@layer reset, base, primitives;

/* ---------- RESET ---------- */
@layer reset {
  *,
  *::before,
  *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }

  html {
    -webkit-text-size-adjust: 100%;
    -moz-tab-size: 4;
    tab-size: 4;
    scroll-behavior: auto;
  }

  body {
    min-height: 100vh;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
  }

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

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

  button {
    cursor: pointer;
    appearance: none;
  }

  ul,
  ol {
    list-style: none;
  }

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

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

  blockquote,
  q {
    quotes: none;
  }

  blockquote::before,
  blockquote::after,
  q::before,
  q::after {
    content: "";
    content: none;
  }

  hr {
    border: 0;
    border-top: 1px solid var(--color-aluminium);
  }

  address {
    font-style: normal;
  }

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

/* ---------- BASE ---------- */
@layer base {
  :root {
    /* Colors */
    --color-porcelain: #f4f1ec;
    --color-porcelain-raised: #fbf9f6;
    --color-graphite: #1c1e22;
    --color-graphite-soft: #4a4e55;
    --color-cobalt: #1f4fd8;
    --color-cobalt-deep: #163aa6;
    --color-orange: #d96b2b;
    --color-aluminium: #b8bcc2;
    --color-walnut: #3b2a20;
    --color-walnut-deep: #241811;

    /* Typography */
    --font-heading: "Space Grotesk", system-ui, sans-serif;
    --font-body: "Inter", system-ui, sans-serif;

    --text-display-size: clamp(2.5rem, 5.5vw + 1rem, 4.5rem);
    --text-display-line-height: 1.02;
    --text-display-letter-spacing: -0.03em;
    --text-display-weight: 700;

    --text-h1-size: clamp(2rem, 3.5vw + 0.75rem, 3.25rem);
    --text-h1-line-height: 1.06;
    --text-h1-letter-spacing: -0.02em;
    --text-h1-weight: 700;

    --text-h2-size: clamp(1.75rem, 2.5vw + 0.5rem, 2.25rem);
    --text-h2-line-height: 1.12;
    --text-h2-letter-spacing: -0.015em;
    --text-h2-weight: 500;

    --text-h3-size: clamp(1.375rem, 1.5vw + 0.375rem, 1.5rem);
    --text-h3-line-height: 1.2;
    --text-h3-letter-spacing: -0.01em;
    --text-h3-weight: 500;

    --text-h4-size: 1.125rem;
    --text-h4-line-height: 1.3;
    --text-h4-letter-spacing: 0em;
    --text-h4-weight: 500;

    --text-body-large-size: 1.125rem;
    --text-body-large-line-height: 1.6;
    --text-body-large-letter-spacing: 0em;
    --text-body-large-weight: 400;

    --text-body-size: 1rem;
    --text-body-line-height: 1.65;
    --text-body-letter-spacing: 0em;
    --text-body-weight: 400;

    --text-body-small-size: 0.875rem;
    --text-body-small-line-height: 1.55;
    --text-body-small-letter-spacing: 0.01em;
    --text-body-small-weight: 400;

    --text-label-size: 0.75rem;
    --text-label-line-height: 1.4;
    --text-label-letter-spacing: 0.1em;
    --text-label-weight: 500;

    --text-caption-size: 0.75rem;
    --text-caption-line-height: 1.5;
    --text-caption-letter-spacing: 0.02em;
    --text-caption-weight: 400;

    /* Spacing */
    --space-2xs: 0.25rem;
    --space-xs: 0.5rem;
    --space-sm: 0.75rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    --space-5xl: 8rem;

    /* Containers */
    --container-max: 77.5rem;
    --container-padding-mobile: 1.5rem;
    --container-padding-tablet: 2.5rem;
    --container-padding-desktop: 4rem;

    /* Surfaces */
    --surface-page: var(--color-porcelain);
    --surface-raised: var(--color-porcelain-raised);
    --surface-dark: var(--color-graphite);
    --surface-warm-dark: var(--color-walnut);
    --surface-warm-deep: var(--color-walnut-deep);

    /* Borders */
    --border-hairline: 1px solid var(--color-aluminium);
    --border-hairline-soft: 1px solid var(--color-graphite-soft);
    --border-focus: 2px solid var(--color-cobalt);
    --border-focus-dark: 2px solid var(--color-porcelain);

    /* Shadows */
    --shadow-modal: 0 8px 24px rgba(28, 30, 34, 0.12);

    /* Radius */
    --radius-none: 0px;
    --radius-sm: 2px;
    --radius-md: 4px;
    --radius-lg: 8px;

    /* Transitions */
    --transition-fast: 120ms ease;
    --transition-base: 200ms ease;

    /* Tabular figures for prices */
    --font-feature-tabular: "tnum" 1;
  }

  body {
    font-family: var(--font-body);
    font-size: var(--text-body-size);
    font-weight: var(--text-body-weight);
    line-height: var(--text-body-line-height);
    letter-spacing: var(--text-body-letter-spacing);
    color: var(--color-graphite);
    background-color: var(--surface-page);
    overflow-x: hidden;
  }

  h1,
  h2,
  h3,
  h4,
  h5,
  h6 {
    font-family: var(--font-heading);
    color: var(--color-graphite);
    text-wrap: balance;
  }

  h1 {
    font-size: var(--text-h1-size);
    line-height: var(--text-h1-line-height);
    letter-spacing: var(--text-h1-letter-spacing);
    font-weight: var(--text-h1-weight);
    margin-block-end: var(--space-lg);
  }

  h2 {
    font-size: var(--text-h2-size);
    line-height: var(--text-h2-line-height);
    letter-spacing: var(--text-h2-letter-spacing);
    font-weight: var(--text-h2-weight);
    margin-block-end: var(--space-lg);
  }

  h3 {
    font-size: var(--text-h3-size);
    line-height: var(--text-h3-line-height);
    letter-spacing: var(--text-h3-letter-spacing);
    font-weight: var(--text-h3-weight);
    margin-block-end: var(--space-md);
  }

  h4 {
    font-size: var(--text-h4-size);
    line-height: var(--text-h4-line-height);
    letter-spacing: var(--text-h4-letter-spacing);
    font-weight: var(--text-h4-weight);
    margin-block-end: var(--space-sm);
  }

  h5,
  h6 {
    font-size: var(--text-h4-size);
    line-height: var(--text-h4-line-height);
    letter-spacing: var(--text-h4-letter-spacing);
    font-weight: var(--text-h4-weight);
    margin-block-end: var(--space-sm);
  }

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

  p:last-child {
    margin-block-end: 0;
  }

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

  ul {
    list-style: disc;
  }

  ol {
    list-style: decimal;
  }

  ul:last-child,
  ol:last-child {
    margin-block-end: 0;
  }

  blockquote {
    margin-block-end: var(--space-md);
    padding-inline-start: var(--space-lg);
    border-inline-start: 2px solid var(--color-cobalt);
    color: var(--color-graphite-soft);
  }

  blockquote:last-child {
    margin-block-end: 0;
  }

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

  figure:last-child {
    margin-block-end: 0;
  }

  figcaption {
    font-size: var(--text-caption-size);
    line-height: var(--text-caption-line-height);
    letter-spacing: var(--text-caption-letter-spacing);
    color: var(--color-graphite-soft);
    margin-block-start: var(--space-xs);
  }

  a {
    color: var(--color-cobalt);
    transition: color var(--transition-fast);
  }

  a:hover {
    color: var(--color-cobalt-deep);
  }

  strong {
    font-weight: 500;
  }

  small {
    font-size: var(--text-body-small-size);
    line-height: var(--text-body-small-line-height);
    letter-spacing: var(--text-body-small-letter-spacing);
  }

  mark {
    background-color: var(--color-orange);
    color: var(--color-graphite);
    padding-inline: 0.125rem;
  }

  code,
  kbd,
  samp {
    font-family: ui-monospace, "SF Mono", "Cascadia Code", "Roboto Mono", monospace;
    font-size: 0.875em;
  }

  hr {
    margin-block: var(--space-lg);
  }

  /* Form defaults */
  label {
    font-size: var(--text-label-size);
    line-height: var(--text-label-line-height);
    letter-spacing: var(--text-label-letter-spacing);
    font-weight: var(--text-label-weight);
    text-transform: uppercase;
    color: var(--color-graphite);
    display: inline-block;
    margin-block-end: var(--space-xs);
  }

  input,
  textarea,
  select {
    width: 100%;
    font-family: var(--font-body);
    font-size: var(--text-body-size);
    line-height: var(--text-body-line-height);
    letter-spacing: var(--text-body-letter-spacing);
    color: var(--color-graphite);
    background-color: var(--surface-raised);
    border: 1px solid var(--color-graphite-soft);
    border-radius: var(--radius-sm);
    padding: var(--space-sm) var(--space-md);
    transition: border-color var(--transition-fast);
  }

  input::placeholder,
  textarea::placeholder {
    color: var(--color-graphite-soft);
    opacity: 0.7;
  }

  input:focus,
  textarea:focus,
  select:focus {
    border-color: var(--color-cobalt);
    outline: none;
  }

  textarea {
    resize: vertical;
    min-height: 8rem;
  }

  select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%234A4E55' stroke-width='1.5' fill='none' stroke-linecap='square'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--space-md) center;
    padding-inline-end: var(--space-2xl);
  }

  /* Media defaults */
  video {
    width: 100%;
    height: auto;
  }

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

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

  @media (min-width: 1024px) {
    .container {
      padding-inline: var(--container-padding-desktop);
    }
  }
}

/* ---------- PRIMITIVES ---------- */
@layer primitives {
  /* Display */
  .display {
    font-family: var(--font-heading);
    font-size: var(--text-display-size);
    line-height: var(--text-display-line-height);
    letter-spacing: var(--text-display-letter-spacing);
    font-weight: var(--text-display-weight);
    color: var(--color-graphite);
    margin-block-end: var(--space-lg);
  }

  /* Label */
  .label {
    display: inline-block;
    font-family: var(--font-body);
    font-size: var(--text-label-size);
    line-height: var(--text-label-line-height);
    letter-spacing: var(--text-label-letter-spacing);
    font-weight: var(--text-label-weight);
    text-transform: uppercase;
    color: var(--color-graphite);
  }

  .label--cobalt {
    color: var(--color-cobalt);
  }

  .label--orange {
    color: var(--color-orange);
  }

  .label--porcelain {
    color: var(--color-porcelain);
  }

  /* Caption */
  .caption {
    font-size: var(--text-caption-size);
    line-height: var(--text-caption-line-height);
    letter-spacing: var(--text-caption-letter-spacing);
    color: var(--color-graphite-soft);
  }

  /* Buttons */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    font-family: var(--font-body);
    font-size: var(--text-label-size);
    line-height: var(--text-label-line-height);
    letter-spacing: var(--text-label-letter-spacing);
    font-weight: var(--text-label-weight);
    text-transform: uppercase;
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    min-height: 44px;
    transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
    white-space: nowrap;
  }

  .btn--primary {
    background-color: var(--color-cobalt);
    color: var(--color-porcelain);
    border-color: var(--color-cobalt);
  }

  .btn--primary:hover {
    background-color: var(--color-cobalt-deep);
    border-color: var(--color-cobalt-deep);
    color: var(--color-porcelain);
  }

  .btn--secondary {
    background-color: transparent;
    color: var(--color-graphite);
    border-color: var(--color-graphite);
  }

  .btn--secondary:hover {
    border-color: var(--color-cobalt);
    color: var(--color-cobalt);
  }

  .btn--dark {
    background-color: transparent;
    color: var(--color-porcelain);
    border-color: var(--color-porcelain);
  }

  .btn--dark:hover {
    border-color: var(--color-cobalt);
    color: var(--color-cobalt);
  }

  /* Tags */
  .tag {
    display: inline-flex;
    align-items: center;
    font-family: var(--font-body);
    font-size: var(--text-label-size);
    line-height: var(--text-label-line-height);
    letter-spacing: var(--text-label-letter-spacing);
    font-weight: var(--text-label-weight);
    text-transform: uppercase;
    color: var(--color-graphite);
    border: 1px solid var(--color-aluminium);
    border-radius: var(--radius-sm);
    padding: var(--space-xs) var(--space-sm);
    white-space: nowrap;
  }

  .tag--cobalt {
    color: var(--color-cobalt);
    border-color: var(--color-cobalt);
  }

  .tag--orange {
    color: var(--color-orange);
    border-color: var(--color-orange);
  }

  /* Card */
  .card {
    background-color: var(--surface-raised);
    border: var(--border-hairline);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
  }

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

  /* Panel */
  .panel {
    background-color: var(--surface-raised);
    border: var(--border-hairline);
  }

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

  /* Dark panel */
  .panel--dark {
    background-color: var(--surface-dark);
    border-color: var(--color-graphite-soft);
    color: var(--color-porcelain);
  }

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

  .panel--walnut {
    background-color: var(--surface-warm-dark);
    border-color: var(--color-aluminium);
    color: var(--color-porcelain);
  }

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

  .panel--walnut-deep {
    background-color: var(--surface-warm-deep);
    border-color: var(--color-aluminium);
    color: var(--color-porcelain);
  }

  .panel--walnut-deep > :last-child {
    margin-block-end: 0;
  }

  /* Divider */
  .divider {
    border: 0;
    border-top: var(--border-hairline);
    margin-block: var(--space-lg);
  }

  .divider--soft {
    border-top-color: var(--color-graphite-soft);
  }

  /* Focus ring for dark surfaces */
  .focus-dark:focus-visible {
    outline-color: var(--color-porcelain);
  }

  /* Tabular figures */
  .tabular {
    font-variant-numeric: var(--font-feature-tabular);
  }

  /* Visually hidden */
  .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;
  }

  /* Self-contained grid primitive */
  .grid {
    display: grid;
    gap: var(--space-md);
  }

  .grid > * {
    min-width: 0;
  }

  /* Flex utilities */
  .flex {
    display: flex;
    gap: var(--space-md);
  }

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

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

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

  .flex--align-start {
    align-items: flex-start;
  }

  .flex--align-end {
    align-items: flex-end;
  }

  .flex--justify-between {
    justify-content: space-between;
  }

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

  .flex--justify-end {
    justify-content: flex-end;
  }

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

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

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

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

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