/* ========================================================================== 
   Variables
   ========================================================================== */

:root {
  /* Colors - 19th century, dark, elegant palette */
  --color-bg: #050609; /* near-black with a cool tint */
  --color-bg-elevated: #0f1116; /* slightly lighter for panels/cards */
  --color-bg-muted: #151923;

  --color-text: #f0e7d8; /* warm parchment-like text */
  --color-text-muted: #b7a894;
  --color-text-soft: #8c816f;

  --color-primary: #c49a3a; /* antique gold */
  --color-primary-soft: rgba(196, 154, 58, 0.14);
  --color-primary-strong: #e5b84b;

  --color-success: #63b377; /* muted green */
  --color-warning: #e0a04c;
  --color-danger: #c74343;

  /* Neutral grays in a dark theme context */
  --gray-900: #050609;
  --gray-800: #0f1116;
  --gray-700: #191d27;
  --gray-600: #252a36;
  --gray-500: #3d4352;
  --gray-400: #6d7484;
  --gray-300: #9ca3b2;
  --gray-200: #c5cad5;
  --gray-100: #e1e4ec;
  --gray-50: #f5f6fa;

  /* Typography */
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-serif: "Playfair Display", "Libre Baskerville", "Times New Roman", serif;
  --font-mono: "SF Mono", ui-monospace, Menlo, Monaco, Consolas, "Liberation Mono", monospace;

  --font-body: var(--font-sans);
  --font-heading: var(--font-serif);

  --font-size-xs: 0.75rem;    /* 12px */
  --font-size-sm: 0.875rem;   /* 14px */
  --font-size-md: 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: 1.2;
  --line-height-snug: 1.35;
  --line-height-normal: 1.6;
  --line-height-relaxed: 1.8;

  /* Spacing scale (0–96px) */
  --space-0: 0;
  --space-1: 0.125rem; /* 2px */
  --space-2: 0.25rem;  /* 4px */
  --space-3: 0.375rem; /* 6px */
  --space-4: 0.5rem;   /* 8px */
  --space-5: 0.75rem;  /* 12px */
  --space-6: 1rem;     /* 16px */
  --space-8: 1.5rem;   /* 24px */
  --space-10: 2rem;    /* 32px */
  --space-12: 3rem;    /* 48px */
  --space-16: 4rem;    /* 64px */
  --space-20: 5rem;    /* 80px */
  --space-24: 6rem;    /* 96px */

  /* Radius */
  --radius-none: 0;
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-pill: 999px;

  /* Shadows – subtle and atmospheric */
  --shadow-soft: 0 14px 35px rgba(0, 0, 0, 0.45);
  --shadow-soft-sm: 0 8px 20px rgba(0, 0, 0, 0.4);
  --shadow-inset: inset 0 0 0 1px rgba(255, 255, 255, 0.02);

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

  /* Layout helpers */
  --layout-max-width: 1120px;
  --layout-gutter: var(--space-6);

  /* Focus outline */
  --focus-outline-color: rgba(229, 184, 75, 0.9);
  --focus-outline-offset: 3px;
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  :root {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ========================================================================== 
   Reset / Normalize
   ========================================================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 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,
svg,
video,
canvas {
  height: auto;
}

picture {
  display: block;
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
  margin: 0;
}

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

ul,
ol {
  margin: 0;
  padding: 0;
}

h1,
 h2,
 h3,
 h4,
 h5,
 h6,
 p,
 figure,
 blockquote,
 dl,
 dd {
  margin: 0;
}

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

textarea {
  resize: vertical;
}

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

[hidden] {
  display: none !important;
}

/* ========================================================================== 
   Base Styles
   ========================================================================== */

body {
  font-family: var(--font-body);
  font-size: var(--font-size-md);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background: radial-gradient(circle at top, #13182a 0, transparent 55%),
              radial-gradient(circle at bottom, #1c110f 0, transparent 50%),
              var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main {
  min-height: 60vh;
}

/* Headings – serif, dramatic, suitable for 19th-century ambience */

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

h1 {
  font-size: clamp(2.5rem, 3vw + 1.6rem, 3.5rem);
  margin-bottom: var(--space-6);
}

h2 {
  font-size: clamp(1.875rem, 2.2vw + 1rem, 2.5rem);
  margin-bottom: var(--space-5);
}

h3 {
  font-size: clamp(1.5rem, 1.5vw + 1rem, 2rem);
  margin-bottom: var(--space-4);
}

h4 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-4);
}

h5 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-3);
}

h6 {
  font-size: var(--font-size-md);
  margin-bottom: var(--space-2);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

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

strong,
 b {
  font-weight: 600;
}

small {
  font-size: var(--font-size-sm);
}

/* Links – subtle, gold highlights */

a {
  color: var(--color-primary-strong);
  text-decoration: none;
  position: relative;
  transition: color var(--transition-base);
}

a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.1em;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent 0, rgba(196, 154, 58, 0.8) 40%, rgba(196, 154, 58, 0.8) 60%, transparent 100%);
  opacity: 0;
  transform: scaleX(0.85);
  transform-origin: center;
  transition: opacity var(--transition-base), transform var(--transition-base);
}

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

a:hover::after {
  opacity: 1;
  transform: scaleX(1);
}

a:visited {
  color: #ffff;
}

/* Code */

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

pre {
  margin: var(--space-6) 0;
  padding: var(--space-5);
  font-size: var(--font-size-sm);
  background-color: var(--gray-800);
  color: var(--gray-100);
  border-radius: var(--radius-md);
  overflow-x: auto;
}

/* Lists */

ul,
 ol {
  padding-left: 1.25rem;
  margin-bottom: var(--space-4);
}

li + li {
  margin-top: var(--space-1);
}

/* Blockquotes */

blockquote {
  margin: var(--space-6) 0;
  padding-left: var(--space-5);
  border-left: 2px solid rgba(196, 154, 58, 0.6);
  color: var(--color-text-soft);
  font-style: italic;
}

/* ========================================================================== 
   Accessibility & Focus
   ========================================================================== */

:focus {
  outline: none;
}

:focus-visible {
  outline: 2px solid var(--focus-outline-color);
  outline-offset: var(--focus-outline-offset);
}

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

/* ========================================================================== 
   Layout Utilities
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--layout-max-width);
  margin-inline: auto;
  padding-inline: var(--layout-gutter);
}

.section {
  padding-block: clamp(3rem, 8vh, 5rem);
}

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

/* Flex utilities */

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

/* Grid utilities */

.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);
  }
}

/* Simple spacing utilities (vertical rhythm) */

.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); }

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

/* ========================================================================== 
   Components
   ========================================================================== */

/* Buttons – immersive, gold accent, subtle glow */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.55rem 1.4rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(196, 154, 58, 0.55);
  background: radial-gradient(circle at 0 0, rgba(255, 255, 255, 0.06) 0, transparent 45%),
              linear-gradient(to right, #2a1c10, #121725);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: border-color var(--transition-base),
              background-position var(--transition-slow),
              box-shadow var(--transition-base),
              transform var(--transition-fast),
              color var(--transition-base);
}

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

.btn:hover {
  border-color: var(--color-primary-strong);
  box-shadow: var(--shadow-soft-sm);
  transform: translateY(-1px);
}

.btn:hover::before {
  opacity: 1;
}

.btn:active {
  transform: translateY(0);
  box-shadow: none;
}

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

.btn-primary {
  background: linear-gradient(135deg, #b18630, #e5b84b);
  color: #1a1308;
  border-color: transparent;
}

.btn-primary:hover {
  background: linear-gradient(135deg, #c69637, #f0c861);
   color: #1a1308;
}

.btn-ghost {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.18);
  color: var(--color-text);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.02);
}

/* Inputs – for forms, search, puzzle answers */

.input,
 select,
 textarea {
  width: 100%;
  padding: 0.6rem 0.8rem;
  font-size: var(--font-size-md);
  color: var(--color-text);
  background-color: rgba(9, 11, 18, 0.96);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow-inset);
  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 {
  border-color: rgba(229, 184, 75, 0.9);
  box-shadow: 0 0 0 1px rgba(229, 184, 75, 0.7);
}

.input[aria-invalid="true"],
 input:invalid {
  border-color: rgba(199, 67, 67, 0.85);
}

label {
  display: inline-block;
  margin-bottom: var(--space-2);
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-soft);
}

.form-field {
  margin-bottom: var(--space-5);
}

/* Card – for puzzle rooms, story snippets, features */

.card {
  position: relative;
  padding: var(--space-6);
  border-radius: var(--radius-lg);
  background: linear-gradient(145deg, #0f1116, #18131a);
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(255, 255, 255, 0.05);
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 0 0, rgba(196, 154, 58, 0.1), transparent 55%),
    radial-gradient(circle at 100% 100%, rgba(14, 41, 86, 0.24), transparent 55%);
  mix-blend-mode: screen;
  opacity: 0.9;
}

.card-inner {
  position: relative;
  z-index: 1;
}

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

.card-title {
  font-family: var(--font-heading);
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-2);
}

.card-meta {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--color-text-soft);
}

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

.card-subtle {
  background: linear-gradient(140deg, #111319, #151923);
  box-shadow: var(--shadow-soft-sm);
  border-color: rgba(255, 255, 255, 0.03);
}

/* Navigation helpers – optional base styles */

.navbar {
  position: relative;
  z-index: 10;
  backdrop-filter: blur(18px);
  background: linear-gradient(to bottom, rgba(5, 6, 9, 0.9), rgba(5, 6, 9, 0.4));
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  padding-block: 0.75rem;
}

.navbar-brand {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  font-family: var(--font-heading);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-size: var(--font-size-sm);
}

.navbar-brand span:first-child {
  font-weight: 700;
  color: var(--color-primary-strong);
}

.navbar-nav {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  list-style: none;
}

.nav-link {
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--color-text-soft);
  position: relative;
  padding-block: 0.25rem;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1px;
  background: var(--color-primary-strong);
  transition: width var(--transition-base);
}

.nav-link:hover,
.nav-link[aria-current="page"] {
  color: var(--color-text);
}

.nav-link:hover::after,
.nav-link[aria-current="page"]::after {
  width: 100%;
}

/* Hero / atmospheric background helpers */

.hero {
  position: relative;
  padding-block: clamp(4rem, 12vh, 7rem);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 10% 0, rgba(196, 154, 58, 0.16), transparent 55%),
    radial-gradient(circle at 90% 100%, rgba(21, 45, 92, 0.32), transparent 60%);
  mix-blend-mode: screen;
  opacity: 0.9;
  pointer-events: none;
}

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

/* Tag / pill – for difficulty levels, room type etc. */

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.18rem 0.6rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(9, 11, 18, 0.9);
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--color-text-soft);
}

.badge--gold {
  border-color: rgba(196, 154, 58, 0.85);
  color: var(--color-primary-strong);
}

.badge--danger {
  border-color: rgba(199, 67, 67, 0.85);
  color: var(--color-danger);
}

/* Overlay / dimmer – for interactive modals or puzzle previews */

.backdrop {
  position: fixed;
  inset: 0;
  background: radial-gradient(circle at top, rgba(7, 10, 20, 0.96) 0, rgba(7, 6, 9, 0.98) 55%);
  backdrop-filter: blur(16px);
  z-index: 40;
}

.backdrop[data-state="hidden"] {
  display: none;
}