rem;
  color: var(--gold);
  justify-content: center;
  margin-top: 4px;
}

/* Solutions Review List */
.sm-review-section {
  text-align: left;
  margin-bottom: 28px;
}

.sm-review-heading {
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.sm-review-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sm-review-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  font-size: 0.9rem;
  gap: 12px;
}

.sm-review-item.is-correct {
  border-left: 4px solid var(--success);
}

.sm-review-item.is-wrong {
  border-left: 4px solid var(--danger);
}

.sm-review-symptom {
  font-weight: 600;
  color: var(--text-main);
  flex: 1;
}

.sm-review-arrow {
  color: var(--text-dim);
}

.sm-review-cause {
  color: var(--cyan);
  font-weight: 600;
  flex: 1;
  text-align: right;
}

.sm-review-status {
  margin-left: 8px;
  font-weight: 700;
}

.sm-review-status.correct {
  color: var(--success);
}

.sm-review-status.wrong {
  color: var(--danger);
}

/* Modal Actions */
.sm-modal-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Confetti Container */
.sm-confetti-canvas {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 101;
}

/* Keyframe Animations */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes scaleUp {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes bounce {
  0% { transform: scale(0.5); opacity: 0; }
  60% { transform: scale(1.15); }
  100% { transform: scale(1); opacity: 1; }
}

@keyframes wobble {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-6px); }
  40%, 80% { transform: translateX(6px); }
}

@keyframes pulseWarning {
  from { transform: scale(1); }
  to { transform: scale(1.05); }
}

/* Responsive Breakpoints & Mobile Optimization */
@media (max-width: 900px) {
  .sm-arena-grid {
    column-gap: 60px;
  }
  .sm-card {
    padding: 12px 16px;
    min-height: 56px;
  }
  .sm-column-left .sm-card {
    padding-right: 20px;
  }
  .sm-column-right .sm-card {
    padding-left: 20px;
  }
  .sm-card-label {
    font-size: 0.9rem;
  }
}

@media (max-width: 640px) {
  /* Header */
  .sm-header {
    padding: 8px 12px;
  }
  .sm-brand {
    gap: 8px;
  }
  .sm-brand-logo {
    height: 30px;
    padding: 2px 4px;
  }
  .sm-brand-title {
    font-size: 0.88rem;
    line-height: 1.15;
  }
  .sm-brand-badge {
    display: none;
  }
  .sm-header-actions {
    gap: 6px;
  }
  .sm-btn-icon {
    width: 34px;
    height: 34px;
    font-size: 0.95rem;
  }
  .sm-btn-back {
    padding: 6px 10px;
    font-size: 0.8rem;
    gap: 4px;
  }
  .sm-back-text {
    display: none;
  }

  /* Main Container */
  .sm-main {
    padding: 12px 10px 28px;
  }

  /* Intro Screen */
  .sm-intro-card {
    margin: 12px auto;
    padding: 22px 14px;
    border-radius: 16px;
  }
  .sm-intro-tag {
    font-size: 0.72rem;
    padding: 4px 12px;
    margin-bottom: 12px;
  }
  .sm-intro-title {
    font-size: 1.55rem;
    margin-bottom: 10px;
  }
  .sm-intro-desc {
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: 18px;
  }
  .sm-intro-stats {
    gap: 6px;
    padding: 12px 6px;
    margin-bottom: 22px;
  }
  .sm-stat-box strong {
    font-size: 1.45rem;
  }
  .sm-stat-box span {
    font-size: 0.68rem;
    letter-spacing: 0.2px;
  }
  .sm-btn-primary {
    width: 100%;
    padding: 13px 20px;
    font-size: 1rem;
    box-sizing: border-box;
  }

  /* Status Bar */
  .sm-status-bar {
    padding: 8px 12px;
    gap: 8px;
    border-radius: 10px;
  }
  .sm-status-pill {
    font-size: 0.82rem;
  }
  .sm-status-pill strong {
    font-size: 0.95rem;
  }
  .sm-time-badge {
    padding: 3px 10px;
    font-size: 0.82rem;
  }

  /* Instructions */
  .sm-instructions-banner {
    padding: 6px 10px;
    font-size: 0.78rem;
    line-height: 1.35;
  }

  /* Matching Arena */
  .sm-arena-container {
    margin: 6px auto;
  }
  .sm-arena-grid {
    column-gap: 34px;
    row-gap: 8px;
  }
  .sm-column {
    gap: 8px;
  }
  .sm-column-cards {
    gap: 8px;
  }
  .sm-column-header {
    font-size: 0.76rem;
    letter-spacing: 0.5px;
    margin-bottom: 2px;
  }
  .sm-card {
    padding: 9px 12px;
    min-height: 52px;
    border-radius: 10px;
  }
  .sm-column-left .sm-card {
    padding-right: 18px;
    padding-left: 10px;
  }
  .sm-column-right .sm-card {
    padding-left: 18px;
    padding-right: 10px;
  }
  .sm-card-label {
    font-size: 0.82rem;
    line-height: 1.25;
  }
  .sm-socket {
    width: 17px;
    height: 17px;
  }
  .sm-socket::after {
    width: 6px;
    height: 6px;
  }
  .sm-column-left .sm-socket {
    right: -8px;
  }
  .sm-column-right .sm-socket {
    left: -8px;
  }

  /* Action Bar */
  .sm-action-bar {
    margin-top: 14px;
    display: flex;
    flex-direction: column-reverse;
    gap: 10px;
  }
  .sm-btn-submit {
    width: 100%;
    padding: 13px 20px;
    font-size: 1rem;
    justify-content: center;
    box-sizing: border-box;
  }
  .sm-btn-secondary {
    width: 100%;
    padding: 10px 16px;
    font-size: 0.88rem;
    justify-content: center;
    box-sizing: border-box;
  }

  /* Modal */
  .sm-modal-backdrop {
    padding: 10px;
  }
  .sm-modal-card {
    padding: 20px 14px;
    max-height: 94vh;
    border-radius: 16px;
  }
  .sm-modal-badge {
    font-size: 2.4rem;
    margin-bottom: 6px;
  }
  .sm-modal-title {
    font-size: 1.3rem;
  }
  .sm-modal-subtitle {
    font-size: 0.82rem;
    margin-bottom: 16px;
  }
  .sm-score-banner {
    padding: 12px 8px;
    margin-bottom: 16px;
  }
  .sm-score-number {
    font-size: 1.7rem;
  }
  .sm-review-heading {
    font-size: 0.78rem;
  }
  .sm-review-item {
    padding: 8px 10px;
    font-size: 0.78rem;
    gap: 6px;
  }
  .sm-modal-actions {
    flex-direction: column;
    gap: 8px;
  }
  .sm-modal-actions .sm-btn-primary,
  .sm-modal-actions .sm-btn-secondary {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 360px) {
  .sm-arena-grid {
    column-gap: 26px;
  }
  .sm-card {
    padding: 8px 8px;
    min-height: 48px;
  }
  .sm-column-left .sm-card {
    padding-right: 14px;
  }
  .sm-column-right .sm-card {
    padding-left: 14px;
  }
  .sm-card-label {
    font-size: 0.76rem;
  }
  .sm-socket {
    width: 15px;
    height: 15px;
  }
  .sm-column-left .sm-socket {
    right: -7px;
  }
  .sm-column-right .sm-socket {
    left: -7px;
  }
}