/* ========================================================================
   Variables
   ======================================================================== */
:root {
  /* Color Palette - Dark Fantasy, Neon Accents */
  --color-bg: #050511;
  --color-bg-elevated: #0c0c1a;
  --color-bg-card: #111129;
  --color-bg-soft: #15152f;

  --color-text: #f4f4ff;
  --color-text-muted: #9a9ac4;
  --color-border-subtle: rgba(255, 255, 255, 0.06);

  --color-primary: #8f5cff; /* neon violet */
  --color-primary-soft: rgba(143, 92, 255, 0.12);
  --color-primary-strong: #c69cff;

  --color-accent-blue: #28d1ff;
  --color-accent-cyan-soft: rgba(40, 209, 255, 0.1);
  --color-accent-pink: #ff4fa3;

  --color-success: #3ad69d;
  --color-success-soft: rgba(58, 214, 157, 0.15);
  --color-warning: #ffcc4d;
  --color-warning-soft: rgba(255, 204, 77, 0.16);
  --color-danger: #ff4b6e;
  --color-danger-soft: rgba(255, 75, 110, 0.16);

  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2933;
  --gray-900: #111827;

  /* Typography */
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  --font-display: "Poppins", system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", ui-monospace, SFMono-Regular,
    Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  /* Base font sizes (mobile-first) */
  --font-size-xs: 0.75rem;   /* 12px */
  --font-size-sm: 0.875rem;  /* 14px */
  --font-size-base: 1rem;    /* 16px */
  --font-size-md: 1.0625rem; /* 17px */
  --font-size-lg: 1.125rem;  /* 18px */
  --font-size-xl: 1.25rem;   /* 20px */
  --font-size-2xl: 1.5rem;   /* 24px */
  --font-size-3xl: 1.875rem; /* 30px */
  --font-size-4xl: 2.25rem;  /* 36px */
  --font-size-5xl: 3rem;     /* 48px */

  /* Line heights */
  --line-height-tight: 1.15;
  --line-height-snug: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.7;

  /* Spacing scale (0–96px) */
  --space-0: 0;
  --space-1: 0.25rem;  /* 4px */
  --space-2: 0.5rem;   /* 8px */
  --space-3: 0.75rem;  /* 12px */
  --space-4: 1rem;     /* 16px */
  --space-5: 1.25rem;  /* 20px */
  --space-6: 1.5rem;   /* 24px */
  --space-7: 1.75rem;  /* 28px */
  --space-8: 2rem;     /* 32px */
  --space-10: 2.5rem;  /* 40px */
  --space-12: 3rem;    /* 48px */
  --space-16: 4rem;    /* 64px */
  --space-20: 5rem;    /* 80px */
  --space-24: 6rem;    /* 96px */

  /* Radius */
  --radius-xs: 0.25rem;
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-pill: 999px;

  /* Shadows - glow inspired */
  --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.55);
  --shadow-glow-primary: 0 0 20px rgba(143, 92, 255, 0.6);
  --shadow-glow-blue: 0 0 22px rgba(40, 209, 255, 0.6);
  --shadow-card: 0 18px 40px rgba(0, 0, 0, 0.7);

  /* Transitions */
  --transition-fast: 120ms ease-out;
  --transition-normal: 200ms ease-out;
  --transition-slow: 320ms ease-out;

  /* Layout */
  --container-width: 1120px;
  --container-padding-x: 1.25rem;
}

/* Responsive typography tweaks */
@media (min-width: 768px) {
  :root {
    --font-size-3xl: 2.125rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.25rem;
  }
}

/* ========================================================================
   Reset / Normalize
   ======================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
}

* {
  margin: 0;
}

html,
body {
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
}

img,
svg,
video,
canvas,
audio,
iframe,
embed,
object {
  display: block;
  max-width: 100%;
}

img {
  height: auto;
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
  background: none;
  border-radius: 0;
}

button {
  cursor: pointer;
}

button:disabled,
[aria-disabled="true"] {
  cursor: not-allowed;
}

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  list-style: none;
  padding: 0;
}

textarea {
  resize: vertical;
}

/* ========================================================================
   Base Styles
   ======================================================================== */
body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background: radial-gradient(circle at top, #1a1033 0, #050511 45%, #02010a 100%);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

main {
  min-height: 60vh;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--color-text);
  line-height: var(--line-height-tight);
}

h1 {
  font-size: var(--font-size-4xl);
  letter-spacing: 0.04em;
}

h2 {
  font-size: var(--font-size-3xl);
}

h3 {
  font-size: var(--font-size-2xl);
}

h4 {
  font-size: var(--font-size-xl);
}

h5 {
  font-size: var(--font-size-lg);
}

h6 {
  font-size: var(--font-size-base);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

p {
  margin-bottom: var(--space-4);
  color: var(--color-text-muted);
}

strong {
  font-weight: 600;
}

code,
pre,
kbd,
samp {
  font-family: var(--font-mono);
}

pre {
  padding: var(--space-4);
  border-radius: var(--radius-md);
  background: rgba(8, 8, 24, 0.95);
  border: 1px solid var(--color-border-subtle);
  overflow-x: auto;
}

a {
  color: var(--color-primary-strong);
  text-decoration: none;
  transition: color var(--transition-normal),
    text-shadow var(--transition-normal),
    opacity var(--transition-fast);
}

a:hover {
  color: var(--color-accent-blue);
  text-shadow: 0 0 12px rgba(40, 209, 255, 0.85);
}

hr {
  border: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  margin: var(--space-8) 0;
}

/* Selection */
::selection {
  background: rgba(143, 92, 255, 0.35);
  color: #ffffff;
}

/* ========================================================================
   Accessibility & Motion
   ======================================================================== */
:focus-visible {
  outline: 2px solid var(--color-accent-blue);
  outline-offset: 2px;
}

/* High-contrast focus ring for dark UI */
[tabindex="-1"]:focus {
  outline: none !important;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

/* ========================================================================
   Layout Utilities
   ======================================================================== */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: var(--container-padding-x);
}

.section {
  padding-block: var(--space-12);
}

@media (min-width: 768px) {
  .section {
    padding-block: var(--space-16);
  }
}

/* Flex helpers */
.flex {
  display: flex;
}

.inline-flex {
  display: inline-flex;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.flex-col {
  display: flex;
  flex-direction: column;
}

.flex-wrap {
  flex-wrap: wrap;
}

.items-center {
  align-items: center;
}

.justify-center {
  justify-content: center;
}

.gap-xs {
  gap: var(--space-2);
}

.gap-sm {
  gap: var(--space-3);
}

.gap-md {
  gap: var(--space-4);
}

.gap-lg {
  gap: var(--space-6);
}

.gap-xl {
  gap: var(--space-8);
}

/* Grid helpers */
.grid {
  display: grid;
  gap: var(--space-4);
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-6);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-6);
}

@media (max-width: 767px) {
  .grid-2,
  .grid-3 {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* Utility spacing */
.mt-0 { margin-top: 0; }
.mt-xs { margin-top: var(--space-2); }
.mt-sm { margin-top: var(--space-3); }
.mt-md { margin-top: var(--space-4); }
.mt-lg { margin-top: var(--space-6); }
.mt-xl { margin-top: var(--space-8); }

.mb-0 { margin-bottom: 0; }
.mb-xs { margin-bottom: var(--space-2); }
.mb-sm { margin-bottom: var(--space-3); }
.mb-md { margin-bottom: var(--space-4); }
.mb-lg { margin-bottom: var(--space-6); }
.mb-xl { margin-bottom: var(--space-8); }

.pt-section {
  padding-top: var(--space-12);
}

.pb-section {
  padding-bottom: var(--space-12);
}

/* Text alignment */
.text-center { text-align: center; }
.text-right { text-align: right; }

/* Width helpers */
.w-100 { width: 100%; }

/* Visibility - Screen reader only */
.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;
}

.sr-only-focusable:focus,
.sr-only-focusable:focus-visible {
  position: static;
  width: auto;
  height: auto;
  margin: 0;
  overflow: visible;
  clip: auto;
  white-space: normal;
}

/* ========================================================================
   Components - Buttons
   ======================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.7rem 1.4rem;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font-family: var(--font-display);
  font-size: var(--font-size-sm);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  position: relative;
  overflow: hidden;
  transition: background var(--transition-normal),
    border-color var(--transition-normal),
    color var(--transition-fast),
    box-shadow var(--transition-normal),
    transform var(--transition-fast),
    opacity var(--transition-fast);
}

.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 0 0, rgba(255, 255, 255, 0.22), transparent 55%);
  mix-blend-mode: screen;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal), transform var(--transition-normal);
}

.btn-primary {
  color: #ffffff;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent-blue));
  border-color: rgba(255, 255, 255, 0.12);
  box-shadow: var(--shadow-glow-primary);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 28px rgba(143, 92, 255, 0.9);
}

.btn-primary:hover::before {
  opacity: 0.9;
  transform: translate3d(6px, 0, 0);
}

.btn-ghost {
  color: var(--color-primary-strong);
  background: rgba(7, 7, 26, 0.88);
  border-color: rgba(143, 92, 255, 0.5);
}

.btn-ghost:hover {
  background: rgba(19, 19, 49, 0.96);
  box-shadow: var(--shadow-glow-blue);
}

.btn-outline {
  color: var(--color-accent-blue);
  background: transparent;
  border-color: rgba(40, 209, 255, 0.8);
}

.btn-outline:hover {
  background: var(--color-accent-cyan-soft);
  box-shadow: var(--shadow-glow-blue);
}

.btn-sm {
  padding: 0.5rem 1.1rem;
  font-size: var(--font-size-xs);
}

.btn-lg {
  padding: 0.85rem 1.75rem;
  font-size: var(--font-size-md);
}

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.55;
  box-shadow: none;
}

.btn:focus-visible {
  outline: 2px solid var(--color-accent-blue);
  outline-offset: 3px;
}

/* ========================================================================
   Components - Form Inputs
   ======================================================================== */
.field-label {
  display: block;
  margin-bottom: var(--space-2);
  font-size: var(--font-size-sm);
  color: var(--color-text);
}

.input,
.textarea,
.select {
  width: 100%;
  padding: 0.7rem 0.9rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-subtle);
  background: rgba(10, 10, 32, 0.96);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-normal);
  transition: border-color var(--transition-normal),
    box-shadow var(--transition-normal),
    background var(--transition-normal);
}

.input::placeholder,
.textarea::placeholder {
  color: rgba(154, 154, 196, 0.7);
}

.input:focus-visible,
.textarea:focus-visible,
.select:focus-visible {
  outline: none;
  border-color: var(--color-accent-blue);
  box-shadow: 0 0 0 1px rgba(40, 209, 255, 0.7), 0 0 30px rgba(40, 209, 255, 0.4);
  background: rgba(11, 12, 44, 0.96);
}

.input-error {
  border-color: var(--color-danger);
  box-shadow: 0 0 0 1px rgba(255, 75, 110, 0.45);
}

.field-helper {
  margin-top: var(--space-1);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.field-error {
  margin-top: var(--space-1);
  font-size: var(--font-size-xs);
  color: var(--color-danger);
}

/* ========================================================================
   Components - Card (used for decks, guides, news, etc.)
   ======================================================================== */
.card {
  position: relative;
  border-radius: var(--radius-xl);
  padding: var(--space-5);
  background: radial-gradient(circle at top left, rgba(143, 92, 255, 0.22), transparent 55%),
    radial-gradient(circle at bottom right, rgba(40, 209, 255, 0.18), transparent 55%),
    var(--color-bg-card);
  border: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  transition: transform var(--transition-normal),
    box-shadow var(--transition-normal),
    border-color var(--transition-normal),
    background-position var(--transition-slow);
  background-size: 200% 200%;
  background-position: 0% 50%;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 22px 45px rgba(0, 0, 0, 0.9), 0 0 26px rgba(143, 92, 255, 0.75);
  border-color: rgba(143, 92, 255, 0.7);
  background-position: 100% 50%;
}

.card-header {
  margin-bottom: var(--space-3);
}

.card-title {
  font-family: var(--font-display);
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-1);
}

.card-meta {
  font-size: var(--font-size-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.card-body {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* Card accent variants (e.g., success tips, danger warnings) */
.card-success {
  border-color: rgba(58, 214, 157, 0.75);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.7), 0 0 22px rgba(58, 214, 157, 0.85);
}

.card-warning {
  border-color: rgba(255, 204, 77, 0.7);
}

.card-danger {
  border-color: rgba(255, 75, 110, 0.7);
}

/* ========================================================================
   Components - Hero / Page heading helpers
   ======================================================================== */
.page-hero {
  padding-block: var(--space-16);
}

.page-eyebrow {
  font-size: var(--font-size-xs);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-accent-blue);
  margin-bottom: var(--space-2);
}

.page-title {
  font-family: var(--font-display);
  font-size: var(--font-size-4xl);
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-3);
}

.page-subtitle {
  max-width: 44rem;
  color: var(--color-text-muted);
  font-size: var(--font-size-md);
}

/* ========================================================================
   Decorative / Theme Utilities for SocialShuffle
   ======================================================================== */
/* Subtle card-grid background for strategy sections */
.bg-grid-faint {
  position: relative;
}

.bg-grid-faint::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(
      rgba(143, 92, 255, 0.07) 1px,
      transparent 1px
    ),
    linear-gradient(
      90deg,
      rgba(40, 209, 255, 0.07) 1px,
      transparent 1px
    );
  background-size: 40px 40px;
  opacity: 0.35;
  pointer-events: none;
  mix-blend-mode: screen;
}

/* Subtle vignette for immersive dark-fantasy look */
.vignette {
  position: relative;
}

.vignette::after {
  content: "";
  position: fixed;
  inset: -10vh;
  pointer-events: none;
  background: radial-gradient(circle at center, transparent 0, rgba(0, 0, 0, 0.3) 60%, rgba(0, 0, 0, 0.7) 100%);
  z-index: -1;
}

/* Neon separator used for section dividers */
.neon-divider {
  width: 72px;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent-blue));
  box-shadow: 0 0 18px rgba(143, 92, 255, 0.9);
  margin-block: var(--space-4);
}

/* Tag pill for game mode, class, rarity labels */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 0.1rem 0.55rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 255, 255, 0.14);
  font-size: var(--font-size-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  background: rgba(9, 9, 34, 0.95);
}

.tag-primary {
  border-color: rgba(143, 92, 255, 0.9);
  color: var(--color-primary-strong);
}

.tag-success {
  border-color: rgba(58, 214, 157, 0.9);
  color: var(--color-success);
}

.tag-danger {
  border-color: rgba(255, 75, 110, 0.9);
  color: var(--color-danger);
}

/* ========================================================================
   End base.css
   ======================================================================== */