/* ==========================================================================
   Variables
   ========================================================================== */
:root {
  /* Colors */
  --color-bg: #050816;
  --color-bg-elevated: #0b1020;
  --color-bg-soft: #111827;
  --color-surface: #111827;
  --color-surface-alt: #1f2937;

  --color-text: #e5e7eb;
  --color-text-muted: #9ca3af;
  --color-text-soft: #6b7280;

  --color-primary: #6366f1; /* indigo */
  --color-primary-soft: rgba(99, 102, 241, 0.12);
  --color-primary-strong: #4f46e5;

  --color-success: #22c55e;
  --color-success-soft: rgba(34, 197, 94, 0.12);

  --color-warning: #facc15;
  --color-warning-soft: rgba(250, 204, 21, 0.16);

  --color-danger: #ef4444;
  --color-danger-soft: rgba(239, 68, 68, 0.16);

  --color-border-subtle: #1f2937;
  --color-border-strong: #374151;

  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;

  /* Gamified / status colors */
  --color-xp: #22c55e;
  --color-level: #0ea5e9;
  --color-achievement: #fbbf24;

  /* Typography */
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji",
    "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
  --font-display: "Poppins", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", 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 / 0–6rem) */
  --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-14: 3.5rem;  /* 56px */
  --space-16: 4rem;    /* 64px */
  --space-20: 5rem;    /* 80px */
  --space-24: 6rem;    /* 96px */

  /* Radius */
  --radius-xs: 0.125rem;
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-soft: 0 10px 30px rgba(15, 23, 42, 0.35);
  --shadow-soft-sm: 0 6px 20px rgba(15, 23, 42, 0.3);
  --shadow-strong: 0 20px 50px rgba(0, 0, 0, 0.55);
  --shadow-focus: 0 0 0 2px rgba(15, 23, 42, 0.9),
    0 0 0 4px rgba(129, 140, 248, 0.9);

  /* Transitions */
  --transition-fast: 120ms ease-out;
  --transition-base: 180ms ease-out;
  --transition-slow: 260ms ease-out;

  /* Layout */
  --container-max-width: 1120px;
  --nav-height: 4.5rem;
}

@media (min-width: 1024px) {
  :root {
    --font-size-3xl: 2.25rem; /* 36px */
    --font-size-4xl: 3rem;    /* 48px */
    --font-size-5xl: 3.75rem; /* 60px */
  }
}


/* ==========================================================================
   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,
video {
  height: auto;
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

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

ul,
ol {
  padding-left: 1.25rem;
}

blockquote,
figure {
  margin: 0;
}

fieldset {
  border: 0;
  margin: 0;
  padding: 0;
}

legend {
  padding: 0;
}

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

textarea {
  resize: vertical;
}

[hidden] {
  display: none !important;
}


/* ==========================================================================
   Base
   ========================================================================== */
body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
  background: radial-gradient(circle at top, #111827 0, #020617 40%, #020617 100%);
  color: var(--color-text);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

main {
  min-height: calc(100vh - var(--nav-height));
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: var(--line-height-tight);
  color: var(--color-gray-50);
  letter-spacing: 0.02em;
}

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

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

h3 {
  font-size: var(--font-size-2xl);
  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-base);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-1);
}

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

p:last-child {
  margin-bottom: 0;
}

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

a:hover {
  color: var(--color-primary-strong);
}

strong,
b {
  font-weight: 600;
}

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

pre {
  padding: var(--space-3);
  background-color: rgba(15, 23, 42, 0.9);
  border-radius: var(--radius-md);
  overflow-x: auto;
}

hr {
  border: none;
  border-top: 1px solid var(--color-border-subtle);
  margin: var(--space-6) 0;
}


/* ==========================================================================
   Accessibility & Motion
   ========================================================================== */
:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
  border-radius: var(--radius-md);
}

:focus:not(:focus-visible) {
  outline: none;
}

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


/* ==========================================================================
   Utilities
   ========================================================================== */
/* Layout: container */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

@media (min-width: 1024px) {
  .container {
    padding-left: var(--space-6);
    padding-right: var(--space-6);
  }
}

/* Section spacing */
.section {
  padding-top: var(--space-14);
  padding-bottom: var(--space-14);
}

.section--tight {
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
}

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

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

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

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

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

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

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

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

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

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

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

.grid-2 {
  display: grid;
  grid-template-columns: repeat(1, minmax(0, 1fr));
  gap: var(--space-4);
}

@media (min-width: 768px) {
  .grid-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(1, minmax(0, 1fr));
  gap: var(--space-4);
}

@media (min-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* Alignment & text */
.text-center {
  text-align: center;
}

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

.text-muted {
  color: var(--color-text-muted);
}

.text-soft {
  color: var(--color-text-soft);
}

/* Badges / labels for gamified UI */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.125rem 0.5rem;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 600;
}

.badge--primary {
  background: var(--color-primary-soft);
  color: var(--color-primary);
}

.badge--success {
  background: var(--color-success-soft);
  color: var(--color-success);
}

.badge--warning {
  background: var(--color-warning-soft);
  color: var(--color-warning);
}

.badge--danger {
  background: var(--color-danger-soft);
  color: var(--color-danger);
}

/* XP / Progress text helpers */
.text-xp {
  color: var(--color-xp);
}

.text-level {
  color: var(--color-level);
}

.text-achievement {
  color: var(--color-achievement);
}

/* 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;
}


/* ==========================================================================
   Components
   ========================================================================== */
/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.7rem 1.4rem;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  font-weight: 600;
  font-size: var(--font-size-sm);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-gray-50);
  background: radial-gradient(circle at 0 0, rgba(148, 163, 184, 0.25) 0, transparent 45%),
    linear-gradient(135deg, var(--color-primary-strong), #22c55e);
  box-shadow: var(--shadow-soft-sm);
  transition: transform var(--transition-fast),
    box-shadow var(--transition-fast),
    background var(--transition-base),
    opacity var(--transition-fast);
}

.btn:hover {
  transform: translateY(-1px) scale(1.01);
  box-shadow: var(--shadow-strong);
}

.btn:active {
  transform: translateY(0) scale(0.99);
  box-shadow: var(--shadow-soft-sm);
}

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.6;
  cursor: not-allowed;
  box-shadow: none;
}

.btn--ghost {
  background: rgba(15, 23, 42, 0.7);
  border-color: var(--color-border-strong);
  color: var(--color-text);
  box-shadow: none;
}

.btn--ghost:hover {
  background: rgba(31, 41, 55, 0.9);
}

.btn--outline {
  background: transparent;
  border-color: rgba(148, 163, 184, 0.6);
  color: var(--color-gray-50);
}

.btn--outline:hover {
  background: rgba(15, 23, 42, 0.9);
}

.btn--sm {
  padding: 0.5rem 1rem;
  font-size: var(--font-size-xs);
}

.btn--lg {
  padding: 0.9rem 1.8rem;
  font-size: var(--font-size-base);
}

/* Inputs & form controls */
.input,
select,
textarea {
  width: 100%;
  padding: 0.7rem 0.9rem;
  border-radius: var(--radius-md);
  border: 1px solid rgba(55, 65, 81, 0.9);
  background-color: rgba(15, 23, 42, 0.9);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-normal);
  transition: border-color var(--transition-base),
    box-shadow var(--transition-base),
    background-color var(--transition-base);
}

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

.input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px rgba(148, 163, 184, 0.6),
    0 0 0 3px rgba(99, 102, 241, 0.8);
}

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

label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

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

.form-help {
  margin-top: 0.3rem;
  font-size: var(--font-size-xs);
  color: var(--color-text-soft);
}

.form-error {
  margin-top: 0.3rem;
  font-size: var(--font-size-xs);
  color: var(--color-danger);
}

/* Card component – core building block for game levels, tips, etc. */
.card {
  position: relative;
  background: radial-gradient(circle at top left, rgba(129, 140, 248, 0.18) 0, transparent 40%),
    radial-gradient(circle at bottom right, rgba(56, 189, 248, 0.16) 0, transparent 45%),
    rgba(15, 23, 42, 0.96);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(55, 65, 81, 0.9);
  padding: var(--space-5);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(148, 163, 184, 0.08), transparent 40%);
  mix-blend-mode: soft-light;
  opacity: 0.8;
  pointer-events: none;
}

.card > * {
  position: relative;
}

.card--soft {
  background: rgba(15, 23, 42, 0.9);
  box-shadow: var(--shadow-soft-sm);
}

.card--outlined {
  background: rgba(15, 23, 42, 0.85);
  border-style: dashed;
}

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

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

.card-meta {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-soft);
}

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

/* Progress bar – useful for levels & progression */
.progress {
  width: 100%;
  height: 0.6rem;
  background: rgba(15, 23, 42, 0.9);
  border-radius: var(--radius-full);
  overflow: hidden;
  border: 1px solid rgba(55, 65, 81, 0.9);
}

.progress__bar {
  height: 100%;
  background: linear-gradient(90deg, #22c55e, #a3e635);
  border-radius: inherit;
  transition: width var(--transition-slow);
}

/* Tabs – for sections like Features, Levels, FAQ categories */
.tabs {
  display: flex;
  gap: var(--space-2);
  padding: 0.3rem;
  border-radius: var(--radius-full);
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(55, 65, 81, 0.9);
}

.tab {
  flex: 1;
  text-align: center;
  padding: 0.45rem 0.8rem;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
  color: var(--color-text-soft);
  transition: background var(--transition-base), color var(--transition-base);
}

.tab--active {
  background: radial-gradient(circle at top, rgba(129, 140, 248, 0.4) 0, transparent 55%);
  color: var(--color-gray-50);
}

/* Tag list for blog / tips */
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.tag {
  padding: 0.1rem 0.55rem;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  background: rgba(55, 65, 81, 0.9);
  color: var(--color-gray-100);
}

/* Navigation shell – generic base styling for top nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(20px);
  background: linear-gradient(to bottom, rgba(2, 6, 23, 0.98), rgba(2, 6, 23, 0.85));
  border-bottom: 1px solid rgba(15, 23, 42, 0.9);
}

.site-nav {
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.site-nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.site-nav__link {
  font-size: var(--font-size-sm);
  color: var(--color-text-soft);
  padding-bottom: 0.15rem;
  border-bottom: 2px solid transparent;
  transition: color var(--transition-base), border-color var(--transition-base);
}

.site-nav__link:hover {
  color: var(--color-gray-50);
}

.site-nav__link--active {
  color: var(--color-gray-50);
  border-color: var(--color-primary);
}

/* Hero shell – for Game Overview / landing sections */
.hero {
  padding-top: calc(var(--space-16) + var(--nav-height));
  padding-bottom: var(--space-16);
}

.hero__eyebrow {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--color-text-soft);
  margin-bottom: var(--space-2);
}

.hero__headline {
  font-size: clamp(2.5rem, 3vw + 1.5rem, 3.5rem);
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-4);
}

.hero__subcopy {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  max-width: 36rem;
}

.hero__actions {
  margin-top: var(--space-5);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* FAQ base styles */
.faq-item {
  border-radius: var(--radius-lg);
  border: 1px solid rgba(31, 41, 55, 0.95);
  background: rgba(15, 23, 42, 0.95);
  padding: var(--space-4);
}

.faq-item + .faq-item {
  margin-top: var(--space-3);
}

.faq-question {
  font-size: var(--font-size-base);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.faq-answer {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* Blog article meta */
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  font-size: var(--font-size-xs);
  color: var(--color-text-soft);
}

.article-meta__item {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

/* Status pills for content difficulty / level */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(55, 65, 81, 0.9);
  color: var(--color-text-soft);
}

.pill--beginner {
  border-color: rgba(34, 197, 94, 0.8);
  color: var(--color-success);
}

.pill--intermediate {
  border-color: rgba(14, 165, 233, 0.8);
  color: var(--color-level);
}

.pill--advanced {
  border-color: rgba(239, 68, 68, 0.8);
  color: var(--color-danger);
}

/* Callout boxes for tips & strategies */
.callout {
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  border: 1px solid rgba(55, 65, 81, 0.9);
  background: rgba(15, 23, 42, 0.9);
}

.callout--pro-tip {
  border-color: rgba(56, 189, 248, 0.9);
  background: radial-gradient(circle at top left, rgba(56, 189, 248, 0.28) 0, transparent 50%),
    rgba(15, 23, 42, 0.95);
}

.callout--warning {
  border-color: rgba(250, 204, 21, 0.9);
  background: radial-gradient(circle at top left, rgba(250, 204, 21, 0.32) 0, transparent 50%),
    rgba(15, 23, 42, 0.95);
}

.callout-title {
  font-weight: 600;
  margin-bottom: var(--space-1);
}

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

/* Footer base styling */
.site-footer {
  border-top: 1px solid rgba(15, 23, 42, 0.95);
  background: linear-gradient(to top, #020617, rgba(2, 6, 23, 0.96));
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
  font-size: var(--font-size-sm);
  color: var(--color-text-soft);
}

.site-footer a {
  color: var(--color-text-muted);
}

.site-footer a:hover {
  color: var(--color-gray-50);
}