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

/* ── Spacing scale (4pt base) ── */
:root {
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 12px;
  --space-lg: 16px;
  --space-xl: 24px;
  --space-2xl: 32px;
  --space-3xl: 48px;
  --space-4xl: 64px;
  --space-5xl: 96px;

  /* ── Monochromatic palette ── */
  --color-bg: #ffffff;
  --color-bg-alt: #f5f5f5;
  --color-surface: #ffffff;
  --color-surface-alt: #ebebeb;
  --color-ink: #000000;
  --color-ink-soft: #555555;
  --color-ink-muted: #999999;
  --color-border: #e5e5e5;
  --color-border-strong: #cccccc;
  --color-accent: #000000;
  --color-accent-hover: #333333;
  --color-tab-inactive: #bbbbbb;

  /* ── Typography ── */
  --font-body: "Inter", system-ui, -apple-system, sans-serif;

  /* ── Shadows ── */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);

  /* ── Radii ── */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 999px;
}

/* ── Base ── */
html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-ink);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--color-ink);
  text-decoration: none;
  transition: color 0.2s;
}

.container {
  max-width: 1000px;
  margin-inline: auto;
  padding-inline: var(--space-xl);
}

/* ── Typography ── */
h1, h2, h3 {
  font-weight: 700;
  line-height: 1.2;
  text-wrap: balance;
}

h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  letter-spacing: -0.03em;
}

h2 {
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  letter-spacing: -0.02em;
}

p {
  max-width: 65ch;
  color: var(--color-ink-soft);
}

/* ── Navigation ── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.nav__logo {
  font-weight: 800;
  font-size: 1.125rem;
  color: var(--color-ink);
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
}

.nav__logo-img {
  display: block;
}

.nav__list {
  display: flex;
  gap: var(--space-2xl);
  list-style: none;
}

.nav__list a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-ink-muted);
  position: relative;
  padding-block: var(--space-xs);
}

.nav__list a:hover {
  color: var(--color-ink);
}

.nav__list a::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--color-ink);
  transition: width 0.2s;
}

.nav__list a:hover::after {
  width: 100%;
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-ink);
  border-radius: 2px;
  transition: all 0.25s;
}

.nav__toggle[aria-expanded="true"] span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav__toggle[aria-expanded="true"] span:nth-child(2) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ── Language switcher ── */
.lang-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-xs) var(--space-sm);
  margin-left: var(--space-lg);
  border-radius: var(--radius-sm);
  transition: background 0.2s;
}

.lang-btn:hover {
  background: var(--color-bg-alt);
}

.lang-opt {
  display: flex;
  align-items: center;
  line-height: 0;
  opacity: 0.5;
  transition: opacity 0.2s;
}

.lang-opt.is-active {
  opacity: 1;
}

.lang-divider {
  font-size: 0.75rem;
  color: var(--color-ink-muted);
  line-height: 1;
}

/* ── Page header (no hero) ── */
.page-header {
  padding-top: 96px;
  padding-bottom: var(--space-3xl);
}

.page-header__title {
  margin-bottom: var(--space-sm);
}

.page-header__desc {
  font-size: 1rem;
  color: var(--color-ink-muted);
}

/* ── Section shared ── */
.section {
  padding-block: var(--space-4xl);
}

.section__title {
  margin-bottom: var(--space-lg);
}

/* ── Tabs ── */
.tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-3xl);
}

.tab {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-tab-inactive);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  padding: var(--space-md) 0;
  margin-right: var(--space-2xl);
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
  white-space: nowrap;
}

.tab:hover {
  color: var(--color-ink-soft);
}

.tab--active {
  color: var(--color-ink);
  font-weight: 600;
  border-bottom-color: var(--color-ink);
}

.tab-panel {
  display: none;
}

.tab-panel--active {
  display: block;
}

/* ── App Grid ── */
.app-grid {
  display: grid;
  gap: var(--space-lg);
}

/* ── App Card (appstore style) ── */
.app-card {
  display: grid;
  grid-template-columns: 64px 1fr auto;
  gap: var(--space-lg);
  align-items: center;
  padding: var(--space-lg);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  transition: border-color 0.2s, box-shadow 0.2s;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
}

.app-card:not([href]) {
  cursor: default;
}

.app-card:hover {
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-md);
}

.app-card:not([href]):hover {
  border-color: var(--color-border);
  box-shadow: none;
}

.app-card--new {
  border-color: var(--color-border-strong);
}

.app-card__icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-lg);
  background: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  flex-shrink: 0;
  overflow: hidden;
}

.app-card__img {
  width: 100%;
  height: 100%;
  display: block;
}

.app-card__badge {
  position: absolute;
  top: -6px;
  right: -6px;
  font-size: 0.625rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: #fff;
  background: var(--color-ink);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  line-height: 1.2;
}

/* ── Status badge (inline next to title) ── */
.status-badge {
  display: inline-block;
  font-size: 0.625rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 1px 7px;
  border-radius: 3px;
  margin-left: 8px;
  vertical-align: middle;
  line-height: 1.4;
  border: 1px solid;
}

.status-badge--active {
  background: #edf5ed;
  color: #3a6b3a;
  border-color: #d4e0d4;
}

.status-badge--archived {
  background: #f5edec;
  color: #6b3a3a;
  border-color: #e0d4d4;
}

.app-card__body {
  min-width: 0;
}

.app-card__title {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.app-card__desc {
  font-size: 0.875rem;
  color: var(--color-ink-muted);
  line-height: 1.5;
  margin-bottom: var(--space-sm);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.app-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.app-card__tag {
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--color-ink-muted);
  background: var(--color-bg-alt);
  padding: 2px var(--space-sm);
  border-radius: var(--radius-sm);
  letter-spacing: 0.02em;
}

.app-card__btn {
  display: inline-flex;
  align-items: center;
  padding: var(--space-sm) var(--space-lg);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-ink);
  background: var(--color-bg-alt);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  transition: background 0.2s, border-color 0.2s;
}

.app-card__btn:hover {
  background: var(--color-surface-alt);
  border-color: var(--color-border-strong);
  color: var(--color-ink);
}

.app-card__reason {
  font-size: 0.75rem;
  color: var(--color-ink-muted);
  background: var(--color-bg-alt);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-sm);
  line-height: 1.4;
}

/* ── Empty State ── */
.empty-state {
  text-align: center;
  padding: var(--space-5xl) var(--space-xl);
  max-width: 400px;
  margin-inline: auto;
}

.empty-state__icon {
  font-size: 1.5rem;
  display: block;
  margin-bottom: var(--space-lg);
  color: var(--color-ink-muted);
  font-weight: 300;
}

.empty-state__title {
  margin-bottom: var(--space-md);
  color: var(--color-ink-muted);
  font-weight: 600;
}

.empty-state__desc {
  font-size: 0.9375rem;
  color: var(--color-ink-muted);
  line-height: 1.6;
}

/* ── Footer ── */
.footer {
  padding-block: var(--space-xl);
}

.footer__inner {
  display: flex;
  justify-content: center;
  align-items: center;
}

.footer__copy {
  font-size: 0.8125rem;
  color: var(--color-ink-muted);
}

/* ── Responsive ── */

/* Tablet */
@media (max-width: 860px) {
  .app-card {
    grid-template-columns: 52px 1fr auto;
    gap: var(--space-md);
    padding: var(--space-md);
  }

  .app-card__icon {
    width: 52px;
    height: 52px;
  }
}

/* Mobile */
@media (max-width: 640px) {
  :root {
    --space-4xl: 48px;
    --space-3xl: 32px;
  }

  .nav__list {
    display: none;
    position: fixed;
    top: 56px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    gap: 0;
    padding: var(--space-lg);
    box-shadow: var(--shadow-md);
  }

  .nav__list--open {
    display: flex;
  }

  .nav__list a {
    display: block;
    padding-block: var(--space-md);
    font-size: 0.9375rem;
  }

  .nav__toggle {
    display: flex;
  }

  .page-header {
    padding-top: 80px;
    padding-bottom: var(--space-xl);
  }

  .tabs {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .tab {
    flex-shrink: 0;
    margin-right: var(--space-lg);
  }

  /* App card stacks on mobile */
  .app-card {
    grid-template-columns: 40px 1fr;
    grid-template-rows: auto auto;
    gap: var(--space-md) var(--space-md);
    padding: var(--space-md);
  }

  .app-card__icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
  }

  .app-card__body {
    grid-column: 2;
    grid-row: 1;
  }

  .app-card__btn {
    grid-column: 1 / -1;
    grid-row: 2;
    justify-self: end;
  }

  .app-card__desc {
    -webkit-line-clamp: 1;
  }

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



  .container {
    padding-inline: var(--space-lg);
  }
}

/* ── Reduced motion ── */
@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;
  }
}