/* ============================================
   Kindred Code
   ============================================ */

/* Fonts */
@import url(fontawesome-all.min.css);
@import url("https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,300..900;1,9..144,300..900&family=Manrope:wght@300..800&display=swap");

/* ----------------------------------------
   Design Tokens
   ---------------------------------------- */
:root {
  color-scheme: light dark;

  /* Palette – Light */
  --color-bg: #faf9f6;
  --color-bg-alt: #f0efeb;
  --color-surface: #ffffff;
  --color-text: #1a1a1d;
  --color-text-secondary: #6b6b6f;
  --color-accent: #e86a50;
  --color-accent-hover: #d45a42;
  --color-accent-subtle: rgba(232, 106, 80, 0.07);
  --color-border: rgba(26, 26, 29, 0.09);

  /* Band surfaces (hero, footer) */
  --band-bg: #eae9e5;
  --band-text: #1a1a1d;
  --band-muted: #6b6b6f;
  --band-border: rgba(26, 26, 29, 0.10);
  --band-highlight: rgba(255, 255, 255, 0.5);
  --band-subtle: rgba(26, 26, 29, 0.04);

  /* Typography */
  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Manrope", system-ui, sans-serif;

  /* Spacing */
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 8rem;

  /* Layout */
  --max-width: 64rem;
  --radius: 12px;
  --radius-lg: 22px;

  /* Motion */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --duration: 0.3s;
  --duration-slow: 0.7s;
}

/* Dark palette — manual override */
:root[data-theme="dark"] {
  color-scheme: dark;
  --color-bg: #111113;
  --color-bg-alt: #19191c;
  --color-surface: #222226;
  --color-text: #ededeb;
  --color-text-secondary: #8a8a8d;
  --color-accent: #f08770;
  --color-accent-hover: #f5a090;
  --color-accent-subtle: rgba(240, 135, 112, 0.09);
  --color-border: rgba(237, 237, 235, 0.07);
  --band-bg: #0a0a0c;
  --band-text: #ededed;
  --band-muted: #8a8a8d;
  --band-border: rgba(255, 255, 255, 0.08);
  --band-highlight: rgba(255, 255, 255, 0.15);
  --band-subtle: rgba(255, 255, 255, 0.04);
}

/* Dark palette — auto (system preference) */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --color-bg: #111113;
    --color-bg-alt: #19191c;
    --color-surface: #222226;
    --color-text: #ededeb;
    --color-text-secondary: #8a8a8d;
    --color-accent: #f08770;
    --color-accent-hover: #f5a090;
    --color-accent-subtle: rgba(240, 135, 112, 0.09);
    --color-border: rgba(237, 237, 235, 0.07);
    --band-bg: #0a0a0c;
    --band-text: #ededed;
    --band-muted: #8a8a8d;
    --band-border: rgba(255, 255, 255, 0.08);
    --band-highlight: rgba(255, 255, 255, 0.15);
    --band-subtle: rgba(255, 255, 255, 0.04);
  }
}

/* Light palette — manual override (reset color-scheme) */
:root[data-theme="light"] {
  color-scheme: light;
}

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

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

body {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul,
ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.2;
  color: var(--color-text);
  text-wrap: balance;
}

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

.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;
}

/* ----------------------------------------
   Page load animation
   ---------------------------------------- */
body.is-preload * {
  animation: none !important;
  transition: none !important;
}

/* ----------------------------------------
   Header
   ---------------------------------------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-sm) 0;
  transition:
    background-color var(--duration) var(--ease),
    box-shadow var(--duration) var(--ease),
    padding var(--duration) var(--ease);
}

.header.is-scrolled {
  background-color: var(--color-bg);
  box-shadow: 0 1px 0 var(--color-border);
  padding: 0.6rem 0;
}

@supports (backdrop-filter: blur(12px)) {
  .header.is-scrolled {
    background-color: rgba(250, 249, 246, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
  }

  [data-theme="dark"] .header.is-scrolled {
    background-color: rgba(17, 17, 19, 0.85);
  }
}

@media (prefers-color-scheme: dark) {
  @supports (backdrop-filter: blur(12px)) {
    :root:not([data-theme="light"]) .header.is-scrolled {
      background-color: rgba(17, 17, 19, 0.85);
    }
  }
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header__logo {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--band-text);
  text-decoration: none;
  letter-spacing: -0.01em;
  transition:
    opacity var(--duration) var(--ease),
    color var(--duration) var(--ease);
}

.header__logo:hover {
  opacity: 0.7;
}

.header.is-scrolled .header__logo {
  color: var(--color-text);
}

.header__nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ----------------------------------------
   Hamburger Menu
   ---------------------------------------- */
.header__menu {
  position: relative;
}

.header__menu-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: none;
  border-radius: 100px;
  background: transparent;
  cursor: pointer;
  color: var(--band-muted);
  transition:
    color var(--duration) var(--ease),
    background-color var(--duration) var(--ease);
}

.header__menu-btn:hover {
  color: var(--band-text);
}

.header.is-scrolled .header__menu-btn {
  color: var(--color-text-secondary);
}

.header.is-scrolled .header__menu-btn:hover {
  color: var(--color-text);
}

.header__menu-btn svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
}

.header__dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 140px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow:
    0 8px 24px -4px rgba(0, 0, 0, 0.1),
    0 2px 8px -2px rgba(0, 0, 0, 0.06);
  padding: 6px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition:
    opacity var(--duration) var(--ease),
    visibility var(--duration) var(--ease),
    transform var(--duration) var(--ease);
}

.header__dropdown.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.header__dropdown a {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: 0.02em;
  padding: 0.5em 0.75em;
  border-radius: calc(var(--radius) - 4px);
  transition:
    color var(--duration) var(--ease),
    background-color var(--duration) var(--ease);
}

.header__dropdown a:hover {
  color: var(--color-text);
  background-color: var(--color-bg-alt);
}

/* ----------------------------------------
   Theme Toggle
   ---------------------------------------- */
.theme-toggle {
  display: flex;
  align-items: center;
  gap: 2px;
  background-color: var(--band-subtle);
  border: 1px solid var(--band-border);
  border-radius: 100px;
  padding: 3px;
}

.header.is-scrolled .theme-toggle {
  background-color: var(--color-bg-alt);
  border-color: var(--color-border);
}

.theme-toggle__btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: none;
  border-radius: 100px;
  background: transparent;
  cursor: pointer;
  color: var(--band-muted);
  transition:
    color var(--duration) var(--ease),
    background-color var(--duration) var(--ease);
}

.header.is-scrolled .theme-toggle__btn {
  color: var(--color-text-secondary);
}

.theme-toggle__btn:hover {
  color: var(--band-text);
}

.header.is-scrolled .theme-toggle__btn:hover {
  color: var(--color-text);
}

.theme-toggle__btn[aria-pressed="true"] {
  background-color: var(--band-highlight);
  color: var(--band-text);
}

.header.is-scrolled .theme-toggle__btn[aria-pressed="true"] {
  background-color: var(--color-surface);
  color: var(--color-text);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.theme-toggle__btn svg {
  width: 14px;
  height: 14px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ----------------------------------------
   Hero
   ---------------------------------------- */
.hero {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: 70vh;
  padding: calc(var(--space-xl) + 4rem) var(--space-md) var(--space-xl);
  overflow: hidden;
  background-color: var(--band-bg);
  color: var(--band-text);
}

.hero__content {
  position: relative;
  z-index: 1;
}

.hero__title {
  font-size: clamp(2.75rem, 7vw, 5.5rem);
  font-weight: 400;
  font-style: italic;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: var(--space-sm);
  font-variation-settings: "opsz" 72;
  color: var(--band-text);
  opacity: 0;
  transform: translateY(20px);
  animation: revealUp 0.8s var(--ease) 0.15s forwards;
}

.hero__title em {
  font-style: italic;
  color: var(--color-accent);
}

.hero__subtitle {
  font-family: var(--font-body);
  font-size: 1.125rem;
  font-weight: 400;
  color: var(--band-muted);
  opacity: 0;
  transform: translateY(16px);
  animation: revealUp 0.8s var(--ease) 0.35s forwards;
}

.hero__subtitle a {
  color: var(--band-muted);
  text-decoration: underline;
  text-decoration-color: var(--band-border);
  text-underline-offset: 3px;
  transition:
    color var(--duration) var(--ease),
    text-decoration-color var(--duration) var(--ease);
}

.hero__subtitle a:hover {
  color: var(--band-text);
  text-decoration-color: var(--band-text);
}

/* ----------------------------------------
   Section
   ---------------------------------------- */
.section {
  padding: var(--space-xl) 0;
}

/* ----------------------------------------
   App Card
   ---------------------------------------- */
.app-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
  max-width: 48rem;
  margin-inline: auto;
}

.app-card {
  text-align: center;
  padding: var(--space-lg) var(--space-md);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: box-shadow var(--duration-slow) var(--ease);
}

.app-card:hover {
  box-shadow: 0 24px 64px -16px rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] .app-card:hover {
  box-shadow: 0 24px 64px -16px rgba(0, 0, 0, 0.3);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .app-card:hover {
    box-shadow: 0 24px 64px -16px rgba(0, 0, 0, 0.3);
  }
}

.app-card__badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  background-color: var(--color-accent-subtle);
  padding: 0.35em 1em;
  border-radius: 100px;
  margin-bottom: var(--space-md);
}

.app-card__badge--muted {
  color: var(--color-text-secondary);
  background-color: var(--color-bg-alt);
}

.app-card__icon {
  width: 140px;
  height: 140px;
  object-fit: cover;
  margin: 0 auto var(--space-md);
  filter:
    drop-shadow(0 8px 32px rgba(0, 0, 0, 0.12))
    drop-shadow(0 2px 8px rgba(0, 0, 0, 0.06));
  transition: transform var(--duration) var(--ease);
}

.app-card__icon--dark {
  display: none;
}

[data-theme="dark"] .app-card__icon--light {
  display: none;
}

[data-theme="dark"] .app-card__icon--dark {
  display: block;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .app-card__icon--light {
    display: none;
  }

  :root:not([data-theme="light"]) .app-card__icon--dark {
    display: block;
  }
}

.app-card:hover .app-card__icon {
  transform: translateY(-4px) scale(1.02);
}

.app-card__name {
  font-size: 1.75rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.app-card__desc {
  color: var(--color-text-secondary);
  font-size: 1.05rem;
  max-width: 28rem;
  margin-inline: auto;
}

.app-card__cta {
  margin-top: var(--space-md);
}

/* ----------------------------------------
   Button
   ---------------------------------------- */
.button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.01em;
  color: var(--color-accent);
  background-color: transparent;
  border: 1.5px solid var(--color-accent);
  border-radius: 100px;
  padding: 0.85em 1.75em;
  cursor: pointer;
  text-decoration: none;
  transition:
    background-color var(--duration) var(--ease),
    color var(--duration) var(--ease),
    transform var(--duration) var(--ease);
}

.button:hover {
  background-color: var(--color-accent);
  color: #fff;
  transform: translateY(-1px);
}

.button:active {
  transform: translateY(0);
}

/* ----------------------------------------
   Content page (privacy, error)
   ---------------------------------------- */
.page-content {
  padding: calc(var(--space-xl) + 4rem) 0 var(--space-xl);
  min-height: 50vh;
}

.page-content .container {
  max-width: 42rem;
}

.page-content__title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 400;
  font-style: italic;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-lg);
  font-variation-settings: "opsz" 72;
}

.page-content h2 {
  font-size: 1.35rem;
  font-weight: 600;
  margin-top: var(--space-md);
  margin-bottom: 0.75rem;
}

.page-content p {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-sm);
  line-height: 1.8;
}

.page-content p:last-child {
  margin-bottom: 0;
}

.page-content a {
  text-decoration: underline;
  text-decoration-color: var(--color-accent);
  text-underline-offset: 2px;
}

/* Error pages */
.error-page {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: 60vh;
}

.error-page__code {
  font-family: var(--font-display);
  font-size: clamp(5rem, 15vw, 10rem);
  font-weight: 300;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--color-border);
  font-variation-settings: "opsz" 144;
}

[data-theme="dark"] .error-page__code {
  color: var(--color-surface);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .error-page__code {
    color: var(--color-surface);
  }
}

.error-page__message {
  font-size: 1.15rem;
  color: var(--color-text-secondary);
  margin-top: var(--space-sm);
  margin-bottom: var(--space-md);
}

.error-page__link {
  font-weight: 600;
}

/* ----------------------------------------
   Footer
   ---------------------------------------- */
.footer {
  background-color: var(--band-bg);
  color: var(--band-text);
  padding: var(--space-xl) 0 var(--space-lg);
  text-align: center;
}

.footer__heading {
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--band-text);
  margin-bottom: var(--space-md);
}

.social-links {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.social-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--band-muted);
  padding: 0.6em 1.25em;
  border: 1px solid var(--band-border);
  border-radius: 100px;
  transition:
    color var(--duration) var(--ease),
    border-color var(--duration) var(--ease),
    background-color var(--duration) var(--ease);
}

.social-links a:hover {
  color: var(--band-text);
  border-color: var(--band-muted);
  background-color: var(--band-subtle);
}

.social-links i {
  font-size: 1rem;
}

.copyright {
  font-size: 0.8rem;
  color: var(--band-muted);
}

.copyright a {
  color: var(--band-muted);
  text-decoration: underline;
  text-decoration-color: var(--band-border);
  text-underline-offset: 2px;
  transition:
    color var(--duration) var(--ease),
    text-decoration-color var(--duration) var(--ease);
}

.copyright a:hover {
  color: var(--band-text);
  text-decoration-color: var(--band-text);
}

/* ----------------------------------------
   Animations
   ---------------------------------------- */
@keyframes revealUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 0.8s var(--ease),
    transform 0.8s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }

/* ----------------------------------------
   Responsive
   ---------------------------------------- */
@media screen and (max-width: 768px) {
  :root {
    --space-xl: 5rem;
    --space-lg: 3rem;
  }

  .hero {
    min-height: 55vh;
    padding-top: calc(var(--space-xl) + 2rem);
  }

  .app-card {
    padding: var(--space-lg) var(--space-sm);
  }

  .app-card__icon {
    width: 110px;
    height: 110px;
    border-radius: 24px;
  }

  .app-card__name {
    font-size: 1.4rem;
  }

  .social-links {
    flex-direction: column;
    align-items: center;
  }
}

@media screen and (max-width: 480px) {
  :root {
    --space-xl: 4rem;
    --space-lg: 2.5rem;
    --space-md: 1.5rem;
  }

  .header__logo {
    font-size: 1rem;
  }
}

/* ----------------------------------------
   Accessibility
   ---------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

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

::selection {
  background-color: var(--color-accent);
  color: #fff;
}