/* ==========================================================================
   Shelf Life — website styles
   Design tokens are derived from the app's "green" colour scheme
   (see src/constants/theme.ts) so the website and app feel like one product.
   ========================================================================== */

:root {
  /* Colour tokens (from Colors.green in src/constants/theme.ts) */
  --color-ink: #123a22;
  --color-ink-soft: #1c4a2c;
  --color-bg: #e6f2df;
  --color-surface: #ffffff;
  --color-surface-selected: #d7ead0;
  --color-muted: #5c8a63;
  --color-accent: #2c8a4e;
  --color-accent-dark: #0b5c34;
  --color-border: rgba(11, 92, 52, 0.14);
  --color-cream: #f7f3e9;

  /* Hero-specific (dark, photographic-style surface) */
  --hero-ink: #0b1f14;
  --hero-text: #f6f3e9;
  --hero-text-soft: rgba(246, 243, 233, 0.78);
  --hero-tile-border: rgba(246, 243, 233, 0.38);
  --hero-tile-bg: rgba(11, 31, 20, 0.28);
  --hero-tile-bg-active: rgba(246, 243, 233, 0.16);

  /* Typography */
  --font-serif: 'Lora', Georgia, 'Times New Roman', serif;
  --font-sans: system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;

  /* Spacing scale (mirrors Spacing in src/constants/theme.ts, expressed in rem) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
  --space-6: 4rem;

  --container-max: 1200px;
  --radius: 2px;
  --transition-fast: 0.15s ease;
  --transition-med: 0.35s ease;
}

@media (prefers-reduced-motion: reduce) {
  :root {
    --transition-fast: 0s;
    --transition-med: 0s;
  }
}

/* ==========================================================================
   Reset / base
   ========================================================================== */

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

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-ink);
  background: var(--color-bg);
  overflow-x: hidden;
}

h1,
h2,
h3 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.2;
  margin: 0 0 var(--space-3);
  color: var(--color-ink);
}

p {
  margin: 0 0 var(--space-3);
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

a {
  color: inherit;
}

img,
svg {
  display: block;
  max-width: 100%;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
}

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

.skip-link {
  position: absolute;
  left: var(--space-3);
  top: -3rem;
  background: var(--color-surface);
  color: var(--color-ink);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius);
  z-index: 100;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-3);
}

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

/* ==========================================================================
   Header
   ========================================================================== */

.site-header {
  position: relative;
  z-index: 20;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--space-3) var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.logo {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.25rem;
  color: var(--color-accent-dark);
  text-decoration: none;
  white-space: nowrap;
}

.main-nav {
  flex: 1;
}

.main-nav ul {
  display: flex;
  gap: var(--space-5);
  justify-content: center;
}

.main-nav a {
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--color-ink-soft);
  padding: var(--space-1) 0;
  border-bottom: 2px solid transparent;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.main-nav a:hover,
.main-nav a:focus-visible {
  color: var(--color-accent-dark);
  border-bottom-color: var(--color-accent);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.login-btn {
  font-size: 0.9375rem;
  font-weight: 600;
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--color-accent-dark);
  border-radius: var(--radius);
  color: var(--color-accent-dark);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.login-btn:hover,
.login-btn:focus-visible {
  background: var(--color-accent-dark);
  color: var(--color-surface);
}

.login-msg {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--space-2) var(--space-4);
  background: var(--color-surface-selected);
  color: var(--color-ink);
  font-size: 0.875rem;
  text-align: center;
  border-bottom: 1px solid var(--color-border);
}

.menu-toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
}

.menu-toggle__bars,
.menu-toggle__bars::before,
.menu-toggle__bars::after {
  display: block;
  width: 1.375rem;
  height: 2px;
  background: var(--color-ink);
  border-radius: 1px;
}

.menu-toggle__bars {
  position: relative;
}

.menu-toggle__bars::before,
.menu-toggle__bars::after {
  content: '';
  position: absolute;
  left: 0;
}

.menu-toggle__bars::before {
  top: -6px;
}

.menu-toggle__bars::after {
  top: 6px;
}

.mobile-nav {
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
}

.mobile-nav ul {
  display: flex;
  flex-direction: column;
}

.mobile-nav a,
.mobile-login {
  display: block;
  width: 100%;
  text-align: left;
  padding: var(--space-3) var(--space-4);
  text-decoration: none;
  font-weight: 600;
  color: var(--color-ink-soft);
  border-bottom: 1px solid var(--color-border);
}

.mobile-nav a:hover,
.mobile-nav a:focus-visible,
.mobile-login:hover,
.mobile-login:focus-visible {
  color: var(--color-accent-dark);
  background: var(--color-bg);
}

/* ==========================================================================
   Hero
   ========================================================================== */

.hero {
  position: relative;
  isolation: isolate;
  min-height: min(52rem, 100svh);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: var(--space-6) var(--space-4) var(--space-4);
  color: var(--hero-text);
  overflow: hidden;
}

.hero__backgrounds {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.hero__bg {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity var(--transition-med);
  background-color: var(--hero-ink);
}

.hero__bg.is-active {
  opacity: 1;
}

/* Each state is an original CSS composition (gradients + geometric shapes),
   inspired by book spines / record grooves — no photography, no external
   assets. Replace with real photography later; see website/README.md. */

.hero__bg--books {
  background-image:
    repeating-linear-gradient(
      100deg,
      rgba(246, 243, 233, 0.07) 0px,
      rgba(246, 243, 233, 0.07) 14px,
      transparent 14px,
      transparent 46px
    ),
    linear-gradient(160deg, #0b5c34 0%, #123a22 55%, #0b1f14 100%);
  /* Future photography:
     background-image: url('assets/images/hero-books.webp'),
       linear-gradient(160deg, #0b5c34 0%, #123a22 55%, #0b1f14 100%);
     background-size: cover;
     background-position: center; */
}

.hero__bg--vinyl {
  background-image:
    radial-gradient(circle at 78% 45%, rgba(246, 243, 233, 0.14) 0, rgba(246, 243, 233, 0.14) 2px, transparent 2px),
    radial-gradient(circle at 78% 45%, transparent 60px, rgba(246, 243, 233, 0.08) 61px, transparent 62px),
    radial-gradient(circle at 78% 45%, transparent 100px, rgba(246, 243, 233, 0.08) 101px, transparent 102px),
    radial-gradient(circle at 78% 45%, transparent 140px, rgba(246, 243, 233, 0.08) 141px, transparent 142px),
    linear-gradient(160deg, #123a22 0%, #0b1f14 70%);
  /* Future photography:
     background-image: url('assets/images/hero-vinyl.webp'),
       linear-gradient(160deg, #123a22 0%, #0b1f14 70%);
     background-size: cover;
     background-position: center; */
}

.hero__bg--download {
  background-image:
    linear-gradient(120deg, rgba(246, 243, 233, 0.08) 0%, transparent 45%),
    linear-gradient(150deg, #0b5c34 0%, #0b1f14 80%);
  /* Future photography:
     background-image: url('assets/images/hero-download.webp'),
       linear-gradient(150deg, #0b5c34 0%, #0b1f14 80%);
     background-size: cover;
     background-position: center; */
}

.hero__bg--login {
  background-image:
    linear-gradient(200deg, rgba(246, 243, 233, 0.09) 0%, transparent 50%),
    linear-gradient(160deg, #123a22 0%, #0b1f14 75%);
  /* Future photography:
     background-image: url('assets/images/hero-login.webp'),
       linear-gradient(160deg, #123a22 0%, #0b1f14 75%);
     background-size: cover;
     background-position: center; */
}

.hero__scrim {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11, 31, 20, 0.35) 0%, rgba(11, 31, 20, 0.15) 40%, rgba(11, 31, 20, 0.55) 100%);
  z-index: -1;
}

.hero__content {
  max-width: 44rem;
}

.hero__headline {
  color: var(--hero-text);
  font-size: clamp(2rem, 5.5vw, 3.5rem);
  margin-bottom: var(--space-3);
}

.hero__subcopy {
  color: var(--hero-text-soft);
  font-size: clamp(1rem, 2vw, 1.1875rem);
  max-width: 32rem;
  margin-bottom: 0;
}

/* Tiles */

.tiles {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.tile {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: var(--space-1);
  text-align: left;
  text-decoration: none;
  min-height: 7.5rem;
  padding: var(--space-3);
  border: 1px solid var(--hero-tile-border);
  border-radius: var(--radius);
  background: var(--hero-tile-bg);
  color: var(--hero-text);
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.tile__name {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.0625rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.tile__sub {
  font-size: 0.8125rem;
  color: var(--hero-text-soft);
}

.tile:hover,
.tile:focus-visible,
.tile[aria-pressed='true'] {
  background: var(--hero-tile-bg-active);
  border-color: var(--hero-text);
}

.hero__footer-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-top: var(--space-5);
}

.social-links {
  display: flex;
  gap: var(--space-3);
}

.social-links a {
  display: flex;
  width: 2rem;
  height: 2rem;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: var(--hero-text);
  opacity: 0.8;
  transition: opacity var(--transition-fast);
}

.social-links a:hover,
.social-links a:focus-visible {
  opacity: 1;
}

.social-links svg {
  width: 1.125rem;
  height: 1.125rem;
  fill: currentColor;
}

.scroll-cue {
  writing-mode: vertical-rl;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--hero-text-soft);
  transition: color var(--transition-fast);
}

.scroll-cue:hover,
.scroll-cue:focus-visible {
  color: var(--hero-text);
}

/* ==========================================================================
   About
   ========================================================================== */

.about {
  background: var(--color-cream);
  padding: var(--space-6) var(--space-4);
}

.about__inner {
  max-width: var(--container-max);
  margin: 0 auto;
}

.about__inner > h2 {
  font-size: clamp(1.5rem, 3vw, 2.125rem);
  max-width: 34rem;
}

.about__inner > p {
  max-width: 40rem;
  color: var(--color-ink-soft);
  font-size: 1.0625rem;
}

.about__points {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-5);
}

.about__points h3 {
  font-size: 1.0625rem;
  margin-bottom: var(--space-1);
}

.about__points p {
  color: var(--color-muted);
  font-size: 0.9375rem;
  margin-bottom: 0;
}

.about__points li {
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border);
}

/* ==========================================================================
   Download
   ========================================================================== */

.download {
  background: var(--color-bg);
  padding: var(--space-6) var(--space-4);
}

.download__inner {
  max-width: var(--container-max);
  margin: 0 auto;
}

.download__inner > h2 {
  font-size: clamp(1.5rem, 3vw, 2.125rem);
}

.download__inner > p {
  max-width: 36rem;
  color: var(--color-ink-soft);
}

.platforms {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.platform {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  min-width: 12rem;
}

.platform__name {
  font-weight: 600;
  color: var(--color-ink);
  display: block;
}

.platform__status {
  font-size: 0.8125rem;
  color: var(--color-muted);
  display: block;
}

a.platform {
  text-decoration: none;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

a.platform:hover,
a.platform:focus-visible {
  border-color: var(--color-accent);
  background: var(--color-surface-selected);
}

.platform--unavailable {
  opacity: 0.7;
  cursor: default;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  background: var(--color-accent-dark);
  color: var(--color-cream);
}

.site-footer__inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--space-5) var(--space-4);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3) var(--space-5);
}

.site-footer__brand {
  font-family: var(--font-serif);
  font-weight: 600;
  margin: 0;
}

.site-footer__domain {
  margin: 0;
  opacity: 0.8;
  font-size: 0.9375rem;
}

.site-footer nav ul {
  display: flex;
  gap: var(--space-4);
}

.site-footer nav a {
  text-decoration: none;
  font-size: 0.9375rem;
  opacity: 0.85;
}

.site-footer nav a:hover,
.site-footer nav a:focus-visible {
  opacity: 1;
  text-decoration: underline;
}

.site-footer__copyright {
  margin: 0 0 0 auto;
  font-size: 0.8125rem;
  opacity: 0.7;
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 1024px) {
  .tiles {
    grid-template-columns: repeat(2, 1fr);
  }

  .about__points {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }
}

@media (max-width: 768px) {
  .main-nav,
  .login-wrap {
    display: none;
  }

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

  .hero {
    padding: var(--space-5) var(--space-3) var(--space-3);
    min-height: auto;
  }

  .hero__footer-row {
    flex-direction: column-reverse;
    align-items: flex-start;
    gap: var(--space-3);
  }

  .scroll-cue {
    writing-mode: horizontal-tb;
  }

  .site-footer__inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .site-footer__copyright {
    margin-left: 0;
  }
}

@media (max-width: 480px) {
  .tiles {
    grid-template-columns: 1fr;
  }

  .site-header__inner {
    padding: var(--space-2) var(--space-3);
  }
}