:root {
  --tool-bg: #f4faf6;
  --tool-panel: #ffffff;
  --tool-ink: #163d32;
  --tool-muted: #66786f;
  --tool-line: #cfe2d8;
  --tool-accent: #18b66f;
  --tool-accent-dark: #08764d;
  --tool-soft: #e4f5ec;
  --tool-shadow: 0 22px 70px rgba(20, 80, 52, 0.12);
}

* {
  box-sizing: border-box;
}

body.channel-tool-page {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(rgba(24, 182, 111, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(24, 182, 111, 0.045) 1px, transparent 1px),
    var(--tool-bg);
  background-size: 32px 32px;
  color: var(--tool-ink);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.tool-site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 14px clamp(16px, 4vw, 42px);
  border-bottom: 1px solid var(--tool-line);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(14px);
}

.tool-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--tool-ink);
  text-decoration: none;
}

.tool-brand img {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center 18%;
}

.tool-brand strong,
.tool-brand small {
  display: block;
}

.tool-brand strong {
  font-size: 0.9rem;
  letter-spacing: 0.04em;
}

.tool-brand small {
  color: var(--tool-muted);
  font-size: 0.7rem;
  font-weight: 800;
}

.tool-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 6px;
}

.tool-nav a,
.dept-link {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  color: var(--tool-ink);
  padding: 0 10px;
  font-size: 0.82rem;
  font-weight: 800;
  text-decoration: none;
}

.tool-nav a:hover,
.tool-nav a.active,
.dept-link {
  background: var(--tool-ink);
  color: white;
}

.tools-showcase {
  padding: clamp(28px, 5vw, 56px) clamp(16px, 4vw, 42px);
}

.tools-copy {
  max-width: 980px;
}

.tools-copy h1 {
  max-width: 880px;
  margin: 10px 0 12px;
  font-size: clamp(2rem, 5vw, 4.5rem);
  line-height: 0.98;
}

.tools-copy p {
  max-width: 760px;
  color: var(--tool-muted);
  font-size: 1.05rem;
  line-height: 1.7;
}

.tools-showcase .tools-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 28px;
}

.tool-card {
  display: flex;
  min-height: 260px;
  flex-direction: column;
  gap: 16px;
  border: 1px solid var(--tool-line);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.93);
  box-shadow: 0 18px 44px rgba(20, 80, 52, 0.08);
  padding: 20px;
}

.tool-card h2 {
  margin: 0;
  color: var(--tool-accent-dark);
  font-size: 0.88rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.tool-card ul {
  display: grid;
  gap: 11px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.tool-card li {
  border-bottom: 1px solid var(--tool-line);
  padding-bottom: 9px;
  color: var(--tool-ink);
}

.tool-card li:last-child {
  border-bottom: 0;
}

.featured-tool {
  border-color: rgba(24, 182, 111, 0.45);
  background: linear-gradient(180deg, #ffffff, #eafaf1);
}

.tools-page-main {
  position: relative;
  z-index: 1;
}

.channel-tool-workspace {
  padding: clamp(34px, 6vw, 72px) 0;
  border-top: 1px solid var(--tool-line);
  background: rgba(255, 255, 255, 0.38);
}

.channel-tool-workspace .window-grid {
  margin-top: 28px;
}

.channel-tool-workspace .channel-design-app {
  border-radius: 8px;
}

.hub-shell {
  min-height: 80vh;
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  border-top: 1px solid var(--tool-line);
}

.hub-sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 22px;
  background: rgba(255, 255, 255, 0.82);
  border-right: 1px solid var(--tool-line);
  backdrop-filter: blur(12px);
  overflow-y: auto;
}

.hub-brand,
.hub-topbar,
.assistant-header,
.section-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.hub-brand button,
.hub-topbar button,
.category-button,
.landing-category,
.landing-actions button,
.section-heading button,
.calculate-button,
.print-button,
.assistant-toggle,
.assistant-header button,
.chat-form button,
.clear-chat,
.library-row.tool-row {
  border: 0;
  cursor: pointer;
  font: inherit;
}

.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: var(--tool-accent);
  color: white;
  font-weight: 800;
}

.hub-brand strong,
.hub-topbar strong {
  display: block;
  font-size: 1rem;
}

.hub-brand span,
.hub-topbar span,
.category-copy span,
.solver-note,
.solver-status,
.landing-copy p,
.hub-highlights span,
.library-page p,
.message small {
  color: var(--tool-muted);
}

.back-link {
  display: inline-flex;
  margin-top: 18px;
  color: var(--tool-accent-dark);
  font-weight: 700;
  text-decoration: none;
}

.library-search {
  margin: 24px 0 14px;
}

.library-search label {
  display: block;
  color: var(--tool-muted);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.library-search input,
.manning-body input,
.manning-body select,
.chat-form input,
.contact-form input,
.contact-form textarea {
  width: 100%;
  min-height: 42px;
  margin-top: 8px;
  border: 1px solid var(--tool-line);
  border-radius: 8px;
  background: white;
  color: var(--tool-ink);
  padding: 10px 12px;
  font: inherit;
}

.category-list {
  display: grid;
  gap: 10px;
}

.category-button,
.landing-category {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 12px;
  border: 1px solid var(--tool-line);
  border-left: 4px solid var(--tab-color, var(--tool-accent));
  border-radius: 8px;
  background: white;
  color: var(--tool-ink);
  text-align: left;
}

.category-button.active {
  background: var(--tool-soft);
  box-shadow: inset 0 0 0 1px rgba(24, 182, 111, 0.18);
}

.category-icon {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  border-radius: 8px;
  background: #e8f5ef;
  color: var(--tab-color, var(--tool-accent-dark));
  font-weight: 800;
  font-size: 0.78rem;
}

.category-copy strong {
  display: block;
}

.category-copy span {
  display: block;
  margin-top: 2px;
  font-size: 0.8rem;
}

.hub-main {
  min-width: 0;
  padding: 22px clamp(16px, 3vw, 40px) 40px;
}

.hub-topbar {
  margin-bottom: 22px;
}

.hub-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.hub-tabs button,
.landing-actions button,
.section-heading button,
.calculate-button,
.print-button,
.chat-form button,
.clear-chat {
  border-radius: 8px;
  background: var(--tool-ink);
  color: white;
  padding: 11px 14px;
  font-weight: 800;
}

.hub-tabs button.active,
.calculate-button,
.landing-actions button:first-child {
  background: var(--tool-accent);
}

.window-grid {
  display: grid;
  gap: 18px;
}

.channel-design-app,
.landing-page,
.library-page,
.contact-page {
  background: rgba(255, 255, 255, 0.93);
  border: 1px solid var(--tool-line);
  border-radius: 12px;
  box-shadow: var(--tool-shadow);
  padding: clamp(16px, 3vw, 30px);
}

.manning-body {
  display: grid;
  gap: 20px;
}

.project-field {
  display: block;
  font-weight: 800;
}

.solver-controls,
.manning-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.manning-grid {
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
}

.manning-body h3 {
  margin: 0;
  font-size: clamp(1.3rem, 3vw, 2rem);
}

.manning-body fieldset {
  margin: 0;
  min-width: 0;
  display: grid;
  gap: 12px;
  border: 1px solid var(--tool-line);
  border-radius: 10px;
  padding: 16px;
}

.manning-body legend {
  padding: 0 8px;
  font-weight: 900;
}

.manning-body fieldset label {
  display: grid;
  grid-template-columns: minmax(110px, 1fr) minmax(0, 1.4fr) 54px;
  align-items: center;
  gap: 8px;
}

.manning-body fieldset em {
  color: var(--tool-muted);
  font-style: normal;
  font-size: 0.85rem;
}

.manning-body output {
  min-height: 42px;
  display: flex;
  align-items: center;
  border-radius: 8px;
  background: var(--tool-soft);
  padding: 10px 12px;
  font-weight: 800;
}

.solver-target {
  background: #e8fff3 !important;
  border-color: var(--tool-accent) !important;
}

.solver-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.print-button {
  background: var(--tool-accent-dark);
}

.landing-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 20px;
  align-items: center;
}

.landing-copy h2 {
  margin: 10px 0;
  font-size: clamp(2.2rem, 6vw, 4rem);
}

.eyebrow {
  color: var(--tool-accent-dark);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.landing-actions,
.hub-highlights,
.landing-category-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.landing-actions {
  grid-template-columns: repeat(2, max-content);
  margin-top: 20px;
}

.hub-highlights,
.landing-section,
.advice-strip {
  margin-top: 18px;
}

.hub-highlights div,
.advice-strip {
  border: 1px solid var(--tool-line);
  border-radius: 10px;
  background: var(--tool-soft);
  padding: 14px;
}

.canal-graphic {
  min-height: 210px;
  border-radius: 12px;
  background:
    linear-gradient(145deg, transparent 44%, #cbe8dc 45% 55%, transparent 56%),
    linear-gradient(#a4d7ff 0 38%, #dff3e9 39% 100%);
  border: 1px solid var(--tool-line);
}

.library-list {
  display: grid;
  gap: 10px;
}

.library-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  border: 1px solid var(--tool-line);
  border-radius: 8px;
  background: white;
  color: var(--tool-ink);
  padding: 12px 14px;
  text-decoration: none;
  text-align: left;
}

.library-row strong {
  color: var(--tool-accent-dark);
}

.assistant-widget {
  position: fixed;
  right: 20px;
  bottom: 20px;
  width: min(380px, calc(100vw - 32px));
  border: 1px solid var(--tool-line);
  border-radius: 12px;
  background: white;
  box-shadow: var(--tool-shadow);
  overflow: hidden;
  z-index: 20;
}

.assistant-widget.collapsed .assistant-body {
  display: none;
}

.assistant-toggle {
  position: fixed;
  right: 20px;
  bottom: 20px;
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: var(--tool-accent);
  color: white;
  z-index: 21;
}

.assistant-widget:not(.collapsed) + .assistant-toggle {
  display: none;
}

.assistant-header {
  padding: 12px 14px;
  background: var(--tool-ink);
  color: white;
}

.assistant-header button {
  background: transparent;
  color: white;
  font-size: 1.2rem;
}

.assistant-body {
  display: grid;
  gap: 10px;
  padding: 12px;
}

.chat-messages {
  max-height: 250px;
  display: grid;
  gap: 8px;
  overflow-y: auto;
}

.message {
  border-radius: 10px;
  padding: 10px;
  background: var(--tool-soft);
}

.message.user {
  background: #e8efff;
}

.message small {
  display: block;
  margin-top: 6px;
}

.prompt-chips {
  display: flex;
  gap: 8px;
  overflow-x: auto;
}

.prompt-chip {
  flex: 0 0 auto;
  border: 1px solid var(--tool-line);
  border-radius: 999px;
  background: white;
  color: var(--tool-ink);
  padding: 7px 10px;
}

.chat-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
}

.print-report {
  display: none;
}

@media (max-width: 900px) {
  .tool-site-header {
    position: relative;
    align-items: flex-start;
    flex-direction: column;
  }

  .tool-nav {
    justify-content: flex-start;
  }

  .tools-showcase .tools-grid {
    grid-template-columns: 1fr;
  }

  .hub-shell,
  .landing-intro,
  .manning-grid,
  .solver-controls,
  .landing-actions,
  .hub-highlights,
  .landing-category-grid {
    grid-template-columns: 1fr;
  }

  .hub-sidebar {
    position: relative;
    height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--tool-line);
  }

  .hub-main {
    padding-bottom: 90px;
  }

  .hub-topbar {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 560px) {
  .hub-sidebar,
  .hub-main {
    padding: 16px;
  }

  .manning-body fieldset label {
    grid-template-columns: 1fr;
  }
}

@media print {
  body * {
    visibility: hidden;
  }

  #printReport,
  #printReport * {
    visibility: visible;
  }

  #printReport {
    display: block;
    position: absolute;
    inset: 0;
    padding: 24px;
    color: #111;
    background: white;
  }

  #printReport table {
    width: 100%;
    border-collapse: collapse;
    margin: 12px 0 20px;
  }

  #printReport th,
  #printReport td {
    border: 1px solid #999;
    padding: 8px;
    text-align: left;
  }
}