@layer tokens, reset, base, layout, components, journal, utilities;

@layer tokens {
  :root {
    --sdsl-bg: #fbf9f5;
    --sdsl-surface: #f3efe6;
    --sdsl-sheet: #ffffff;
    --sdsl-ink: #111c24;
    --sdsl-ink-soft: #2c3a47;
    --sdsl-muted: #525e69;
    --sdsl-viridian: #1b5e43;
    --sdsl-viridian-dark: #12422f;
    --sdsl-viridian-wash: #e8f3ee;
    --sdsl-ochre: #c2410c;
    --sdsl-ochre-hover: #9a3412;
    --sdsl-ochre-wash: #fef3c7;
    --sdsl-rule: #d6d3cd;
    --sdsl-rule-strong: #b8b3a8;
    --sdsl-warn-bg: #fff8eb;
    --sdsl-warn-border: #d97706;
    --sdsl-font-serif: 'Newsreader', Georgia, 'Times New Roman', serif;
    --sdsl-font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --sdsl-font-mono: 'JetBrains Mono', 'Consolas', monospace;
    --sdsl-max-w: 1220px;
    --sdsl-read-w: 840px;
    --sdsl-radius: 10px;
    --sdsl-radius-lg: 14px;
    --sdsl-shadow: 0 8px 26px rgba(17, 28, 36, 0.06);
  }
}

@layer reset {
  *, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
  html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    overflow-x: hidden;
  }
  body {
    background-color: var(--sdsl-bg);
    color: var(--sdsl-ink);
    font-family: var(--sdsl-font-sans);
    font-size: 1rem;
    line-height: 1.68;
    overflow-x: hidden;
    padding-bottom: 76px;
  }
  img, svg {
    max-width: 100%;
    height: auto;
    display: block;
  }
  table {
    border-collapse: collapse;
    width: 100%;
  }
  a {
    color: var(--sdsl-viridian);
    text-decoration: underline;
    text-underline-offset: 3px;
    transition: color 0.18s ease;
  }
  a:hover {
    color: var(--sdsl-ochre);
  }
}

@layer base {
  h1, h2, h3, h4 {
    font-family: var(--sdsl-font-serif);
    color: var(--sdsl-ink);
    line-height: 1.22;
    font-weight: 700;
    letter-spacing: -0.015em;
  }
  h1 {
    font-size: clamp(1.95rem, 3.6vw, 3.05rem);
    margin-bottom: 0.85rem;
  }
  h2 {
    font-size: clamp(1.55rem, 2.7vw, 2.25rem);
    margin-bottom: 0.85rem;
  }
  h3 {
    font-size: clamp(1.2rem, 1.9vw, 1.48rem);
    margin-bottom: 0.55rem;
  }
  p {
    margin-bottom: 1.05rem;
    color: var(--sdsl-ink-soft);
  }
  ul, ol {
    padding-left: 1.35rem;
    margin-bottom: 1.1rem;
  }
  li {
    margin-bottom: 0.45rem;
    color: var(--sdsl-ink-soft);
  }
  code, .sdsl-mono {
    font-family: var(--sdsl-font-mono);
    font-size: 0.9em;
  }
}

@layer layout {
  .sdsl-wrap {
    width: 100%;
    max-width: var(--sdsl-max-w);
    margin: 0 auto;
    padding: 0 1.25rem;
  }
  .sdsl-wrap-narrow {
    width: 100%;
    max-width: var(--sdsl-read-w);
    margin: 0 auto;
    padding: 0 1.25rem;
  }
  .sdsl-sec {
    padding: 3.8rem 0;
    border-bottom: 1px solid var(--sdsl-rule);
  }
  .sdsl-sec-surface {
    background-color: var(--sdsl-surface);
  }
  .sdsl-sec-sheet {
    background-color: var(--sdsl-sheet);
  }
  .sdsl-grid-2 {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.75rem;
    align-items: start;
  }
  .sdsl-grid-3 {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
  }
  .sdsl-grid-4 {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1.25rem;
  }
  @media (max-width: 960px) {
    .sdsl-grid-2, .sdsl-grid-3, .sdsl-grid-4 {
      grid-template-columns: 1fr;
    }
    .sdsl-sec {
      padding: 2.6rem 0;
    }
  }
}

@layer components {
  /* 1. Top Verification Bar */
  .sdsl-topbar {
    background-color: var(--sdsl-ink);
    color: var(--sdsl-bg);
    font-family: var(--sdsl-font-mono);
    font-size: 0.78rem;
    padding: 0.55rem 0;
    border-bottom: 2px solid var(--sdsl-viridian);
  }
  .sdsl-topbar-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 0.5rem 1.2rem;
    list-style: none;
    padding: 0;
    margin: 0;
  }
  .sdsl-topbar-list li {
    color: #e6e3dc;
    margin: 0;
    white-space: nowrap;
  }
  @media (max-width: 760px) {
    .sdsl-topbar-list {
      justify-content: center;
      font-size: 0.72rem;
    }
    .sdsl-topbar-list li:nth-child(n+3) {
      display: none;
    }
  }

  /* 2. Sticky Header & Navigation */
  .sdsl-header {
    position: sticky;
    top: 0;
    z-index: 90;
    background-color: rgba(251, 249, 245, 0.97);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--sdsl-rule);
  }
  .sdsl-header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 70px;
    gap: 1rem;
  }
  .sdsl-brand {
    display: inline-flex;
    align-items: center;
    gap: 0.7rem;
    text-decoration: none;
    color: var(--sdsl-ink);
  }
  .sdsl-brand-mark {
    width: 38px;
    height: 38px;
    flex-shrink: 0;
  }
  .sdsl-brand-title {
    font-family: var(--sdsl-font-serif);
    font-weight: 700;
    font-size: 1.32rem;
    line-height: 1.1;
    display: block;
    color: var(--sdsl-ink);
  }
  .sdsl-brand-sub {
    font-family: var(--sdsl-font-mono);
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--sdsl-viridian);
    display: block;
  }
  .sdsl-nav {
    display: flex;
    align-items: center;
    gap: 1.15rem;
  }
  .sdsl-nav a {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--sdsl-ink-soft);
    text-decoration: none;
    white-space: nowrap;
  }
  .sdsl-nav a:hover {
    color: var(--sdsl-viridian);
  }
  .sdsl-menu-toggle {
    display: none;
    background: var(--sdsl-sheet);
    border: 1px solid var(--sdsl-rule-strong);
    border-radius: 6px;
    padding: 0.45rem 0.7rem;
    font-family: var(--sdsl-font-mono);
    font-size: 0.8rem;
    color: var(--sdsl-ink);
    cursor: pointer;
  }
  @media (max-width: 1024px) {
    .sdsl-menu-toggle {
      display: inline-flex;
      align-items: center;
      gap: 0.35rem;
    }
    .sdsl-nav {
      display: none;
      position: absolute;
      top: 100%;
      left: 0;
      right: 0;
      background: var(--sdsl-sheet);
      border-bottom: 2px solid var(--sdsl-viridian);
      flex-direction: column;
      align-items: stretch;
      padding: 1rem 1.25rem;
      gap: 0.65rem;
      box-shadow: var(--sdsl-shadow);
    }
    .sdsl-nav.is-open {
      display: flex;
    }
    .sdsl-nav a {
      padding: 0.4rem 0;
      border-bottom: 1px solid var(--sdsl-surface);
    }
  }

  /* Buttons */
  .sdsl-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background-color: var(--sdsl-ochre);
    color: #ffffff !important;
    font-family: var(--sdsl-font-sans);
    font-weight: 700;
    font-size: 0.98rem;
    padding: 0.85rem 1.45rem;
    border-radius: 8px;
    text-decoration: none !important;
    border: 2px solid var(--sdsl-ochre);
    cursor: pointer;
    transition: background-color 0.18s ease, transform 0.15s ease;
    text-align: center;
  }
  .sdsl-btn:hover {
    background-color: var(--sdsl-ochre-hover);
    border-color: var(--sdsl-ochre-hover);
    transform: translateY(-1px);
  }
  .sdsl-btn-sm {
    padding: 0.55rem 1rem;
    font-size: 0.86rem;
  }
  .sdsl-btn-outline {
    background-color: transparent;
    color: var(--sdsl-viridian) !important;
    border: 2px solid var(--sdsl-viridian);
  }
  .sdsl-btn-outline:hover {
    background-color: var(--sdsl-viridian);
    color: #ffffff !important;
  }

  /* Hero & 6-Chip Technical Rail */
  .sdsl-hero {
    padding: 3.2rem 0 3.6rem;
    border-bottom: 3px double var(--sdsl-rule-strong);
    background: linear-gradient(180deg, #fbf9f5 0%, #f3efe6 100%);
  }
  .sdsl-hero-grid {
    display: grid;
    grid-template-columns: 1.25fr 0.95fr;
    gap: 2.4rem;
    align-items: center;
  }
  .sdsl-eyebrow {
    display: inline-block;
    font-family: var(--sdsl-font-mono);
    font-size: 0.78rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--sdsl-viridian);
    background-color: var(--sdsl-viridian-wash);
    border: 1px solid #b7decb;
    padding: 0.3rem 0.7rem;
    border-radius: 4px;
    margin-bottom: 0.9rem;
  }
  .sdsl-chip-rail {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 1rem 0 1.25rem;
    list-style: none;
    padding: 0;
  }
  .sdsl-chip-rail li {
    font-family: var(--sdsl-font-mono);
    font-size: 0.79rem;
    font-weight: 600;
    background-color: var(--sdsl-sheet);
    color: var(--sdsl-ink);
    border: 1px solid var(--sdsl-rule-strong);
    border-left: 3px solid var(--sdsl-viridian);
    padding: 0.32rem 0.68rem;
    border-radius: 5px;
    margin: 0;
  }
  .sdsl-hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.85rem;
    margin-top: 1.4rem;
  }
  .sdsl-hero-stage {
    background-color: var(--sdsl-sheet);
    border: 1px solid var(--sdsl-rule-strong);
    border-top: 4px double var(--sdsl-viridian);
    border-radius: var(--sdsl-radius-lg);
    padding: 1.5rem;
    box-shadow: var(--sdsl-shadow);
    text-align: center;
  }
  .sdsl-hero-stage img.sdsl-bottle-main {
    max-height: 410px;
    width: auto;
    margin: 0 auto 1rem;
  }
  .sdsl-badge-row {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.5rem;
    align-items: center;
    padding-top: 0.85rem;
    border-top: 1px solid var(--sdsl-rule);
  }
  .sdsl-badge-row img {
    max-height: 54px;
    width: auto;
    margin: 0 auto;
  }
  @media (max-width: 960px) {
    .sdsl-hero-grid {
      grid-template-columns: 1fr;
    }
  }
}

@layer journal {
  /* Double-rule British Medical Journal Dossier Cards */
  .sdsl-dossier-card {
    background-color: var(--sdsl-sheet);
    border: 1px solid var(--sdsl-rule);
    border-top: 4px double var(--sdsl-viridian);
    border-radius: var(--sdsl-radius);
    padding: 1.65rem;
    box-shadow: var(--sdsl-shadow);
  }
  .sdsl-card {
    background-color: var(--sdsl-sheet);
    border: 1px solid var(--sdsl-rule);
    border-radius: var(--sdsl-radius);
    padding: 1.45rem;
    height: 100%;
  }
  .sdsl-card-kicker {
    font-family: var(--sdsl-font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--sdsl-ochre);
    letter-spacing: 0.05em;
    display: block;
    margin-bottom: 0.4rem;
  }
  .sdsl-safety-box {
    background-color: var(--sdsl-warn-bg);
    border: 1px solid #f59e0b;
    border-left: 5px solid var(--sdsl-ochre);
    border-radius: var(--sdsl-radius);
    padding: 1.5rem;
    margin: 1.25rem 0;
  }
  .sdsl-aeo-box {
    background-color: var(--sdsl-viridian-wash);
    border: 1px solid #b7decb;
    border-left: 5px solid var(--sdsl-viridian);
    border-radius: var(--sdsl-radius);
    padding: 1.4rem;
    margin-bottom: 1.4rem;
  }

  /* Responsive Journal Tables */
  .sdsl-table-wrap {
    width: 100%;
    overflow-x: auto;
    background-color: var(--sdsl-sheet);
    border: 1px solid var(--sdsl-rule-strong);
    border-radius: var(--sdsl-radius);
    margin: 1.25rem 0;
  }
  .sdsl-table th, .sdsl-table td {
    padding: 0.85rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--sdsl-rule);
    font-size: 0.93rem;
    vertical-align: top;
  }
  .sdsl-table th {
    background-color: var(--sdsl-ink);
    color: #ffffff;
    font-family: var(--sdsl-font-mono);
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
  }
  .sdsl-table tr:nth-child(even) td {
    background-color: #faf7f0;
  }
  @media (max-width: 680px) {
    .sdsl-table th, .sdsl-table td {
      padding: 0.65rem 0.6rem;
      font-size: 0.83rem;
    }
  }

  /* Pricing Cards */
  .sdsl-price-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
    align-items: stretch;
    margin: 1.75rem 0;
  }
  .sdsl-pack-card {
    background-color: var(--sdsl-sheet);
    border: 2px solid var(--sdsl-rule-strong);
    border-radius: var(--sdsl-radius-lg);
    padding: 1.6rem 1.35rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    text-align: center;
    position: relative;
  }
  .sdsl-pack-card.is-featured {
    border-color: var(--sdsl-viridian);
    border-width: 3px;
    box-shadow: 0 14px 34px rgba(27, 94, 67, 0.14);
    background: linear-gradient(180deg, #ffffff 0%, #f4faf7 100%);
  }
  .sdsl-pack-ribbon {
    display: inline-block;
    align-self: center;
    font-family: var(--sdsl-font-mono);
    font-size: 0.76rem;
    font-weight: 700;
    text-transform: uppercase;
    padding: 0.3rem 0.85rem;
    border-radius: 99px;
    background-color: var(--sdsl-surface);
    color: var(--sdsl-ink);
    margin-bottom: 0.65rem;
  }
  .sdsl-pack-card.is-featured .sdsl-pack-ribbon {
    background-color: var(--sdsl-viridian);
    color: #ffffff;
  }
  .sdsl-pack-img {
    max-height: 185px;
    width: auto;
    margin: 0.6rem auto;
  }
  .sdsl-pack-price {
    font-family: var(--sdsl-font-serif);
    font-size: 2.75rem;
    font-weight: 700;
    color: var(--sdsl-ink);
    line-height: 1;
    margin: 0.4rem 0;
  }
  .sdsl-pack-price span {
    font-size: 1rem;
    font-family: var(--sdsl-font-sans);
    color: var(--sdsl-muted);
    font-weight: 500;
  }
  .sdsl-pack-math {
    font-family: var(--sdsl-font-mono);
    font-size: 0.82rem;
    color: var(--sdsl-viridian);
    background-color: var(--sdsl-viridian-wash);
    padding: 0.45rem;
    border-radius: 6px;
    margin: 0.65rem 0;
  }
  @media (max-width: 960px) {
    .sdsl-price-grid {
      grid-template-columns: 1fr;
      max-width: 480px;
      margin-left: auto;
      margin-right: auto;
    }
  }

  /* Native FAQ Accordion */
  .sdsl-faq-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
  }
  .sdsl-faq-item {
    background-color: var(--sdsl-sheet);
    border: 1px solid var(--sdsl-rule-strong);
    border-radius: var(--sdsl-radius);
    overflow: hidden;
  }
  .sdsl-faq-item summary {
    padding: 1.05rem 1.25rem;
    font-family: var(--sdsl-font-serif);
    font-size: 1.12rem;
    font-weight: 700;
    color: var(--sdsl-ink);
    cursor: pointer;
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
  }
  .sdsl-faq-item summary::-webkit-details-marker {
    display: none;
  }
  .sdsl-faq-item summary::after {
    content: "+";
    font-family: var(--sdsl-font-mono);
    font-size: 1.25rem;
    color: var(--sdsl-viridian);
    flex-shrink: 0;
  }
  .sdsl-faq-item[open] summary::after {
    content: "−";
    color: var(--sdsl-ochre);
  }
  .sdsl-faq-body {
    padding: 0 1.25rem 1.15rem;
    border-top: 1px solid var(--sdsl-surface);
    padding-top: 0.9rem;
  }

  /* Footer & Sticky Mobile Bar */
  .sdsl-footer {
    background-color: var(--sdsl-ink);
    color: #d6d3cd;
    padding: 3.5rem 0 2.5rem;
    border-top: 4px solid var(--sdsl-viridian);
    font-size: 0.9rem;
  }
  .sdsl-footer h3, .sdsl-footer h4 {
    color: #ffffff;
    font-size: 1.08rem;
    margin-bottom: 0.75rem;
  }
  .sdsl-footer p, .sdsl-footer li {
    color: #cbd5e1;
    font-size: 0.88rem;
  }
  .sdsl-footer a {
    color: #a7f3d0;
  }
  .sdsl-footer a:hover {
    color: #fdba74;
  }
  .sdsl-eeat-box {
    background-color: #1a2833;
    border: 1px solid #2e4354;
    border-left: 4px solid var(--sdsl-viridian);
    border-radius: var(--sdsl-radius);
    padding: 1.35rem;
    margin-bottom: 2.2rem;
  }
  .sdsl-sticky-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 95;
    background-color: var(--sdsl-ink);
    color: #ffffff;
    border-top: 2px solid var(--sdsl-ochre);
    padding: 0.6rem 1rem;
    box-shadow: 0 -6px 20px rgba(0, 0, 0, 0.2);
  }
  .sdsl-sticky-inner {
    max-width: var(--sdsl-max-w);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
  }
  .sdsl-sticky-meta {
    font-size: 0.86rem;
    line-height: 1.25;
  }
  .sdsl-sticky-meta strong {
    color: #fde68a;
    display: block;
    font-family: var(--sdsl-font-mono);
    font-size: 0.78rem;
  }
  @media (max-width: 600px) {
    .sdsl-sticky-meta span {
      display: none;
    }
  }
}

@layer utilities {
  .sdsl-mt-1 { margin-top: 0.75rem; }
  .sdsl-mt-2 { margin-top: 1.5rem; }
  .sdsl-mb-1 { margin-bottom: 0.75rem; }
  .sdsl-mb-2 { margin-bottom: 1.5rem; }
  .sdsl-text-center { text-align: center; }
  .sdsl-badge-pill {
    display: inline-block;
    font-family: var(--sdsl-font-mono);
    font-size: 0.75rem;
    padding: 0.2rem 0.55rem;
    border-radius: 4px;
    background: var(--sdsl-viridian-wash);
    color: var(--sdsl-viridian);
    font-weight: 600;
  }
}