/* ==========================================================================
   MillionMine — style.css
   Premium minimal software-studio aesthetic. No frameworks, no libraries.
   ========================================================================== */

:root {
  /* Color — light (off-white) */
  --color-bg: #f6f6f4;
  --color-surface: #ffffff;
  --color-surface-alt: #eeeeec;
  --color-border: #dcdcd7;
  --color-text: #1b1c1e;
  --color-text-muted: #5c5f66;
  --color-heading: #101113;
  --color-accent: #2f5bd7;
  --color-accent-contrast: #ffffff;

  /* Status */
  --status-active: #1f7a4d;
  --status-development: #8a6d1f;
  --status-experimental: #6b4fbf;

  /* Spacing scale */
  --space-2xs: 0.25rem;
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2.5rem;
  --space-2xl: clamp(3rem, 8vw, 6rem);
  --space-3xl: clamp(4rem, 12vw, 9rem);

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, "Helvetica Neue", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    "Liberation Mono", monospace;
  --text-base: 1rem;
  --leading-body: 1.6;
  --tracking-tight: -0.02em;

  /* Layout */
  --container-width: 1120px;
  --transition: 160ms ease;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #141517;
    --color-surface: #1c1e21;
    --color-surface-alt: #202226;
    --color-border: #303338;
    --color-text: #e7e8ea;
    --color-text-muted: #a1a5ac;
    --color-heading: #f5f6f7;
    --color-accent: #7ea0ff;
    --color-accent-contrast: #10131b;

    --status-active: #57c98c;
    --status-development: #d7b761;
    --status-experimental: #b7a3ee;
  }
}

/* --------------------------------------------------------------------------
   Base
   -------------------------------------------------------------------------- */

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

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

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3 {
  color: var(--color-heading);
  line-height: 1.2;
  letter-spacing: var(--tracking-tight);
  margin: 0;
}

p {
  margin: 0;
}

a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

/* --------------------------------------------------------------------------
   Layout helpers
   -------------------------------------------------------------------------- */

.container {
  width: 100%;
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 5vw, 2.5rem);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--color-accent);
  color: var(--color-accent-contrast);
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-sm);
}

.skip-link:focus {
  left: var(--space-md);
  top: var(--space-md);
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  min-height: 64px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  color: var(--color-heading);
  font-weight: 600;
  letter-spacing: var(--tracking-tight);
}

.brand:hover {
  text-decoration: none;
}

.brand__mark {
  width: 14px;
  height: 14px;
  border-radius: 4px;
  background: var(--color-accent);
  transform: rotate(45deg);
}

.brand__name {
  font-size: 1.05rem;
}

.site-nav {
  display: flex;
  gap: clamp(1rem, 3vw, 2rem);
}

.site-nav a {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  transition: color var(--transition);
}

.site-nav a:hover {
  color: var(--color-heading);
  text-decoration: none;
}

@media (max-width: 640px) {
  .site-nav {
    display: none;
  }
}

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */

.hero {
  padding-block: var(--space-3xl);
  border-bottom: 1px solid var(--color-border);
}

.hero__eyebrow {
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  margin-bottom: var(--space-lg);
}

.hero__title {
  font-size: clamp(2.25rem, 6vw, 3.75rem);
  max-width: 16ch;
}

.hero__subtitle {
  margin-top: var(--space-lg);
  max-width: 52ch;
  font-size: clamp(1.05rem, 2.2vw, 1.25rem);
  color: var(--color-text-muted);
}

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

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-weight: 550;
  font-size: 0.98rem;
  border: 1px solid transparent;
  transition: background var(--transition), border-color var(--transition),
    color var(--transition), transform var(--transition);
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.btn--primary {
  background: var(--color-accent);
  color: var(--color-accent-contrast);
}

.btn--primary:hover {
  background: color-mix(in srgb, var(--color-accent) 88%, #000);
}

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

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

/* --------------------------------------------------------------------------
   Sections
   -------------------------------------------------------------------------- */

.section {
  padding-block: var(--space-2xl);
}

.section--alt {
  background: var(--color-surface-alt);
  border-block: 1px solid var(--color-border);
}

.section__title {
  font-size: clamp(1.5rem, 3.5vw, 2.1rem);
}

.section__lead {
  margin-top: var(--space-md);
  max-width: 56ch;
  color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   Grid + cards
   -------------------------------------------------------------------------- */

.grid {
  margin-top: var(--space-xl);
  display: grid;
  gap: var(--space-lg);
}

.grid--3 {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.grid--4 {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: border-color var(--transition), transform var(--transition);
}

.card:hover {
  border-color: color-mix(in srgb, var(--color-accent) 45%, var(--color-border));
  transform: translateY(-2px);
}

.card__title {
  font-size: 1.15rem;
}

.card__text {
  margin-top: var(--space-sm);
  color: var(--color-text-muted);
  font-size: 0.97rem;
}

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

.card--product .card__text {
  flex: 1;
}

/* Status labels */
.status {
  margin-top: var(--space-md);
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  border: 1px solid currentColor;
}

.status--active { color: var(--status-active); }
.status--development { color: var(--status-development); }
.status--experimental { color: var(--status-experimental); }

/* --------------------------------------------------------------------------
   Contact
   -------------------------------------------------------------------------- */

.contact__email {
  margin-top: var(--space-lg);
  font-size: clamp(1.25rem, 4vw, 1.9rem);
  font-weight: 600;
  letter-spacing: var(--tracking-tight);
}

.contact__email a {
  color: var(--color-heading);
}

.contact__email a:hover {
  color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */

.site-footer {
  padding-block: var(--space-xl);
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
  align-items: baseline;
  justify-content: space-between;
}

.site-footer__brand {
  max-width: 40ch;
}

.site-footer__brand .brand__name {
  color: var(--color-heading);
  font-weight: 600;
}

.site-footer__note {
  margin-top: var(--space-xs);
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

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

.site-footer__nav a {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  transition: color var(--transition);
}

.site-footer__nav a:hover {
  color: var(--color-heading);
  text-decoration: none;
}

.site-footer__copy {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

/* --------------------------------------------------------------------------
   Content pages (privacy, 404)
   -------------------------------------------------------------------------- */

.page {
  padding-block: var(--space-3xl) var(--space-2xl);
}

.page__title {
  font-size: clamp(2rem, 5vw, 3rem);
}

.page__meta {
  margin-top: var(--space-sm);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.prose {
  max-width: 65ch;
  margin-top: var(--space-xl);
}

.prose h2 {
  font-size: 1.25rem;
  margin-top: var(--space-xl);
}

.prose p {
  margin-top: var(--space-md);
  color: var(--color-text-muted);
}

.prose a {
  color: var(--color-accent);
}

.error-page {
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
}

.error-page__code {
  font-family: var(--font-mono);
  color: var(--color-accent);
  font-size: 1rem;
  letter-spacing: 0.1em;
}