/* ==========================================================================
   THE PUBLIC APIS CHRONICLE — VINTAGE STYLESHEET
   Aesthetics: 1990s Antique Newspaper / Aged Parchment / Library Archive
   ========================================================================== */

:root {
  /* Vintage Paper & Parchment Palette (Daylight Theme) */
  --paper-page: #f4ecdc;
  --paper-card: #faf5ea;
  --paper-card-featured: #fcf6eb;
  --paper-slot: #ede2cb;
  --paper-label: #f0e6d2;
  --paper-input: #fdfaf2;
  --paper-dropdown: #faf4e6;
  --paper-option-hover: #ede0c6;
  --paper-option-selected: #e2d2b4;

  /* Ink & Typography Palette */
  --ink-primary: #1f1610;    /* Deep walnut black ink */
  --ink-secondary: #4a3b2c;  /* Warm sepia ink */
  --ink-muted: #786552;      /* Aged pencil / faded ink */
  --ink-border: #6d5843;     /* Hand-ruled ink edge */
  --ink-border-dark: #3e2d1d;/* Heavy woodblock / press border */
  --ink-rule: #826e57;
  --border-dash: #ded0b8;

  /* Vintage Rubber Stamp Accents */
  --stamp-red: #8f2619;      /* Sealing wax red */
  --stamp-red-bg: #fae9e6;
  --stamp-green: #255220;    /* Archival forest ink */
  --stamp-green-bg: #eaf3e8;
  --stamp-amber: #754614;    /* Tobacco ink */
  --stamp-amber-bg: #f7eedf;
  --stamp-purple: #522d66;   /* Royal archival purple */
  --stamp-purple-bg: #f2eaf5;

  /* Shadows & Depth */
  --card-shadow: 2px 3px 0px rgba(60, 45, 30, 0.12), 4px 6px 14px rgba(45, 30, 15, 0.08);
  --card-shadow-hover: 3px 5px 0px rgba(60, 45, 30, 0.18), 6px 10px 18px rgba(45, 30, 15, 0.12);
  --controls-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.6), 2px 3px 0px rgba(60, 45, 30, 0.12), 0 8px 20px rgba(50, 35, 20, 0.06);
  --input-inner-shadow: inset 1px 2px 4px rgba(70, 50, 30, 0.1);
  --body-gradient: radial-gradient(ellipse at 50% 12%, #faf4e6 0%, #f3ebd7 55%, #e6d8bc 100%);
  --vignette-shadow: inset 0 0 90px rgba(80, 55, 30, 0.15);
  --grain-opacity: 0.045;

  /* Typography Stacks */
  --font-serif-heading: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-serif-body: 'Lora', 'Baskerville', 'Times New Roman', Georgia, serif;
  --font-typewriter: 'Courier Prime', 'Courier New', Courier, monospace;
}

/* ==========================================================================
   Midnight Archive Theme (Dark Parchment / Antique Slate)
   ========================================================================== */
[data-theme="dark"] {
  --paper-page: #151311;
  --paper-card: #1d1915;
  --paper-card-featured: #241d18;
  --paper-slot: #1a1612;
  --paper-label: #221c17;
  --paper-input: #181410;
  --paper-dropdown: #1e1914;
  --paper-option-hover: #29221b;
  --paper-option-selected: #362c23;

  /* Warm Antique Ivory & Linen Ink on Dark Parchment */
  --ink-primary: #f5eedb;    /* Warm ivory ink */
  --ink-secondary: #cec3ad;  /* Antique linen */
  --ink-muted: #968975;      /* Aged parchment pencil */
  --ink-border: #4a3c2e;     /* Deep walnut leather edge */
  --ink-border-dark: #78624d;/* Brass / warm press border */
  --ink-rule: #3d3126;
  --border-dash: #382c20;

  /* Vintage Rubber Stamp Accents (Dark Mode Adjusted) */
  --stamp-red: #e65d4c;      /* Bright sealing wax */
  --stamp-red-bg: #2e1717;
  --stamp-green: #52ad48;    /* Muted emerald ink */
  --stamp-green-bg: #152614;
  --stamp-amber: #e09f4f;    /* Warm amber tobacco */
  --stamp-amber-bg: #2b1d0f;
  --stamp-purple: #c085de;   /* Soft archival purple */
  --stamp-purple-bg: #27152e;

  /* Shadows & Effects for Dark Mode */
  --card-shadow: 2px 3px 0px rgba(0, 0, 0, 0.5), 4px 6px 14px rgba(0, 0, 0, 0.35);
  --card-shadow-hover: 3px 5px 0px rgba(0, 0, 0, 0.7), 6px 10px 20px rgba(0, 0, 0, 0.45);
  --controls-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04), 2px 3px 0px rgba(0, 0, 0, 0.5), 0 8px 24px rgba(0, 0, 0, 0.4);
  --input-inner-shadow: inset 1px 2px 4px rgba(0, 0, 0, 0.45);
  --body-gradient: radial-gradient(ellipse at 50% 12%, #1e1a16 0%, #151311 55%, #0c0b09 100%);
  --vignette-shadow: inset 0 0 100px rgba(0, 0, 0, 0.75);
  --grain-opacity: 0.055;
}

/* ==========================================================================
   Global Reset & Mobile UX
   ========================================================================== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent; /* Remove mobile blue highlight rectangle */
}

html {
  scroll-behavior: smooth;
}

/* Procedural Paper Grain & Fiber Overlay */
body::before {
  content: "";
  position: fixed;
  top: 0; left: 0;
  width: 100vw; height: 100vh;
  pointer-events: none;
  z-index: 9999;
  opacity: var(--grain-opacity);
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 250 250' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

body {
  font-family: var(--font-serif-body);
  background-color: var(--paper-page);
  background-image: var(--body-gradient);
  color: var(--ink-primary);
  min-height: 100vh;
  padding: 2.25rem 1.5rem 5rem 1.5rem;
  line-height: 1.6;
  box-shadow: var(--vignette-shadow);
  -webkit-font-smoothing: subpixel-antialiased;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
}

button, a, input, select, .custom-select-trigger, .custom-select-option, .tab-btn, .fab-btn {
  -webkit-tap-highlight-color: transparent;
  outline: none;
  touch-action: manipulation;
}

/* ==========================================================================
   Vintage Archival Masthead
   ========================================================================== */
.masthead {
  text-align: center;
  max-width: 980px;
  margin: 0 auto 2.5rem auto;
  border-top: 3px double var(--ink-border-dark);
  border-bottom: 3px double var(--ink-border-dark);
  padding: 1.25rem 0 1.5rem 0;
  position: relative;
}
.masthead-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-typewriter);
  font-size: 0.775rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-secondary);
  border-bottom: 1px solid var(--ink-border);
  padding-bottom: 0.5rem;
  margin-bottom: 1.25rem;
  gap: 1rem;
}
.masthead-vol {
  letter-spacing: 0.08em;
  white-space: nowrap;
}
.masthead-center-tag {
  letter-spacing: 0.1em;
  text-align: center;
  flex: 1;
}
.masthead-edition {
  letter-spacing: 0.08em;
  text-align: right;
  white-space: nowrap;
}

.masthead-title {
  font-family: var(--font-serif-heading);
  font-size: clamp(2.2rem, 5.5vw, 3.8rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--ink-primary);
  line-height: 1.1;
  margin-bottom: 0.65rem;
  text-transform: uppercase;
}
.masthead-deck {
  font-family: var(--font-serif-body);
  font-style: italic;
  font-size: 1.1rem;
  color: var(--ink-secondary);
  max-width: 780px;
  margin: 0 auto 1.2rem auto;
  line-height: 1.55;
}
.masthead-ornament {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  color: var(--ink-muted);
}
.rule-line {
  height: 1px;
  background: var(--ink-border);
  flex: 1;
  max-width: 140px;
}
.ornament-diamond {
  font-size: 0.85rem;
  letter-spacing: 0.25em;
  color: var(--ink-border-dark);
}

/* Hugeicons in vintage ink styling */
.hugeicon {
  display: inline-block;
  vertical-align: middle;
  flex-shrink: 0;
  stroke-width: 1.6;
}

/* Quick action buttons & cache bar - kept in DOM for coding agents, hidden from UI */
.quick-actions,
.cache-indicator {
  display: none !important;
}

/* ==========================================================================
   Controls ("Library Card Catalog Drawer")
   ========================================================================== */
.controls {
  background: var(--paper-slot);
  border: 1.5px solid var(--ink-border);
  border-radius: 4px;
  padding: 1.5rem;
  box-shadow: var(--controls-shadow);
  margin-bottom: 2rem;
  position: relative;
}
.controls::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 10px; right: 10px;
  height: 2px;
  background: var(--ink-rule);
  opacity: 0.35;
}
.search-row {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: stretch;
  margin-bottom: 1.25rem;
}
.search-wrapper {
  flex: 2;
  min-width: 280px;
  position: relative;
}
.search-input {
  width: 100%;
  height: 100%;
  min-height: 48px;
  padding: 0.85rem 1rem 0.85rem 2.85rem;
  border-radius: 3px;
  border: 1.5px solid var(--ink-border);
  background: var(--paper-input);
  color: var(--ink-primary);
  font-family: var(--font-typewriter);
  font-size: 0.95rem;
  outline: none;
  box-shadow: var(--input-inner-shadow);
  transition: border-color 0.15s, box-shadow 0.15s;
}
.search-input:focus {
  border-color: var(--ink-border-dark);
  box-shadow: var(--input-inner-shadow), 0 0 0 2px rgba(120, 98, 77, 0.25);
}
.search-icon {
  position: absolute;
  left: 0.95rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--ink-secondary);
  pointer-events: none;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ==========================================================================
   Custom Dropdown ("Archival Classification Index")
   ========================================================================== */
.custom-select-wrapper {
  flex: 1;
  min-width: 250px;
  position: relative;
  user-select: none;
}
.custom-select-trigger {
  width: 100%;
  height: 100%;
  min-height: 48px;
  padding: 0.85rem 1.15rem;
  border-radius: 3px;
  border: 1.5px solid var(--ink-border);
  background: var(--paper-input);
  color: var(--ink-primary);
  font-family: var(--font-serif-heading);
  font-size: 1rem;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
  gap: 0.5rem;
  box-shadow: 1px 2px 0px var(--ink-border);
}
.custom-select-trigger:focus,
.custom-select-wrapper.open .custom-select-trigger {
  border-color: var(--ink-border-dark);
  box-shadow: 0 0 0 2px rgba(120, 98, 77, 0.25);
}
.custom-select-label {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  text-align: left;
}
.custom-select-arrow {
  color: var(--ink-border-dark);
  transition: transform 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}
.custom-select-wrapper.open .custom-select-arrow {
  transform: rotate(180deg);
}
.custom-select-dropdown {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  background: var(--paper-dropdown);
  border: 2px solid var(--ink-border-dark);
  border-radius: 3px;
  box-shadow: var(--card-shadow-hover);
  z-index: 1000;
  overflow: hidden;
  animation: dropdownFadeIn 0.15s ease-out;
}
@keyframes dropdownFadeIn {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}
.custom-select-search-box {
  padding: 0.65rem;
  border-bottom: 1.5px solid var(--ink-border);
  background: var(--paper-slot);
}
.custom-select-search-input {
  width: 100%;
  padding: 0.55rem 0.75rem;
  background: var(--paper-input);
  border: 1px solid var(--ink-border);
  border-radius: 2px;
  color: var(--ink-primary);
  font-family: var(--font-typewriter);
  font-size: 0.85rem;
  outline: none;
}
.custom-select-search-input:focus {
  border-color: var(--ink-border-dark);
}
.custom-select-options {
  max-height: 330px;
  overflow-y: auto;
  padding: 0.35rem 0;
}
.custom-select-options::-webkit-scrollbar {
  width: 7px;
}
.custom-select-options::-webkit-scrollbar-thumb {
  background: var(--ink-border);
  border-radius: 2px;
}
.custom-select-option {
  padding: 0.6rem 1.1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--ink-primary);
  font-family: var(--font-serif-body);
  font-size: 0.92rem;
  cursor: pointer;
  border-bottom: 1px dotted var(--border-dash);
  transition: background 0.12s;
}
.custom-select-option:last-child {
  border-bottom: none;
}
.custom-select-option:hover {
  background: var(--paper-option-hover);
}
.custom-select-option.selected {
  background: var(--paper-option-selected);
  font-weight: 700;
}
.custom-select-option-count {
  font-family: var(--font-typewriter);
  font-size: 0.75rem;
  background: var(--paper-label);
  border: 1px solid var(--ink-border);
  padding: 0.15rem 0.5rem;
  border-radius: 2px;
  color: var(--ink-secondary);
  font-weight: 700;
}
.custom-select-option.selected .custom-select-option-count {
  background: var(--ink-border-dark);
  color: var(--paper-page);
  border-color: var(--ink-border-dark);
}
.custom-select-no-results {
  padding: 1.5rem;
  text-align: center;
  color: var(--ink-muted);
  font-family: var(--font-serif-body);
  font-style: italic;
  font-size: 0.9rem;
}

/* ==========================================================================
   Auth Group Tabs ("Manila Folder Tabs")
   ========================================================================== */
.auth-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}
.tab-btn {
  font-family: var(--font-typewriter);
  font-size: 0.825rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  background: var(--paper-card);
  color: var(--ink-secondary);
  border: 1.5px solid var(--ink-border);
  padding: 0.5rem 1rem;
  border-radius: 3px;
  cursor: pointer;
  box-shadow: 1px 2px 0px var(--ink-border);
  transition: all 0.15s ease;
}
.tab-btn:hover {
  background: var(--paper-slot);
  color: var(--ink-primary);
}
.tab-btn.active {
  background: var(--ink-border-dark);
  color: var(--paper-page);
  border-color: var(--ink-border-dark);
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.4);
}
[data-theme="dark"] .tab-btn.active {
  background: var(--ink-primary);
  color: #151311;
  border-color: var(--ink-primary);
}

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

/* ==========================================================================
   Stats & Record Status Bar
   ========================================================================== */
.stats-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-typewriter);
  font-size: 0.85rem;
  color: var(--ink-secondary);
  border-top: 1px dotted var(--ink-border);
  border-bottom: 1px dotted var(--ink-border);
  padding: 0.55rem 0.25rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.stats-count strong {
  color: var(--ink-primary);
  font-weight: 700;
}

/* ==========================================================================
   API Cards ("Vintage Paper Index Slips")
   ========================================================================== */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 1.35rem;
}
.card {
  background: var(--paper-card);
  border: 1.5px solid var(--ink-border);
  border-radius: 2px;
  padding: 1.4rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  box-shadow: var(--card-shadow);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
  overflow: hidden;
}
/* Top ledger rule inside the card */
.card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--ink-border);
  opacity: 0.35;
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--card-shadow-hover);
}

/* Pinned & Featured Cards */
.card.pinned-card,
.card.featured-card {
  border: 2px double var(--stamp-red);
  background: var(--paper-card-featured);
}
.card.pinned-card::before,
.card.featured-card::before {
  background: var(--stamp-red);
  height: 4px;
  opacity: 1;
}
.card-top {
  margin-bottom: 1rem;
}
.card-title-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.5rem;
  margin-bottom: 0.65rem;
}
.card-title {
  font-family: var(--font-serif-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--ink-primary);
  line-height: 1.25;
  display: flex;
  align-items: center;
  gap: 0.45rem;
}
.hugeicon-star {
  color: var(--stamp-red);
}
.card-desc {
  font-family: var(--font-serif-body);
  font-size: 0.925rem;
  color: var(--ink-secondary);
  line-height: 1.55;
  margin-bottom: 1.15rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ==========================================================================
   Rubber Ink Stamps & Labels
   ========================================================================== */
.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 1rem;
}
.badge {
  font-family: var(--font-typewriter);
  font-size: 0.725rem;
  font-weight: 700;
  padding: 0.2rem 0.55rem;
  border-radius: 2px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: inline-flex;
  align-items: center;
}
.badge-cat {
  background: var(--paper-slot);
  color: var(--ink-primary);
  border: 1px solid var(--ink-border);
}
.badge-no-auth {
  background: var(--stamp-green-bg);
  color: var(--stamp-green);
  border: 1px dashed var(--stamp-green);
}
.badge-api-key {
  background: var(--stamp-amber-bg);
  color: var(--stamp-amber);
  border: 1px dashed var(--stamp-amber);
}
.badge-oauth {
  background: var(--stamp-purple-bg);
  color: var(--stamp-purple);
  border: 1px dashed var(--stamp-purple);
}
.badge-other {
  background: #f5e8ea;
  color: #7a2235;
  border: 1px dashed #7a2235;
}
.badge-flag {
  background: var(--paper-label);
  color: var(--ink-secondary);
  border: 1px dotted var(--ink-border);
  font-size: 0.68rem;
}
.badge-pinned {
  background: var(--stamp-red-bg);
  color: var(--stamp-red);
  border: 1.5px solid var(--stamp-red);
  letter-spacing: 0.08em;
}
.badge-featured {
  background: var(--stamp-red-bg);
  color: var(--stamp-red);
  border: 1.5px solid var(--stamp-red);
  letter-spacing: 0.08em;
}

/* ==========================================================================
   Buttons ("Typewriter Printed Labels")
   ========================================================================== */
.card-actions {
  display: flex;
  gap: 0.6rem;
  align-items: center;
}
.btn-visit {
  flex: 1;
  background: var(--paper-input);
  border: 1.5px solid var(--ink-border-dark);
  color: var(--ink-primary);
  font-family: var(--font-typewriter);
  font-weight: 700;
  font-size: 0.825rem;
  padding: 0.55rem 0.85rem;
  border-radius: 3px;
  box-shadow: 1.5px 2px 0px var(--ink-border-dark);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  transition: all 0.12s;
}
.btn-visit:hover {
  background: var(--ink-border-dark);
  color: var(--paper-page);
  box-shadow: 0.5px 1px 0px var(--ink-border-dark);
  transform: translate(1px, 1px);
}
.btn-copy-prompt {
  background: var(--paper-slot);
  border: 1.5px solid var(--ink-border);
  color: var(--ink-secondary);
  font-family: var(--font-typewriter);
  font-weight: 700;
  font-size: 0.825rem;
  padding: 0.55rem 0.85rem;
  border-radius: 3px;
  box-shadow: 1.5px 2px 0px var(--ink-border);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  transition: all 0.12s;
  white-space: nowrap;
}
.btn-copy-prompt:hover {
  background: var(--ink-secondary);
  color: var(--paper-page);
  border-color: var(--ink-secondary);
  box-shadow: 0.5px 1px 0px var(--ink-secondary);
  transform: translate(1px, 1px);
}

.load-more-btn {
  display: block;
  margin: 2.5rem auto;
  padding: 0.85rem 2.5rem;
  background: var(--paper-card);
  color: var(--ink-primary);
  border: 2px solid var(--ink-border-dark);
  border-radius: 3px;
  font-family: var(--font-typewriter);
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  box-shadow: 2px 3px 0px var(--ink-border-dark);
  cursor: pointer;
  transition: all 0.15s ease;
}
.load-more-btn:hover {
  background: var(--ink-border-dark);
  color: var(--paper-page);
  transform: translate(1px, 1px);
  box-shadow: 1px 1px 0px var(--ink-border-dark);
}

/* ==========================================================================
   Empty State & Mascot Animation (X X Eyes holding empty scroll)
   ========================================================================== */
.empty-state-card {
  grid-column: 1 / -1;
  background: var(--paper-card);
  border: 1.5px dashed var(--ink-border);
  border-radius: 4px;
  padding: 3.5rem 1.5rem;
  text-align: center;
  box-shadow: var(--card-shadow);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin: 1.5rem 0;
  animation: fadeInEmpty 0.35s ease-out;
}
@keyframes fadeInEmpty {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.empty-mascot-container {
  margin-bottom: 1.5rem;
  animation: mascotFloat 3.2s ease-in-out infinite;
}
.empty-mascot-img {
  width: 150px;
  height: 150px;
  object-fit: contain;
  border-radius: 50%;
  border: 3px double var(--ink-border);
  box-shadow: 2px 4px 14px rgba(60, 45, 30, 0.2);
  background: var(--paper-slot);
}
.empty-mascot-svg .mascot-scroll {
  transform-origin: 80px 105px;
  animation: scrollSway 3.2s ease-in-out infinite alternate;
}
@keyframes mascotFloat {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-8px) rotate(-1.5deg); }
}
@keyframes scrollSway {
  0%, 100% { transform: rotate(-1deg); }
  50% { transform: rotate(1.5deg); }
}

.empty-state-title {
  font-family: var(--font-serif-heading);
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--ink-primary);
  margin-bottom: 0.6rem;
}
.empty-state-desc {
  font-family: var(--font-serif-body);
  font-style: italic;
  font-size: 1.05rem;
  color: var(--ink-secondary);
  max-width: 580px;
  margin: 0 auto 1.5rem auto;
  line-height: 1.55;
}
.empty-state-clear-btn {
  background: var(--paper-slot);
  border: 1.5px solid var(--ink-border-dark);
  color: var(--ink-primary);
  font-family: var(--font-typewriter);
  font-weight: 700;
  font-size: 0.875rem;
  padding: 0.65rem 1.35rem;
  border-radius: 3px;
  cursor: pointer;
  box-shadow: 2px 3px 0px var(--ink-border-dark);
  transition: all 0.12s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}
.empty-state-clear-btn:hover {
  background: var(--ink-border-dark);
  color: var(--paper-page);
  transform: translate(1px, 1px);
  box-shadow: 1px 1px 0px var(--ink-border-dark);
}

/* ==========================================================================
   Floating Action Buttons (Bottom-Right Corner)
   ========================================================================== */
.fab-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  z-index: 1500;
}
.fab-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--paper-card);
  border: 1.5px solid var(--ink-border-dark);
  color: var(--ink-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 2px 3px 0px var(--ink-border-dark), 0 4px 14px rgba(0, 0, 0, 0.15);
  transition: all 0.16s ease;
  outline: none;
}
.fab-btn:hover {
  background: var(--ink-border-dark);
  color: var(--paper-page);
  transform: translateY(-2px);
  box-shadow: 2px 5px 0px var(--ink-border-dark), 0 6px 18px rgba(0, 0, 0, 0.22);
}
.fab-btn:active {
  transform: translate(1px, 1px);
  box-shadow: 1px 1px 0px var(--ink-border-dark);
}
.fab-top-btn {
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
}
.fab-top-btn.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* ==========================================================================
   Toast Notification ("Stamped Telegram / Library Slip")
   ========================================================================== */
.toast {
  position: fixed;
  bottom: 2rem;
  left: 2rem;
  background: var(--paper-card);
  border: 2px solid var(--ink-border-dark);
  color: var(--ink-primary);
  font-family: var(--font-typewriter);
  font-size: 0.9rem;
  font-weight: 700;
  padding: 0.85rem 1.4rem;
  border-radius: 3px;
  box-shadow: 3px 5px 0px rgba(0, 0, 0, 0.4), 0 8px 24px rgba(0, 0, 0, 0.2);
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  z-index: 2000;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.25s ease;
  pointer-events: none;
}
.toast.show {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.toast-icon {
  color: var(--stamp-green);
  display: inline-flex;
  align-items: center;
}

/* ==========================================================================
   Loading Screen
   ========================================================================== */
.loading-overlay {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4rem 1rem;
  color: var(--ink-secondary);
  font-family: var(--font-typewriter);
}
.spinner {
  width: 44px;
  height: 44px;
  border: 3px solid var(--paper-slot);
  border-top-color: var(--ink-border-dark);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: 1rem;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ==========================================================================
   Responsive Adaptations & Mobile-First Polishing
   ========================================================================== */
@media (max-width: 768px) {
  body {
    padding: 1.25rem 0.85rem 5.5rem 0.85rem;
  }
  .container {
    width: 100%;
  }
  .masthead {
    margin-bottom: 1.5rem;
    padding: 1rem 0 1.25rem 0;
  }
  .masthead-meta {
    display: none !important;
  }
  .masthead-title {
    font-size: clamp(1.85rem, 6.5vw, 2.75rem);
  }
  .masthead-deck {
    font-size: 0.98rem;
    padding: 0 0.25rem;
    line-height: 1.5;
    margin-bottom: 1rem;
  }
  .rule-line {
    max-width: 80px;
  }
  .controls {
    padding: 1.15rem 1rem;
    margin-bottom: 1.25rem;
  }
  .search-row {
    flex-direction: column;
    gap: 0.75rem;
  }
  .search-wrapper {
    width: 100%;
  }
  .search-input {
    min-height: 46px;
    font-size: 0.92rem;
  }
  .custom-select-wrapper {
    width: 100%;
  }
  .custom-select-trigger {
    width: 100%;
    min-height: 46px;
    font-size: 0.9rem;
  }
  .custom-select-dropdown {
    width: 100%;
    max-height: 280px;
  }
  /* Horizontal swipeable tabs with touch scrolling */
  .auth-tabs {
    display: flex;
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    gap: 0.45rem;
    padding-bottom: 4px;
    margin-top: 0.85rem;
    padding-top: 0.85rem;
    border-top: 1px dashed var(--ink-border);
  }
  .auth-tabs::-webkit-scrollbar {
    display: none;
  }
  .tab-btn {
    flex-shrink: 0;
    white-space: nowrap;
    font-size: 0.8rem;
    padding: 0.45rem 0.8rem;
    min-height: 38px;
  }
  .grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  .card {
    padding: 1.25rem 1.1rem;
  }
  .card-title {
    font-size: 1.18rem;
  }
  .card-actions {
    display: flex;
    gap: 0.5rem;
  }
  .card-actions .btn-visit,
  .card-actions .btn-copy-prompt {
    flex: 1;
    min-height: 42px;
    font-size: 0.82rem;
    padding: 0.6rem 0.5rem;
    justify-content: center;
    text-align: center;
  }
  .fab-container {
    bottom: max(1.25rem, env(safe-area-inset-bottom, 1.25rem));
    right: 1.25rem;
    gap: 0.65rem;
  }
  .fab-btn {
    width: 48px;
    height: 48px;
  }
  .toast {
    bottom: max(1.25rem, env(safe-area-inset-bottom, 1.25rem));
    left: 50%;
    transform: translate(-50%, 20px);
    width: calc(100% - 2.5rem);
    max-width: 400px;
    justify-content: center;
    text-align: center;
    padding: 0.75rem 1rem;
    font-size: 0.82rem;
  }
  .toast.show {
    transform: translate(-50%, 0);
  }
}

@media (max-width: 480px) {
  body {
    padding: 0.85rem 0.65rem 5.5rem 0.65rem;
  }
  .masthead {
    margin-bottom: 1.15rem;
    padding: 0.85rem 0 1rem 0;
  }
  .masthead-meta {
    display: none !important;
  }
  .masthead-title {
    font-size: clamp(1.65rem, 7.5vw, 2.2rem);
    letter-spacing: -0.01em;
    margin-bottom: 0.45rem;
  }
  .masthead-deck {
    font-size: 0.88rem;
    line-height: 1.45;
    margin-bottom: 0.75rem;
    padding: 0;
  }
  .rule-line {
    max-width: 45px;
  }
  .ornament-diamond {
    font-size: 0.72rem;
    letter-spacing: 0.15em;
  }
  .controls {
    padding: 0.9rem 0.75rem;
    border-radius: 3px;
  }
  .search-input {
    font-size: 0.86rem;
    padding: 0.65rem 0.75rem 0.65rem 2.3rem;
  }
  .custom-select-trigger {
    font-size: 0.84rem;
    padding: 0.6rem 0.75rem;
  }
  .tab-btn {
    font-size: 0.76rem;
    padding: 0.4rem 0.65rem;
    min-height: 36px;
  }
  .stats-bar {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
    font-size: 0.78rem;
    padding: 0.35rem 0.15rem;
    margin-bottom: 0.85rem;
  }
  .card {
    padding: 1rem 0.85rem;
  }
  .card-title {
    font-size: 1.08rem;
  }
  .badge {
    font-size: 0.65rem;
    padding: 0.18rem 0.4rem;
  }
  .card-desc {
    font-size: 0.86rem;
    line-height: 1.45;
    margin-bottom: 0.85rem;
  }
  .empty-state-card {
    padding: 2rem 0.85rem;
  }
  .empty-mascot-svg {
    width: 125px;
    height: 115px;
  }
  .empty-state-title {
    font-size: 1.25rem;
  }
  .empty-state-desc {
    font-size: 0.88rem;
    line-height: 1.45;
    margin-bottom: 1.15rem;
  }
  .empty-state-clear-btn {
    width: 100%;
    justify-content: center;
    font-size: 0.82rem;
    padding: 0.65rem 0.85rem;
    min-height: 42px;
  }
}