/* ========================================================================
   Variables
   ======================================================================== */
:root {
  /* Color Palette - Shadow Fight 4: Arena */
  --color-bg: #050609;                 /* shadow black - main background */
  --color-bg-elevated: #111319;        /* elevated panels */
  --color-bg-soft: #181b24;

  --color-text: #f5f5f7;               /* main text */
  --color-text-muted: #9da2b0;         /* secondary text */
  --color-border-subtle: #2a2f3a;

  --color-primary: #1f88ff;            /* electric blue - primary action */
  --color-primary-soft: rgba(31, 136, 255, 0.16);
  --color-primary-strong: #46a0ff;

  --color-accent-crimson: #d8243c;     /* deep crimson - critical / rank highlights */
  --color-accent-orange: #ff6a2a;      /* fiery orange - emphasis */
  --color-accent-steel: #3b4354;       /* steel gray */
  --color-accent-silver: #c5cad8;      /* silver accents */

  --color-success: #28c76f;
  --color-warning: #ffb020;
  --color-danger: #ff4b5c;

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

  --font-size-xs: 0.75rem;   /* 12px */
  --font-size-sm: 0.875rem;  /* 14px */
  --font-size-base: 1rem;    /* 16px */
  --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-height-tight: 1.1;
  --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-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: 2px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 18px;
  --radius-pill: 999px;

  /* Shadows - cinematic, high contrast */
  --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.45);
  --shadow-strong: 0 18px 45px rgba(0, 0, 0, 0.7);
  --shadow-glow-primary: 0 0 24px rgba(31, 136, 255, 0.6);
  --shadow-glow-crimson: 0 0 24px rgba(216, 36, 60, 0.7);

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

  /* Layout */
  --container-max-width: 1200px;
  --container-padding-x: var(--space-4);
}

@media (min-width: 768px) {
  :root {
    --container-padding-x: var(--space-6);
  }
}

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

* {
  margin: 0;
}

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

body {
  min-height: 100vh;
}

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

img {
  height: auto;
}

picture {
  display: block;
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
  border-radius: 0;
}

button {
  border: none;
  background: none;
  padding: 0;
}

ul,
ol {
  padding-left: 1.5rem;
}

blockquote,
figure {
  margin: 0;
}

table {
  border-collapse: collapse;
  border-spacing: 0;
}

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

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

/* ========================================================================
   Base Styles
   ======================================================================== */
body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  background-color: var(--color-bg);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

main {
  display: block;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--color-text);
}

h1 {
  font-size: var(--font-size-5xl);
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-4);
}

h2 {
  font-size: var(--font-size-3xl);
  line-height: var(--line-height-snug);
  margin-bottom: var(--space-3);
}

h3 {
  font-size: var(--font-size-2xl);
  line-height: var(--line-height-snug);
  margin-bottom: var(--space-2);
}

h4 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-2);
}

h5 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-1);
}

h6 {
  font-size: var(--font-size-sm);
  letter-spacing: 0.08em;
  margin-bottom: var(--space-1);
}

p {
  margin-bottom: var(--space-3);
  color: var(--color-text-muted);
}

strong,
b {
  font-weight: 600;
}

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

a:hover {
  color: var(--color-accent-orange);
  text-shadow: 0 0 8px rgba(255, 106, 42, 0.6);
}

a:active {
  color: var(--color-accent-crimson);
}

hr {
  border: 0;
  border-top: 1px solid var(--color-border-subtle);
  margin: var(--space-6) 0;
}

::selection {
  background-color: rgba(31, 136, 255, 0.32);
  color: #ffffff;
}

/* ========================================================================
   Accessibility
   ======================================================================== */
:focus-visible {
  outline: 2px solid var(--color-accent-crimson);
  outline-offset: 3px;
}

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

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

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

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

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

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

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

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

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

.grid {
  display: grid;
}

.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: 768px) {
  .grid-2,
  .grid-3 {
    grid-template-columns: minmax(0, 1fr);
  }
}

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

.text-right {
  text-align: right;
}

.m-auto {
  margin: auto;
}

.mt-4 {
  margin-top: var(--space-4);
}

.mb-4 {
  margin-bottom: var(--space-4);
}

.mb-6 {
  margin-bottom: var(--space-6);
}

.pt-6 {
  padding-top: var(--space-6);
}

.pb-6 {
  padding-bottom: var(--space-6);
}

.w-full {
  width: 100%;
}

.max-w-full {
  max-width: 100%;
}

/* Hero section base - cinematic top section */
.hero-section {
  position: relative;
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-12) 0;
  color: var(--color-text);
  background: radial-gradient(circle at top, rgba(31, 136, 255, 0.3), transparent 55%),
    radial-gradient(circle at bottom, rgba(216, 36, 60, 0.35), transparent 60%),
    linear-gradient(135deg, #050609 0%, #090b12 40%, #050609 100%);
  overflow: hidden;
}

.hero-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 10% 0%, rgba(255, 106, 42, 0.18), transparent 55%);
  opacity: 0.7;
  pointer-events: none;
}

.hero-section-content {
  position: relative;
  z-index: 1;
}

/* Subtle gradient border utility for cards / panels */
.border-gradient {
  position: relative;
}

.border-gradient::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  background: linear-gradient(135deg, rgba(31, 136, 255, 0.9), rgba(216, 36, 60, 0.9));
  opacity: 0.8;
  z-index: -1;
}

/* ========================================================================
   Components
   ======================================================================== */
/* Buttons - primary CTAs, filters for heroes, etc. */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.4rem;
  border-radius: var(--radius-pill);
  font-family: var(--font-display);
  font-size: var(--font-size-sm);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border: 1px solid transparent;
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
  transition: background-color var(--transition-normal),
    color var(--transition-fast),
    box-shadow var(--transition-normal),
    transform var(--transition-fast),
    border-color var(--transition-fast);
}

.btn-primary {
  background: radial-gradient(circle at 0% 0%, rgba(255, 106, 42, 0.4), transparent 55%),
    linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent-crimson) 100%);
  color: #ffffff;
  box-shadow: var(--shadow-strong), var(--shadow-glow-primary);
}

.btn-primary:hover {
  transform: translateY(-1px) scale(1.02);
  box-shadow: var(--shadow-strong), var(--shadow-glow-crimson);
  border-color: rgba(197, 202, 216, 0.8);
}

.btn-primary:active {
  transform: translateY(0) scale(0.98);
  box-shadow: var(--shadow-soft);
}

.btn-ghost {
  background-color: rgba(24, 27, 36, 0.85);
  color: var(--color-accent-silver);
  border-color: var(--color-border-subtle);
}

.btn-ghost:hover {
  background-color: rgba(59, 67, 84, 0.9);
  color: #ffffff;
}

.btn-danger {
  background: linear-gradient(135deg, var(--color-accent-crimson), var(--color-danger));
  color: #ffffff;
}

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.55;
  cursor: not-allowed;
  box-shadow: none;
}

/* Inputs - search heroes, filter tier lists, form fields */
.input,
select,
textarea {
  width: 100%;
  padding: 0.6rem 0.9rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-subtle);
  background-color: var(--color-bg-soft);
  color: var(--color-text);
  outline: none;
  transition: border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    background-color var(--transition-fast);
}

.input::placeholder,
textarea::placeholder {
  color: var(--color-text-muted);
}

.input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  border-color: var(--color-primary-strong);
  box-shadow: 0 0 0 1px rgba(31, 136, 255, 0.7);
}

.input[disabled],
select[disabled],
textarea[disabled] {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Card - hero panels, matchup cards, guides */
.card {
  position: relative;
  background: radial-gradient(circle at top left, rgba(31, 136, 255, 0.16), transparent 55%),
    radial-gradient(circle at bottom right, rgba(216, 36, 60, 0.18), transparent 55%),
    linear-gradient(145deg, #101218, #050609);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  border: 1px solid rgba(59, 67, 84, 0.85);
  box-shadow: var(--shadow-soft);
  color: var(--color-text);
  overflow: hidden;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-3);
}

.card-title {
  font-size: var(--font-size-lg);
  font-family: var(--font-display);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

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

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

/* Tag / pill for hero roles, factions, etc. */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-pill);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 1px solid rgba(197, 202, 216, 0.4);
  background-color: rgba(15, 17, 24, 0.85);
  color: var(--color-accent-silver);
}

.badge-tier-s {
  border-color: var(--color-accent-crimson);
  color: #ffffff;
  box-shadow: var(--shadow-glow-crimson);
}

.badge-tier-a {
  border-color: var(--color-primary-strong);
  color: var(--color-accent-silver);
}

/* Minimal table styling for matchup charts / tier lists */
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
}

.table th,
.table td {
  padding: 0.6rem 0.8rem;
  border-bottom: 1px solid var(--color-border-subtle);
}

.table thead th {
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.75rem;
  color: var(--color-accent-silver);
  background-color: rgba(10, 12, 18, 0.95);
}

.table tbody tr:nth-child(even) {
  background-color: rgba(15, 17, 24, 0.75);
}

.table tbody tr:hover {
  background-color: rgba(31, 136, 255, 0.08);
}

/* Tabs / segmented controls for builds, matchups, etc. */
.tabs {
  display: inline-flex;
  padding: 0.25rem;
  border-radius: var(--radius-pill);
  background-color: rgba(10, 12, 18, 0.9);
  border: 1px solid var(--color-border-subtle);
}

.tab-item {
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-pill);
  font-size: var(--font-size-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: background-color var(--transition-fast),
    color var(--transition-fast);
}

.tab-item.is-active {
  background: linear-gradient(135deg, rgba(31, 136, 255, 0.9), rgba(216, 36, 60, 0.9));
  color: #ffffff;
}

/* Pills for talent trees */
.skill-node {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 999px;
  border: 1px solid rgba(197, 202, 216, 0.7);
  background: radial-gradient(circle at 30% 0%, rgba(31, 136, 255, 0.35), transparent 60%),
    #050609;
  box-shadow: 0 0 0 1px rgba(5, 6, 9, 0.9), 0 0 15px rgba(31, 136, 255, 0.35);
  font-size: 0.75rem;
  color: var(--color-accent-silver);
}

.skill-node--active {
  border-color: var(--color-accent-orange);
  box-shadow: var(--shadow-glow-crimson);
  color: #ffffff;
}

/* Progress bar - for hero difficulty, power level, etc. */
.progress {
  position: relative;
  width: 100%;
  height: 0.45rem;
  border-radius: var(--radius-pill);
  background-color: #111319;
  overflow: hidden;
}

.progress-bar {
  position: absolute;
  inset: 0;
  width: 50%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent-crimson));
}

/* Toast-like status messages */
.alert {
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  border: 1px solid transparent;
}

.alert-success {
  background-color: rgba(40, 199, 111, 0.08);
  border-color: rgba(40, 199, 111, 0.6);
  color: #d3f9e5;
}

.alert-warning {
  background-color: rgba(255, 176, 32, 0.1);
  border-color: rgba(255, 176, 32, 0.7);
  color: #ffe7b8;
}

.alert-danger {
  background-color: rgba(255, 75, 92, 0.08);
  border-color: rgba(255, 75, 92, 0.7);
  color: #ffd5da;
}

/* Footer base */
.site-footer {
  border-top: 1px solid var(--color-border-subtle);
  background: linear-gradient(to top, #050609, #090b12);
  color: var(--color-text-muted);
  padding: var(--space-6) 0;
  font-size: var(--font-size-sm);
}

.site-footer a {
  color: var(--color-accent-silver);
}

.site-footer a:hover {
  color: #ffffff;
}