/* ==========================================================================
   Minimal Collective — Style Reference (Midnight Gallery Wall)
   Strictly Monochrome: Obsidian #000000, Ash #5a5a5a, Ghost White #ffffff
   Single-weight 400 Typography (Inter substitute for PolySans)
   Zero Shadows · Zero Elevation · Zero Chromatic Color · Hairline Borders
   ========================================================================== */

:root {
  /* Colors */
  --color-obsidian: #000000;
  --color-ash: #5a5a5a;
  --color-ash-subtle: #262626;
  --color-ghost-white: #ffffff;
  --color-muted-text: #999999;

  /* Typography — Font Family */
  --font-polysans: 'Inter', ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* Typography — Scale */
  --text-caption: 14px;
  --leading-caption: 1.43;

  --text-body: 16px;
  --leading-body: 1.43;

  --text-subheading: 18px;
  --leading-subheading: 1.2;
  --tracking-subheading: -0.36px;

  --text-heading-sm: 23px;
  --leading-heading-sm: 1.2;
  --tracking-heading-sm: -0.67px;

  --text-heading: 27px;
  --leading-heading: 1.2;
  --tracking-heading: -0.86px;

  --text-heading-lg: 32px;
  --leading-heading-lg: 1;
  --tracking-heading-lg: -1.18px;

  --text-display: 50px;
  --leading-display: 1;
  --tracking-display: -2.2px;

  --text-display-xl: 77px;
  --leading-display-xl: 0.9;
  --tracking-display-xl: -4.31px;

  /* Typography — Weights */
  --font-weight-regular: 400;

  /* Spacing */
  --spacing-5: 5px;
  --spacing-6: 6px;
  --spacing-7: 7px;
  --spacing-9: 9px;
  --spacing-14: 14px;
  --spacing-18: 18px;
  --spacing-45: 45px;
  --spacing-54: 54px;
  --spacing-144: 144px;
  --spacing-173: 173px;
  --spacing-216: 216px;

  /* Layout */
  --section-gap: 144px;
  --card-padding: 18px;
  --element-gap: 14px;

  /* Border Radius */
  --radius-cards: 0px;
  --radius-badges: 4.5px;
  --radius-images: 0px;
  --radius-buttons: 4.5px;

  /* Surfaces */
  --surface-obsidian-field: #000000;
  --surface-ash-inset: #5a5a5a;
}

/* ==========================================================================
   Global Reset & Discipline
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: var(--font-polysans);
  font-weight: 400 !important;
  font-style: normal !important;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

html {
  background-color: var(--color-obsidian);
  color: var(--color-ghost-white);
  color-scheme: dark;
  scroll-behavior: smooth;
}

body {
  background-color: var(--color-obsidian);
  color: var(--color-ghost-white);
  font-size: var(--text-body);
  line-height: var(--leading-body);
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  text-align: left;
}

/* Removal of any box shadows, glows, elevations globally */
* {
  box-shadow: none !important;
  text-shadow: none !important;
}

/* Container */
.container {
  width: 100%;
  max-width: 1360px;
  margin: 0 auto;
  padding: 0 var(--spacing-18);
}

/* Hairline Divider */
.hairline-divider {
  border: 0;
  border-top: 1px solid var(--color-ash);
  width: 100%;
  margin: 0;
  opacity: 0.8;
}

/* ==========================================================================
   Top Navigation Bar
   ========================================================================== */
.site-header {
  width: 100%;
  background-color: var(--color-obsidian);
  padding: var(--spacing-14) 0;
  border-bottom: 1px solid var(--color-ash);
  position: sticky;
  top: 0;
  z-index: 100;
}

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

.brand-wrapper {
  display: flex;
  align-items: center;
}

.brand-link {
  text-decoration: none;
  color: var(--color-ghost-white);
  display: flex;
  align-items: center;
  gap: var(--spacing-9);
}

.brand-title {
  font-size: var(--text-subheading);
  line-height: var(--leading-subheading);
  letter-spacing: var(--tracking-subheading);
  color: var(--color-ghost-white);
  text-transform: uppercase;
}

.brand-badge {
  font-size: 11px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--color-ash);
  border: 1px solid var(--color-ash);
  border-radius: var(--radius-badges);
  padding: 2px 6px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-9);
}

/* ==========================================================================
   Buttons (Ghost/Outlined only — Never filled per DESIGN.md)
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--color-ghost-white);
  border: 1px solid var(--color-ghost-white);
  border-radius: var(--radius-buttons);
  padding: 6px 14px;
  font-size: var(--text-caption);
  line-height: 1;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  cursor: pointer;
  text-decoration: none;
  transition: border-color 0.2s ease, opacity 0.2s ease;
  white-space: nowrap;
}

.btn:hover {
  border-color: var(--color-ghost-white);
  opacity: 0.7;
}

.btn-ghost {
  border: 1px solid var(--color-ash);
  color: var(--color-ghost-white);
}

.btn-ghost:hover {
  border-color: var(--color-ghost-white);
}

.btn-ghost-pill {
  background: transparent;
  border: 1px solid var(--color-ash);
  color: var(--color-ghost-white);
  border-radius: var(--radius-badges);
  padding: var(--spacing-5) var(--spacing-9);
  font-size: var(--text-caption);
  line-height: 1.2;
  cursor: pointer;
  text-transform: uppercase;
  transition: border-color 0.2s ease;
}

.btn-ghost-pill:hover,
.btn-ghost-pill.active {
  border-color: var(--color-ghost-white);
}

/* ==========================================================================
   Hero Section & Concentric Arc Linework
   ========================================================================== */
.hero-section {
  position: relative;
  min-height: 80vh;
  display: flex;
  align-items: center;
  padding: var(--spacing-144) 0;
  overflow: hidden;
  background: var(--color-obsidian);
}

.hero-linework-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
  opacity: 0.6;
}

.hero-linework-bg svg {
  width: 100%;
  height: 100%;
  display: block;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 960px;
}

.hero-tag-wrap {
  margin-bottom: var(--spacing-18);
}

.ghost-pill-static {
  display: inline-block;
  border: 1px solid var(--color-ash);
  border-radius: var(--radius-badges);
  background: transparent;
  color: var(--color-ghost-white);
  padding: var(--spacing-5) var(--spacing-6);
  font-size: var(--text-caption);
  line-height: 1;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.hero-title {
  font-size: var(--text-display-xl);
  line-height: var(--leading-display-xl);
  letter-spacing: var(--tracking-display-xl);
  color: var(--color-ghost-white);
  margin-bottom: var(--spacing-18);
}

@media (max-width: 900px) {
  .hero-title {
    font-size: clamp(34px, 7vw, 54px);
    letter-spacing: -2px;
    line-height: 1.0;
  }
  .hero-section {
    padding: var(--spacing-54) 0;
    min-height: auto;
  }
}

.hero-subtitle {
  font-size: var(--text-body);
  line-height: var(--leading-body);
  color: var(--color-muted-text);
  max-width: 720px;
  margin-bottom: var(--spacing-45);
}

/* Stats Grid — Hairline Cells */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--color-ash);
  border-radius: var(--radius-cards);
  background: var(--color-obsidian);
  margin-top: var(--spacing-45);
}

.stat-box {
  padding: var(--spacing-18);
  border-right: 1px solid var(--color-ash);
  background: transparent;
}

.stat-box:last-child {
  border-right: none;
}

.stat-number {
  font-size: var(--text-display);
  line-height: var(--leading-display);
  letter-spacing: var(--tracking-display);
  color: var(--color-ghost-white);
  margin-bottom: var(--spacing-5);
}

.stat-label {
  font-size: var(--text-caption);
  line-height: var(--leading-caption);
  color: var(--color-muted-text);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

@media (max-width: 768px) {
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .stat-box:nth-child(2) {
    border-right: none;
  }
  .stat-box:nth-child(1),
  .stat-box:nth-child(2) {
    border-bottom: 1px solid var(--color-ash);
  }
}

/* ==========================================================================
   Toolbar Section (Search & Category Chips)
   ========================================================================== */
.toolbar-section {
  padding: var(--spacing-45) 0 var(--spacing-18) 0;
  background: var(--color-obsidian);
}

.toolbar-inner {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-18);
}

.search-row {
  width: 100%;
}

.search-wrapper {
  position: relative;
  width: 100%;
}

.search-input {
  width: 100%;
  background: var(--color-obsidian);
  border: 1px solid var(--color-ash);
  border-radius: var(--radius-buttons);
  color: var(--color-ghost-white);
  font-size: var(--text-caption);
  line-height: 1.4;
  padding: 12px 14px;
  outline: none;
  letter-spacing: 0.5px;
  transition: border-color 0.2s ease;
}

.search-input::placeholder {
  color: var(--color-ash);
}

.search-input:focus {
  border-color: var(--color-ghost-white);
}

.search-clear {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: none;
  color: var(--color-ash);
  font-size: 16px;
  cursor: pointer;
  display: none;
  padding: 4px;
}

.search-clear:hover {
  color: var(--color-ghost-white);
}

/* Category Chips (Ghost Pills per DESIGN.md: 1px border, 4.5px radius, 5px vertical / 6px horizontal padding) */
.categories-scroll {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-7);
}

.category-chip {
  background: transparent;
  border: 1px solid var(--color-ash);
  border-radius: var(--radius-badges);
  color: var(--color-muted-text);
  padding: var(--spacing-5) var(--spacing-6);
  font-size: var(--text-caption);
  line-height: 1;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  cursor: pointer;
  white-space: nowrap;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.category-chip:hover {
  border-color: var(--color-ghost-white);
  color: var(--color-ghost-white);
}

.category-chip.active {
  border-color: var(--color-ghost-white);
  color: var(--color-ghost-white);
}

/* Secondary Filter Meta Row */
.filter-meta-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-14);
  padding-top: var(--spacing-9);
  border-top: 1px solid var(--color-ash-subtle);
}

.danger-pills {
  display: flex;
  align-items: center;
  gap: var(--spacing-6);
  flex-wrap: wrap;
}

.filter-label {
  font-size: var(--text-caption);
  color: var(--color-ash);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-right: 4px;
}

.danger-pill {
  background: transparent;
  border: 1px solid var(--color-ash);
  border-radius: var(--radius-badges);
  color: var(--color-muted-text);
  padding: 4px 8px;
  font-size: var(--text-caption);
  line-height: 1;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.danger-pill:hover {
  border-color: var(--color-ghost-white);
  color: var(--color-ghost-white);
}

.danger-pill.active {
  border-color: var(--color-ghost-white);
  color: var(--color-ghost-white);
}

.filter-right-group {
  display: flex;
  align-items: center;
  gap: var(--spacing-18);
}

.results-count {
  font-size: var(--text-caption);
  color: var(--color-ash);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ==========================================================================
   Cards Grid & Editorial Spread (0px radius, 18px padding, hairline border)
   ========================================================================== */
.catalog-container {
  padding-top: var(--spacing-45);
  padding-bottom: var(--spacing-54);
}

.tricks-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: var(--spacing-18);
}

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

.trick-card {
  background: var(--color-obsidian);
  border: 1px solid var(--color-ash);
  border-radius: var(--radius-cards);
  padding: var(--card-padding);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: border-color 0.2s ease;
  position: relative;
}

.trick-card:hover {
  border-color: var(--color-ghost-white);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-14);
}

.badge-group {
  display: flex;
  align-items: center;
  gap: var(--spacing-6);
}

.card-number {
  border: 1px solid var(--color-ghost-white);
  border-radius: var(--radius-badges);
  padding: 3px 6px;
  font-size: 12px;
  line-height: 1;
  color: var(--color-ghost-white);
  text-transform: uppercase;
}

.card-level-badge {
  border: 1px solid var(--color-ash);
  border-radius: var(--radius-badges);
  padding: 3px 6px;
  font-size: 12px;
  line-height: 1;
  color: var(--color-muted-text);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.favorite-btn {
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 4px;
  color: var(--color-ash);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s ease;
}

.favorite-btn svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  stroke-width: 1.5;
  fill: none;
}

.favorite-btn:hover {
  color: var(--color-ghost-white);
}

.favorite-btn.favorited {
  color: var(--color-ghost-white);
}

.favorite-btn.favorited svg {
  fill: var(--color-ghost-white);
}

.card-category {
  font-size: 12px;
  line-height: 1;
  color: var(--color-ash);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--spacing-9);
}

.card-title {
  font-size: var(--text-heading-sm);
  line-height: var(--leading-heading-sm);
  letter-spacing: var(--tracking-heading-sm);
  color: var(--color-ghost-white);
  margin-bottom: var(--spacing-14);
}

.card-description {
  font-size: var(--text-body);
  line-height: var(--leading-body);
  color: var(--color-muted-text);
  margin-bottom: var(--spacing-14);
}

.card-quote {
  border-left: 1px solid var(--color-ash);
  padding: var(--spacing-9) var(--spacing-14);
  font-size: var(--text-caption);
  line-height: var(--leading-caption);
  color: var(--color-muted-text);
  margin-bottom: var(--spacing-14);
  background: transparent;
}

.card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--spacing-14);
  border-top: 1px solid var(--color-ash-subtle);
  margin-top: auto;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-5);
}

.tag-badge {
  border: 1px solid var(--color-ash-subtle);
  border-radius: var(--radius-badges);
  padding: 2px 6px;
  font-size: 11px;
  color: var(--color-ash);
  text-transform: lowercase;
}

.btn-card-detail {
  background: transparent;
  border: 1px solid var(--color-ghost-white);
  border-radius: var(--radius-buttons);
  color: var(--color-ghost-white);
  padding: 4px 10px;
  font-size: var(--text-caption);
  line-height: 1;
  text-transform: uppercase;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: opacity 0.2s ease;
}

.btn-card-detail:hover {
  opacity: 0.7;
}

/* Empty State */
.empty-state {
  grid-column: 1 / -1;
  padding: var(--spacing-54) var(--spacing-18);
  border: 1px solid var(--color-ash);
  text-align: center;
}

.empty-title {
  font-size: var(--text-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ghost-white);
  margin-bottom: var(--spacing-9);
}

.empty-text {
  font-size: var(--text-body);
  color: var(--color-ash);
  margin-bottom: var(--spacing-18);
}

/* Back to top button */
.back-to-top-btn {
  position: fixed;
  bottom: var(--spacing-18);
  right: var(--spacing-18);
  background: var(--color-obsidian);
  border: 1px solid var(--color-ghost-white);
  border-radius: var(--radius-buttons);
  color: var(--color-ghost-white);
  width: 40px;
  height: 40px;
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  cursor: pointer;
  z-index: 90;
  transition: opacity 0.2s ease;
}

.back-to-top-btn.visible {
  display: flex;
}

.back-to-top-btn:hover {
  opacity: 0.7;
}

/* ==========================================================================
   Modals (0px radius, Obsidian field, Ghost White hairline border)
   ========================================================================== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.92);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: var(--spacing-18);
  overflow-y: auto;
}

.modal-overlay.active {
  display: flex;
}

.modal-container {
  background: var(--color-obsidian);
  border: 1px solid var(--color-ghost-white);
  border-radius: var(--radius-cards);
  width: 100%;
  max-width: 720px;
  padding: var(--spacing-45);
  position: relative;
  max-height: 90vh;
  overflow-y: auto;
}

@media (max-width: 600px) {
  .modal-container {
    padding: var(--spacing-18);
  }
}

.modal-close-btn {
  position: absolute;
  top: var(--spacing-18);
  right: var(--spacing-18);
  background: transparent;
  border: none;
  color: var(--color-ghost-white);
  font-size: 18px;
  cursor: pointer;
  padding: 4px;
}

.modal-close-btn:hover {
  opacity: 0.6;
}

.modal-header {
  margin-bottom: var(--spacing-18);
  padding-bottom: var(--spacing-14);
  border-bottom: 1px solid var(--color-ash);
}

.modal-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-6);
  margin-bottom: var(--spacing-9);
}

.modal-title {
  font-size: var(--text-heading-lg);
  line-height: var(--leading-heading-lg);
  letter-spacing: var(--tracking-heading-lg);
  color: var(--color-ghost-white);
}

.modal-section {
  margin-bottom: var(--spacing-18);
}

.modal-section-title {
  font-size: 13px;
  letter-spacing: 0.5px;
  color: var(--color-ash);
  text-transform: uppercase;
  margin-bottom: var(--spacing-9);
}

.modal-text {
  font-size: var(--text-body);
  line-height: var(--leading-body);
  color: var(--color-ghost-white);
}

.modal-quote-box {
  border-left: 1px solid var(--color-ash);
  padding: var(--spacing-9) var(--spacing-14);
  font-size: var(--text-body);
  line-height: var(--leading-body);
  color: #cccccc;
  background: transparent;
}

.modal-defense-box {
  border: 1px solid var(--color-ash);
  border-radius: var(--radius-cards);
  padding: var(--spacing-14);
  font-size: var(--text-body);
  line-height: var(--leading-body);
  color: var(--color-ghost-white);
  background: transparent;
}

.modal-actions {
  display: flex;
  gap: var(--spacing-9);
  padding-top: var(--spacing-18);
  border-top: 1px solid var(--color-ash);
  flex-wrap: wrap;
}

/* ==========================================================================
   Footer (Austere Editorial Field)
   ========================================================================== */
.site-footer {
  background: var(--color-obsidian);
  padding: var(--spacing-54) 0;
  border-top: 1px solid var(--color-ash);
  margin-top: var(--spacing-54);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--spacing-45);
  margin-bottom: var(--spacing-45);
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-18);
  }
}

.footer-title {
  font-size: var(--text-subheading);
  line-height: var(--leading-subheading);
  letter-spacing: var(--tracking-subheading);
  color: var(--color-ghost-white);
  text-transform: uppercase;
  margin-bottom: var(--spacing-9);
}

.footer-desc {
  font-size: var(--text-caption);
  line-height: var(--leading-caption);
  color: var(--color-ash);
  max-width: 480px;
}

.footer-col-title {
  font-size: 13px;
  color: var(--color-ash);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--spacing-14);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-9);
}

.footer-links a {
  color: var(--color-muted-text);
  text-decoration: none;
  font-size: var(--text-caption);
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: var(--color-ghost-white);
}

.footer-bottom {
  padding-top: var(--spacing-18);
  border-top: 1px solid var(--color-ash-subtle);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--spacing-9);
  font-size: 12px;
  color: var(--color-ash);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}