/* ============================================================
   ОБЛАКО КНИГ — app.css
   Design system aligned with landing page (styles.css)
   Sky-blue palette · Inter font · Pill buttons · Soft cards
   ============================================================ */

/* ─── CSS Custom Properties ─────────────────────────────── */
:root {
  /* Sky palette */
  --color-sky-deep:    #0D1B2A;
  --color-sky-dark:    #1A2332;
  --color-sky-mid:     #2C3E55;
  --color-sky-blue:    #2C6B9A;
  --color-cloud-blue:  #7EC8E3;
  --color-cloud-light: #B8DFEE;
  --color-sky-pale:    #EEF6FB;
  --color-white:       #FFFFFF;
  --color-off-white:   #F0F8FF;

  /* Accent */
  --color-btn-primary: #1A3A5C;

  /* Text */
  --color-text-primary:   #1A2332;
  --color-text-secondary: #4A5568;
  --color-text-muted:     #718096;
  --color-text-light:     #A0AEC0;

  /* Semantic */
  --color-earn:    #27AE60;
  --color-spend:   #E74C3C;
  --color-earn-bg: #EAFAF1;
  --color-spend-bg:#FDEDEC;
  --color-coin:    #F5C842;
  --red:           #E53E3E;

  /* Gradients */
  --gradient-sky: linear-gradient(180deg, #EEF6FB 0%, #FFFFFF 100%);

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs:   0.75rem;
  --font-size-sm:   0.875rem;
  --font-size-base: 1rem;
  --font-size-md:   1.125rem;
  --font-size-lg:   1.25rem;
  --font-size-xl:   1.5rem;
  --font-size-2xl:  2rem;
  --font-size-3xl:  2.5rem;

  /* Spacing */
  --space-1:  4px;
  --space-2:  8px;
  --space-3:  12px;
  --space-4:  16px;
  --space-5:  20px;
  --space-6:  24px;
  --space-8:  32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;

  /* Radii */
  --radius-sm:   6px;
  --radius-md:   12px;
  --radius-lg:   20px;
  --radius-xl:   28px;
  --radius-pill: 100px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md:  0 4px 16px rgba(0,0,0,.08), 0 2px 6px rgba(0,0,0,.04);
  --shadow-lg:  0 12px 40px rgba(0,0,0,.10), 0 4px 12px rgba(0,0,0,.06);

  /* Transitions */
  --ease-out:      cubic-bezier(0.16, 1, 0.3, 1);
  --duration-fast: 150ms;
  --duration-base: 250ms;
  --duration-slow: 400ms;

  /* Layout */
  --max-width: 800px;
  --container-padding: 20px;
  --header-h:  64px;
  --bottom-nav-h: 64px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

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

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.55;
  color: var(--color-text-primary);
  background: var(--gradient-sky);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
a:hover { text-decoration: none; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

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

/* ─── Utility ────────────────────────────────────────────── */
.hidden { display: none !important; }
.visually-hidden {
  position: absolute !important;
  height: 1px; width: 1px;
  overflow: hidden; clip: rect(1px,1px,1px,1px);
  white-space: nowrap; border: 0; padding: 0; margin: -1px;
}
.muted { color: var(--color-text-muted); }
.small { font-size: var(--font-size-sm); }

/* ─── App Shell ──────────────────────────────────────────── */
.app-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

/* ─── Header ─────────────────────────────────────────────── */
.app-header,
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(44,107,154,.1);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--container-padding);
  max-width: 100%;
  transition: box-shadow var(--duration-base), transform var(--duration-base) var(--ease-out);
}

.app-header.scrolled,
.site-header.scrolled {
  box-shadow: 0 2px 20px rgba(0,0,0,.08);
}

/* On mobile, slide the fixed header out of the way when scrolling down. */
@media (max-width: 768px) {
  .app-header.header-hidden { transform: translateY(-100%); }
}

.header-copy { display: flex; align-items: center; }
.brand-link {
  font-size: var(--font-size-lg);
  font-weight: 800;
  color: var(--color-sky-dark);
  letter-spacing: -0.02em;
}
.brand-link:hover { color: var(--color-sky-blue); }
.brand-link { display: inline-flex; align-items: center; }
.brand-logo { height: 32px; width: auto; display: block; }

.header-brand { display: flex; align-items: center; gap: var(--space-3); }
.header-brand img { height: 36px; width: auto; display: block; }

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

.header-nav { display: flex; gap: var(--space-2); align-items: center; }

.icon-button {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  transition: background var(--duration-fast), color var(--duration-fast);
  font-size: var(--font-size-sm);
}
.icon-button:hover {
  background: var(--color-sky-pale);
  color: var(--color-sky-blue);
}

.icon-button .badge {
  position: absolute;
  top: 2px;
  right: 2px;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  border-radius: var(--radius-full);
  background: var(--red);
  color: white;
  font-size: 11px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.ghost-link {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-sky-blue);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-pill);
  transition: background var(--duration-fast);
}
.ghost-link:hover { background: var(--color-sky-pale); }

/* Burger */
.burger-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  background: var(--color-white);
  border: 1px solid rgba(44,107,154,.12);
}
.burger-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-sky-dark);
  border-radius: 2px;
  transition: transform var(--duration-base) var(--ease-out), opacity var(--duration-fast);
}

/* Mobile menu */
#mobile-menu {
  position: fixed;
  inset: 0;
  display: none;
  align-items: flex-start;
  justify-content: flex-end;
  z-index: 9999;
  background: rgba(13,27,42,0.35);
  padding: var(--space-6);
}
#mobile-menu .panel {
  width: 320px;
  max-width: 92%;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-lg);
}
#mobile-menu.open { display: flex; }

/* ─── Main Content ───────────────────────────────────────── */
.page {
  flex: 1;
  max-width: var(--max-width);
  margin-inline: auto;
  width: 100%;
  padding: var(--space-5) var(--container-padding) calc(var(--bottom-nav-h) + var(--space-8));
}

/* ─── Stack (vertical spacing) ───────────────────────────── */
.stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}
.stack.compact-gap { gap: var(--space-3); }
.stack-sm { display: flex; flex-direction: column; gap: var(--space-2); }

/* ─── Nav Link ───────────────────────────────────────────── */
.nav-link {
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  border-radius: var(--radius-sm);
  transition: color var(--duration-fast), background var(--duration-fast);
}
.nav-link:hover {
  color: var(--color-sky-blue);
  background: var(--color-sky-pale);
}
.nav-link.active {
  color: var(--color-sky-blue);
  font-weight: 600;
}

/* ─── Buttons ────────────────────────────────────────────── */
.button, .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 12px 24px;
  border-radius: var(--radius-pill);
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
  cursor: pointer;
  border: none;
  transition: transform var(--duration-base) var(--ease-out),
              box-shadow var(--duration-base) var(--ease-out),
              background-color var(--duration-fast),
              color var(--duration-fast);
  position: relative;
  overflow: hidden;
  text-decoration: none;
}
.button:hover, .btn:hover { transform: translateY(-1px); }
.button:active, .btn:active { transform: scale(.97); }

.button.primary, .btn.primary,
.button:not(.secondary):not(.ghost):not(.btn-secondary):not(.btn-outline-white):not(.btn-white) {
  background: var(--color-btn-primary);
  color: var(--color-white);
  box-shadow: 0 4px 16px rgba(26,58,92,.25);
}
.button.primary:hover, .btn.primary:hover {
  background: #0F2A4A;
  box-shadow: 0 8px 24px rgba(26,58,92,.35);
}

.button.secondary, .btn.secondary {
  background: var(--color-sky-pale);
  color: var(--color-sky-blue);
  border: 1.5px solid var(--color-cloud-light);
}
.button.secondary:hover, .btn.secondary:hover {
  background: var(--color-cloud-light);
  border-color: var(--color-sky-blue);
}

.button.ghost, .btn.ghost {
  background: transparent;
  color: var(--color-sky-blue);
  border: 1.5px solid rgba(44,107,154,.2);
}
.button.ghost:hover, .btn.ghost:hover {
  background: var(--color-sky-pale);
  border-color: var(--color-cloud-blue);
}

.button.small, .btn.small {
  padding: 8px 16px;
  font-size: var(--font-size-xs);
}

.btn-primary {
  background: var(--color-btn-primary);
  color: var(--color-white);
  box-shadow: 0 4px 16px rgba(26,58,92,.25);
}
.btn-primary:hover {
  background: #0F2A4A;
  box-shadow: 0 8px 24px rgba(26,58,92,.35);
}

.btn-secondary {
  background: var(--color-sky-pale);
  color: var(--color-sky-blue);
  border: 1.5px solid var(--color-cloud-light);
}
.btn-secondary:hover {
  background: var(--color-cloud-light);
  border-color: var(--color-sky-blue);
}

.btn-white {
  background: var(--color-white);
  color: var(--color-sky-blue);
  box-shadow: var(--shadow-md);
}
.btn-outline-white {
  background: transparent;
  color: var(--color-white);
  border: 1.5px solid rgba(255,255,255,.5);
}

.btn-sm { padding: 8px 16px; font-size: var(--font-size-xs); }

.button-row {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  align-items: center;
}

/* ripple (JS) */
.ripple {
  position: absolute;
  border-radius: 50%;
  transform: scale(0);
  background: rgba(255,255,255,0.18);
  pointer-events: none;
  animation: ripple 600ms linear;
}
@keyframes ripple { to { transform: scale(2); opacity: 0; } }

/* ─── Cards ──────────────────────────────────────────────── */
.card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(44,107,154,.08);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform var(--duration-base) var(--ease-out),
              box-shadow var(--duration-base);
}
.card:hover {
  box-shadow: var(--shadow-md);
}
.card-padded {
  padding: var(--space-5);
}

/* ─── Section Headers ────────────────────────────────────── */
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-4);
}
.section-head.compact { margin-bottom: var(--space-2); }

.section-kicker {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-cloud-blue);
  margin-bottom: var(--space-1);
}

h1 {
  font-size: var(--font-size-xl);
  font-weight: 800;
  color: var(--color-sky-dark);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h2 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-sky-dark);
  line-height: 1.25;
}

h3 {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--color-sky-dark);
}

/* ─── Notices / Alerts ───────────────────────────────────── */
.notice {
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  line-height: 1.5;
}
.notice.success {
  background: var(--color-earn-bg);
  color: #1D8348;
  border: 1px solid rgba(39,174,96,.2);
}
.notice.error {
  background: var(--color-spend-bg);
  color: #922B21;
  border: 1px solid rgba(231,76,60,.2);
}

/* ─── Form Fields ────────────────────────────────────────── */
.field {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.field > span {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-secondary);
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="url"],
input[type="search"],
input[type="number"],
input[type="date"],
input[type="password"],
textarea,
select {
  width: 100%;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  border: 1.5px solid rgba(44,107,154,.15);
  background: var(--color-white);
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  color: var(--color-text-primary);
  transition: border-color var(--duration-fast), box-shadow var(--duration-fast);
  line-height: 1.5;
}
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--color-sky-blue);
  box-shadow: 0 0 0 3px rgba(44,107,154,.12);
}

input::placeholder, textarea::placeholder {
  color: var(--color-text-light);
}

/* iOS date inputs have an intrinsic min-width that overflows narrow flex/grid
   containers — normalize them so they respect the container box. */
input[type="date"] {
  -webkit-appearance: none;
  appearance: none;
  min-width: 0;
  max-width: 100%;
  /* Empty date inputs collapse on WebKit — reserve the filled-state height. */
  min-height: calc(1.5em + 23px);
}

input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--color-sky-blue);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

input[type="file"] {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.filter-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-3);
  align-items: end;
}
.filter-grid .field { min-width: 0; }
.filter-grid .button,
.filter-grid .btn { align-self: end; }

/* ─── Catalog filter (adaptive rows) ─────────────────────── */
.catalog-filter {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.catalog-filter .field-full { width: 100%; }
.catalog-filter .filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}
.catalog-filter .filter-row .field {
  flex: 1 1 0;
  min-width: 140px;
}
.catalog-filter .filter-row .field-check {
  flex-direction: row;
  align-items: center;
  gap: var(--space-2);
  flex: 0 1 auto;
  align-self: flex-end;
  padding-bottom: 10px;
  white-space: nowrap;
  min-width: unset;
}
.catalog-filter .field-check input { width: auto; }
.catalog-filter .field-check > span {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-secondary);
}
.catalog-filter .filter-actions {
  display: flex;
  gap: var(--space-3);
}
.catalog-filter .filter-actions .button {
  flex: 1 1 0;
  text-align: center;
}
@media (max-width: 560px) {
  .catalog-filter .filter-row .field { flex: 1 1 100%; min-width: unset; }
  .catalog-filter .filter-row .field-check { align-self: flex-start; padding-bottom: 0; }
}

/* Dev-code block */
.dev-code {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  background: var(--color-sky-pale);
  border: 1px solid rgba(44,107,154,.1);
  font-size: var(--font-size-sm);
  margin: var(--space-3) 0;
}
.dev-code span { color: var(--color-text-muted); }
.dev-code strong { color: var(--color-sky-blue); font-weight: 700; }

/* ─── Chips / Tags ───────────────────────────────────────── */
.chip-row {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  align-items: center;
}

.chip {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  font-size: 11px;
  font-weight: 600;
  background: var(--color-sky-pale);
  color: var(--color-sky-blue);
  white-space: nowrap;
  text-decoration: none;
  transition: background var(--duration-fast);
  line-height: 1.5;
}
.chip-muted {
  background: rgba(44,107,154,.06);
  color: var(--color-text-muted);
}
.chip-rating {
  background: #FEF9E7;
  color: #9A7D0A;
}
.chip-danger {
  background: var(--color-spend-bg);
  color: #922B21;
}
.chip-active {
  background: var(--color-sky-blue);
  color: var(--color-white);
}

/* ─── Item Cards (list) ──────────────────────────────────── */
.list-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.item-card {
  cursor: pointer;
}
.item-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.item-card-body {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-4);
  text-decoration: none;
  color: inherit;
}

.item-visual {
  width: 80px;
  height: 100px;
  flex-shrink: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-sky-pale);
  display: flex;
  align-items: center;
  justify-content: center;
}
.item-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.item-visual.placeholder {
  background: linear-gradient(135deg, var(--color-sky-pale) 0%, var(--color-cloud-light) 100%);
}
.item-visual.placeholder span {
  font-size: var(--font-size-xs);
  color: var(--color-sky-blue);
  font-weight: 600;
  text-align: center;
  padding: var(--space-2);
}

.item-copy {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  flex: 1;
  min-width: 0;
}
.item-copy h2 {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--color-sky-dark);
  margin: 0;
}

/* ─── Detail Card ────────────────────────────────────────── */
.detail-card { overflow: hidden; }
.detail-gallery {
  width: 100%;
  height: 240px;
  background: linear-gradient(135deg, var(--color-sky-pale) 0%, var(--color-cloud-light) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.detail-gallery img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.detail-gallery.placeholder span {
  font-size: var(--font-size-lg);
  color: var(--color-sky-blue);
  font-weight: 600;
}

/* ─── Info Grid ──────────────────────────────────────────── */
.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: var(--space-3);
}
.info-grid > div {
  padding: var(--space-3);
  border-radius: var(--radius-md);
  background: var(--color-sky-pale);
  border: 1px solid rgba(44,107,154,.06);
}
.info-label {
  display: block;
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 2px;
}
.info-grid strong {
  font-size: var(--font-size-base);
  color: var(--color-sky-dark);
}

/* ─── Compact fact list (label — value) ──────────────────── */
.detail-facts {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin: 0;
}
.detail-fact {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
}
.detail-fact dt {
  flex: 0 0 auto;
  min-width: 96px;
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}
.detail-fact dd {
  margin: 0;
  font-weight: 600;
  color: var(--color-sky-dark);
}

/* ─── Availability in libraries ──────────────────────────── */
.availability-block h2 { margin-bottom: var(--space-2); }
.availability-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.availability-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  background: var(--color-sky-pale);
  border: 1px solid rgba(44,107,154,.06);
}
.availability-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.availability-info a { font-weight: 600; }
.availability-name-row {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}
.availability-item form { margin: 0; flex: 0 0 auto; }

/* ─── Profile Hero ───────────────────────────────────────── */
.profile-hero {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-6);
  background: var(--color-white);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(44,107,154,.08);
  box-shadow: var(--shadow-sm);
}

.metric-pill {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-lg);
  background: var(--color-sky-pale);
  border: 1px solid rgba(44,107,154,.1);
}
.metric-pill span {
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.metric-pill strong {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  color: var(--color-sky-blue);
  line-height: 1;
}

/* ─── Feature Grid ───────────────────────────────────────── */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: var(--space-3);
}

.feature-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  border: 1px solid rgba(44,107,154,.08);
  box-shadow: var(--shadow-sm);
  transition: transform var(--duration-base) var(--ease-out), box-shadow var(--duration-base);
}
.feature-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.feature-card h2 {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  color: var(--color-sky-blue);
  line-height: 1.1;
}

/* ─── Reviews ────────────────────────────────────────────── */
.review-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.review-card {
  padding: var(--space-4);
  border-radius: var(--radius-md);
  background: var(--color-sky-pale);
  border: 1px solid rgba(44,107,154,.06);
}

.review-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
}

.review-form {
  padding-top: var(--space-3);
  border-top: 1px solid rgba(44,107,154,.08);
}

/* ─── Transaction Row ────────────────────────────────────── */
.transaction-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.positive { color: var(--color-earn); }
.negative { color: var(--color-spend); }

/* ─── Admin Row ──────────────────────────────────────────── */
.admin-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-3) 0;
  border-bottom: 1px solid rgba(44,107,154,.06);
  font-size: var(--font-size-sm);
}
.admin-row:last-child { border-bottom: none; }
.admin-row span { color: var(--color-text-muted); }
.admin-row strong { color: var(--color-sky-dark); }

/* ─── Inline Note ────────────────────────────────────────── */
.inline-note {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  background: var(--color-sky-pale);
  border: 1px solid rgba(44,107,154,.1);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

/* ─── Empty State ────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: var(--space-10) var(--space-6);
  color: var(--color-text-muted);
}
.empty-state.compact { padding: var(--space-5) var(--space-4); }
.empty-state strong {
  display: block;
  margin-bottom: var(--space-2);
  color: var(--color-text-secondary);
}
.empty-state p { font-size: var(--font-size-sm); }
.empty-state a { color: var(--color-sky-blue); font-weight: 600; }

/* ─── Notification Card ──────────────────────────────────── */
.notification-card {
  display: block;
  transition: transform var(--duration-base) var(--ease-out), box-shadow var(--duration-base);
}
.notification-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* ─── Chat ───────────────────────────────────────────────── */
.chat-feed {
  max-height: 400px;
  overflow-y: auto;
  padding: var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  background: var(--color-sky-pale);
  border-radius: var(--radius-md);
}

[data-chat-feed] {
  max-height: 400px;
  overflow-y: auto;
  padding: var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  background: var(--color-sky-pale);
  border-radius: var(--radius-md);
}

.chat-form {
  display: flex;
  gap: var(--space-3);
  align-items: flex-end;
}
.chat-form textarea {
  flex: 1;
  min-height: 44px;
  resize: vertical;
}

.message-bubble {
  display: inline-block;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  background: var(--color-white);
  border: 1px solid rgba(44,107,154,.08);
  max-width: 78%;
  word-break: break-word;
  font-size: var(--font-size-sm);
}
.message-bubble.mine {
  margin-left: auto;
  background: var(--color-sky-pale);
  border-color: rgba(44,107,154,.15);
  border-radius: var(--radius-lg) var(--radius-lg) var(--radius-sm) var(--radius-lg);
}

/* ─── Data Table ─────────────────────────────────────────── */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
}
.data-table th {
  text-align: left;
  padding: var(--space-3) var(--space-3);
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: var(--font-size-xs);
  border-bottom: 2px solid rgba(44,107,154,.12);
}
.data-table td {
  padding: var(--space-3) var(--space-3);
  border-bottom: 1px solid rgba(44,107,154,.06);
  color: var(--color-text-primary);
}
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: var(--color-sky-pale); }

/* ─── Pagination ─────────────────────────────────────────── */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  padding: var(--space-4) 0;
}

/* ─── Floating Action Button ─────────────────────────────── */
.floating-action {
  position: fixed;
  right: var(--space-5);
  bottom: calc(var(--bottom-nav-h) + var(--space-5));
  width: 52px;
  height: 52px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-btn-primary);
  color: var(--color-white);
  font-size: 24px;
  font-weight: 300;
  box-shadow: 0 8px 32px rgba(26,58,92,.35);
  z-index: 50;
  transition: transform var(--duration-base) var(--ease-out), box-shadow var(--duration-base);
  text-decoration: none;
}
.floating-action:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(26,58,92,.45);
}

/* ─── Corner add button (top-right of a header card) ─────── */
.has-corner-action { position: relative; }
.has-corner-action h1 { padding-right: 56px; }
.corner-add {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-btn-primary);
  color: var(--color-white);
  font-size: 26px;
  font-weight: 300;
  line-height: 1;
  box-shadow: 0 4px 16px rgba(26,58,92,.25);
  text-decoration: none;
  transition: transform var(--duration-base) var(--ease-out), background-color var(--duration-fast);
  z-index: 2;
}
.corner-add:hover { transform: translateY(-2px); background: #0F2A4A; }
.corner-add.active { background: #0F2A4A; }

/* ─── Edit (pencil) icon on list cards ───────────────────── */
.item-card.has-edit-icon { position: relative; }
.item-card.has-edit-icon .item-card-body { padding-right: 52px; }
.card-edit-icon {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-sky-pale);
  color: var(--color-sky-blue);
  text-decoration: none;
  transition: background var(--duration-fast);
  z-index: 2;
}
.card-edit-icon:hover { background: var(--color-cloud-light); }

/* ─── Lending action tabs ────────────────────────────────── */
.lending-tabs {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin: var(--space-4) 0;
}
.lending-tabs .lending-tab {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: var(--font-size-sm);
  line-height: 1;
  white-space: nowrap;
  background: var(--color-sky-pale);
  color: var(--color-sky-blue);
  border: 1.5px solid var(--color-cloud-light);
  text-decoration: none;
  transition: background var(--duration-fast), color var(--duration-fast);
}
.lending-tabs .lending-tab:hover {
  background: var(--color-cloud-light);
  border-color: var(--color-sky-blue);
}
.lending-tabs .lending-tab.active {
  background: var(--color-btn-primary);
  color: var(--color-white);
  border-color: var(--color-btn-primary);
}

/* ─── Bottom Navigation ──────────────────────────────────── */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 80;
  height: var(--bottom-nav-h);
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-top: 1px solid rgba(44,107,154,.1);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  padding: 0 var(--space-4);
  max-width: 100%;
}

.bottom-link {
  flex: 1;
  max-width: 100px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  padding: var(--space-2) var(--space-1);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  font-size: var(--font-size-xs);
  font-weight: 500;
  text-decoration: none;
  transition: color var(--duration-fast), background var(--duration-fast);
  position: relative;
}
.bottom-link:hover {
  color: var(--color-sky-blue);
  background: rgba(44,107,154,.05);
}

.bottom-link.active {
  color: var(--color-sky-blue);
  font-weight: 700;
}
.bottom-link.active::after {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 3px;
  border-radius: 0 0 3px 3px;
  background: var(--color-sky-blue);
}

.bottom-label {
  font-size: var(--font-size-xs);
  line-height: 1;
}

/* ─── Hero (landing-style, in-app) ───────────────────────── */
.hero {
  position: relative;
  padding: var(--space-12) 0;
  overflow: hidden;
  background: linear-gradient(165deg, rgba(13,27,42,0.96) 0%, rgba(26,58,92,0.88) 40%, rgba(44,107,154,0.60) 75%, rgba(74,144,184,0.18) 100%);
}
.hero .hero-inner {
  display: flex;
  gap: var(--space-8);
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin-inline: auto;
  padding: 0 var(--container-padding);
}
.hero .hero-content { max-width: 640px; }
.hero h1 { font-size: var(--font-size-3xl); color: var(--color-white); margin-bottom: var(--space-3); }
.hero p.lead { color: rgba(255,255,255,.80); margin-bottom: var(--space-5); }
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.08;
  pointer-events: none;
}
.hero .hero-visual {
  flex: 0 1 440px;
  position: relative;
  z-index: 1;
}
.hero .hero-visual img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg, 16px);
  box-shadow: 0 18px 48px rgba(13,27,42,0.35);
  display: block;
}
@media (max-width: 768px) {
  .hero .hero-visual { display: none; }
}

/* ─── Auth / onboarding hero (fullscreen background) ─────── */
.page.auth-hero {
  max-width: none;
  min-height: calc(100vh - 64px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: var(--space-8) var(--container-padding) calc(var(--bottom-nav-h, 0px) + var(--space-8));
  background:
    linear-gradient(165deg, rgba(13,27,42,0.86) 0%, rgba(26,58,92,0.78) 45%, rgba(44,107,154,0.60) 100%),
    url("../img/main.jpg") center / cover no-repeat;
}
.page.auth-hero .stack {
  width: 100%;
  max-width: 440px;
}
.page.auth-hero .section-kicker { color: var(--color-sky-blue); }

/* ─── Responsive ─────────────────────────────────────────── */

/* Tablet */
@media (max-width: 768px) {
  :root {
    --max-width: 100%;
    --container-padding: 16px;
  }

  .header-nav { display: none; }
  .burger-btn { display: flex; }

  h1 { font-size: var(--font-size-lg); }
  h2 { font-size: var(--font-size-base); }

  .info-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-grid { grid-template-columns: 1fr; }
  .profile-hero { flex-direction: column; }
  .filter-grid { grid-template-columns: 1fr; }
  .item-visual { width: 64px; height: 80px; }
  .detail-gallery { height: 200px; }
}

/* Small mobile */
@media (max-width: 480px) {
  :root {
    --container-padding: 12px;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .info-grid {
    grid-template-columns: 1fr;
  }

  .button-row {
    flex-direction: column;
  }
  .button-row .button,
  .button-row .btn {
    width: 100%;
    text-align: center;
  }

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

/* ─── Library desktop layout (≥1024px) ───────────────────── */
.library-layout {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}
.item-card.is-selected,
.card.is-selected {
  background: var(--color-sky-pale);
  border-color: var(--color-sky-blue);
}

@media (max-width: 1023px) {
  .library-layout.mode-detail .layout-panel,
  .library-layout.mode-detail .layout-list,
  .desktop-only { display: none; }
}

@media (min-width: 1024px) {
  .page.library-desktop { max-width: 1400px; }

  .library-layout {
    display: grid;
    grid-template-columns: 340px minmax(320px, 1fr) minmax(360px, 1.2fr);
    gap: var(--space-5);
    align-items: start;
  }
  .layout-panel {
    grid-column: 1;
    grid-row: 1;
    position: sticky;
    top: calc(var(--header-h) + var(--space-4));
    max-height: calc(100vh - var(--header-h) - 2 * var(--space-4));
    overflow-y: auto;
  }
  .layout-list { grid-column: 2; }
  .layout-detail { grid-column: 3; }
  .library-layout.no-detail .layout-list,
  .library-layout .layout-main { grid-column: 2 / -1; }
  .layout-panel .filter-grid { grid-template-columns: 1fr; }
  .mobile-only { display: none; }

  /* Bottom nav becomes a vertical rail on the left edge. */
  .bottom-nav {
    top: var(--header-h);
    bottom: 0;
    left: 0;
    right: auto;
    width: var(--bottom-nav-h);
    height: auto;
    flex-direction: column;
    justify-content: flex-start;
    gap: var(--space-2);
    padding: var(--space-4) 0;
    border-top: none;
    border-right: 1px solid rgba(44,107,154,.1);
  }
  .bottom-link {
    flex: 0 0 auto;
    width: 100%;
    max-width: none;
    border-radius: 0;
  }
  .bottom-link.active::after {
    top: 50%;
    left: 0;
    transform: translateY(-50%);
    width: 3px;
    height: 24px;
    border-radius: 0 3px 3px 0;
  }
  .app-shell:has(.bottom-nav) .page {
    padding-left: calc(var(--bottom-nav-h) + var(--space-5));
    padding-bottom: var(--space-8);
  }
  .floating-action { bottom: var(--space-5); }
}

/* ─── Print ──────────────────────────────────────────────── */
@media print {
  .app-header, .bottom-nav, .floating-action { display: none; }
  body { color: black; background: white; }
  .card { box-shadow: none; border: 1px solid #ddd; }
}

/* ─── Landing page: hero badge + CTA row ─────────────────── */
.hero-pill {
  display: inline-flex;
  align-items: center;
  padding: 4px 14px;
  background: rgba(126,200,227,.18);
  border: 1px solid rgba(126,200,227,.35);
  border-radius: var(--radius-pill);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-cloud-blue);
  margin-bottom: var(--space-4);
}

.hero-copy {
  font-size: var(--font-size-md);
  color: rgba(255,255,255,.80);
  line-height: 1.65;
  margin: 0 0 var(--space-6);
  max-width: 520px;
}

.hero-actions {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; }
}