/* Page-specific styles for aquarium-tools.html */
  #tools-page-root {
    --deep: #0D1026;
    --deep-2: #171B3D;
    --deep-3: #06070F;
    --leaf: #35AD51;
    --leaf-dark: #248238;
    --leaf-light: #8FD9A1;
    --sand: #F6F1E6;
    --sand-line: #E1D8C4;
    --ink: #12142A;
    --ink-soft: #565A72;
    --paper: #FFFFFF;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    color: var(--ink);
    background: var(--paper);
  }
  #tools-page-root *{ box-sizing: border-box; }
  #tools-page-root h1, #tools-page-root h2, #tools-page-root h3, #tools-page-root h4 {
    font-family: 'Fraunces', Georgia, serif; font-weight: 600; letter-spacing: -0.01em; color: var(--deep); margin: 0;
  }
  #tools-page-root a { text-decoration: none; }
  #tools-page-root section { padding: 60px 40px; display: block !important; }
  #tools-page-root .kicker {
    display: inline-flex; align-items: center; gap: 8px;
    font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .07em;
    color: var(--leaf-dark); margin: 0 0 16px; background: rgba(53,173,81,0.12); padding: 7px 14px 7px 10px; border-radius: 20px;
  }
  #tools-page-root .kicker::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--leaf); }
  #tools-page-root .btn {
    display: inline-flex; align-items: center; gap: 9px; padding: 13px 24px; border-radius: 12px;
    font-weight: 700; font-size: 14px; cursor: pointer; border: none; transition: transform .15s ease, box-shadow .15s ease;
    font-family: 'Inter', sans-serif;
  }
  #tools-page-root .btn svg { width: 15px; height: 15px; flex: none; }
  #tools-page-root .btn-primary {
    background: linear-gradient(135deg, var(--leaf) 0%, var(--leaf-dark) 100%); color: #fff;
    box-shadow: 0 10px 22px -8px rgba(36,130,56,0.5);
  }
  #tools-page-root .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 26px -8px rgba(36,130,56,0.55); }
  #tools-page-root .btn-outline { background: var(--paper); color: var(--deep); border: 1.5px solid var(--sand-line); }
  #tools-page-root .btn-outline:hover { border-color: var(--leaf); color: var(--leaf-dark); }

  /* ============ PAGE HEADER ============ */
  #tools-page-root .page-header {
    position: relative; overflow: hidden;
    background: radial-gradient(130% 150% at 20% 0%, #142542 0%, var(--deep) 45%, var(--deep-3) 100%);
    padding: 76px 40px 36px; text-align: center;
  }
  #tools-page-root .page-header h1 { font-size: clamp(28px, 4vw, 42px); color: #fff; line-height: 1.2; }
  #tools-page-root .page-header p { max-width: 600px; margin: 16px auto 0; color: #B9C1D6; font-size: 14.5px; line-height: 1.7; }

  /* ============ TAB BAR ============ */
  #tools-page-root .tab-section { background: var(--sand); padding: 26px 40px; position: sticky; top: 92px; z-index: 20; border-bottom: 1px solid var(--sand-line); }
  #tools-page-root .tab-bar { max-width: 1100px; margin: 0 auto; display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
  #tools-page-root .tab-btn {
    font-family: 'Inter', sans-serif; font-size: 13px; font-weight: 700; color: var(--ink-soft);
    background: var(--paper); border: 1px solid var(--sand-line); padding: 10px 18px; border-radius: 20px;
    cursor: pointer; transition: background .15s ease, color .15s ease, border-color .15s ease;
    display: inline-flex; align-items: center; gap: 7px;
  }
  #tools-page-root .tab-btn svg { width: 15px; height: 15px; }
  #tools-page-root .tab-btn:hover { border-color: var(--leaf); color: var(--leaf-dark); }
  #tools-page-root .tab-btn.active { background: var(--deep); border-color: var(--deep); color: #fff; }

  .tool-hidden { display: none !important; }
  #tools-page-root section.tool-hidden { display: none !important; }

  /* ============ SHARED TOOL HEAD ============ */
  #tools-page-root .tool-head { max-width: 680px; margin: 0 auto 36px; text-align: center; }
  #tools-page-root .tool-head h2 { font-size: clamp(24px, 3.2vw, 30px); }
  #tools-page-root .tool-head p { font-size: 14px; color: var(--ink-soft); margin: 12px auto 0; line-height: 1.7; max-width: 520px; }
  #tools-page-root .tool-panel { background: var(--paper); }
  #tools-page-root .tool-panel:nth-of-type(even) { background: var(--sand); }
  #tools-page-root .tool-card {
    max-width: 720px; margin: 0 auto; background: var(--paper); border: 1px solid var(--sand-line); border-radius: 20px;
    padding: 36px; box-shadow: 0 1px 2px rgba(11,59,76,0.03), 0 14px 30px -22px rgba(11,59,76,0.18);
  }

  /* ============ QUIZ (shared: fish quiz + aquascape quiz) ============ */
  #tools-page-root .quiz-progress { display: flex; gap: 6px; margin-bottom: 26px; justify-content: center; }
  #tools-page-root .quiz-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--sand-line); transition: background .2s ease, transform .2s ease; }
  #tools-page-root .quiz-dot.done { background: var(--leaf); }
  #tools-page-root .quiz-dot.current { background: var(--deep); transform: scale(1.3); }
  #tools-page-root .quiz-q { font-size: 18px; text-align: center; margin-bottom: 22px; }
  #tools-page-root .quiz-options { display: flex; flex-direction: column; gap: 10px; }
  #tools-page-root .quiz-opt {
    font-family: 'Inter', sans-serif; text-align: left; font-size: 14px; font-weight: 600; color: var(--ink);
    background: var(--sand); border: 1.5px solid var(--sand-line); border-radius: 12px; padding: 14px 18px;
    cursor: pointer; transition: border-color .15s ease, background .15s ease;
    display: flex; align-items: center; justify-content: space-between;
  }
  #tools-page-root .quiz-opt:hover { border-color: var(--leaf); background: #EAF3DE; }
  #tools-page-root .quiz-opt svg { width: 16px; height: 16px; color: var(--leaf-dark); flex: none; opacity: 0; }
  #tools-page-root .quiz-back { text-align: center; margin-top: 18px; }
  #tools-page-root .quiz-back button {
    background: none; border: none; font-family: 'Inter', sans-serif; font-size: 12.5px; color: var(--ink-soft);
    cursor: pointer; font-weight: 600;
  }
  #tools-page-root .quiz-back button:hover { color: var(--leaf-dark); }

  #tools-page-root .quiz-results { text-align: center; }
  #tools-page-root .quiz-results h3 { font-size: 20px; margin-bottom: 6px; }
  #tools-page-root .quiz-results .quiz-results-sub { font-size: 13.5px; color: var(--ink-soft); margin-bottom: 26px; }
  #tools-page-root .result-cards { display: flex; flex-direction: column; gap: 12px; text-align: left; margin-bottom: 24px; }
  #tools-page-root .result-card {
    display: flex; gap: 14px; align-items: flex-start; background: var(--sand); border-radius: 14px; padding: 16px 18px;
  }
  #tools-page-root .result-icon {
    flex: none; width: 40px; height: 40px; border-radius: 11px; background: #EAF3DE; color: var(--leaf-dark);
    display: flex; align-items: center; justify-content: center;
  }
  #tools-page-root .result-icon svg { width: 19px; height: 19px; }
  #tools-page-root .result-card h4 { font-size: 14.5px; margin-bottom: 3px; }
  #tools-page-root .result-card .result-sci { font-style: italic; font-size: 11.5px; color: var(--ink-soft); display: block; margin-bottom: 6px; }
  #tools-page-root .result-card p { font-size: 12.8px; color: var(--ink-soft); line-height: 1.55; margin: 0; }

  /* ============ STOCKING CALCULATOR ============ */
  #tools-page-root .calc-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-bottom: 24px; }
  #tools-page-root .calc-field label { display: block; font-size: 12px; font-weight: 700; color: var(--ink-soft); margin-bottom: 6px; text-transform: uppercase; letter-spacing: .03em; }
  #tools-page-root .calc-field input {
    width: 100%; font-family: 'Inter', sans-serif; font-size: 15px; padding: 12px 14px; border-radius: 10px;
    border: 1.5px solid var(--sand-line); background: var(--sand); color: var(--ink);
  }
  #tools-page-root .calc-field input:focus { outline: none; border-color: var(--leaf); }
  #tools-page-root .calc-field select {
    width: 100%; font-family: 'Inter', sans-serif; font-size: 14.5px; padding: 12px 14px; border-radius: 10px;
    border: 1.5px solid var(--sand-line); background: var(--sand); color: var(--ink); cursor: pointer;
    appearance: none; -webkit-appearance: none; -moz-appearance: none;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23565A72' stroke-width='2.5'><path d='M6 9l6 6 6-6'/></svg>");
    background-repeat: no-repeat; background-position: right 12px center; background-size: 16px;
    padding-right: 38px;
  }
  #tools-page-root .calc-field select:focus { outline: none; border-color: var(--leaf); }
  #tools-page-root .calc-result {
    background: var(--deep); border-radius: 16px; padding: 26px 28px; color: #fff; text-align: center; margin-bottom: 20px;
  }
  #tools-page-root .calc-vol { font-family: 'Fraunces', Georgia, serif; font-size: 40px; font-weight: 700; color: var(--leaf-light); line-height: 1; }
  #tools-page-root .calc-vol-sub { font-size: 12.5px; color: #B9C1D6; margin-top: 6px; }
  #tools-page-root .calc-guideline { font-size: 13px; color: var(--ink-soft); line-height: 1.7; text-align: center; margin-bottom: 20px; }
  #tools-page-root .calc-guideline strong { color: var(--ink); }
  #tools-page-root .calc-examples { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
  #tools-page-root .calc-example { background: var(--sand); border-radius: 12px; padding: 14px; text-align: center; }
  #tools-page-root .calc-example .num { font-family: 'Fraunces', Georgia, serif; font-size: 24px; color: var(--leaf-dark); font-weight: 700; }
  #tools-page-root .calc-example .label { font-size: 11px; color: var(--ink-soft); margin-top: 4px; }
  #tools-page-root .calc-example .calc-min-hint { font-size: 10.5px; color: #C4552E; font-weight: 700; margin-top: 6px; display: none; }
  #tools-page-root .calc-example.too-small { background: #FBE9E3; }
  #tools-page-root .calc-example.too-small .num { color: #C4552E; }
  #tools-page-root .calc-example.too-small .calc-min-hint { display: block; }
  @media (max-width: 560px) {
    #tools-page-root .calc-grid { grid-template-columns: 1fr; }
    #tools-page-root .calc-examples { grid-template-columns: 1fr 1fr; }
  }

  /* ============ COMPATIBILITY CHECKER ============ */
  #tools-page-root .compat-grid { display: grid; grid-template-columns: 1fr auto 1fr; gap: 14px; align-items: end; margin-bottom: 24px; }
  #tools-page-root .compat-field label { display: block; font-size: 12px; font-weight: 700; color: var(--ink-soft); margin-bottom: 6px; text-transform: uppercase; letter-spacing: .03em; }
  #tools-page-root .compat-field select {
    width: 100%; font-family: 'Inter', sans-serif; font-size: 14px; padding: 12px 14px; border-radius: 10px;
    border: 1.5px solid var(--sand-line); background: var(--sand); color: var(--ink); cursor: pointer;
  }
  #tools-page-root .compat-field select:focus { outline: none; border-color: var(--leaf); }
  #tools-page-root .compat-vs { font-family: 'Fraunces', Georgia, serif; font-size: 14px; color: var(--ink-soft); padding-bottom: 12px; }
  #tools-page-root .compat-verdict { border-radius: 16px; padding: 24px 26px; text-align: center; display: none; }
  #tools-page-root .compat-verdict.show { display: block; }
  #tools-page-root .compat-verdict.compatible { background: #EAF3DE; }
  #tools-page-root .compat-verdict.caution { background: #FDF1DC; }
  #tools-page-root .compat-verdict.avoid { background: #FBE9E3; }
  #tools-page-root .compat-badge { font-size: 12px; font-weight: 800; text-transform: uppercase; letter-spacing: .05em; margin-bottom: 8px; display: inline-block; padding: 5px 14px; border-radius: 14px; }
  #tools-page-root .compat-verdict.compatible .compat-badge { background: var(--leaf); color: #fff; }
  #tools-page-root .compat-verdict.caution .compat-badge { background: #C7871B; color: #fff; }
  #tools-page-root .compat-verdict.avoid .compat-badge { background: #C4552E; color: #fff; }
  #tools-page-root .compat-verdict p { font-size: 13.5px; color: var(--ink); line-height: 1.6; margin: 0; }
  @media (max-width: 560px) {
    #tools-page-root .compat-grid { grid-template-columns: 1fr; }
    #tools-page-root .compat-vs { text-align: center; padding: 0; }
  }

  /* ============ AQUASCAPE STYLE RESULT ============ */
  #tools-page-root .style-result { text-align: center; }
  #tools-page-root .style-badge {
    width: 64px; height: 64px; border-radius: 50%; margin: 0 auto 18px; display: flex; align-items: center; justify-content: center;
    background: linear-gradient(135deg, var(--leaf) 0%, var(--leaf-dark) 100%); color: #fff;
  }
  #tools-page-root .style-badge svg { width: 28px; height: 28px; }
  #tools-page-root .style-result h3 { font-size: 24px; margin-bottom: 10px; }
  #tools-page-root .style-result p { font-size: 14px; color: var(--ink-soft); line-height: 1.75; max-width: 500px; margin: 0 auto 20px; }
  #tools-page-root .style-tags { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; margin-bottom: 26px; }
  #tools-page-root .style-tag { font-size: 11.5px; font-weight: 700; background: var(--sand); color: var(--leaf-dark); padding: 6px 13px; border-radius: 14px; }

  /* ============ FISH/PLANT OF THE DAY ============ */
  #tools-page-root .fotd-card {
    max-width: 560px; margin: 0 auto; background: var(--deep); border-radius: 22px; padding: 40px; color: #fff; text-align: center;
    box-shadow: 0 24px 50px -24px rgba(13,16,38,0.5);
  }
  #tools-page-root .fotd-icon {
    width: 64px; height: 64px; border-radius: 50%; margin: 0 auto 20px; display: flex; align-items: center; justify-content: center;
    background: rgba(143,217,161,0.15); color: var(--leaf-light);
  }
  #tools-page-root .fotd-icon svg { width: 28px; height: 28px; }
  #tools-page-root .fotd-badge { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: var(--leaf-light); margin-bottom: 10px; }
  #tools-page-root .fotd-card h3 { color: #fff; font-size: 24px; margin-bottom: 4px; }
  #tools-page-root .fotd-sci { font-style: italic; font-size: 13px; color: #AEB4CC; display: block; margin-bottom: 18px; }
  #tools-page-root .fotd-card p { font-size: 14px; color: #D6DAEA; line-height: 1.7; margin: 0 0 24px; }
  #tools-page-root .fotd-actions { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
  #tools-page-root .btn-ghost { background: rgba(255,255,255,0.1); color: #fff; border: 1.5px solid rgba(255,255,255,0.3); }
  #tools-page-root .btn-ghost:hover { background: rgba(255,255,255,0.18); transform: translateY(-2px); }