/* ===========================================
   CANDIDLABS DESIGN SYSTEM
   =========================================== */

/* Google Fonts Import */
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400&family=Poppins:wght@400;500;600&family=Space+Grotesk:wght@700&display=swap');

/* ===========================================
   CSS VARIABLES - LIGHT MODE (DEFAULT)
   =========================================== */
:root {
  /* Primary Colors */
  --color-primary: #1b708b;
  --color-accent: #2d9cba;
  --color-charcoal: #1e293b;
  --color-slate: #64748b;
  --color-light-gray: #f1f5f9;
  --color-white: #ffffff;

  /* Status Colors */
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;

  /* Light Mode Specific */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-card: #ffffff;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --border-color: #e2e8f0;
  --shadow-color: rgba(0, 0, 0, 0.1);

  /* Typography */
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Poppins', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;

  /* Container */
  --container-max: 1280px;
}

/* ===========================================
   DARK MODE VARIABLES
   =========================================== */
[data-theme="dark"] {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-card: #1e293b;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border-color: #334155;
  --shadow-color: rgba(0, 0, 0, 0.3);
  --color-primary: #2d9cba;
  --color-accent: #3eb8d4;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  transition: background-color var(--transition-normal), color var(--transition-normal);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

img {
  max-width: 100%;
  height: auto;
}

/* ===========================================
   TYPOGRAPHY
   =========================================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

@media (min-width: 768px) {
  h1 { font-size: 3rem; }
  h2 { font-size: 2.25rem; }
  h3 { font-size: 1.75rem; }
}

@media (min-width: 1024px) {
  h1 { font-size: 3.5rem; }
}

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

.text-secondary {
  color: var(--text-secondary);
}

.mono {
  font-family: var(--font-mono);
}

.placeholder-text {
  color: var(--text-muted);
  border-bottom: 1px dotted var(--text-muted);
}

/* ===========================================
   LAYOUT
   =========================================== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--space-xl);
  }
}

.section {
  padding: var(--space-2xl) 0;
}

@media (min-width: 768px) {
  .section {
    padding: var(--space-3xl) 0;
  }
}

/* ===========================================
   NAVIGATION
   =========================================== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  transition: background-color var(--transition-normal), box-shadow var(--transition-normal);
}

.navbar.scrolled {
  box-shadow: 0 2px 10px var(--shadow-color);
}

.navbar-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.logo {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1.5rem;
  color: var(--color-primary);
  transition: color var(--transition-fast);
}

.logo:hover {
  color: var(--color-accent);
}

.nav-menu {
  display: none;
  list-style: none;
  gap: var(--space-lg);
}

@media (min-width: 768px) {
  .nav-menu {
    display: flex;
  }
}

.nav-link {
  font-weight: 500;
  color: var(--text-secondary);
  padding: var(--space-sm) 0;
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition-fast);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

/* Dark Mode Toggle */
.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  transition: color var(--transition-fast), background-color var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle:hover {
  color: var(--color-primary);
  background-color: var(--bg-secondary);
}

.theme-toggle svg {
  width: 24px;
  height: 24px;
}

.theme-toggle .sun-icon {
  display: none;
}

[data-theme="dark"] .theme-toggle .moon-icon {
  display: none;
}

[data-theme="dark"] .theme-toggle .sun-icon {
  display: block;
}

/* Login Button */
.btn-login {
  display: none;
}

@media (min-width: 640px) {
  .btn-login {
    display: inline-flex;
  }
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}

@media (min-width: 768px) {
  .mobile-menu-toggle {
    display: none;
  }
}

.mobile-menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--text-primary);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.mobile-menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Menu */
.mobile-menu {
  display: none;
  position: absolute;
  top: 70px;
  left: 0;
  right: 0;
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  padding: var(--space-md);
  box-shadow: 0 4px 10px var(--shadow-color);
}

.mobile-menu.active {
  display: block;
}

@media (min-width: 768px) {
  .mobile-menu {
    display: none !important;
  }
}

.mobile-menu ul {
  list-style: none;
}

.mobile-menu li {
  border-bottom: 1px solid var(--border-color);
}

.mobile-menu li:last-child {
  border-bottom: none;
}

.mobile-menu a {
  display: block;
  padding: var(--space-md);
  color: var(--text-primary);
  font-weight: 500;
}

.mobile-menu a:hover {
  color: var(--color-primary);
  background-color: var(--bg-secondary);
}

/* ===========================================
   BUTTONS
   =========================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.875rem;
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

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

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

.btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

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

.btn-disabled {
  background-color: var(--text-muted);
  color: var(--bg-secondary);
  cursor: not-allowed;
  opacity: 0.6;
}

.btn-disabled:hover {
  background-color: var(--text-muted);
}

/* ===========================================
   CARDS
   =========================================== */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 30px var(--shadow-color);
  border-color: var(--color-primary);
}

.card-icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-md);
}

.card-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  margin-bottom: var(--space-sm);
}

.card-description {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: var(--space-md);
}

.card-link {
  font-weight: 500;
  font-size: 0.875rem;
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
}

.card-link::after {
  content: '→';
  transition: transform var(--transition-fast);
}

.card:hover .card-link::after {
  transform: translateX(4px);
}

.card-link.disabled {
  color: var(--text-muted);
  cursor: default;
}

.card-link.disabled::after {
  content: '';
}

/* External Links */
.external-links {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  margin-bottom: var(--space-xl);
  flex-wrap: wrap;
}

.btn-external {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius-md);
  font-weight: 500;
  text-decoration: none;
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.btn-external:hover {
  background: var(--color-accent);
  transform: translateY(-2px);
}

/* ===========================================
   BADGES
   =========================================== */
.badge {
  display: inline-flex;
  align-items: center;
  font-size: 0.75rem;
  font-weight: 500;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-success {
  background-color: rgba(16, 185, 129, 0.1);
  color: var(--color-success);
}

.badge-warning {
  background-color: rgba(245, 158, 11, 0.1);
  color: var(--color-warning);
}

.badge-error {
  background-color: rgba(239, 68, 68, 0.1);
  color: var(--color-error);
}

.badge-info {
  background-color: rgba(59, 130, 246, 0.1);
  color: #3b82f6;
}

/* ===========================================
   HERO SECTION
   =========================================== */
.hero {
  position: relative;
  padding: var(--space-3xl) 0;
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    radial-gradient(circle at 20% 50%, rgba(27, 112, 139, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(45, 156, 186, 0.06) 0%, transparent 40%),
    radial-gradient(circle at 40% 80%, rgba(27, 112, 139, 0.05) 0%, transparent 40%);
  pointer-events: none;
}

[data-theme="dark"] .hero::before {
  background-image:
    radial-gradient(circle at 20% 50%, rgba(45, 156, 186, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(62, 184, 212, 0.1) 0%, transparent 40%),
    radial-gradient(circle at 40% 80%, rgba(45, 156, 186, 0.08) 0%, transparent 40%);
}

.hero-content {
  position: relative;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero-title {
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

@media (min-width: 768px) {
  .hero-subtitle {
    font-size: 1.5rem;
  }
}

.hero-tagline {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

@media (min-width: 768px) {
  .hero-tagline {
    font-size: 1.125rem;
  }
}

/* ===========================================
   STATS SECTION
   =========================================== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

@media (min-width: 768px) {
  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
  }
}

.stat-card {
  text-align: center;
  padding: var(--space-lg);
}

.stat-number {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

@media (min-width: 768px) {
  .stat-number {
    font-size: 2.5rem;
  }
}

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

.stat-card-link {
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.2s, border-color 0.2s;
}

.stat-card-link:hover {
  transform: translateY(-2px);
  border-color: var(--color-primary);
}

.stat-card-link:hover .stat-number {
  color: var(--color-primary);
}

.stat-card-link:hover .stat-label {
  color: var(--color-text-primary);
}

.stat-card-spirit {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.08), rgba(16, 185, 129, 0.08));
  border-color: var(--color-primary);
}

.stat-tagline {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
  letter-spacing: 0.5px;
}

.stat-quote {
  font-size: 0.9rem;
  font-style: italic;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* ===========================================
   TOOLS GRID
   =========================================== */
.tools-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

@media (min-width: 640px) {
  .tools-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .tools-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

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

.tool-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: var(--space-md);
}

.tool-card-footer {
  margin-top: auto;
  padding-top: var(--space-md);
}

/* ===========================================
   REPORTS GRID
   =========================================== */
.reports-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

@media (min-width: 640px) {
  .reports-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .reports-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.report-preview {
  background-color: var(--bg-secondary);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-md);
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
  color: var(--text-muted);
  font-size: 0.875rem;
}

.report-preview-icon {
  font-size: 2rem;
  margin-bottom: var(--space-sm);
}

.report-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: var(--space-sm);
}

/* ===========================================
   PAGE HEADER
   =========================================== */
.page-header {
  background-color: var(--bg-secondary);
  padding: var(--space-2xl) 0;
  margin-bottom: var(--space-xl);
}

.page-title {
  margin-bottom: var(--space-sm);
}

.page-description {
  color: var(--text-secondary);
  max-width: 600px;
}

/* ===========================================
   ABOUT PAGE
   =========================================== */
.about-section {
  margin-bottom: var(--space-2xl);
}

.about-section:last-child {
  margin-bottom: 0;
}

.about-section h2 {
  margin-bottom: var(--space-md);
  color: var(--color-primary);
}

.about-section p {
  color: var(--text-secondary);
  max-width: 800px;
}

.capabilities-list {
  list-style: none;
  margin-top: var(--space-md);
}

.capabilities-list li {
  position: relative;
  padding-left: var(--space-lg);
  margin-bottom: var(--space-sm);
  color: var(--text-secondary);
}

.capabilities-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-success);
  font-weight: 600;
}

/* ===========================================
   FOOTER
   =========================================== */
.footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: var(--space-lg) 0;
  margin-top: auto;
}

.footer-content {
  text-align: center;
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* ===========================================
   UTILITY CLASSES
   =========================================== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.text-center {
  text-align: center;
}

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-sm); }
.mb-2 { margin-bottom: var(--space-md); }
.mb-3 { margin-bottom: var(--space-lg); }
.mb-4 { margin-bottom: var(--space-xl); }

/* Focus States */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

button:focus-visible,
a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}