/* ============================================================
   STK Portal — Lightweight, Fast & Modern SaaS Dashboard Theme
   Optimized for High Performance, Zero Lag & All Devices
   ============================================================ */

:root {
  /* Clean Dark Palette */
  --bg: #090d16;
  --bg-card: #0f1422;
  --bg-card-hover: #151c30;
  --surface-border: #1e2638;
  --surface-border-hover: #4f46e5;
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --primary: #6366f1;
  --primary-light: #818cf8;
  
  --font-main: 'Plus Jakarta Sans', 'Inter', system-ui, -apple-system, sans-serif;
  --container-max: 1280px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
}

/* Base Reset — Zero Layout Thrashing */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  color-scheme: dark;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg);
  color: var(--text-main);
  line-height: 1.5;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

/* Custom Lightweight Scrollbar */
::-webkit-scrollbar {
  width: 7px;
}
::-webkit-scrollbar-track {
  background: var(--bg);
}
::-webkit-scrollbar-thumb {
  background: #1e293b;
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: #334155;
}

a {
  text-decoration: none;
  color: inherit;
}

img {
  display: block;
  max-width: 100%;
}

.container {
  width: min(100% - 32px, var(--container-max));
  margin: 0 auto;
}

/* ============================================================
   TOPBAR NAVIGATION (Solid Fast Performance)
   ============================================================ */
.portal-topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 68px;
  display: flex;
  align-items: center;
  background: #0d121e;
  border-bottom: 1px solid var(--surface-border);
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
}

.logo-badge {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  background: #4f46e5;
  color: #ffffff;
  font-size: 1.05rem;
}

.brand-text span {
  color: #ffffff;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 14px;
}

.portal-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 5px 12px;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-radius: 99px;
  font-size: 0.72rem;
  font-weight: 700;
  color: #34d399;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #10b981;
}

/* ============================================================
   HERO BANNER (Clean, Non-laggy)
   ============================================================ */
.hero-section {
  padding: clamp(35px, 5vw, 60px) 0 clamp(25px, 3vw, 40px);
  text-align: center;
}

.hero-content {
  max-width: 820px;
  margin: 0 auto;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 14px;
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.25);
  border-radius: 99px;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary-light);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.hero-title {
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: #ffffff;
  margin-bottom: 12px;
}

.hero-title .gradient-text {
  color: #818cf8;
}

.hero-subtitle {
  font-size: clamp(0.92rem, 1.6vw, 1.05rem);
  color: var(--text-muted);
  max-width: 580px;
  margin: 0 auto 28px;
  line-height: 1.5;
}

/* ============================================================
   SEARCH BAR
   ============================================================ */
.search-container {
  max-width: 600px;
  margin: 0 auto;
  position: relative;
}

.search-input-box {
  display: flex;
  align-items: center;
  width: 100%;
  padding: 13px 18px;
  background: var(--bg-card);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  transition: border-color 0.2s ease;
}

.search-input-box:focus-within {
  border-color: var(--primary-light);
}

.search-icon-left {
  font-size: 1rem;
  color: var(--text-dim);
  margin-right: 12px;
}

.search-input-box:focus-within .search-icon-left {
  color: var(--primary-light);
}

.portal-search-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  font-family: inherit;
  font-size: 0.98rem;
  color: var(--text-main);
}

.portal-search-input::placeholder {
  color: var(--text-dim);
}

.search-shortcut-badge {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-dim);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 2px 7px;
  border-radius: 5px;
  margin-left: 8px;
}

.search-spinner-icon {
  display: none;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.15);
  border-top-color: var(--primary-light);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  margin-left: 8px;
}

.search-spinner-icon.active {
  display: block;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ============================================================
   CATEGORY SHOWCASE SECTION
   ============================================================ */
.category-section {
  padding: 15px 0 25px;
}

.category-nav-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.section-label {
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 7px;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(185px, 1fr));
  gap: 12px;
}

.cat-pill-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  text-align: left;
  user-select: none;
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

.cat-pill-card:hover {
  border-color: rgba(255, 255, 255, 0.2);
  background: var(--bg-card-hover);
}

.cat-pill-card.active {
  background: #182035;
  border-color: var(--primary-light);
}

.cat-icon-wrap {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 1.05rem;
  color: var(--primary-light);
  flex-shrink: 0;
}

.cat-pill-card.active .cat-icon-wrap {
  background: var(--primary);
  color: #ffffff;
}

.cat-meta {
  display: flex;
  flex-direction: column;
}

.cat-name {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-main);
}

.cat-desc-sub {
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--text-dim);
}

.cat-count-badge {
  margin-left: auto;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 99px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-dim);
  border: 1px solid rgba(255, 255, 255, 0.08);
  flex-shrink: 0;
}

.cat-pill-card.active .cat-count-badge {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}

/* ============================================================
   PORTAL CARDS GRID (Fast Rendering, No Jank)
   ============================================================ */
.cards-main-section {
  padding: 10px 0 60px;
}

.results-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.results-count {
  font-size: 0.85rem;
  color: var(--text-dim);
  font-weight: 600;
}

.portal-grid-container {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

/* Individual Portal Card */
.portal-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.portal-card:hover {
  transform: translateY(-2px);
  border-color: var(--primary-light);
  background: var(--bg-card-hover);
}

/* 16:9 Image Container (600 x 340 px) */
.card-media-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #080c14;
}

.card-media-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.card-media-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(15, 20, 34, 0.9) 100%);
  pointer-events: none;
}

.card-placeholder-fallback {
  width: 100%;
  height: 100%;
  display: grid;
  place-items: center;
  background: #141b2c;
  color: var(--primary-light);
  font-size: 2.2rem;
}

.card-category-badge {
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 2;
  padding: 4px 10px;
  border-radius: 99px;
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #ffffff;
  background: #0f1422;
  border: 1px solid rgba(255, 255, 255, 0.12);
}

/* Card Content Area */
.card-details-box {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 16px;
}

.card-heading {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-main);
  margin-bottom: 6px;
}

.card-summary {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.45;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

.card-action-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  margin-top: auto;
}

.launch-btn-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--primary-light);
}

.launch-icon-arrow {
  font-size: 0.72rem;
}

.portal-card:hover .launch-btn-label {
  color: #ffffff;
}

/* ============================================================
   EMPTY STATE & SKELETON LOADING
   ============================================================ */
.cards-skeleton-loader {
  display: none;
  grid-column: 1 / -1;
  width: 100%;
}

.cards-skeleton-loader.active {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

@media (max-width: 1200px) {
  .cards-skeleton-loader.active {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }
}
@media (max-width: 860px) {
  .cards-skeleton-loader.active {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }
}
@media (max-width: 600px) {
  .cards-skeleton-loader.active {
    grid-template-columns: 1fr;
    gap: 12px;
  }
}

.skeleton-portal-card {
  background: var(--bg-card);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.skeleton-media {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #131929;
}

.skeleton-body {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.skeleton-bar {
  height: 12px;
  border-radius: 4px;
  background: #171f33;
}

.skeleton-bar.w-title { width: 60%; height: 16px; }
.skeleton-bar.w-desc1 { width: 90%; }
.skeleton-bar.w-desc2 { width: 75%; }
.skeleton-bar.w-btn { width: 35%; height: 14px; margin-top: 8px; }

.empty-results-box {
  display: none;
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 20px;
  background: var(--bg-card);
  border: 1px dashed var(--surface-border);
  border-radius: var(--radius-xl);
}

.empty-results-box.show {
  display: block;
}

.empty-icon-art {
  font-size: 2.5rem;
  color: var(--text-dim);
  margin-bottom: 12px;
}

.empty-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 6px;
}

.empty-sub {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ============================================================
   FOOTER
   ============================================================ */
.portal-footer {
  border-top: 1px solid var(--surface-border);
  background: #090d16;
  padding: 24px 0;
  margin-top: auto;
}

.footer-inner-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--text-dim);
}

.footer-copy {
  font-weight: 500;
}

.footer-right-links {
  display: flex;
  align-items: center;
  gap: 16px;
}

.back-to-top-btn {
  background: transparent;
  border: none;
  color: var(--text-dim);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.back-to-top-btn:hover {
  color: var(--primary-light);
}

/* ============================================================
   RESPONSIVE BREAKPOINTS (ALL DEVICES)
   ============================================================ */
@media (max-width: 1200px) {
  .portal-grid-container {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (max-width: 860px) {
  .portal-grid-container {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }
  .category-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .container {
    width: min(100% - 20px, var(--container-max));
  }
  .portal-topbar {
    height: 58px;
  }
  .brand-logo {
    font-size: 1.05rem;
  }
  .logo-badge {
    width: 32px;
    height: 32px;
    font-size: 0.95rem;
  }
  .hero-section {
    padding: 30px 0 20px;
  }
  .hero-title {
    font-size: 1.85rem;
  }
  .search-input-box {
    padding: 11px 14px;
    border-radius: var(--radius-md);
  }
  .portal-search-input {
    font-size: 0.92rem;
  }
  .search-shortcut-badge {
    display: none;
  }
  .category-grid {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .cat-pill-card {
    padding: 10px 12px;
  }
  .portal-grid-container {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .card-details-box {
    padding: 14px;
  }
  .footer-inner-box {
    flex-direction: column;
    gap: 10px;
    text-align: center;
  }
}