/* BuildFlow Portal — Main Stylesheet */
/* Brand: Primary Blue #1E3A5F | Accent Green #2E7D5A | Neutral Light #F5F7FA | Neutral Dark #1A1A2E */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;700&display=swap');

:root {
  --color-primary: #1E3A5F;
  --color-primary-light: #2A5080;
  --color-accent: #2E7D5A;
  --color-accent-light: #3A9E70;
  --color-bg: #F5F7FA;
  --color-dark: #1A1A2E;
  --color-white: #FFFFFF;
  --color-amber: #C67B00;
  --color-error: #B91C1C;
  --color-border: #D1D9E6;
  --color-text-secondary: #5A6A7E;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow: 0 2px 8px rgba(30, 58, 95, 0.08);
  --shadow-md: 0 4px 16px rgba(30, 58, 95, 0.12);
  --transition: 0.2s ease;
  --max-width: 1200px;
}

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

html { font-size: 16px; scroll-behavior: smooth; }

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

/* ── Layout ── */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.page-wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main { flex: 1; }

/* ── Navigation ── */
.nav {
  background: var(--color-primary);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 12px rgba(0,0,0,0.15);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  height: 60px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.nav-logo {
  width: 32px;
  height: 32px;
  background: var(--color-white);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-logo svg { width: 20px; height: 20px; }

.nav-brand-name {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: -0.01em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.nav-links a {
  color: rgba(255,255,255,0.85);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: var(--radius);
  transition: var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  background: rgba(255,255,255,0.12);
  color: var(--color-white);
}

.nav-cta {
  background: var(--color-accent) !important;
  color: var(--color-white) !important;
  padding: 6px 16px !important;
}

.nav-cta:hover {
  background: var(--color-accent-light) !important;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-white);
  border-radius: 2px;
  transition: var(--transition);
}

/* ── Hero ── */
.hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: var(--color-white);
  padding: 80px 24px 72px;
  text-align: center;
}

.hero-badge {
  display: inline-block;
  background: rgba(46, 125, 90, 0.25);
  border: 1px solid rgba(46, 125, 90, 0.5);
  color: #7DCCA9;
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 4px 14px;
  border-radius: 100px;
  margin-bottom: 24px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.hero-sub {
  font-size: 1.125rem;
  color: rgba(255,255,255,0.8);
  max-width: 560px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 500;
  padding: 10px 22px;
  border-radius: var(--radius);
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  line-height: 1.4;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-white);
}

.btn-primary:hover { background: var(--color-accent-light); }

.btn-outline {
  background: transparent;
  border: 1.5px solid rgba(255,255,255,0.5);
  color: var(--color-white);
}

.btn-outline:hover {
  border-color: var(--color-white);
  background: rgba(255,255,255,0.08);
}

.btn-secondary {
  background: var(--color-primary);
  color: var(--color-white);
}

.btn-secondary:hover { background: var(--color-primary-light); }

.btn-ghost {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-border);
}

.btn-ghost:hover { border-color: var(--color-primary); }

.btn-sm {
  font-size: 0.8125rem;
  padding: 6px 14px;
}

/* ── Cards ── */
.card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 28px;
  transition: var(--transition);
}

.card:hover { box-shadow: var(--shadow-md); }

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.card-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: rgba(30, 58, 95, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  color: var(--color-primary);
}

.card-icon.green { background: rgba(46, 125, 90, 0.1); color: var(--color-accent); }

.card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-dark);
}

.card p {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ── Sections ── */
.section {
  padding: 64px 0;
}

.section-alt { background: var(--color-white); }

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.section-header h2 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 700;
  color: var(--color-dark);
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.section-header p {
  font-size: 1rem;
  color: var(--color-text-secondary);
  max-width: 520px;
  margin: 0 auto;
}

/* ── Metrics ── */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
  margin-top: 48px;
}

.metric-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: center;
  box-shadow: var(--shadow);
  border-top: 3px solid var(--color-primary);
}

.metric-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 6px;
}

.metric-label {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  font-weight: 500;
}

.metric-note {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  margin-top: 4px;
}

/* ── Trust Badges ── */
.trust-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.trust-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(46, 125, 90, 0.08);
  border: 1px solid rgba(46, 125, 90, 0.25);
  color: var(--color-accent);
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 5px 12px;
  border-radius: 100px;
}

.trust-badge svg { width: 14px; height: 14px; flex-shrink: 0; }

/* ── Page Header ── */
.page-header {
  background: var(--color-primary);
  color: var(--color-white);
  padding: 56px 24px 48px;
}

.page-header h1 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 10px;
}

.page-header p {
  font-size: 1rem;
  color: rgba(255,255,255,0.8);
  max-width: 520px;
}

/* ── Tables ── */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

th {
  background: var(--color-bg);
  color: var(--color-dark);
  font-weight: 700;
  text-align: left;
  padding: 10px 14px;
  border-bottom: 2px solid var(--color-border);
}

td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-dark);
}

tr:last-child td { border-bottom: none; }

.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* ── Alert / Notice ── */
.alert {
  border-radius: var(--radius);
  padding: 14px 18px;
  margin-bottom: 20px;
  font-size: 0.875rem;
  display: flex;
  gap: 10px;
}

.alert-warning {
  background: #FFF8E7;
  border: 1px solid #F0C040;
  color: #7B4F00;
}

.alert-info {
  background: #EBF4FF;
  border: 1px solid #90BEF0;
  color: #1A3A6B;
}

/* ── Footer ── */
.footer {
  background: var(--color-dark);
  color: rgba(255,255,255,0.7);
  padding: 48px 24px 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  max-width: var(--max-width);
  margin: 0 auto 40px;
}

.footer-brand { margin-bottom: 16px; }

.footer-logo-text {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 10px;
}

.footer-tagline {
  font-size: 0.8125rem;
  line-height: 1.6;
  margin-bottom: 16px;
}

.footer-badges {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-badge-item {
  font-size: 0.75rem;
  display: flex;
  align-items: center;
  gap: 6px;
  color: rgba(255,255,255,0.6);
}

.footer-col h4 {
  color: var(--color-white);
  font-size: 0.875rem;
  font-weight: 700;
  margin-bottom: 14px;
}

.footer-col ul { list-style: none; }

.footer-col li { margin-bottom: 8px; }

.footer-col a {
  color: rgba(255,255,255,0.65);
  text-decoration: none;
  font-size: 0.875rem;
  transition: var(--transition);
}

.footer-col a:hover { color: var(--color-white); }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 24px;
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.8125rem;
}

.footer-bottom a {
  color: rgba(255,255,255,0.5);
  text-decoration: none;
}

.footer-bottom a:hover { color: rgba(255,255,255,0.8); }

/* ── Breadcrumb ── */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  padding: 12px 0;
  margin-bottom: 8px;
}

.breadcrumb a {
  color: var(--color-primary);
  text-decoration: none;
}

.breadcrumb a:hover { text-decoration: underline; }

.breadcrumb-sep { color: var(--color-border); }

/* ── Pricing ── */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.pricing-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 32px;
  position: relative;
  transition: var(--transition);
}

.pricing-card.featured {
  border: 2px solid var(--color-primary);
  box-shadow: var(--shadow-md);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-primary);
  color: var(--color-white);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 14px;
  border-radius: 100px;
  white-space: nowrap;
}

.pricing-tier {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  margin-bottom: 8px;
}

.pricing-price {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--color-dark);
  letter-spacing: -0.02em;
  line-height: 1;
  margin-bottom: 4px;
}

.pricing-price span {
  font-size: 1rem;
  font-weight: 400;
  color: var(--color-text-secondary);
}

.pricing-desc {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: 24px;
  margin-top: 8px;
}

.pricing-features {
  list-style: none;
  margin-bottom: 28px;
}

.pricing-features li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--color-dark);
  padding: 5px 0;
}

.pricing-features li::before {
  content: '';
  display: block;
  width: 16px;
  height: 16px;
  background: var(--color-accent);
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 2px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E");
  background-size: 10px;
  background-position: center;
  background-repeat: no-repeat;
}

/* ── Blog ── */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.blog-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: var(--transition);
  text-decoration: none;
  color: inherit;
  display: block;
}

.blog-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }

.blog-card-img {
  height: 160px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.blog-card-body { padding: 20px; }

.blog-tag {
  display: inline-block;
  background: rgba(30, 58, 95, 0.08);
  color: var(--color-primary);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 100px;
  margin-bottom: 10px;
  letter-spacing: 0.04em;
}

.blog-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.4;
}

.blog-card p {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 12px;
}

.blog-meta {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}

/* ── Docs viewer ── */
.docs-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 32px;
  align-items: start;
}

.docs-sidebar {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 20px;
  position: sticky;
  top: 80px;
}

.docs-sidebar h3 {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  margin-bottom: 12px;
}

.docs-nav { list-style: none; }

.docs-nav li { margin-bottom: 2px; }

.docs-nav a {
  display: block;
  padding: 7px 12px;
  border-radius: var(--radius);
  text-decoration: none;
  font-size: 0.875rem;
  color: var(--color-dark);
  transition: var(--transition);
}

.docs-nav a:hover { background: var(--color-bg); }
.docs-nav a.active { background: rgba(30,58,95,0.08); color: var(--color-primary); font-weight: 500; }

.docs-content {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 32px;
}

/* ── PRD viewer ── */
.prd-section {
  margin-bottom: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--color-border);
}

.prd-section:last-child { border-bottom: none; }

.prd-section h2 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.prd-section h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-top: 16px;
  margin-bottom: 8px;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.tag {
  display: inline-block;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  color: var(--color-dark);
  font-size: 0.75rem;
  font-weight: 500;
  padding: 3px 10px;
  border-radius: 100px;
}

.tag.blue { background: rgba(30,58,95,0.08); border-color: rgba(30,58,95,0.2); color: var(--color-primary); }
.tag.green { background: rgba(46,125,90,0.08); border-color: rgba(46,125,90,0.2); color: var(--color-accent); }

/* ── Presentation viewer ── */
.slide {
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 56px 64px;
  min-height: 400px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.slide::before {
  content: '';
  position: absolute;
  top: -50px;
  right: -50px;
  width: 300px;
  height: 300px;
  background: rgba(255,255,255,0.04);
  border-radius: 50%;
  pointer-events: none;
}

.slide-number {
  position: absolute;
  bottom: 20px;
  right: 24px;
  font-size: 0.75rem;
  color: rgba(255,255,255,0.4);
  font-weight: 500;
}

.slide-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
  margin-bottom: 16px;
}

.slide h1 {
  font-size: clamp(1.75rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 16px;
}

.slide h2 {
  font-size: clamp(1.25rem, 3vw, 1.875rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 20px;
}

.slide-sub {
  font-size: 1.0625rem;
  color: rgba(255,255,255,0.75);
  line-height: 1.65;
  max-width: 640px;
}

.slide-green { background: linear-gradient(135deg, var(--color-accent), #1E5C40); }
.slide-light {
  background: var(--color-white);
  color: var(--color-dark);
}

.slide-light .slide-label { color: var(--color-text-secondary); }
.slide-light h2 { color: var(--color-dark); }
.slide-light .slide-number { color: var(--color-border); }
.slide-light .slide-sub { color: var(--color-text-secondary); }

.slide-two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.stat-box {
  background: rgba(255,255,255,0.1);
  border-radius: var(--radius);
  padding: 20px 24px;
  text-align: center;
}

.stat-val {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.65);
}

.stat-box.light {
  background: var(--color-bg);
}

.stat-box.light .stat-val { color: var(--color-primary); }
.stat-box.light .stat-label { color: var(--color-text-secondary); }

.bullet-list {
  list-style: none;
  margin-top: 12px;
}

.bullet-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 6px 0;
  font-size: 0.9375rem;
  line-height: 1.5;
}

.bullet-list li::before {
  content: '';
  display: block;
  width: 8px;
  height: 8px;
  background: var(--color-accent);
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 7px;
}

.slide-light .bullet-list li::before { background: var(--color-primary); }

/* ── Viewer controls ── */
.viewer-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  margin-top: 16px;
}

.slide-counter {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  font-weight: 500;
}

/* ── Contact form ── */
.contact-form { max-width: 540px; }

.form-group { margin-bottom: 20px; }

label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-dark);
  margin-bottom: 6px;
}

input, textarea, select {
  width: 100%;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  color: var(--color-dark);
  background: var(--color-white);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius);
  padding: 10px 14px;
  transition: var(--transition);
  outline: none;
}

input:focus, textarea:focus, select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(30,58,95,0.1);
}

textarea { resize: vertical; min-height: 120px; }

/* ── Responsive ── */
@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .docs-layout { grid-template-columns: 1fr; }
  .docs-sidebar { position: static; }
  .slide-two-col { grid-template-columns: 1fr; gap: 24px; }
  .slide { padding: 36px 28px; }
}

@media (max-width: 640px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--color-primary);
    padding: 16px;
    box-shadow: var(--shadow-md);
  }
  .hero { padding: 56px 20px 48px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .metrics-grid { grid-template-columns: 1fr 1fr; }
  .section { padding: 40px 0; }
}

/* ── Utilities ── */
.text-center { text-align: center; }
.text-secondary { color: var(--color-text-secondary); }
.font-bold { font-weight: 700; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.mt-8 { margin-top: 32px; }
.mb-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }
.gap-row { display: flex; flex-direction: column; gap: 16px; }
.divider { border: none; border-top: 1px solid var(--color-border); margin: 32px 0; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }