/* ============================================================
   NEON ArGate — Design System
   ============================================================ */

:root,
[data-theme='light'] {
  --font-display: 'Clash Display', 'Satoshi', sans-serif;
  --font-body: 'Satoshi', 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;

  --color-bg: #0b0d17;
  --color-surface: #12141f;
  --color-surface-2: #181a26;
  --color-surface-3: #20232f;
  --color-border: #2a2d3d;
  --color-divider: #20232f;

  --color-text: #eef0f6;
  --color-text-muted: #9aa0b8;
  --color-text-faint: #5b6079;

  --color-primary: #00e5ff;
  --color-primary-soft: rgba(0, 229, 255, 0.12);
  --color-secondary: #ff2e9a;
  --color-secondary-soft: rgba(255, 46, 154, 0.12);
  --color-accent: #ffd23f;
  --color-success: #39e991;
  --color-danger: #ff5470;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --shadow-glow-primary: 0 0 0 1px rgba(0, 229, 255, 0.25), 0 8px 30px rgba(0, 229, 255, 0.12);
  --shadow-glow-secondary: 0 0 0 1px rgba(255, 46, 154, 0.25), 0 8px 30px rgba(255, 46, 154, 0.12);
  --shadow-card: 0 18px 50px rgba(0, 0, 0, 0.45);

  --text-xs: clamp(0.75rem, 0.7rem + 0.2vw, 0.8125rem);
  --text-sm: clamp(0.8125rem, 0.76rem + 0.25vw, 0.9375rem);
  --text-base: clamp(0.9375rem, 0.9rem + 0.2vw, 1.0625rem);
  --text-lg: clamp(1.0625rem, 0.9rem + 0.7vw, 1.375rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.2vw, 2.125rem);
  --text-2xl: clamp(2rem, 1.3rem + 2.6vw, 3.25rem);

  --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;

  --transition: 200ms cubic-bezier(0.16, 1, 0.3, 1);

  --content-narrow: 640px;
  --content-default: 1080px;
}

[data-theme='light'] {
  --color-bg: #f4f5fb;
  --color-surface: #ffffff;
  --color-surface-2: #f7f8fd;
  --color-surface-3: #eef0f7;
  --color-border: #d8dbe6;
  --color-divider: #e7e9f2;

  --color-text: #1a1d2b;
  --color-text-muted: #5b6179;
  --color-text-faint: #9aa0b8;

  --color-primary: #0090c4;
  --color-primary-soft: rgba(0, 144, 196, 0.1);
  --color-secondary: #d61d83;
  --color-secondary-soft: rgba(214, 29, 131, 0.1);
  --color-accent: #d4a017;
  --color-success: #1faa66;
  --color-danger: #e23b58;

  --shadow-glow-primary: 0 0 0 1px rgba(0, 144, 196, 0.2), 0 8px 30px rgba(0, 144, 196, 0.1);
  --shadow-glow-secondary: 0 0 0 1px rgba(214, 29, 131, 0.2), 0 8px 30px rgba(214, 29, 131, 0.1);
  --shadow-card: 0 18px 40px rgba(20, 30, 60, 0.1);
}

/* ---------------------- Base ---------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

body {
  min-height: 100dvh;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(900px 600px at 12% -8%, var(--color-primary-soft), transparent 60%),
    radial-gradient(800px 500px at 95% 0%, var(--color-secondary-soft), transparent 55%),
    radial-gradient(700px 700px at 50% 120%, rgba(255, 210, 63, 0.06), transparent 60%);
  pointer-events: none;
}

img,
svg,
canvas {
  display: block;
  max-width: 100%;
}

button {
  cursor: pointer;
  font: inherit;
  color: inherit;
  background: none;
  border: none;
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover {
  color: var(--color-secondary);
}

::selection {
  background: var(--color-primary);
  color: var(--color-bg);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---------------------- Layout ---------------------- */
.app {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

.container {
  width: 100%;
  max-width: var(--content-default);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

@media (min-width: 768px) {
  .container {
    padding-inline: var(--space-8);
  }
}

/* ---------------------- Header ---------------------- */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: color-mix(in oklab, var(--color-bg) 75%, transparent);
  border-bottom: 1px solid var(--color-divider);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  cursor: pointer;
}

.brand-mark {
  width: 34px;
  height: 34px;
  flex-shrink: 0;
  color: var(--color-primary);
  filter: drop-shadow(0 0 8px var(--color-primary));
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-lg);
  letter-spacing: -0.01em;
}

.brand-name span {
  color: var(--color-secondary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  background: var(--color-surface);
  transition: all var(--transition);
}

.icon-btn:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  transform: translateY(-1px);
}

/* ---------------------- Main ---------------------- */
.main {
  flex: 1;
  padding-block: var(--space-10) var(--space-16);
}

/* ---------------------- Hero ---------------------- */
.hero {
  margin-bottom: var(--space-10);
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background: var(--color-surface);
  margin-bottom: var(--space-5);
}

.hero-eyebrow::before {
  content: '';
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-success);
  box-shadow: 0 0 8px var(--color-success);
}

.hero-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-2xl);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
}

.hero-title .grad {
  background: linear-gradient(in oklab, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-sub {
  color: var(--color-text-muted);
  max-width: 56ch;
  font-size: var(--text-base);
}

/* ---------------------- Stats bar ---------------------- */
.stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-6);
}

.stat {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background: var(--color-surface);
  font-size: var(--text-sm);
}

.stat-num {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
}

/* ---------------------- Game grid ---------------------- */
.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-4);
  margin-bottom: var(--space-6);
}

.section-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-xl);
  letter-spacing: -0.01em;
}

.section-sub {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.game-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-12);
}

.game-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  text-align: left;
  overflow: hidden;
}

.game-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  background: radial-gradient(120px 80px at var(--mx, 50%) var(--my, 0%), var(--card-glow, var(--color-primary-soft)), transparent 70%);
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
}

.game-card:hover {
  transform: translateY(-4px);
  border-color: var(--card-color, var(--color-primary));
  box-shadow: var(--shadow-card);
}

.game-card:hover::after {
  opacity: 1;
}

.game-card-icon {
  width: 46px;
  height: 46px;
  border-radius: var(--radius-md);
  display: grid;
  place-items: center;
  background: var(--card-soft, var(--color-primary-soft));
  color: var(--card-color, var(--color-primary));
  margin-bottom: var(--space-2);
}

.game-card-icon svg {
  width: 24px;
  height: 24px;
}

.game-card-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-lg);
  letter-spacing: -0.01em;
}

.game-card-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  flex: 1;
}

.game-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-divider);
}

.game-card-tag {
  font-size: var(--text-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--card-color, var(--color-primary));
}

.game-card-best {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

/* ---------------------- Game view ---------------------- */
.game-view {
  animation: fadeUp 350ms cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  margin-bottom: var(--space-6);
  transition: color var(--transition);
}

.back-link:hover {
  color: var(--color-primary);
}

.back-link svg {
  width: 16px;
  height: 16px;
}

.game-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-6);
}

.game-title-block {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.game-badge {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: grid;
  place-items: center;
  background: var(--game-soft, var(--color-primary-soft));
  color: var(--game-color, var(--color-primary));
}

.game-badge svg {
  width: 22px;
  height: 22px;
}

.game-title-block h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-xl);
  letter-spacing: -0.01em;
  line-height: 1.1;
}

.game-title-block p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.game-score-row {
  display: flex;
  gap: var(--space-3);
}

.score-box {
  min-width: 92px;
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  text-align: center;
}

.score-box.best {
  border-color: color-mix(in oklab, var(--color-accent) 40%, var(--color-border));
}

.score-label {
  display: block;
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-faint);
  margin-bottom: 2px;
}

.score-value {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: var(--text-lg);
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
}

.score-box.best .score-value {
  color: var(--color-accent);
}

/* ---------------------- Board wrapper ---------------------- */
.board-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-5);
  padding: var(--space-6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-surface);
  box-shadow: var(--shadow-card);
}

.board-wrap.compact {
  padding: var(--space-4);
}

.game-status {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  min-height: 1.4em;
  text-align: center;
}

.game-status.win {
  color: var(--color-success);
  font-weight: 600;
}

.game-status.lose {
  color: var(--color-danger);
  font-weight: 600;
}

/* ---------------------- Buttons ---------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
  border: 1px solid var(--color-border);
  background: var(--color-surface-2);
  color: var(--color-text);
  transition: all var(--transition);
}

.btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn-primary {
  background: linear-gradient(in oklab, var(--color-primary), color-mix(in oklab, var(--color-primary), #000 25%));
  border-color: transparent;
  color: #0b0d17;
  font-weight: 600;
}

.btn-primary:hover {
  filter: brightness(1.1);
  color: #0b0d17;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: center;
}

.btn svg {
  width: 16px;
  height: 16px;
}

/* ---------------------- Footer ---------------------- */
.powered-by {
  font-size: var(--text-sm);
  color: var(--color-text-faint);
}

.hero .powered-by {
  margin-top: var(--space-6);
  font-size: var(--text-xs);
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
}

.powered-link {
  color: var(--color-secondary);
  font-weight: 600;
  transition: color var(--transition);
}

.powered-link:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* ---------------------- Overlays ---------------------- */
.overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  padding: var(--space-6);
  border-radius: var(--radius-xl);
  background: color-mix(in oklab, var(--color-surface) 88%, transparent);
  backdrop-filter: blur(6px);
  text-align: center;
  animation: fadeUp 300ms ease;
  z-index: 5;
}

.overlay-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-xl);
}

.overlay-msg {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

/* ---------------------- Toast ---------------------- */
.toast-stack {
  position: fixed;
  bottom: var(--space-6);
  left: 50%;
  translate: -50% 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  z-index: 100;
  pointer-events: none;
}

.toast {
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-full);
  background: var(--color-surface-3);
  border: 1px solid var(--color-border);
  font-size: var(--text-sm);
  color: var(--color-text);
  box-shadow: var(--shadow-card);
  animation: toastIn 250ms ease, toastOut 250ms ease 2.2s forwards;
}

@keyframes toastIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
}

@keyframes toastOut {
  to {
    opacity: 0;
    transform: translateY(10px);
  }
}

/* ---------------------- Help modal ---------------------- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(5, 7, 15, 0.7);
  backdrop-filter: blur(6px);
  display: grid;
  place-items: center;
  padding: var(--space-4);
  z-index: 90;
  animation: fadeUp 200ms ease;
}

.modal {
  width: 100%;
  max-width: 460px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-card);
}

.modal-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-lg);
  margin-bottom: var(--space-4);
}

.modal-body {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: 1.7;
}

.modal-body h4 {
  color: var(--color-text);
  font-weight: 600;
  margin: var(--space-4) 0 var(--space-2);
}

.modal-body ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.modal-body li {
  display: flex;
  gap: var(--space-2);
}

.modal-body kbd {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  padding: 2px var(--space-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface-2);
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: var(--space-6);
}

/* ---------------------- Utilities ---------------------- */
.hidden {
  display: none !important;
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* ---------------------- Play Games ---------------------- */
.icon-btn.pg-signin[data-signed-in="true"] {
  color: var(--color-success);
  border-color: var(--color-success);
}