/* =========================================================
   PROTOTIM — Product Documentation Shell Stylesheet
   IMAGE-FREE design: pure geometry, system borders, typography
   ========================================================= */

:root {
  --bg-main: #ffffff;
  --bg-sidebar: #f8fafc;
  --bg-subtle: #f1f5f9;
  --bg-callout: #f8fafc;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --border-light: #e2e8f0;
  --border-strong: #cbd5e1;
  --accent-color: #0284c7;
  --accent-hover: #0369a1;
  --accent-subtle: #e0f2fe;
  --code-bg: #f1f5f9;
  --code-text: #0f172a;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'IBM Plex Mono', SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --sidebar-w: 270px;
  --topbar-h: 53px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 15px;
  background-color: var(--bg-main);
  color: var(--text-primary);
}

body {
  font-family: var(--font-sans);
  line-height: 1.6;
  background-color: var(--bg-main);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
}

/* Topbar */
.docs-topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--topbar-h);
  background-color: #ffffff;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
}

.topbar-inner {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.topbar-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--text-primary);
}

.brand-badge {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.05em;
  background: var(--text-primary);
  color: #ffffff;
  padding: 0.2rem 0.55rem;
  border-radius: 3px;
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.docs-pill {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  background: var(--accent-subtle);
  color: var(--accent-color);
  padding: 0.15rem 0.45rem;
  border-radius: 12px;
  border: 1px solid rgba(2, 132, 199, 0.2);
  font-weight: 500;
}

.topbar-meta {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.status-indicator {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.status-dot {
  width: 7px;
  height: 7px;
  background-color: #10b981;
  border-radius: 50%;
  display: inline-block;
}

.topbar-phone {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-color);
  text-decoration: none;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.6rem;
  border-radius: 4px;
  border: 1px solid var(--border-light);
  background: #ffffff;
  transition: all 0.15s ease;
}

.topbar-phone:hover {
  border-color: var(--accent-color);
  background: var(--accent-subtle);
}

/* Mobile Nav Strip */
.mobile-nav-strip {
  display: none;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 1rem;
  background: var(--bg-sidebar);
  border-bottom: 1px solid var(--border-light);
}

.mobile-menu-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: #ffffff;
  border: 1px solid var(--border-strong);
  padding: 0.35rem 0.75rem;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-primary);
  cursor: pointer;
}

.mobile-location {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Layout Shell */
.docs-container {
  display: flex;
  max-width: 1400px;
  margin: 0 auto;
  min-height: calc(100vh - var(--topbar-h));
}

.docs-container.single-col {
  display: block;
}

/* Sidebar TOC */
.docs-sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-light);
  position: sticky;
  top: var(--topbar-h);
  height: calc(100vh - var(--topbar-h));
  overflow-y: auto;
}

.sidebar-scroller {
  padding: 1.5rem 1rem 2rem 1.25rem;
}

.toc-section-title {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 0.6rem;
  padding-left: 0.5rem;
}

.toc-section-title.mt-lg {
  margin-top: 1.75rem;
}

.toc-nav {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.toc-link {
  display: block;
  font-size: 0.88rem;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 0.4rem 0.6rem;
  border-radius: 4px;
  border-left: 2px solid transparent;
  transition: all 0.12s ease;
}

.toc-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-right: 0.35rem;
}

.toc-link:hover {
  color: var(--text-primary);
  background-color: #ffffff;
  border-left-color: var(--border-strong);
}

.toc-link.active {
  color: var(--accent-color);
  font-weight: 600;
  background-color: #ffffff;
  border-left-color: var(--accent-color);
}

.sidebar-quickinfo {
  margin-top: 2rem;
  padding: 1rem 0.75rem;
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: 4px;
}

.info-title {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

.info-text {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.45;
}

.info-text + .info-text {
  margin-top: 0.5rem;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Main Content */
.docs-content {
  flex: 1;
  min-width: 0;
  padding: 2.5rem 3rem 4rem 3rem;
}

.docs-content.full-width {
  max-width: 900px;
  margin: 0 auto;
  padding: 3rem 2rem;
}

.content-body {
  max-width: 860px;
}

/* Typography & Docs Sections */
.docs-section {
  margin-bottom: 4rem;
  scroll-margin-top: calc(var(--topbar-h) + 1.5rem);
}

.section-breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  color: var(--accent-color);
  margin-bottom: 0.5rem;
}

.section-h1 {
  font-size: 2.1rem;
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.lead-text {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 1.75rem;
}

.section-h2 {
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  margin-top: 0.5rem;
  margin-bottom: 0.5rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--border-light);
}

.section-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

/* Callout box */
.callout-box {
  background: var(--bg-callout);
  border: 1px solid var(--border-strong);
  border-left: 4px solid var(--accent-color);
  border-radius: 4px;
  padding: 1.25rem 1.5rem;
  margin-top: 1.5rem;
}

.callout-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--accent-color);
  margin-bottom: 1rem;
}

.callout-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1.2rem;
}

.callout-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.item-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
}

.item-value {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* Definition blocks for services */
.def-blocks {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.def-item {
  border: 1px solid var(--border-light);
  border-radius: 5px;
  background: #ffffff;
  padding: 1.25rem 1.4rem;
  transition: border-color 0.15s ease;
}

.def-item:hover {
  border-color: var(--border-strong);
}

.def-term {
  margin-bottom: 0.6rem;
}

.term-code {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent-color);
  margin-bottom: 0.2rem;
}

.term-title {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
}

.def-desc p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: 0.85rem;
}

.tech-specs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.spec-tag {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  background: var(--bg-subtle);
  color: var(--text-secondary);
  padding: 0.25rem 0.55rem;
  border-radius: 3px;
  border: 1px solid var(--border-light);
}

/* Process steps (ordered list) */
.process-steps {
  list-style: none;
  counter-reset: proc-counter;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.step-node {
  border: 1px solid var(--border-light);
  border-left: 3px solid var(--text-primary);
  padding: 1.15rem 1.35rem;
  background: #ffffff;
  border-radius: 0 4px 4px 0;
}

.step-header {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 0.45rem;
}

.step-index {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--accent-color);
}

.step-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
}

.step-body {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

.inline-code {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  background: var(--code-bg);
  color: var(--code-text);
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
  border: 1px solid var(--border-light);
}

/* Pricing & Notes Card */
.pricing-formula-card {
  background: var(--bg-sidebar);
  border: 1px solid var(--border-light);
  border-radius: 4px;
  padding: 1.25rem;
  margin-bottom: 1.75rem;
}

.formula-header {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.formula-body code {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  background: #ffffff;
  border: 1px solid var(--border-light);
  padding: 0.75rem 1rem;
  border-radius: 4px;
  color: var(--text-primary);
  overflow-x: auto;
}

.formula-note {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.6rem;
}

/* FAQ Accordion / Notes */
.faq-accordion {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.faq-item {
  border: 1px solid var(--border-light);
  border-radius: 4px;
  padding: 1rem 1.25rem;
  background: #ffffff;
}

.faq-question {
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
}

.faq-answer {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* Contact Section Grid */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 1.75rem;
  align-items: start;
}

.contact-details-box {
  background: var(--bg-sidebar);
  border: 1px solid var(--border-light);
  border-radius: 5px;
  padding: 1.4rem;
}

.box-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-light);
}

.details-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.detail-key {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--text-muted);
  margin-bottom: 0.2rem;
}

.detail-val {
  font-size: 0.9rem;
  color: var(--text-primary);
  line-height: 1.45;
}

.accent-link {
  color: var(--accent-color);
  text-decoration: none;
  font-weight: 500;
}

.accent-link:hover {
  text-decoration: underline;
}

.social-block {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-light);
}

.social-links-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.4rem;
}

.social-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  background: #ffffff;
  border: 1px solid var(--border-light);
  padding: 0.35rem 0.65rem;
  border-radius: 3px;
  text-decoration: none;
  transition: all 0.15s ease;
}

.social-btn:hover {
  color: var(--accent-color);
  border-color: var(--accent-color);
}

/* Form Box */
.contact-form-box {
  background: #ffffff;
  border: 1px solid var(--border-strong);
  border-radius: 5px;
  padding: 1.5rem;
}

.docs-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.form-row {
  display: flex;
  gap: 1rem;
}

.col-half {
  flex: 1;
}

.form-label {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.form-input,
.form-select,
.form-textarea {
  font-family: var(--font-sans);
  font-size: 0.88rem;
  color: var(--text-primary);
  background: #ffffff;
  border: 1px solid var(--border-strong);
  border-radius: 4px;
  padding: 0.55rem 0.75rem;
  transition: border-color 0.15s ease;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 2px var(--accent-subtle);
}

.form-checkbox-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-top: 0.2rem;
}

.form-checkbox-group input[type="checkbox"] {
  accent-color: var(--accent-color);
  width: 15px;
  height: 15px;
}

.submit-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: var(--text-primary);
  color: #ffffff;
  border: none;
  border-radius: 4px;
  padding: 0.65rem 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease;
  width: 100%;
}

.submit-btn:hover {
  background: #1e293b;
}

.form-status-msg {
  margin-top: 0.75rem;
  padding: 0.65rem 0.85rem;
  border-radius: 4px;
  font-size: 0.82rem;
  font-family: var(--font-mono);
  line-height: 1.4;
}

.form-status-msg.success {
  background: #ecfdf5;
  color: #065f46;
  border: 1px solid #a7f3d0;
}

.form-status-msg.error {
  background: #fef2f2;
  color: #991b1b;
  border: 1px solid #fecaca;
}

/* Footer */
.docs-footer {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-light);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 2rem;
  padding-bottom: 2rem;
}

.footer-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--text-primary);
}

.footer-copy {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-top: 0.4rem;
  max-width: 440px;
}

.footer-addr {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
}

.footer-nav {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  text-align: right;
}

.footer-nav a {
  font-size: 0.82rem;
  color: var(--text-secondary);
  text-decoration: none;
}

.footer-nav a:hover {
  color: var(--accent-color);
}

.footer-bottom {
  padding-top: 1.25rem;
  border-top: 1px dashed var(--border-light);
  font-size: 0.76rem;
  color: var(--text-muted);
}

/* Legal Page Specifics */
.legal-article {
  max-width: 760px;
}

.legal-block {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-light);
}

.legal-list {
  margin-top: 0.75rem;
  padding-left: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

/* Responsive Breakpoints */
@media (max-width: 960px) {
  .docs-sidebar {
    display: none;
    position: fixed;
    top: var(--topbar-h);
    left: 0;
    width: 100%;
    height: calc(100vh - var(--topbar-h));
    z-index: 90;
    background: #ffffff;
  }

  .docs-sidebar.is-open {
    display: block;
  }

  .mobile-nav-strip {
    display: flex;
    position: sticky;
    top: var(--topbar-h);
    z-index: 80;
  }

  .docs-content {
    padding: 1.75rem 1.25rem 3rem 1.25rem;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    flex-direction: column;
    gap: 1.5rem;
  }

  .footer-nav {
    text-align: left;
  }

  .form-row {
    flex-direction: column;
    gap: 1rem;
  }
}

@media (max-width: 600px) {
  .status-indicator {
    display: none;
  }

  .section-h1 {
    font-size: 1.65rem;
  }

  .topbar-phone {
    font-size: 0.78rem;
  }
}