/* ============================================
   SVOYAK — Design System (plain CSS, not Tailwind)
   Phase 2 — loaded BEFORE styles.css in layout.ejs
   ============================================ */

/* === DESIGN TOKENS === */
:root {
  /* Colors */
  --bg-base:     #0a0a0f;
  --bg-surface:  #1a1a2e;
  --bg-elevated: #16213e;
  --bg-overlay:  rgba(0, 0, 0, 0.85);

  --color-primary:        #9D4EDD;
  --color-primary-hover:  #B76EE8;
  --color-secondary:      #80ED99;
  --color-success:        #22c55e;
  --color-danger:         #ef4444;
  --color-warning:        #f97316;

  --text-primary:   #ffffff;
  --text-secondary: #cbd5e1;
  --text-muted:     #94a3b8;
  --text-inverse:   #0a0a0f;

  --border-subtle:  rgba(255, 255, 255, 0.08);
  --border-default: rgba(255, 255, 255, 0.15);
  --border-strong:  rgba(255, 255, 255, 0.25);
  --border-gold:    #9D4EDD;

  /* Typography */
  --font-display: "JetBrains Mono Variable", "JetBrains Mono", "Fira Code", monospace;
  --font-sans:    "Inter Variable", "Inter", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;

  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --text-4xl:  2.25rem;
  --text-5xl:  3rem;
  --text-score: clamp(2rem, 8vw, 4rem);
  --text-timer: clamp(2rem, 8vw, 3.5rem);

  /* Spacing (4px base) */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;

  /* Radius */
  --radius-sm:   4px;
  --radius-md:   8px;
  --radius-lg:   12px;
  --radius-xl:   16px;
  --radius-2xl:  24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm:    0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md:    0 4px 12px rgba(0, 0, 0, 0.5);
  --shadow-lg:    0 8px 24px rgba(0, 0, 0, 0.6);
  --shadow-gold:  0 4px 20px rgba(157, 78, 221, 0.35);
  --shadow-glow:  0 0 30px rgba(157, 78, 221, 0.45);

  /* Transitions */
  --duration-instant: 50ms;
  --duration-fast:    150ms;
  --duration-normal:  300ms;
  --duration-slow:    500ms;

  --ease-out:    cubic-bezier(0, 0, 0.2, 1);
  --ease-in:     cubic-bezier(0.4, 0, 1, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);

  --transition: all var(--duration-normal) var(--ease-out);
  --transition-fast: all var(--duration-fast) var(--ease-out);
  --transition-spring: all var(--duration-normal) var(--ease-spring);

  /* Z-index */
  --z-base:     0;
  --z-raised:   10;
  --z-dropdown: 100;
  --z-sticky:   200;
  --z-overlay:  1000;
  --z-modal:    1100;
  --z-toast:    1200;
  --z-confetti: 9999;
}

/* === A11Y === */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-4);
  background: var(--color-primary);
  color: var(--text-inverse);
  padding: var(--space-3) var(--space-6);
  font-weight: 600;
  border-radius: var(--radius-md);
  z-index: var(--z-toast);
  transition: top 0.2s;
}
.skip-link:focus { top: var(--space-4); }
.skip-link:not(:focus) { left: -9999px; }

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}
:focus:not(:focus-visible) { outline: none; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* === BUTTONS === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-spring);
  min-height: 44px;
  text-decoration: none;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: scale(0.97); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.btn-primary { background: var(--color-primary); color: var(--text-inverse); }
.btn-primary:hover { background: var(--color-primary-hover); box-shadow: var(--shadow-gold); }

.btn-secondary { background: var(--bg-elevated); color: var(--text-primary); }
.btn-secondary:hover { background: var(--bg-surface); box-shadow: var(--shadow-md); }

.btn-correct { background: var(--color-success); color: white; }
.btn-correct:hover { background: #16a34a; box-shadow: 0 4px 20px rgba(34, 197, 94, 0.4); }

.btn-wrong { background: var(--color-danger); color: white; }
.btn-wrong:hover { background: #dc2626; box-shadow: 0 4px 20px rgba(239, 68, 68, 0.4); }

.btn-ghost { background: transparent; border: 1px solid var(--border-default); color: var(--text-primary); }
.btn-ghost:hover { border-color: var(--color-primary); }

.btn-correct-lg, .btn-wrong-lg {
  font-size: var(--text-2xl);
  padding: var(--space-6) var(--space-10);
  min-height: 64px;
}

.btn-buzz {
  width: 80vw;
  height: 80vw;
  max-width: 320px;
  max-height: 320px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  color: white;
  font-size: var(--text-3xl);
  font-weight: 800;
  border: 8px solid var(--color-secondary);
  cursor: pointer;
  transition: var(--transition-spring);
  box-shadow: 0 0 40px rgba(157, 78, 221, 0.6);
}
.btn-buzz:hover:not(:disabled) {
  transform: scale(1.05);
  box-shadow: 0 0 60px rgba(157, 78, 221, 0.8), 0 0 100px rgba(128, 237, 153, 0.4);
}
.btn-buzz:active:not(:disabled) {
  transform: scale(0.92);
  box-shadow: 0 0 30px rgba(157, 78, 221, 0.9);
}
.btn-buzz:disabled { opacity: 0.3; cursor: not-allowed; }

/* === CARDS === */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  backdrop-filter: blur(12px);
  transition: var(--transition);
}
.card-hover:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-default);
}

.stat-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  text-align: center;
  transition: var(--transition);
}
.stat-card:hover { border-color: var(--color-primary); transform: translateY(-2px); }
.stat-value { font-family: var(--font-display); font-size: var(--text-4xl); font-weight: 700; color: var(--color-primary); line-height: 1; }
.stat-label { font-size: var(--text-sm); color: var(--text-muted); margin-top: var(--space-2); }

/* === GAME BOARD === */
.board-grid {
  display: grid;
  grid-template-columns: 200px repeat(6, minmax(0, 1fr));
  gap: var(--space-2);
  overflow-x: auto;
}
@media (max-width: 768px) {
  .board-grid { grid-template-columns: 150px repeat(6, minmax(0, 1fr)); }
}

.question-cell {
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-2);
  text-align: center;
  cursor: pointer;
  border: 2px solid transparent;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-xl);
  color: var(--color-primary);
  min-height: 64px;
  transition: var(--transition);
}
.question-cell:hover:not(.played) {
  background: rgba(157, 78, 221, 0.15);
  transform: translateY(-2px) scale(1.02);
  border-color: var(--color-primary);
}
.question-cell.played { opacity: 0.3; cursor: not-allowed; transform: none; }
.question-cell.revealing { animation: cardFlip 0.5s var(--ease-spring); }

.topic-cell {
  background: rgba(157, 78, 221, 0.15);
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: var(--text-base);
  color: var(--text-primary);
  padding: var(--space-4);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

/* === TEAM CARDS === */
.team-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: var(--transition);
  cursor: pointer;
}
.team-card:hover:not(:disabled):not(.team-taken) {
  transform: translateY(-4px);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-gold);
}
.team-card.team-taken { opacity: 0.4; cursor: not-allowed; }
.team-card--active {
  background: rgba(157, 78, 221, 0.25);
  border: 2px solid var(--color-primary);
  box-shadow: var(--shadow-glow);
}

/* === SCORE & TIMER === */
.score-display {
  font-family: var(--font-display);
  font-size: var(--text-score);
  font-weight: 700;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}
.score-name { font-size: var(--text-base); color: var(--text-secondary); margin-top: var(--space-2); }

.timer-display {
  font-family: var(--font-display);
  font-size: var(--text-timer);
  font-weight: 700;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
  line-height: 1;
  transition: color var(--duration-fast);
}
.timer-display.warning {
  color: var(--color-danger);
  animation: timerPulse 0.5s var(--ease-in-out) infinite;
}

/* === MODAL & TOAST === */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg-overlay);
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
}
.modal-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  max-width: 800px;
  width: 100%;
  text-align: center;
  animation: modalIn 0.3s var(--ease-spring);
}

.toast {
  position: fixed;
  top: var(--space-6);
  right: var(--space-6);
  padding: var(--space-4) var(--space-6);
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  z-index: var(--z-toast);
  animation: toastIn 0.3s var(--ease-spring);
  max-width: 360px;
}
.toast--success { border-left: 4px solid var(--color-success); }
.toast--error   { border-left: 4px solid var(--color-danger); }
.toast--gold    { border-left: 4px solid var(--color-primary); }

/* === FORMS === */
.form-group { margin-bottom: var(--space-4); }
.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
}
.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--bg-elevated);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  min-height: 44px;
  transition: var(--transition-fast);
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(157, 78, 221, 0.2);
}
.field-error { font-size: var(--text-sm); color: var(--color-danger); margin-top: var(--space-1); min-height: 1.25rem; }
.form-error {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid var(--color-danger);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  color: var(--color-danger);
  margin-bottom: var(--space-4);
}

/* === AUTH CARD === */
.auth-card {
  max-width: 420px;
  margin: var(--space-16) auto;
  padding: var(--space-10);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-2xl);
  backdrop-filter: blur(12px);
}
.auth-title { font-size: var(--text-3xl); font-weight: 700; text-align: center; margin-bottom: var(--space-2); }

/* === SPLASH (главная страница) === */
.splash {
  min-height: calc(100vh - 0px); /* без navbar — full viewport */
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8) var(--space-4);
  background:
    radial-gradient(ellipse at top, rgba(157, 78, 221, 0.18), transparent 60%),
    radial-gradient(ellipse at bottom right, rgba(128, 237, 153, 0.10), transparent 60%),
    var(--bg-base);
}
.splash-inner {
  max-width: 880px;
  width: 100%;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-8);
  animation: fadeIn 0.6s var(--ease-out);
}
.splash-logo {
  width: 100%;
  max-width: 360px;
  height: auto;
  filter: drop-shadow(0 8px 24px rgba(157, 78, 221, 0.35));
}
.splash-tagline {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  font-weight: 700;
  margin: 0;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.splash-cta {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}
.splash-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-4);
  width: 100%;
  margin-top: var(--space-4);
}
.splash-feature {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  text-align: left;
  transition: var(--transition);
}
.splash-feature:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.splash-feature-icon {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-3);
}
.splash-feature-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}
.splash-feature-text {
  font-size: var(--text-sm);
  color: var(--text-muted);
  line-height: 1.5;
}

/* === JOIN PAGE (ввод кода игры) === */
.join-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8) var(--space-4);
  background:
    radial-gradient(ellipse at center, rgba(157, 78, 221, 0.15), transparent 70%),
    var(--bg-base);
}
.join-card {
  max-width: 460px;
  width: 100%;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-2xl);
  padding: var(--space-10);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-lg);
  animation: fadeIn 0.4s var(--ease-out);
}
.join-logo {
  display: block;
  width: 120px;
  height: auto;
  margin: 0 auto var(--space-6);
}
.join-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  text-align: center;
  margin: 0 0 var(--space-2);
  color: var(--text-primary);
}
.join-subtitle {
  font-size: var(--text-base);
  color: var(--text-muted);
  text-align: center;
  margin: 0 0 var(--space-8);
  line-height: 1.5;
}
.join-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.join-code-input {
  width: 100%;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 6vw, 2.25rem);
  font-weight: 700;
  text-align: center;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  padding: var(--space-5) var(--space-4);
  background: var(--bg-elevated);
  border: 2px solid var(--border-default);
  border-radius: var(--radius-lg);
  color: var(--color-primary);
  transition: var(--transition-fast);
}
.join-code-input::placeholder {
  color: var(--text-muted);
  opacity: 0.4;
}
.join-code-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(157, 78, 221, 0.2);
}
.join-submit {
  width: 100%;
  padding: var(--space-4) var(--space-6);
  font-size: var(--text-lg);
}
.join-hint {
  text-align: center;
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-top: var(--space-6);
}
.join-hint a {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 600;
}
.join-hint a:hover { text-decoration: underline; }

/* === NAVBAR === */
.navbar {
  background: rgba(26, 26, 46, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  padding: var(--space-4) var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
}
.navbar-brand { font-family: var(--font-display); font-size: var(--text-xl); font-weight: 700; color: var(--color-primary); text-decoration: none; }
.navbar-links { display: flex; gap: var(--space-4); align-items: center; }
.navbar-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--text-sm);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
}
.navbar-link:hover { color: var(--text-primary); background: var(--bg-elevated); }
.navbar-link--active { color: var(--color-primary); }

.page-container { max-width: 1280px; margin: 0 auto; padding: var(--space-8) var(--space-6); }
.page-title { font-size: var(--text-3xl); font-weight: 700; margin-bottom: var(--space-2); }
.page-subtitle { color: var(--text-muted); margin-bottom: var(--space-6); }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.quick-actions {
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
  flex-wrap: wrap;
}

.search-input {
  width: 100%;
  max-width: 400px;
  padding: var(--space-3) var(--space-4);
  background: var(--bg-elevated);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.data-table th, .data-table td {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  border-bottom: 1px solid var(--border-subtle);
}
.data-table th {
  background: var(--bg-elevated);
  color: var(--text-secondary);
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.data-table tr:hover td { background: rgba(255, 255, 255, 0.03); }

.filter-pills {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
}
.filter-pill {
  padding: var(--space-2) var(--space-4);
  background: var(--bg-elevated);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  cursor: pointer;
  font-size: var(--text-sm);
  transition: var(--transition-fast);
}
.filter-pill:hover { border-color: var(--color-primary); }
.filter-pill--active {
  background: var(--color-primary);
  color: var(--text-inverse);
  border-color: var(--color-primary);
}

.steps { display: flex; gap: var(--space-2); margin-bottom: var(--space-6); }
.step {
  flex: 1;
  padding: var(--space-3);
  background: var(--bg-elevated);
  border-radius: var(--radius-md);
  text-align: center;
  font-size: var(--text-sm);
  color: var(--text-muted);
  transition: var(--transition);
}
.step--active { background: var(--color-primary); color: var(--text-inverse); font-weight: 600; }
.step--done {
  background: rgba(34, 197, 94, 0.2);
  color: var(--color-success);
  border: 1px solid var(--color-success);
}

.code-input {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 5vw, 2rem);
  text-align: center;
  letter-spacing: 0.5em;
  text-transform: uppercase;
  padding: var(--space-6) !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* === ANIMATIONS === */
@keyframes cardFlip {
  0%   { transform: rotateY(0deg) scale(1); opacity: 1; }
  50%  { transform: rotateY(90deg) scale(1.05); opacity: 0.5; }
  100% { transform: rotateY(0deg) scale(1); opacity: 1; }
}
@keyframes timerPulse {
  0%, 100% { transform: scale(1); }
  50%       { transform: scale(1.08); }
}
@keyframes toastIn {
  from { transform: translateX(120%); opacity: 0; }
  to   { transform: translateX(0);    opacity: 1; }
}
@keyframes modalIn {
  from { transform: scale(0.9); opacity: 0; }
  to   { transform: scale(1);   opacity: 1; }
}
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  10%, 30%, 50%, 70%, 90% { transform: translateX(-6px); }
  20%, 40%, 60%, 80%       { transform: translateX(6px); }
}
@keyframes scoreBump {
  0%   { transform: scale(1); }
  50%  { transform: scale(1.2); color: var(--color-primary); }
  100% { transform: scale(1); }
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 20px rgba(157, 78, 221, 0.3); }
  50%       { box-shadow: 0 0 40px rgba(157, 78, 221, 0.7); }
}