/* ============================================================
   OpenSpek v3 -- Sentinel Aesthetic
   Design system: docs/OPENSPEK-DESIGN-SPEC-V3.md
   ============================================================ */

/* RESET & BASE */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --surface:                  #131314;
  --surface-low:              #1A1B1F;
  --surface-container:        #1E2028;
  --surface-high:             #242630;
  --surface-highest:          #2A2C38;
  --outline-variant:          #434656;

  --primary:           #bbc3ff;
  --primary-container: #3c59fd;
  --secondary:         #cdbdff;
  --tertiary:          #00e475;

  --text-main:     #e5e2e3;
  --text-muted:    #94A3B8;
  --text-on-primary: #0d0f1a;

  --gradient-primary: linear-gradient(135deg, #bbc3ff 0%, #3c59fd 100%);
  --gradient-hero: radial-gradient(ellipse 80% 60% at 50% -10%, rgba(60,89,253,0.18) 0%, transparent 70%);

  --glass-bg:     rgba(19, 19, 20, 0.85);
  --glass-border: rgba(187, 195, 255, 0.08);
  --blur:         12px;

  --radius-sm: 0.375rem;
  --radius:    0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;

  --shadow-float: 0 24px 48px rgba(0, 0, 0, 0.4);
  --shadow-card:  0 4px 24px rgba(0, 0, 0, 0.25);
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--surface);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ============================================================
   TYPOGRAPHY
   ============================================================ */

h1, h2, h3, h4 {
  font-family: 'Space Grotesk', sans-serif;
  color: var(--text-main);
  line-height: 1.15;
}

p { color: var(--text-muted); line-height: 1.7; }

a { color: inherit; text-decoration: none; }

/* ============================================================
   LAYOUT
   ============================================================ */

.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

.container-narrow {
  max-width: 720px;
}

.section {
  padding: 96px 0;
}

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

.section-label {
  font-family: 'Inter', sans-serif;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 16px;
}

.section-label-light {
  color: rgba(187, 195, 255, 0.7);
}

.section-heading {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-main);
  margin-bottom: 16px;
  line-height: 1.15;
}

.section-sub {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 620px;
  margin-bottom: 56px;
  line-height: 1.65;
}

.section-closer {
  text-align: center;
  font-size: 1rem;
  color: var(--text-muted);
  margin-top: 48px;
  font-style: italic;
}

/* ============================================================
   BUTTONS
   ============================================================ */

.btn {
  display: inline-block;
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius);
  cursor: pointer;
  border: none;
  transition: opacity 0.15s ease, transform 0.1s ease;
  white-space: nowrap;
}

.btn:hover { opacity: 0.88; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--gradient-primary);
  color: var(--text-on-primary);
}

.btn-secondary {
  background: transparent;
  border: 1px solid rgba(187, 195, 255, 0.25);
  color: var(--primary);
}

.btn-secondary:hover {
  border-color: rgba(187, 195, 255, 0.45);
  background: rgba(187, 195, 255, 0.04);
}

.btn-sm {
  padding: 0.5rem 1.25rem;
  font-size: 0.82rem;
}

.btn-lg {
  padding: 1rem 2.5rem;
  font-size: 1rem;
}

.btn-block {
  display: block;
  text-align: center;
  width: 100%;
  margin-top: auto;
}

/* ============================================================
   STATUS DOT
   ============================================================ */

.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--tertiary);
  border-radius: 50%;
  animation: pulse 2.4s ease-in-out infinite;
}

.status-dot-sm {
  width: 6px;
  height: 6px;
}

@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(0, 228, 117, 0.4); }
  50% { opacity: 0.85; box-shadow: 0 0 0 5px rgba(0, 228, 117, 0); }
}

/* ============================================================
   NAV
   ============================================================ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--glass-bg);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  border-bottom: 1px solid var(--glass-border);
}

.nav-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-wordmark {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-main);
  letter-spacing: -0.01em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color 0.15s ease;
}

.nav-links a:hover { color: var(--text-main); }
.nav-links .btn { color: var(--text-on-primary); }

/* ============================================================
   HERO
   ============================================================ */

.hero {
  padding: 160px 0 96px;
  background-color: var(--surface);
  background-image: var(--gradient-hero);
  position: relative;
  overflow: hidden;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: 'Inter', sans-serif;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--tertiary);
  background: rgba(0, 228, 117, 0.07);
  border: 1px solid rgba(0, 228, 117, 0.18);
  padding: 6px 14px;
  border-radius: 100px;
  margin-bottom: 32px;
}

.hero-headline {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.08;
  color: var(--text-main);
  max-width: 820px;
  margin-bottom: 24px;
}

.hero-sub {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 580px;
  line-height: 1.65;
  margin-bottom: 40px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 64px;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 0;
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 40px;
  max-width: 700px;
}

.hero-stat {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.hero-stat-value {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -0.02em;
}

.hero-stat-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.hero-stat-divider {
  width: 1px;
  height: 48px;
  background: rgba(255,255,255,0.08);
  margin: 0 32px;
}

/* ============================================================
   CARDS
   ============================================================ */

.cards-grid {
  display: grid;
  gap: 24px;
}

.cards-3 { grid-template-columns: repeat(3, 1fr); }
.cards-narrow { max-width: 860px; }

.card {
  background: var(--surface-container);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  flex-direction: column;
  transition: background 0.2s ease;
}

.card:hover { background: var(--surface-high); }

.stat-number {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2.75rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 16px;
}

.card-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 14px;
}

.card .stat-number {
  margin-bottom: 14px;
}

.card-body {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.65;
  flex: 1;
}

.card-source {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--outline-variant);
  margin-top: 20px;
}

.card-source a {
  color: var(--outline-variant);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color 0.15s ease;
}

.card-source a:hover {
  color: var(--primary);
}

/* Stat cards (pipeline stats) */
.stat-card {
  background: var(--surface-container);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.stat-card-number {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -0.03em;
  display: block;
  margin-bottom: 8px;
}

.stat-card-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.4;
}

/* ============================================================
   PIPELINE
   ============================================================ */

.pipeline {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 40px;
  padding: 32px;
  background: var(--surface-container);
  border-radius: var(--radius-lg);
}

.pipeline-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  background: var(--surface-high);
  border-radius: var(--radius);
  padding: 14px 20px;
  min-width: 90px;
}

.pipeline-node-end {
  background: rgba(187, 195, 255, 0.08);
  border: 1px solid rgba(187, 195, 255, 0.18);
}

.pipeline-name {
  font-family: 'Inter', sans-serif;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--primary);
}

.pipeline-role {
  font-family: 'Inter', sans-serif;
  font-size: 0.7rem;
  color: var(--text-muted);
}

.pipeline-arrow {
  color: var(--outline-variant);
  font-size: 1.1rem;
  flex-shrink: 0;
}

.callout {
  background: rgba(187, 195, 255, 0.05);
  border-left: 2px solid var(--primary);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 20px 24px;
  margin-bottom: 40px;
}

.callout p {
  font-size: 0.925rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ============================================================
   TWO COLUMN LAYOUT
   ============================================================ */

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.two-col-left p,
.two-col-right p {
  margin-bottom: 18px;
  font-size: 0.95rem;
}

.single-col {
  max-width: 760px;
}

.single-col-differentiator {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.differentiator-body {
  margin-top: 24px;
}

.differentiator-body p {
  margin-bottom: 18px;
  font-size: 0.95rem;
}

/* ============================================================
   DIFFERENTIATOR
   ============================================================ */

.pull-quote {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.4;
  letter-spacing: -0.01em;
  border-left: 2px solid var(--primary);
  padding-left: 24px;
  margin-bottom: 16px;
  font-style: normal;
}

.pull-quote-context {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 0 !important;
}

.receipts {
  background: var(--surface-container);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-top: 24px;
}

.receipts-label {
  font-family: 'Inter', sans-serif;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--tertiary);
  margin-bottom: 16px !important;
}

.receipts-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.receipts-list li {
  font-size: 0.875rem;
  color: var(--text-muted);
  padding-left: 20px;
  position: relative;
  line-height: 1.5;
}

.receipts-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 7px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--tertiary);
}

/* ============================================================
   SERVICES
   ============================================================ */

.service-card {
  position: relative;
  padding-top: 40px;
}

.service-tier-label {
  font-family: 'Inter', sans-serif;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  display: block;
  margin-bottom: 8px;
}

.service-tagline {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-style: italic;
  margin-bottom: 24px;
}

.service-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
  flex: 1;
}

.service-list li {
  font-size: 0.875rem;
  color: var(--text-muted);
  padding-left: 18px;
  position: relative;
  line-height: 1.5;
}

.service-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--primary);
}

.service-best {
  font-size: 0.8rem;
  color: var(--outline-variant);
  font-style: italic;
  margin-bottom: 20px;
  line-height: 1.5;
}

.service-card-featured {
  background: rgba(60, 89, 253, 0.08);
  border: 1px solid rgba(187, 195, 255, 0.15);
  position: relative;
}

.service-badge {
  position: absolute;
  top: -1px;
  right: 24px;
  background: var(--gradient-primary);
  color: var(--text-on-primary);
  font-family: 'Inter', sans-serif;
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
}

/* ============================================================
   SPEKBOARD
   ============================================================ */

.spekboard-layout {
  align-items: center;
  gap: 56px;
}

.spekboard-copy p {
  margin-bottom: 16px;
}

.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 24px 0 32px;
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.check {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: rgba(0, 228, 117, 0.12);
  border: 1px solid rgba(0, 228, 117, 0.3);
  flex-shrink: 0;
  display: inline-block;
  margin-top: 2px;
  position: relative;
}

.check::after {
  content: '';
  position: absolute;
  left: 4px;
  top: 2px;
  width: 5px;
  height: 8px;
  border: 1.5px solid var(--tertiary);
  border-top: none;
  border-left: none;
  transform: rotate(45deg);
}

.spekboard-ctas {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* SpekBoard mock panel */
.mock-panel {
  background: var(--surface-container);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.05);
  box-shadow: var(--shadow-float);
}

.mock-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  background: var(--surface-high);
}

.mock-title {
  font-family: 'Inter', sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-main);
  letter-spacing: 0.01em;
}

.mock-badge {
  font-family: 'Inter', sans-serif;
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 100px;
}

.mock-badge-live {
  background: rgba(0, 228, 117, 0.1);
  color: var(--tertiary);
  border: 1px solid rgba(0, 228, 117, 0.2);
  display: flex;
  align-items: center;
  gap: 6px;
}

.mock-issue {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.03);
  transition: background 0.15s;
}

.mock-issue:hover { background: var(--surface-high); }

.mock-issue-active {
  background: rgba(187, 195, 255, 0.03);
}

.mock-issue-status {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.mock-status-progress { background: #f59e0b; animation: pulse 2s infinite; }
.mock-status-review   { background: #38bdf8; }
.mock-status-done     { background: var(--tertiary); }

.mock-issue-content {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
  min-width: 0;
}

.mock-issue-id {
  font-family: 'Inter', sans-serif;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--outline-variant);
  white-space: nowrap;
}

.mock-issue-title {
  font-family: 'Inter', sans-serif;
  font-size: 0.825rem;
  color: var(--text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.mock-issue-agent {
  font-family: 'Inter', sans-serif;
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--secondary);
  background: rgba(205, 189, 255, 0.08);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.mock-footer {
  padding: 12px 20px;
  background: var(--surface-highest);
}

.mock-footer-text {
  font-family: 'Inter', sans-serif;
  font-size: 0.72rem;
  color: var(--outline-variant);
}

/* ============================================================
   DISCIPLINES
   ============================================================ */

.disciplines {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.discipline {
  display: flex;
  gap: 40px;
  padding: 40px 0;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  align-items: flex-start;
}

.discipline-num {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2rem;
  font-weight: 700;
  color: rgba(187, 195, 255, 0.2);
  letter-spacing: -0.02em;
  flex-shrink: 0;
  width: 56px;
  line-height: 1;
  padding-top: 4px;
}

.discipline-content { flex: 1; }

.discipline-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 10px;
}

.discipline-body {
  font-size: 0.925rem;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 680px;
}

/* ============================================================
   ABOUT
   ============================================================ */

.about-layout { align-items: start; }

.about-layout .two-col-left p {
  font-size: 0.95rem;
  line-height: 1.75;
}

.vesper-card {
  background: var(--surface-container);
  border-radius: var(--radius-lg);
  padding: 28px;
  border: 1px solid rgba(205, 189, 255, 0.1);
}

.vesper-label {
  font-family: 'Inter', sans-serif;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--secondary);
  display: block;
  margin-bottom: 16px;
}

.vesper-text {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-style: italic;
  line-height: 1.7;
  margin-bottom: 14px !important;
}

.vesper-link {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--primary);
  margin-top: 8px;
  transition: opacity 0.15s;
}

.vesper-link:hover { opacity: 0.75; }

/* ============================================================
   CTA SECTION
   ============================================================ */

.section-cta {
  background: linear-gradient(135deg, rgba(60,89,253,0.12) 0%, rgba(187,195,255,0.04) 100%);
  text-align: center;
  border-top: 1px solid rgba(187, 195, 255, 0.08);
}

.cta-heading {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-main);
  margin-bottom: 16px;
}

.cta-body {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 580px;
  margin: 0 auto 40px;
}

.cta-email {
  margin-top: 20px;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.cta-email a {
  color: var(--primary);
}

/* ============================================================
   FOOTER
   ============================================================ */

.footer {
  background: var(--surface-highest);
  padding: 56px 0 32px;
  border-top: 1px solid rgba(255,255,255,0.05);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 48px;
  align-items: start;
}

.footer-wordmark {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-main);
  margin-bottom: 8px;
}

.footer-tagline {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-nav {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-nav a {
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: color 0.15s;
}

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

.footer-social {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-social a {
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: color 0.15s;
}

.footer-social a:hover { color: var(--text-main); }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.05);
  padding-top: 24px;
}

.footer-bottom p {
  font-size: 0.8rem;
  color: var(--outline-variant);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 900px) {
  .cards-3 { grid-template-columns: 1fr; }
  .two-col { grid-template-columns: 1fr; gap: 40px; }
  .hero-stats { flex-direction: column; align-items: flex-start; gap: 24px; }
  .hero-stat-divider { display: none; }
  .pipeline { flex-direction: column; align-items: flex-start; }
  .pipeline-arrow { transform: rotate(90deg); }
  .footer-grid { grid-template-columns: 1fr; }
  .discipline { flex-direction: column; gap: 16px; }
  .discipline-num { font-size: 1.5rem; }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .hero { padding: 120px 0 64px; }
  .nav-links a:not(.btn) { display: none; }
  .hero-headline { font-size: 2.25rem; }
  .hero-buttons { flex-direction: column; }
  .hero-buttons .btn { text-align: center; }
}