:root {
  --color-obsidian: #0B0E14;
  --color-slate: #1A1F2E;
  --color-slate-light: #242B3B;
  --color-crimson: #A61B29;
  --color-ember: #E8890C;
  --color-runic-cyan: #4DD0E1;
  --color-silver: #E8E8E8;
  --color-silver-muted: #A0AAB5;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-focus-ring: #4DD0E1;

  --font-heading: "Cinzel", serif;
  --font-body: "Source Sans 3", sans-serif;

  --text-display: clamp(2.5rem, 5vw, 3rem);
  --text-h1: clamp(2rem, 4vw, 2.25rem);
  --text-h2: clamp(1.625rem, 3vw, 1.875rem);
  --text-h3: clamp(1.375rem, 2vw, 1.5rem);
  --text-body: 1rem;
  --text-small: 0.875rem;

  --leading-heading: 1.2;
  --leading-body: 1.6;

  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  --container-max: 1200px;
  --container-padding-mobile: 16px;
  --container-padding-desktop: 32px;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  --shadow-modal: 0 8px 24px rgba(0, 0, 0, 0.4);

  --transition-fast: 0.2s ease-in-out;
}

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

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

body {
  min-height: 100vh;
  background-color: var(--color-obsidian);
  color: var(--color-silver);
  font-family: var(--font-body);
  font-size: var(--text-body);
  line-height: var(--leading-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

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

button {
  background: none;
  border: none;
  cursor: pointer;
  min-height: 44px;
  min-width: 44px;
}

a {
  color: var(--color-runic-cyan);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 2px;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: var(--leading-heading);
  letter-spacing: 0.05em;
  color: var(--color-silver);
  margin-block-end: var(--space-md);
}

h1 {
  font-size: var(--text-h1);
}

h2 {
  font-size: var(--text-h2);
}

h3 {
  font-size: var(--text-h3);
}

p {
  margin-block-end: var(--space-md);
}

ul,
ol {
  margin-block-end: var(--space-md);
  padding-inline-start: var(--space-lg);
}

ul:last-child,
ol:last-child,
p:last-child,
h1:last-child,
h2:last-child,
h3:last-child,
h4:last-child,
h5:last-child,
h6:last-child,
blockquote:last-child {
  margin-block-end: 0;
}

blockquote {
  margin-block-end: var(--space-md);
  padding-inline-start: var(--space-lg);
  border-inline-start: 3px solid var(--color-crimson);
  color: var(--color-silver-muted);
}

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

.surface {
  background-color: var(--color-slate);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.surface-elevated {
  background-color: var(--color-slate-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.card {
  background-color: var(--color-slate);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.card > :last-child {
  margin-block-end: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  min-height: 44px;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: var(--text-small);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.btn-primary {
  background-color: var(--color-crimson);
  color: var(--color-silver);
  border: 1px solid var(--color-crimson);
}

.btn-primary:hover {
  background-color: #8a1622;
  border-color: #8a1622;
  color: var(--color-silver);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-runic-cyan);
  border: 1px solid var(--color-runic-cyan);
}

.btn-secondary:hover {
  background-color: rgba(77, 208, 225, 0.1);
  color: var(--color-runic-cyan);
}

.form-label {
  display: block;
  margin-block-end: var(--space-xs);
  font-size: var(--text-small);
  font-weight: 600;
  color: var(--color-silver);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  background-color: var(--color-slate);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-silver);
  font-family: var(--font-body);
  font-size: var(--text-body);
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--color-runic-cyan);
  background-color: var(--color-slate-light);
  outline: none;
}

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

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.flex-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.flex-row > * {
  min-width: 0;
}

.flex-col {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.flex-col > * {
  min-width: 0;
}

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