/* ==========================================================
     DEEP WATER RESEARCH ARCHIVES
     Indiana Jones / Archaeological Field Office Theme
     ========================================================== */

  :root {
    --ink-dark: #3D2B1F;
    --ink-medium: #7B5E3A;
    --ink-light: #A88557;
    --gold: #C9A96E;
    --parchment: #F5E6C8;
    --parchment-aged: #E8D5A3;
    --parchment-dark: #D9BF7E;
    --seal-red: #8B2020;
    --seal-red-dark: #5E1313;
    --shadow-warm: rgba(61, 43, 31, 0.35);
    --shadow-deep: rgba(61, 43, 31, 0.6);

    --font-stamp: 'Special Elite', 'Courier New', monospace;
    --font-body: 'Courier Prime', 'Courier New', monospace;
    --font-label: 'Oswald', 'Arial Narrow', sans-serif;
  }

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

  html, body {
    min-height: 100%;
  }

  body {
    font-family: var(--font-body);
    color: var(--ink-dark);
    line-height: 1.55;
    /* Parchment base: layered radial + linear gradients + dot grid */
    background-color: var(--parchment);
    background-image:
      /* Coffee stains / aging blotches */
      radial-gradient(ellipse 900px 600px at 15% 10%, rgba(139, 90, 43, 0.12), transparent 60%),
      radial-gradient(ellipse 700px 500px at 85% 30%, rgba(94, 50, 20, 0.10), transparent 60%),
      radial-gradient(ellipse 800px 500px at 50% 80%, rgba(139, 90, 43, 0.08), transparent 60%),
      radial-gradient(ellipse 400px 300px at 90% 95%, rgba(94, 50, 20, 0.12), transparent 60%),
      /* Cross-hatch fiber pattern */
      repeating-linear-gradient(45deg,
        rgba(123, 94, 58, 0.04) 0px,
        rgba(123, 94, 58, 0.04) 1px,
        transparent 1px,
        transparent 4px),
      repeating-linear-gradient(-45deg,
        rgba(123, 94, 58, 0.04) 0px,
        rgba(123, 94, 58, 0.04) 1px,
        transparent 1px,
        transparent 4px),
      /* Dot grid paper */
      radial-gradient(circle at 1px 1px, rgba(61, 43, 31, 0.08) 1px, transparent 1.5px),
      /* Base vignette */
      linear-gradient(135deg, var(--parchment) 0%, var(--parchment-aged) 100%);
    background-size:
      100% 100%,
      100% 100%,
      100% 100%,
      100% 100%,
      auto,
      auto,
      18px 18px,
      100% 100%;
    background-attachment: fixed;
    position: relative;
    overflow-x: hidden;
  }

  /* Global film grain / noise overlay */
  body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 1;
    opacity: 0.5;
    mix-blend-mode: multiply;
    background-image:
      radial-gradient(circle at 23% 47%, rgba(61,43,31,0.08) 0, transparent 2px),
      radial-gradient(circle at 78% 12%, rgba(61,43,31,0.10) 0, transparent 2px),
      radial-gradient(circle at 42% 88%, rgba(61,43,31,0.06) 0, transparent 2px),
      radial-gradient(circle at 8% 72%, rgba(61,43,31,0.09) 0, transparent 2px),
      radial-gradient(circle at 95% 55%, rgba(61,43,31,0.07) 0, transparent 2px),
      repeating-radial-gradient(circle at 50% 50%,
        rgba(61,43,31,0.03) 0,
        rgba(61,43,31,0.03) 1px,
        transparent 1px,
        transparent 3px);
    background-size: 100% 100%, 100% 100%, 100% 100%, 100% 100%, 100% 100%, 5px 5px;
  }

  /* Top and bottom aged edges */
  body::after {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 2;
    background:
      linear-gradient(180deg, rgba(61, 43, 31, 0.25) 0%, transparent 8%, transparent 92%, rgba(61, 43, 31, 0.25) 100%),
      linear-gradient(90deg, rgba(61, 43, 31, 0.15) 0%, transparent 5%, transparent 95%, rgba(61, 43, 31, 0.15) 100%);
  }

  .page {
    position: relative;
    z-index: 3;
    max-width: 1400px;
    margin: 0 auto;
    padding: 40px 32px 80px;
  }

  /* ==========================================================
     HEADER / HERO
     ========================================================== */

  .header {
    position: relative;
    padding: 48px 24px 56px;
    text-align: center;
    border: 3px double var(--ink-dark);
    background:
      radial-gradient(ellipse at top, rgba(201, 169, 110, 0.3), transparent 70%),
      linear-gradient(180deg, var(--parchment-aged), var(--parchment) 60%);
    box-shadow:
      inset 0 0 80px rgba(94, 50, 20, 0.18),
      inset 0 0 0 8px var(--parchment),
      inset 0 0 0 9px var(--ink-dark),
      0 4px 24px var(--shadow-warm);
    overflow: hidden;
  }

  /* Stamp marks in corners */
  .header::before {
    content: "TOP SECRET";
    position: absolute;
    top: 28px;
    left: 28px;
    font-family: var(--font-label);
    font-weight: 700;
    font-size: 13px;
    letter-spacing: 2px;
    color: var(--seal-red);
    border: 2px solid var(--seal-red);
    padding: 4px 10px;
    transform: rotate(-8deg);
    opacity: 0.8;
    background: rgba(245, 230, 200, 0.4);
  }

  .header::after {
    content: "FILE № DW-2026-001";
    position: absolute;
    top: 28px;
    right: 28px;
    font-family: var(--font-stamp);
    font-size: 12px;
    color: var(--ink-medium);
    letter-spacing: 1px;
    border-bottom: 1px solid var(--ink-medium);
    padding-bottom: 2px;
  }

  .header-kicker {
    display: inline-block;
    font-family: var(--font-label);
    font-size: 13px;
    letter-spacing: 5px;
    color: var(--ink-medium);
    margin-bottom: 18px;
    padding: 6px 18px;
    border: 1px dashed var(--ink-medium);
    text-transform: uppercase;
  }

  .header h1 {
    font-family: var(--font-stamp);
    font-size: clamp(32px, 6.5vw, 72px);
    font-weight: 400;
    line-height: 1.05;
    color: var(--ink-dark);
    letter-spacing: 2px;
    text-shadow:
      2px 2px 0 rgba(139, 32, 32, 0.15),
      -1px -1px 0 rgba(255, 255, 255, 0.3);
    margin-bottom: 16px;
    position: relative;
  }

  .header h1 .amp {
    color: var(--seal-red);
    font-style: italic;
  }

  .header h2.subtitle {
    font-family: var(--font-body);
    font-style: italic;
    font-size: clamp(14px, 2vw, 20px);
    font-weight: 400;
    color: var(--ink-medium);
    margin-bottom: 28px;
    letter-spacing: 1px;
  }

  /* Red tape ribbon divider */
  .ribbon {
    position: relative;
    height: 22px;
    margin: 18px auto 32px;
    max-width: 640px;
    background:
      repeating-linear-gradient(45deg,
        var(--seal-red) 0px,
        var(--seal-red) 12px,
        var(--seal-red-dark) 12px,
        var(--seal-red-dark) 24px);
    box-shadow:
      0 2px 6px rgba(94, 19, 19, 0.4),
      inset 0 0 0 1px rgba(0, 0, 0, 0.2),
      inset 0 1px 0 rgba(255, 255, 255, 0.15);
    transform: rotate(-0.5deg);
  }

  .ribbon::before,
  .ribbon::after {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    width: 14px;
    background: var(--parchment);
  }
  .ribbon::before {
    left: -7px;
    clip-path: polygon(0 0, 100% 0, 50% 50%, 100% 100%, 0 100%);
  }
  .ribbon::after {
    right: -7px;
    clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%, 50% 50%);
  }

  /* Stats bar */
  .stats-bar {
    display: flex;
    justify-content: center;
    gap: 36px;
    flex-wrap: wrap;
    font-family: var(--font-label);
    font-size: 13px;
    letter-spacing: 2px;
    color: var(--ink-dark);
    text-transform: uppercase;
    margin: 28px 0 36px;
  }

  .stats-bar .stat {
    display: flex;
    align-items: baseline;
    gap: 10px;
  }
  .stats-bar .stat strong {
    font-family: var(--font-stamp);
    font-size: 22px;
    font-weight: 400;
    color: var(--seal-red);
    letter-spacing: 1px;
  }
  .stats-bar .divider {
    color: var(--ink-medium);
    opacity: 0.5;
  }

  /* Search box */
  .search-wrap {
    position: relative;
    max-width: 640px;
    margin: 24px auto 0;
  }

  .search-box {
    width: 100%;
    font-family: var(--font-stamp);
    font-size: 17px;
    padding: 18px 26px 18px 64px;
    background: var(--parchment);
    color: var(--ink-dark);
    border: 2px solid var(--ink-dark);
    outline: none;
    box-shadow:
      inset 0 0 0 1px var(--parchment),
      inset 0 0 0 2px var(--ink-medium),
      inset 0 2px 8px rgba(94, 50, 20, 0.2),
      0 3px 0 var(--ink-dark),
      0 6px 14px var(--shadow-warm);
    letter-spacing: 1px;
  }
  .search-box::placeholder {
    color: var(--ink-medium);
    font-style: italic;
    opacity: 0.75;
  }
  .search-box:focus {
    background: #FBF0D3;
    box-shadow:
      inset 0 0 0 1px var(--parchment),
      inset 0 0 0 2px var(--seal-red),
      inset 0 2px 8px rgba(94, 50, 20, 0.2),
      0 3px 0 var(--seal-red-dark),
      0 6px 14px var(--shadow-warm);
  }

  /* Brass loupe magnifying glass */
  .loupe {
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    width: 32px;
    height: 32px;
    pointer-events: none;
  }
  .loupe::before {
    content: "";
    position: absolute;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    border: 3px solid #6B4423;
    background:
      radial-gradient(circle at 30% 30%, rgba(255, 248, 220, 0.85), rgba(201, 169, 110, 0.4) 50%, rgba(139, 90, 43, 0.2) 100%);
    top: 0;
    left: 0;
    box-shadow:
      0 0 0 1px #8B6B3A,
      inset 0 0 6px rgba(94, 50, 20, 0.3);
  }
  .loupe::after {
    content: "";
    position: absolute;
    width: 12px;
    height: 4px;
    background: linear-gradient(180deg, #8B6B3A, #6B4423);
    bottom: 2px;
    right: 0;
    transform: rotate(45deg);
    transform-origin: left center;
    border-radius: 0 2px 2px 0;
    box-shadow: 0 1px 2px rgba(0,0,0,0.4);
  }

  /* ==========================================================
     FILTER BAR / SORT BAR
     ========================================================== */

  .controls {
    margin: 48px 0 36px;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    flex-wrap: wrap;
    gap: 24px;
    padding-bottom: 4px;
    border-bottom: 2px dashed var(--ink-medium);
  }

  .filter-tabs {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
    align-items: flex-end;
  }

  .filter-tabs .tab {
    font-family: var(--font-label);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    padding: 12px 20px 10px;
    background: var(--parchment-aged);
    color: var(--ink-medium);
    border: 2px solid var(--ink-dark);
    border-bottom: none;
    border-radius: 8px 8px 0 0;
    cursor: pointer;
    position: relative;
    margin-bottom: -2px;
    transition: transform 0.2s ease, background 0.2s ease;
    box-shadow: inset 0 8px 14px rgba(94, 50, 20, 0.08);
  }
  .filter-tabs .tab:hover {
    background: var(--parchment);
    color: var(--ink-dark);
    transform: translateY(-2px);
  }
  .filter-tabs .tab.active {
    background: var(--parchment);
    color: var(--seal-red);
    transform: translateY(-4px);
    box-shadow:
      inset 0 8px 14px rgba(94, 50, 20, 0.04),
      0 -3px 8px var(--shadow-warm);
  }
  .filter-tabs .tab.active::after {
    content: "";
    position: absolute;
    left: 50%;
    top: 6px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--seal-red);
    transform: translateX(-50%);
    box-shadow: 0 0 0 2px var(--parchment);
  }

  .sort-bar {
    display: flex;
    align-items: center;
    gap: 14px;
    font-family: var(--font-label);
    font-size: 12px;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--ink-medium);
    padding-bottom: 10px;
  }
  .sort-bar .label {
    opacity: 0.7;
  }
  .sort-bar .sort-link {
    color: var(--ink-dark);
    cursor: pointer;
    padding-bottom: 2px;
    border-bottom: 1px dotted transparent;
    transition: border-color 0.2s ease, color 0.2s ease;
  }
  .sort-bar .sort-link:hover {
    border-color: var(--seal-red);
    color: var(--seal-red);
  }
  .sort-bar .sort-link.active {
    color: var(--seal-red);
    border-color: var(--seal-red);
  }
  .sort-bar .sep {
    opacity: 0.4;
  }