/**
 * LinkCoo.asia - Core Stylesheet
 * Giao diện sáng, năng động, chuẩn Responsive & Performance
 */

/* 1. Reset & Global Box Sizing */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family-sans);
  background-color: var(--color-bg-base);
  color: var(--color-text-main);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* 2. Layout & Utility Classes */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

.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;
}

/* 3. Header & Navigation */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--glass-bg);
  backdrop-filter: var(--glass-backdrop);
  -webkit-backdrop-filter: var(--glass-backdrop);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition-normal);
}

.header.scrolled {
  box-shadow: var(--shadow-sm);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo-wrapper {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: inherit;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, #2563EB 0%, #06B6D4 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  box-shadow: 0 4px 10px rgba(37, 99, 235, 0.3);
}

.logo-text-group {
  display: flex;
  flex-direction: column;
}

.logo-title {
  font-size: var(--font-size-xl);
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #1E3A8A 0%, #2563EB 50%, #0284C7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-sub {
  font-size: var(--font-size-xs);
  color: var(--color-text-light);
  font-weight: 500;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  background-color: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-text-muted);
}

.status-dot {
  width: 8px;
  height: 8px;
  background-color: var(--color-accent-emerald);
  border-radius: 50%;
  box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.2);
  animation: pulseSubtle 2s infinite ease-in-out;
}

/* 4. Hero Section */
.hero-section {
  position: relative;
  padding: var(--space-16) 0 var(--space-12);
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 100%);
  border-bottom: 1px solid var(--color-border);
  overflow: hidden;
  text-align: center;
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 880px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 6px 16px;
  background: rgba(37, 99, 235, 0.08);
  border: 1px solid rgba(37, 99, 235, 0.2);
  border-radius: var(--radius-full);
  color: var(--color-primary);
  font-size: var(--font-size-sm);
  font-weight: 600;
  margin-bottom: var(--space-5);
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: var(--space-4);
  color: var(--color-text-main);
}

.hero-title .gradient-text {
  background: linear-gradient(135deg, #2563EB 0%, #06B6D4 50%, #F97316 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--color-text-muted);
  max-width: 680px;
  margin: 0 auto var(--space-8);
  line-height: 1.6;
}

/* Quick Launch Subdomain Action Buttons */
.quick-launch-section {
  margin: 0 auto var(--space-6);
  max-width: 860px;
}

.quick-launch-label {
  display: block;
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--color-text-light);
  margin-bottom: var(--space-3);
}

.quick-launch-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
}

.btn-quick-subdomain {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  background: #FFFFFF;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text-main);
  text-decoration: none;
  font-size: var(--font-size-xs);
  font-weight: 700;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.btn-quick-subdomain .btn-quick-icon {
  display: flex;
  align-items: center;
  color: var(--btn-accent, var(--color-primary));
}

.btn-quick-subdomain .btn-quick-icon svg {
  width: 16px;
  height: 16px;
}

.btn-quick-subdomain .btn-quick-arrow {
  display: flex;
  align-items: center;
  color: var(--color-text-subtle);
  transition: transform var(--transition-fast), color var(--transition-fast);
}

.btn-quick-subdomain .btn-quick-arrow svg {
  width: 14px;
  height: 14px;
}

.btn-quick-subdomain:hover {
  border-color: var(--btn-accent, var(--color-primary));
  background: #FFFFFF;
  color: var(--btn-accent, var(--color-primary));
  transform: translateY(-2px);
  box-shadow: 0 6px 14px rgba(0, 0, 0, 0.08);
}

.btn-quick-subdomain:hover .btn-quick-arrow {
  transform: translate(2px, -2px);
  color: var(--btn-accent, var(--color-primary));
}

/* 5. Live Search & Category Controls */
.search-container {
  max-width: 640px;
  margin: 0 auto var(--space-6);
  position: relative;
}

.search-input-box {
  position: relative;
  display: flex;
  align-items: center;
  background: #FFFFFF;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-full);
  padding: 8px 16px 8px 20px;
  box-shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.08);
  transition: all var(--transition-fast);
}

.search-input-box:focus-within {
  border-color: var(--color-primary);
  box-shadow: 0 12px 30px -5px rgba(37, 99, 235, 0.2);
}

.search-icon {
  color: var(--color-text-subtle);
  display: flex;
  align-items: center;
  margin-right: var(--space-3);
  flex-shrink: 0;
}

.search-input {
  width: 100%;
  border: none;
  outline: none;
  font-size: var(--font-size-base);
  color: var(--color-text-main);
  background: transparent;
  font-family: inherit;
}

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

.search-clear-btn {
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--color-text-subtle);
  display: none;
  padding: 4px;
  border-radius: 50%;
  transition: color var(--transition-fast);
}

.search-clear-btn:hover {
  color: var(--color-text-main);
}

.shortcut-badge {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  background: var(--color-bg-muted);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 2px 8px;
  font-size: var(--font-size-xs);
  color: var(--color-text-light);
  font-weight: 600;
  pointer-events: none;
  flex-shrink: 0;
  margin-left: var(--space-2);
}

/* Category Filter Pills */
.category-filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.category-pill-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 8px 18px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  background: #FFFFFF;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.category-pill-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.category-pill-btn.active {
  background: var(--color-primary);
  color: #FFFFFF;
  border-color: var(--color-primary);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

/* 6. Ecosystem Cards Grid Section */
.ecosystem-section {
  padding: var(--space-12) 0 var(--space-20);
  background-color: var(--color-bg-subtle);
  flex-grow: 1;
}

.section-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-8);
  flex-wrap: wrap;
  gap: var(--space-4);
}

.section-title {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  color: var(--color-text-main);
  letter-spacing: -0.02em;
}

.services-count-badge {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-light);
  background: #FFFFFF;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
}

.services-count-badge strong {
  color: var(--color-primary);
}

/* Card Grid Layout */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(285px, 1fr));
  gap: var(--space-6);
}

/* Individual Ecosystem Card */
.ecosystem-card {
  background: #FFFFFF;
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
  text-decoration: none;
  color: inherit;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.ecosystem-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--card-accent, var(--color-primary));
  opacity: 0.8;
  transition: height var(--transition-fast);
}

.ecosystem-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-card-hover);
  border-color: rgba(37, 99, 235, 0.4);
}

.ecosystem-card:hover::before {
  height: 6px;
}

.card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: var(--space-4);
}

.card-icon-container {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background-color: var(--card-icon-bg, #EFF6FF);
  color: var(--card-accent, #2563EB);
  transition: transform var(--transition-fast);
}

.ecosystem-card:hover .card-icon-container {
  transform: scale(1.08) rotate(-2deg);
}

.card-badge {
  font-size: var(--font-size-xs);
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  background-color: var(--card-badge-bg, #F1F5F9);
  color: var(--card-badge-color, #475569);
  letter-spacing: 0.02em;
}

.card-content {
  flex-grow: 1;
  margin-bottom: var(--space-5);
}

.card-title-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: var(--space-1);
}

.card-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-text-main);
  letter-spacing: -0.01em;
}

.card-domain {
  font-size: var(--font-size-xs);
  font-family: monospace;
  color: var(--color-text-light);
  margin-bottom: var(--space-3);
  display: flex;
  align-items: center;
  gap: 4px;
}

.card-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
  margin-bottom: var(--space-4);
}

/* Card Tag Chips */
.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.card-tag {
  font-size: 0.72rem;
  background: var(--color-bg-muted);
  color: var(--color-text-muted);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  font-weight: 500;
}

/* Card CTA Action Footer */
.card-action-row {
  margin-top: auto;
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-bg-muted);
  display: flex;
  align-items: center;
}

.btn-open-subdomain {
  width: 100%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 11px 18px;
  background: var(--card-accent, var(--color-primary));
  color: #FFFFFF;
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 700;
  letter-spacing: 0.01em;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  transition: all var(--transition-fast);
}

.ecosystem-card:hover .btn-open-subdomain {
  transform: translateY(-2px);
  filter: brightness(1.08);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.16);
}

.btn-open-subdomain .btn-icon {
  display: inline-flex;
  align-items: center;
  transition: transform var(--transition-fast);
}

.ecosystem-card:hover .btn-open-subdomain .btn-icon {
  transform: translate(2px, -2px);
}

/* Empty State */
.empty-state {
  display: none;
  text-align: center;
  padding: var(--space-16) var(--space-6);
  background: #FFFFFF;
  border-radius: var(--radius-2xl);
  border: 1px dashed var(--color-border);
  max-width: 540px;
  margin: var(--space-8) auto;
}

.empty-state.active {
  display: block;
}

.empty-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-4);
  color: var(--color-text-subtle);
}

.empty-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.empty-desc {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-5);
}

.empty-reset-btn {
  padding: 8px 20px;
  background: var(--color-primary);
  color: #FFFFFF;
  border: none;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.empty-reset-btn:hover {
  background: var(--color-primary-hover);
}

/* 7. Trust & Value Props Section */
.trust-section {
  padding: var(--space-16) 0;
  background: #FFFFFF;
  border-top: 1px solid var(--color-border);
}

.trust-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto var(--space-12);
}

.trust-title {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-2);
}

.trust-subtitle {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-6);
}

.trust-card {
  padding: var(--space-6);
  background: var(--color-bg-subtle);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  transition: transform var(--transition-fast);
}

.trust-card:hover {
  transform: translateY(-4px);
}

.trust-icon-box {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--color-primary-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
}

.trust-card-title {
  font-size: var(--font-size-base);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.trust-card-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* 8. Footer */
.footer {
  background: #FFFFFF;
  border-top: 1px solid var(--color-border);
  padding: var(--space-12) 0 var(--space-8);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-10);
  margin-bottom: var(--space-10);
}

.footer-brand p {
  margin-top: var(--space-3);
  max-width: 360px;
  line-height: 1.6;
}

.footer-col-title {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-text-main);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-4);
}

.footer-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-link {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.footer-link:hover {
  color: var(--color-primary);
}

.footer-bottom {
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
  font-size: var(--font-size-xs);
  color: var(--color-text-light);
}

.cloudflare-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #FFF7ED;
  color: #C2410C;
  border: 1px solid #FFEDD5;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-weight: 600;
}

/* 9. Responsive Adjustments */
@media (max-width: 900px) {
  .footer-top {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
}

@media (max-width: 640px) {
  .header-content {
    height: 64px;
  }
  .status-pill {
    display: none;
  }
  .shortcut-badge {
    display: none;
  }
  .hero-section {
    padding: var(--space-10) 0 var(--space-8);
  }
  .cards-grid {
    grid-template-columns: 1fr;
  }
  .category-filter-bar {
    justify-content: flex-start;
    overflow-x: auto;
    padding-bottom: var(--space-2);
    -webkit-overflow-scrolling: touch;
    flex-wrap: nowrap;
  }
  .category-pill-btn {
    white-space: nowrap;
    padding: 6px 14px;
  }
}