/* ===================================================================
   zekt-service-page.css
   Shared base for all Zekt component marketing pages (102).
   Each page's own CSS overrides --accent / --accent-rgb for theming.
   =================================================================== */

/* ===== CSS VARIABLES — default green (overridden per page) ===== */
    :root {
      --accent: #00ff88;
      --accent-rgb: 0, 255, 136;
    }

/* ===== RESET & BASE ===== */
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
      background-color: #0a0a0a;
      color: #e0e0e0;
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
      display: flex;
      flex-direction: column;
      min-height: 100vh;
    }

/* ===== CONTAINER ===== */
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
      width: 100%;
    }

/* ===== HEADER ===== */
    header {
      background: linear-gradient(135deg, #111111 0%, #0d0d0d 100%);
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      padding: 16px 0;
    }

    .header-content {
      display: flex;
      align-items: center;
    }

    .header-info {
      flex: 1;
    }

    .header-title-row {
      display: flex;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
    }

    .header-title-row h1 {
      font-size: 1.75rem;
      font-weight: 700;
      color: var(--accent);
      text-shadow: 0 0 40px rgba(var(--accent-rgb), 0.2);
      margin: 0;
    }

    .back-button {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 8px 16px;
      border-radius: 8px;
      border: 1px solid #333;
      color: #b3b3b3;
      text-decoration: none;
      font-size: 0.85rem;
      transition: border-color 0.2s, color 0.2s, background 0.2s;
      margin-left: auto;
      white-space: nowrap;
    }

    .back-button:hover {
      border-color: var(--accent);
      color: var(--accent);
      background: rgba(var(--accent-rgb), 0.05);
    }

    .header-subtitle {
      margin: 6px 0 0 0;
      font-size: 0.95rem;
      color: #ff9900;
    }

/* ===== MAIN ===== */
    main {
      flex: 1;
      padding: 48px 0 72px;
    }

    main a:link,
    main a:visited {
      color: var(--accent);
    }

    main a:hover {
      opacity: 0.8;
    }

/* ===== HERO SECTION ===== */
    .hero-section {
      text-align: center;
      margin-bottom: 64px;
    }

    .tier-badge {
      display: inline-block;
      padding: 4px 14px;
      border-radius: 20px;
      font-size: 0.75rem;
      font-weight: 600;
      letter-spacing: 0.5px;
      text-transform: uppercase;
      margin-bottom: 20px;
      border: 1px solid rgba(var(--accent-rgb), 0.4);
      color: var(--accent);
      background: rgba(var(--accent-rgb), 0.08);
    }

    .hero-headline {
      font-size: 2.4rem;
      font-weight: 700;
      color: #ffffff;
      line-height: 1.25;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }

    .hero-headline .accent {
      color: var(--accent);
    }

    .hero-tagline {
      font-size: 1.1rem;
      color: #999;
      max-width: 640px;
      margin: 0 auto 28px;
      line-height: 1.65;
    }

    .hero-price {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      padding: 10px 20px;
      border-radius: 10px;
      background: rgba(var(--accent-rgb), 0.06);
      border: 1px solid rgba(var(--accent-rgb), 0.2);
      font-size: 0.95rem;
    }

    .hero-price .price-label {
      color: #808080;
    }

    .hero-price .price-value {
      color: var(--accent);
      font-weight: 600;
      font-family: 'JetBrains Mono', 'Courier New', monospace;
    }

    .hero-requires {
      margin-top: 10px;
      font-size: 0.8rem;
      color: #555;
    }

    .hero-requires a {
      color: #555;
      text-decoration: underline;
      text-decoration-color: #444;
      transition: color 0.2s;
    }

    .hero-requires a:hover {
      color: var(--accent);
    }

/* ===== SECTION HEADINGS ===== */
    .section-heading {
      font-size: 1.4rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 8px;
    }

    .section-subheading {
      font-size: 0.95rem;
      color: #ff9900;
      margin-bottom: 32px;
    }

/* ===== FLIP CARDS GRID ===== */
    .flip-cards-section {
      margin-bottom: 72px;
    }

    .flip-cards-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
      gap: 20px;
    }

    /* Each flip card wrapper */
    .flip-card {
      perspective: 1200px;
      height: 300px;
      cursor: pointer;
      position: relative;
      z-index: 1;
      transform-origin: top center;
      transition: transform 0.65s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .flip-card.flipped {
      transform: scaleX(2) scaleY(1.8);
      z-index: 100;
    }

    .flip-card-inner {
      position: relative;
      width: 100%;
      height: 100%;
      transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
      transform-style: preserve-3d;
    }

    .flip-card.flipped .flip-card-inner {
      transform: rotateY(180deg) scaleX(0.5) scaleY(0.5556);
    }

    .flip-card.flipped .flip-card-back {
      overflow: visible;
    }

    .flip-card.flipped .back-body {
      overflow-y: visible;
    }

    .flip-card-front,
    .flip-card-back {
      position: absolute;
      width: 100%;
      height: 100%;
      backface-visibility: hidden;
      -webkit-backface-visibility: hidden;
      border-radius: 14px;
      border: 1px solid #222;
      overflow: hidden;
    }

/* ===== CARD FRONT ===== */
    .flip-card-front {
      background: #111;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      padding: 2rem 1.75rem;
      text-align: center;
      transition: border-color 0.3s, box-shadow 0.3s;
    }

    .flip-card:hover .flip-card-front {
      border-color: rgba(var(--accent-rgb), 0.3);
      box-shadow: 0 0 28px rgba(var(--accent-rgb), 0.07);
    }

    .card-icon {
      width: 52px;
      height: 52px;
      border-radius: 12px;
      background: rgba(var(--accent-rgb), 0.08);
      border: 1px solid rgba(var(--accent-rgb), 0.18);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 1.1rem;
      color: var(--accent);
      transition: background 0.3s, border-color 0.3s;
    }

    .flip-card:hover .card-icon {
      background: rgba(var(--accent-rgb), 0.14);
      border-color: rgba(var(--accent-rgb), 0.35);
    }

    .card-icon .material-icons {
      font-size: 26px;
    }

    .card-title {
      font-size: 1.05rem;
      font-weight: 600;
      color: #ffffff;
      margin-bottom: 8px;
    }

    .card-summary {
      font-size: 0.85rem;
      color: #888;
      line-height: 1.5;
    }

    .flip-hint {
      position: absolute;
      bottom: 12px;
      right: 14px;
      display: flex;
      align-items: center;
      gap: 4px;
      font-size: 0.68rem;
      color: rgba(255, 255, 255, 0.3);
      transition: color 0.3s;
      pointer-events: none;
    }

    .flip-card:hover .flip-hint {
      color: rgba(255, 255, 255, 0.75);
    }

    .flip-hint .material-icons {
      font-size: 12px;
    }

/* ===== CARD BACK ===== */
    .flip-card-back {
      transform: rotateY(180deg);
      background: linear-gradient(160deg, #111 0%, #0e1a12 100%);
      border-color: rgba(var(--accent-rgb), 0.18);
      display: flex;
      flex-direction: column;
      padding: 1.5rem;
    }

    .back-title {
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--accent);
      margin-bottom: 10px;
      padding-bottom: 10px;
      border-bottom: 1px solid rgba(var(--accent-rgb), 0.15);
    }

    .back-body {
      flex: 1;
      font-size: 0.83rem;
      color: #aaa;
      line-height: 1.6;
      overflow-y: auto;
    }

    .back-body strong {
      color: #ddd;
    }

    .back-body ul {
      padding-left: 1.2rem;
      margin-top: 6px;
    }

    .back-body ul li {
      margin-bottom: 4px;
    }

    .back-flip-hint {
      margin-top: 10px;
      text-align: center;
      font-size: 0.68rem;
      color: rgba(255, 255, 255, 0.3);
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 4px;
    }

    .back-flip-hint .material-icons {
      font-size: 12px;
    }

/* ===== COMBINATIONS SECTION ===== */
    .combos-section {
      margin-bottom: 56px;
    }

    .combos-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }

    .combo-panel {
      background: #111;
      border: 1px solid #222;
      border-radius: 12px;
      padding: 24px;
    }

    .combo-panel.combo-use {
      border-color: rgba(var(--accent-rgb), 0.18);
    }

    .combo-panel h4 {
      font-size: 0.85rem;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      color: var(--accent);
      margin-bottom: 14px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .combo-panel h4 .material-icons {
      font-size: 16px;
    }

    .combo-panel ul {
      list-style: none;
      padding: 0;
    }

    .combo-panel ul li {
      font-size: 0.875rem;
      color: #aaa;
      padding: 7px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.04);
      line-height: 1.5;
    }

    .combo-panel ul li:last-child {
      border-bottom: none;
    }

    .combo-panel ul li strong {
      color: #ddd;
    }

    .combo-panel ul li a {
      color: var(--accent);
      text-decoration: none;
    }

    .combo-panel ul li a:hover {
      text-decoration: underline;
    }

/* ===== INCOMPATIBILITY PANEL ===== */
    .incompat-panel {
      background: rgba(255, 80, 80, 0.04);
      border: 1px solid rgba(255, 80, 80, 0.25);
      border-radius: 12px;
      padding: 24px;
      margin-bottom: 56px;
      display: flex;
      gap: 16px;
    }

    .incompat-icon {
      color: #ff5050;
      flex-shrink: 0;
      margin-top: 2px;
    }

    .incompat-icon .material-icons {
      font-size: 24px;
    }

    .incompat-content h4 {
      font-size: 0.95rem;
      font-weight: 700;
      color: #ff7070;
      margin-bottom: 10px;
    }

    .incompat-content p {
      font-size: 0.875rem;
      color: #999;
      line-height: 1.6;
      margin-bottom: 8px;
    }

    .incompat-content p:last-child {
      margin-bottom: 0;
    }

    .incompat-content a {
      color: #ff7070;
      text-decoration: underline;
      text-decoration-color: rgba(255, 112, 112, 0.4);
    }

    .incompat-content strong {
      color: #eee;
    }

/* ===== WHEN TO USE SECTION ===== */
    .when-section {
      margin-bottom: 56px;
    }

    .when-list {
      list-style: none;
      padding: 0;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .when-list li {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      font-size: 0.9rem;
      color: #aaa;
      line-height: 1.55;
    }

    .when-list li .material-icons {
      font-size: 18px;
      color: var(--accent);
      margin-top: 1px;
      flex-shrink: 0;
    }

/* ===== OPTIONAL NOTE (for zekt-action) ===== */
    .optional-note {
      display: flex;
      gap: 16px;
      background: rgba(var(--accent-rgb), 0.04);
      border: 1px solid rgba(var(--accent-rgb), 0.18);
      border-radius: 12px;
      padding: 24px;
      margin-bottom: 48px;
    }

    .optional-note .material-icons {
      font-size: 22px;
      color: var(--accent);
      flex-shrink: 0;
      margin-top: 2px;
    }

    .optional-note-body h4 {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--accent);
      margin-bottom: 8px;
    }

    .optional-note-body p {
      font-size: 0.875rem;
      color: #999;
      line-height: 1.6;
      margin-bottom: 6px;
    }

    .optional-note-body p:last-child {
      margin-bottom: 0;
    }

    .optional-note-body strong {
      color: #ddd;
    }

/* ===== CROSS-LINK CALLOUT ===== */
    .crosslink-callout {
      background: rgba(var(--accent-rgb), 0.05);
      border-left: 3px solid var(--accent);
      border-radius: 0 8px 8px 0;
      padding: 16px 20px;
      margin-top: 12px;
      font-size: 0.85rem;
      color: #999;
      line-height: 1.6;
    }

    .crosslink-callout strong {
      color: #ddd;
    }

    .crosslink-callout a {
      color: var(--accent);
      text-decoration: none;
    }

    .crosslink-callout a:hover {
      text-decoration: underline;
    }

/* ===== EXPLORE NEXT SECTION ===== */
    .explore-next {
      text-align: center;
      margin-bottom: 64px;
      padding: 40px 24px;
      border: 1px solid rgba(var(--accent-rgb), 0.15);
      border-radius: 16px;
      background: rgba(var(--accent-rgb), 0.03);
    }

    .explore-next-label {
      font-size: 0.8rem;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: #ffffff;
      margin-bottom: 12px;
    }

    .explore-next-btn,
    a.explore-next-btn:link,
    a.explore-next-btn:visited,
    main .explore-next-btn,
    main a.explore-next-btn:link,
    main a.explore-next-btn:visited {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      padding: 14px 32px;
      border-radius: 10px;
      background: var(--accent);
      color: #000;
      font-weight: 700;
      font-size: 1rem;
      text-decoration: none;
      transition: opacity 0.2s, box-shadow 0.2s;
      margin-bottom: 12px;
    }

    a.explore-next-btn:hover,
    main a.explore-next-btn:hover {
      opacity: 0.88;
      color: #000;
      box-shadow: 0 0 24px rgba(var(--accent-rgb), 0.35);
    }

    .explore-next-hint {
      font-size: 0.82rem;
      color: #ffffff;
    }

/* ===== FOOTER ===== */
    footer {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding: 48px 0 32px;
      margin-top: auto;
    }

    .footer-content {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
      gap: 32px;
      margin-bottom: 32px;
    }

    .footer-column h4 {
      font-size: 0.8rem;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      margin-bottom: 14px;
    }

    .footer-column ul {
      list-style: none;
      padding: 0;
    }

    .footer-column li {
      margin-bottom: 8px;
    }

    .footer-column a {
      color: #606060;
      text-decoration: none;
      font-size: 0.85rem;
      transition: color 0.2s;
    }

    .footer-column a:hover {
      color: #00ff88;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 0.8rem;
      color: #505050;
    }

    .footer-logo {
      font-size: 1.1rem;
      font-weight: 700;
      color: #00ff88;
      font-family: 'JetBrains Mono', 'Courier New', monospace;
    }

    .footer-bottom a {
      text-decoration: none;
      transition: color 0.2s;
    }

    .footer-bottom a:hover {
      color: #00ff88;
    }

/* ===== RESPONSIVE ===== */
    @media (max-width: 900px) {
      .combos-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .header-title-row h1 {
        font-size: 1.4rem;
      }

      .back-button {
        margin-left: 0;
      }

      .hero-headline {
        font-size: 1.8rem;
      }

      .flip-cards-grid {
        grid-template-columns: 1fr;
      }

      .flip-card {
        height: 280px;
      }

      main {
        padding: 32px 0 48px;
      }

      .footer-content {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 480px) {
      .flip-card {
        height: 300px;
      }

      .hero-headline {
        font-size: 1.5rem;
      }
    }