/* ==========================================================================
   Base Styles & Design Tokens
   ========================================================================== */
:root {
  --bg-primary: #0a0e17;
  --bg-secondary: #111827;
  --bg-card: #151d30;
  --bg-card-hover: #1c2640;
  --bg-modal: #131c31;
  --bg-overlay: rgba(5, 8, 15, 0.75);

  --border-color: rgba(255, 255, 255, 0.08);
  --border-color-hover: rgba(56, 189, 248, 0.4);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --accent-cyan: #38bdf8;
  --accent-blue: #3b82f6;
  --accent-indigo: #6366f1;
  --accent-green: #34d399;
  --accent-amber: #fbbf24;

  --tag-bg: rgba(56, 189, 248, 0.1);
  --tag-text: #7dd3fc;

  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-pill: 9999px;

  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
  --shadow-card: 0 4px 20px -2px rgba(0, 0, 0, 0.4);
  --shadow-hover: 0 12px 30px -4px rgba(56, 189, 248, 0.15), 0 8px 16px -4px rgba(0, 0, 0, 0.4);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ==========================================================================
   Header & Hero Section
   ========================================================================== */
.header {
  background: radial-gradient(circle at 50% 0%, #1e293b 0%, var(--bg-primary) 70%);
  border-bottom: 1px solid var(--border-color);
  padding: 56px 20px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.header::before {
  content: "";
  position: absolute;
  top: -120px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 240px;
  background: radial-gradient(ellipse, rgba(56, 189, 248, 0.15) 0%, transparent 70%);
  filter: blur(40px);
  pointer-events: none;
}

.header-container {
  max-width: 1040px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.features-tagline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 20px;
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: default;
  user-select: none;
}

.feature-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-secondary);
  letter-spacing: 0.01em;
}

.feature-divider {
  color: rgba(255, 255, 255, 0.2);
  font-size: 0.75rem;
}

.header h1 {
  font-size: 2.75rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  margin-bottom: 12px;
  background: linear-gradient(135deg, #ffffff 40%, #94a3b8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.header-lead {
  font-size: clamp(0.95rem, 1.8vw, 1.15rem);
  color: var(--text-secondary);
  max-width: 100%;
  margin: 0 auto 20px;
  white-space: nowrap;
}

.philosophy-card {
  background: rgba(17, 24, 39, 0.7);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin: 24px auto 0;
  max-width: 720px;
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
  text-align: left;
}

.philosophy-card p + p {
  margin-top: 6px;
}

.header-links {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  margin-top: 24px;
  flex-wrap: wrap;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  text-decoration: none;
  transition: var(--transition-fast);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.2);
}

/* ==========================================================================
   Controls: Search & Category Filter
   ========================================================================== */
.controls-section {
  max-width: 1200px;
  margin: 32px auto 0;
  padding: 0 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.search-wrapper {
  position: relative;
  max-width: 580px;
  width: 100%;
  margin: 0 auto;
}

.search-input {
  width: 100%;
  padding: 14px 18px 14px 46px;
  border-radius: var(--radius-pill);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition-fast);
}

.search-input:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.15);
}

.search-icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 20px;
  stroke: var(--text-muted);
  pointer-events: none;
}

.filter-tabs {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.filter-tab {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 7px 16px;
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.filter-tab:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.15);
}

.filter-tab.active {
  background: var(--accent-cyan);
  color: #0b0f19;
  border-color: var(--accent-cyan);
  font-weight: 600;
}

.tab-count {
  font-size: 0.75rem;
  padding: 1px 6px;
  border-radius: var(--radius-pill);
  background: rgba(0, 0, 0, 0.2);
}

.filter-tab.active .tab-count {
  background: rgba(0, 0, 0, 0.25);
  color: #0b0f19;
}

/* ==========================================================================
   Tools Grid & Cards
   ========================================================================== */
.main-content {
  max-width: 1200px;
  margin: 32px auto 60px;
  padding: 0 20px;
  flex: 1;
  min-height: 60vh;
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  align-items: start;
}

.tool-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 22px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  cursor: pointer;
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
  position: relative;
  outline: none;
}

.tool-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-color-hover);
  box-shadow: var(--shadow-hover);
}

.tool-card:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 2px;
}

.tool-card.hidden {
  display: none !important;
}

.card-top {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 14px;
}

.tool-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-md);
  object-fit: contain;
  background: #1e293b;
  border: 1px solid var(--border-color);
  flex-shrink: 0;
  padding: 4px;
}

.card-header-info {
  flex: 1;
  min-width: 0;
}

.card-title {
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.35;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.platform-badges {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.platform-pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.platform-icon {
  width: 14px;
  height: 14px;
  object-fit: contain;
}

.card-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 16px;
  flex-grow: 1;
}

.tool-details-source {
  display: none !important;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 18px;
}

.tag {
  font-size: 0.73rem;
  color: var(--tag-text);
  background: var(--tag-bg);
  padding: 2px 8px;
  border-radius: 4px;
}

.card-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding-top: 14px;
  border-top: 1px solid var(--border-color);
  margin-top: auto;
}

.links-group {
  display: flex;
  align-items: center;
  gap: 6px;
}

.link-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition-fast);
}

.link-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
}

.link-btn img {
  width: 18px;
  height: 18px;
}

.btn-details {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.2);
  padding: 7px 12px;
  border-radius: var(--radius-pill);
  transition: var(--transition-fast);
  cursor: pointer;
}

.btn-details:hover {
  background: rgba(56, 189, 248, 0.18);
  border-color: var(--accent-cyan);
}

.hidden {
  display: none !important;
}

.no-results {
  text-align: center;
  padding: 36px 20px 60px;
  color: var(--text-secondary);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
}

.no-results.hidden {
  display: none !important;
}

.no-results svg {
  width: 44px;
  height: 44px;
  stroke: var(--text-muted);
  margin-bottom: 16px;
  opacity: 0.7;
}

.no-results h3 {
  font-size: 1.3rem;
  color: var(--text-primary);
  margin-bottom: 8px;
}

/* ==========================================================================
   Modal Dialog
   ========================================================================== */
.modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 1;
  visibility: visible;
  transition: opacity var(--transition-fast), visibility var(--transition-fast);
}

.modal.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.modal-overlay {
  position: absolute;
  inset: 0;
  background: var(--bg-overlay);
  backdrop-filter: blur(8px);
}

.modal-container {
  position: relative;
  z-index: 2;
  background: var(--bg-modal);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: 0 25px 60px -10px rgba(0, 0, 0, 0.6);
  max-width: 820px;
  width: 100%;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: modalSlideUp 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalSlideUp {
  from {
    transform: translateY(20px) scale(0.97);
    opacity: 0;
  }
  to {
    transform: translateY(0) scale(1);
    opacity: 1;
  }
}

.modal-header {
  padding: 24px 28px 16px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.modal-header-content {
  display: flex;
  align-items: center;
  gap: 16px;
}

.modal-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: #1e293b;
  border: 1px solid var(--border-color);
  padding: 4px;
}

.modal-title-wrap h2 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.modal-close {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  width: 36px;
  height: 36px;
  border-radius: var(--radius-pill);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  cursor: pointer;
  transition: var(--transition-fast);
  flex-shrink: 0;
}

.modal-close:hover {
  background: rgba(255, 255, 255, 0.12);
  color: var(--text-primary);
}

.modal-body {
  padding: 24px 28px;
  overflow-y: auto;
  flex: 1;
}

.modal-gallery {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

.modal-gallery img {
  max-width: 100%;
  max-height: 280px;
  width: auto;
  height: auto;
  min-width: 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: #1e293b;
  object-fit: contain;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.modal-gallery img:not(:only-child) {
  max-width: calc((100% - 16px) / 2);
}

.modal-desc-heading {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.modal-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  background: rgba(0, 0, 0, 0.2);
  padding: 16px 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  margin-bottom: 24px;
}

.modal-desc > * + * {
  margin-top: 12px;
}

.modal-desc p {
  margin: 0;
}

.modal-desc .feature-group {
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--border-color);
}

.modal-desc .feature-group:first-child {
  padding-top: 0;
  border-top: none;
}

.modal-desc .feature-label {
  color: var(--accent-cyan);
  font-weight: 600;
  display: block;
  margin-bottom: 8px;
}

.modal-desc ul {
  margin: 0 0 0 1.15em;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.modal-desc li {
  line-height: 1.55;
}

.modal-desc code {
  background: rgba(255, 255, 255, 0.1);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: monospace;
  font-size: 0.9em;
  color: var(--accent-cyan);
}

.modal-desc .feature-note {
  font-size: 0.88rem;
  color: #fbbf24;
  margin-top: 10px;
}

.modal-footer {
  padding: 18px 28px;
  border-top: 1px solid var(--border-color);
  background: rgba(10, 14, 23, 0.5);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.modal-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.btn-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: var(--radius-pill);
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition-fast);
}

.btn-chrome {
  background: #10b981;
  color: #ffffff;
}

.btn-chrome:hover {
  background: #059669;
}

.btn-firefox {
  background: #f97316;
  color: #ffffff;
}

.btn-firefox:hover {
  background: #ea580c;
}

.btn-website {
  background: var(--accent-blue);
  color: #ffffff;
}

.btn-website:hover {
  background: #2563eb;
}

.btn-github {
  background: #334155;
  color: #ffffff;
}

.btn-github:hover {
  background: #475569;
}

.btn-share {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  font-size: 0.82rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition-fast);
}

.btn-share:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 40px 20px;
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-container {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: center;
}

.footer-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: center;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition-fast);
}

.footer-links a:hover {
  color: var(--accent-cyan);
}

/* ==========================================================================
   Toast Notification
   ========================================================================== */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: #1e293b;
  color: #ffffff;
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.88rem;
  font-weight: 500;
  z-index: 2000;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
  opacity: 0;
  pointer-events: none;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1080px) {
  .tools-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .header {
    padding: 40px 16px 32px;
  }

  .header h1 {
    font-size: 2.1rem;
  }

  .tools-grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .modal-container {
    max-height: 94vh;
  }

  .modal-header {
    padding: 18px 20px 12px;
  }

  .modal-body {
    padding: 18px 20px;
  }

  .modal-footer {
    padding: 14px 20px;
  }
}

@media (max-width: 640px) {
  .features-tagline {
    gap: 6px 12px;
    font-size: 0.8rem;
  }

  .header-lead {
    white-space: normal;
    font-size: 1rem;
  }

  .modal-gallery {
    flex-direction: column;
    gap: 12px;
  }

  .modal-gallery img,
  .modal-gallery img:not(:only-child) {
    max-width: 100%;
    max-height: 240px;
  }
}