/* ==========================================================================
   VibeTune Landing Page Stylesheet
   Design System: Supabase (Modern, Developer-Focused, 8px Grid, 6px Radius)
   ========================================================================== */

:root {
  /* Supabase Brand Colors */
  --color-primary: #72E3AD;
  --color-primary-hover: #5fd8a0;
  --color-primary-border: #50C896;
  
  --color-secondary: #0C0F24;
  --color-secondary-light: #161B3D;
  
  --color-accent: #72E3AD;
  --color-accent-dim: rgba(114, 227, 173, 0.16);
  --color-accent-dark: #10B981;
  
  --color-bg: #FDFDFD;
  --color-surface: #FFFFFF;
  --color-surface-subtle: #F9F9F9;
  
  --color-text-primary: #030303;
  --color-text-secondary: #4B5563;
  --color-text-muted: #6B7280;
  
  --color-border: #D8D8D8;
  --color-border-subtle: #E5E7EB;
  --color-link: #1A2DCC;

  /* Alert / Tag Colors */
  --color-red: #EF4444;
  --color-yellow: #F59E0B;
  --color-cyan: #06B6D4;

  /* Typography */
  --font-heading: 'Manrope', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Supabase Spec: 6px standard radius, 8px rhythm */
  --radius-standard: 6px;
  --space-unit: 8px;

  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 32px;
  --space-xl: 48px;
  --space-2xl: 64px;
  --space-3xl: 80px;

  --container-max-width: 1160px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 15px; /* Supabase Body Token: 15px */
}

body {
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-image: 
    radial-gradient(rgba(216, 216, 216, 0.4) 1px, transparent 1px);
  background-size: 32px 32px;
  background-position: -19px -19px;
}

.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* HEADER & NAVBAR */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(253, 253, 253, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo-link {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.brand-svg {
  display: block;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-item {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color 0.15s;
}

.nav-item:hover {
  color: var(--color-text-primary);
}

/* BUTTONS (Supabase Tokens: 6px radius, zero elevation shadow, flat border) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: var(--radius-standard);
  border-style: solid;
  border-width: 1px;
  cursor: pointer;
  text-decoration: none;
  box-shadow: none; /* strictly flat as detected */
  transition: all 0.15s ease;
  line-height: 1.4;
  white-space: nowrap;
}

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

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

.btn-secondary {
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  background-color: #F3F4F6;
  border-color: #C0C0C0;
}

.btn-hero {
  padding: 11px 22px;
  font-size: 15px;
}

.btn-large {
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 700;
}

/* CARDS (Flat with crisp #D8D8D8 border and 6px radius) */
.card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-standard);
  padding: 24px;
  box-shadow: none;
}

/* HERO SECTION */
.hero-section {
  padding: var(--space-3xl) 0 var(--space-2xl);
  border-bottom: 1px solid var(--color-border);
  position: relative;
}

.hero-container {
  width: 100%;
}

.hero-content {
  width: 100%;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-standard);
  padding: 5px 14px;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--color-text-secondary);
  margin-bottom: 22px;
}

.badge-tag {
  color: var(--color-accent-dark);
  font-weight: 700;
}

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

.badge-platform {
  color: var(--color-text-primary);
}

.hero-title {
  font-family: var(--font-heading);
  font-size: 48px; /* Supabase H1 Token */
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -1.2px;
  color: var(--color-text-primary);
  margin-bottom: 16px;
}

.hero-subtitle {
  font-size: 19px;
  font-weight: 500;
  color: var(--color-text-secondary);
  line-height: 1.5;
  margin-bottom: 32px;
  max-width: 980px;
}

.hero-explanation-card {
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-standard);
  padding: 32px 36px;
  margin-bottom: 36px;
  border-left: 5px solid var(--color-primary);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.02);
}

.explanation-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 700;
  color: var(--color-accent-dark);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
}

.dot-green {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-accent-dark);
}

.explanation-title {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 800;
  color: var(--color-text-primary);
  margin-bottom: 14px;
}

.explanation-text {
  font-size: 16px;
  color: var(--color-text-secondary);
  line-height: 1.75;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-link-more {
  font-size: 14.5px;
  font-weight: 600;
  color: var(--color-link);
  text-decoration: none;
  margin-left: 8px;
}

.hero-link-more:hover {
  text-decoration: underline;
}

/* SECTION SHARED STYLES */
.section {
  padding: var(--space-3xl) 0;
  border-bottom: 1px solid var(--color-border);
}

.section-heading {
  margin-bottom: var(--space-xl);
  max-width: 820px;
}

.heading-tag {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--color-accent-dark);
  margin-bottom: 8px;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 34px;
  font-weight: 800;
  letter-spacing: -0.6px;
  color: var(--color-text-primary);
  margin-bottom: 12px;
}

.section-subtitle {
  font-size: 16px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* SECTION 2: 3 НАХОДКИ */
.findings-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 32px;
}

.finding-card {
  display: flex;
  flex-direction: column;
}

.card-pill {
  display: inline-block;
  align-self: flex-start;
  font-size: 11px;
  font-weight: 700;
  border-radius: var(--radius-standard);
  padding: 3px 8px;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.pill-red {
  background-color: #FEE2E2;
  color: #B91C1C;
  border: 1px solid #FCA5A5;
}

.pill-yellow {
  background-color: #FEF3C7;
  color: #B45309;
  border: 1px solid #FCD34D;
}

.pill-cyan {
  background-color: #E0F2FE;
  color: #0369A1;
  border: 1px solid #BAE6FD;
}

.finding-card-title {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 14px;
}

.finding-highlight-metric {
  display: flex;
  align-items: center;
  gap: 14px;
  background-color: var(--color-surface-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-standard);
  padding: 14px 16px;
  margin-bottom: 16px;
}

.metric-num {
  font-family: var(--font-heading);
  font-size: 34px;
  font-weight: 800;
  color: var(--color-red);
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.metric-desc {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-secondary);
  line-height: 1.4;
}

.finding-card-desc,
.finding-card-intro {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
  flex-grow: 1;
}

.finding-caveat {
  font-size: 12.5px;
  color: var(--color-accent-dark);
  font-weight: 600;
  margin-bottom: 10px;
}

.mcp-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 13.5px;
  color: var(--color-text-secondary);
  margin-bottom: 16px;
  flex-grow: 1;
}

.mcp-list li {
  position: relative;
  padding-left: 14px;
}

.mcp-list li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--color-accent-dark);
  font-weight: bold;
}

.code-snippet {
  background-color: #0C0F24;
  color: #E2E8F0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  padding: 10px 12px;
  border-radius: var(--radius-standard);
  overflow-x: auto;
  border: 1px solid #23294C;
}

.report-meta-box {
  display: flex;
  align-items: center;
  gap: 12px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-standard);
  padding: 16px 20px;
  font-size: 14.5px;
  color: var(--color-text-primary);
}

.meta-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--color-accent-dark);
}

/* SECTION 3: WORKFLOW (HORIZONTAL CARDS) */
.workflow-steps {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 40px;
}

.workflow-step-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-standard);
  padding: 24px 32px;
  display: grid;
  grid-template-columns: 280px 1fr;
  align-items: center;
  gap: 32px;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.workflow-step-card:hover {
  border-color: #B0B0B0;
}

.step-card-header {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
}

.step-badge {
  font-family: var(--font-heading);
  font-size: 11.5px;
  font-weight: 800;
  background-color: var(--color-secondary);
  color: var(--color-primary);
  border-radius: var(--radius-standard);
  padding: 3px 9px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.step-card-title {
  font-family: var(--font-heading);
  font-size: 19px;
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1.3;
}

.step-card-body {
  display: flex;
  align-items: center;
}

.step-card-text {
  font-size: 14.5px;
  color: var(--color-text-secondary);
  line-height: 1.65;
}

.benchmark-quote-card {
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-standard);
  padding: 32px;
}

.benchmark-pill-top {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--color-accent-dark);
  margin-bottom: 12px;
}

.benchmark-quote {
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text-primary);
  margin-bottom: 16px;
  font-style: normal;
}

.benchmark-author-meta {
  display: flex;
  align-items: center;
  gap: 8px;
}

.author-name {
  font-weight: 700;
  color: var(--color-text-primary);
}

.author-label {
  color: var(--color-text-muted);
}

/* SECTION 4: ПРОМТ БЛОК */
.prompt-section {
  background-color: var(--color-surface-subtle);
}

.prompt-box {
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-standard);
  overflow: hidden;
}

.prompt-box-header {
  background-color: #FFFFFF;
  border-bottom: 1px solid var(--color-border);
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.prompt-header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.version-chip {
  font-size: 12px;
  font-weight: 700;
  background-color: var(--color-secondary);
  color: var(--color-primary);
  border-radius: var(--radius-standard);
  padding: 4px 10px;
}

.prompt-ready-state {
  font-size: 13.5px;
  color: var(--color-text-muted);
  font-weight: 500;
}

.prompt-header-actions {
  display: flex;
  gap: 12px;
}

.prompt-editor-wrap {
  padding: 20px 24px;
  background-color: #F9F9F9; /* Supabase Input Background Token */
}

/* INPUT COMPONENT TOKEN: Background #F9F9F9, Text #030303, Border #D8D8D8, Radius 6px, Shadow none */
#prompt-textarea {
  width: 100%;
  min-height: 160px;
  background-color: #FFFFFF;
  color: var(--color-text-primary);
  font-family: var(--font-mono);
  font-size: 14.5px;
  line-height: 1.6;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-standard);
  padding: 16px;
  resize: vertical;
  box-shadow: none;
  outline: none;
}

#prompt-textarea:focus {
  border-color: var(--color-accent-dark);
}

.prompt-box-footer {
  background-color: #FFFFFF;
  border-top: 1px solid var(--color-border);
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.prompt-precheck-hint {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: var(--color-text-secondary);
}

.hint-symbol {
  color: var(--color-accent-dark);
  font-weight: 700;
}

.link-safety-anchor {
  color: var(--color-link);
  font-weight: 600;
  text-decoration: none;
}

.link-safety-anchor:hover {
  text-decoration: underline;
}

/* SECTION 5: SAFETY & DATA */
.phone-bill-analogy {
  display: flex;
  align-items: center;
  gap: 16px;
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-standard);
  padding: 18px 24px;
  margin-top: 20px;
  font-size: 15px;
  color: var(--color-text-primary);
  line-height: 1.6;
}

.phone-icon {
  font-size: 28px;
}

.data-split-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  margin-bottom: 32px;
}

.data-card {
  padding: 28px;
}

.data-card-header {
  margin-bottom: 20px;
}

.data-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: var(--radius-standard);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

.badge-green {
  background-color: rgba(114, 227, 173, 0.2);
  color: #047857;
  border: 1px solid #10B981;
}

.badge-lock {
  background-color: #EFF6FF;
  color: #1D4ED8;
  border: 1px solid #93C5FD;
}

.data-card-title {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text-primary);
}

.data-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-size: 14px;
  color: var(--color-text-secondary);
}

.data-list li {
  position: relative;
  padding-left: 24px;
}

.list-check li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: #10B981;
  font-weight: 800;
}

.list-shield li::before {
  content: "🔒";
  position: absolute;
  left: 0;
  font-size: 13px;
}

.clarification-panel {
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-standard);
  padding: 24px 28px;
}

.clarification-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  background-color: #FEF3C7;
  color: #92400E;
  border: 1px solid #FCD34D;
  border-radius: var(--radius-standard);
  padding: 2px 8px;
  margin-bottom: 12px;
  text-transform: uppercase;
}

.clarification-text {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* SECTION 6: ZERO EXECUTION MODEL */
.security-cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.sec-card {
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
}

.sec-card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-standard);
  background-color: rgba(114, 227, 173, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}

.sec-card-title {
  font-family: var(--font-heading);
  font-size: 19px;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 12px;
}

.sec-card-desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.65;
}

.return-prompt-container {
  display: flex;
  justify-content: center;
}

/* FOOTER */
.footer {
  background-color: #FFFFFF;
  border-top: 1px solid var(--color-border);
  padding: 64px 0 48px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
}

.footer-logo-title {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 800;
  margin-bottom: 8px;
}

.footer-tagline {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 12px;
  max-width: 420px;
}

.footer-author {
  font-size: 13.5px;
  color: var(--color-text-muted);
}

.footer-nav {
  display: flex;
  gap: 64px;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col-title {
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-text-primary);
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}

.footer-col a {
  font-size: 14px;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color 0.15s;
}

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

/* TOAST */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background-color: var(--color-secondary);
  color: #FFFFFF;
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-standard);
  padding: 12px 20px;
  font-size: 14px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
  transform: translateY(100px);
  opacity: 0;
  visibility: hidden;
  transition: all 0.25s ease;
  z-index: 1000;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.toast-check {
  color: var(--color-primary);
  font-weight: bold;
}

/* RESPONSIVE */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .findings-grid,
  .security-cards-grid {
    grid-template-columns: 1fr;
  }
  .data-split-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 860px) {
  .workflow-step-card {
    grid-template-columns: 1fr;
    gap: 14px;
    padding: 20px 24px;
    align-items: flex-start;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-nav {
    flex-direction: column;
    gap: 24px;
  }
  .prompt-box-header {
    flex-direction: column;
    align-items: flex-start;
  }
  .prompt-header-actions {
    width: 100%;
  }
  .prompt-header-actions .btn {
    flex: 1;
  }
}