/* 
  NotionSafe: The Digital Vault Design System
  Core Philosophy: Architectural, Secure, and Quiet.
*/

:root {
  /* Light Mode - Tonal Azure Palette */
  --surface: #f8fafc;
  --surface-container-low: #f1f5f9;
  --surface-container-lowest: #ffffff;
  --surface-container-high: #e2e8f0;
  --surface-container-highest: #cbd5e1;
  --surface-bright: #ffffff;
  --on-surface: #0f172a;
  --on-surface-variant: #475569;
  
  --primary: #2563eb;
  --primary-container: #dbeafe;
  --on-primary: #ffffff;
  
  --secondary: #0d9488;
  --secondary-container: #ccfbf1;
  --on-secondary: #ffffff;

  --tertiary: #7c3aed;
  
  --outline-variant: rgba(148, 163, 184, 0.2);
  --shadow-tint: rgba(37, 99, 235, 0.08);
  
  /* Spacing Scale */
  --space-1: 0.2rem;
  --space-2: 0.4rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-8: 2rem;
  
  /* Radii */
  --radius-sm: 0.75rem;
  --radius-md: 1.5rem;
  --radius-lg: 2.5rem;
  
  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.dark-theme {
  /* Dark Mode - Midnight Slate Palette */
  --surface: #0b0f1a;
  --surface-container-low: #161e2e;
  --surface-container-lowest: #1e293b;
  --surface-container-high: #243045;
  --surface-container-highest: #2d3a54;
  --surface-bright: #334155;
  --on-surface: #f1f5f9;
  --on-surface-variant: #94a3b8;
  
  --primary: #60a5fa;
  --primary-container: #1e3a8a;
  --on-primary: #0f172a;
  
  --secondary: #2dd4bf;
  --secondary-container: #134e4a;
  
  --outline-variant: rgba(255, 255, 255, 0.06);
  --shadow-tint: rgba(0, 0, 0, 0.4);
}

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

html {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-size: 16px;
}

/* Prevent flash by applying theme background immediately */
html.dark-theme {
  background-color: #0e1011;
}

body {
  background-color: var(--surface);
  color: var(--on-surface);
  line-height: 1.6;
  transition: background-color var(--transition-slow), color var(--transition-slow);
  font-size: 1rem;
}

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

a:hover {
  text-decoration: none;
}

/* Typography */
h1, h2, h3, h4 {
  color: var(--on-surface);
  letter-spacing: -0.02em;
  font-weight: 700;
  scroll-margin-top: 100px;
}

h1 { font-size: 2.5rem; line-height: 1.1; margin-bottom: var(--space-4); }
h2 { font-size: 1.8rem; line-height: 1.2; margin-bottom: var(--space-3); }
h3 { font-size: 1.3rem; line-height: 1.3; }

p {
  color: var(--on-surface-variant);
  font-size: 1rem;
  margin-bottom: var(--space-3);
}

.label-md {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--on-surface-variant);
  margin-bottom: var(--space-2);
}

/* Layout Elements */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

section {
  padding: var(--space-8) 0;
}

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

body:not(.dark-theme) .section-alt {
    background-color: var(--surface-container-high);
}

/* Header & Nav */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(248, 250, 252, 0.8);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--outline-variant);
}

.dark-theme header {
  background-color: rgba(11, 15, 26, 0.85);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 800;
  font-size: 1.25rem;
  text-decoration: none;
  color: var(--on-surface);
  letter-spacing: -0.03em;
}

.logo span {
    background: linear-gradient(135deg, var(--primary), var(--tertiary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo img, .favicon, img[src*="logo.png"], img[src*="logo_round.png"] {
  border-radius: 50%;
}

#footer-logo, footer img {
    border-radius: 50%;
}

.nav-links {
  display: flex;
  gap: var(--space-4);
  list-style: none !important;
  margin: 0 !important;
  padding: 0 !important;
}

.nav-links li {
    list-style: none !important;
}

.nav-links a {
  text-decoration: none;
  color: var(--on-surface-variant);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color var(--transition-fast);
}

.nav-links a:hover {
  color: var(--primary);
}

/* Theme Toggle Fix */
.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--on-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-2);
  border-radius: 50%;
  transition: background-color var(--transition-fast);
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
  stroke-width: 2;
  display: block;
}

.theme-toggle:hover {
  background-color: var(--surface-container-high);
}

/* Search Modal / Trigger */
.search-trigger {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: 0.5rem 1rem;
    background-color: var(--surface-container-high);
    border-radius: 1rem;
    color: var(--on-surface-variant);
    cursor: pointer;
    font-size: 0.85rem;
    transition: all var(--transition-fast);
}

.dark-theme .search-trigger {
    background-color: var(--surface-container-highest);
}

.search-trigger:hover {
    background-color: var(--surface-container-highest);
    color: var(--on-surface);
}

.search-trigger svg {
    width: 16px;
    height: 16px;
}

.search-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(8px);
    z-index: 1000;
    display: none;
    align-items: flex-start;
    justify-content: center;
    padding-top: 10vh;
}

.search-modal-content {
    width: 90%;
    max-width: 600px;
    background-color: var(--surface-container-lowest);
    border-radius: 1.5rem;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    overflow: hidden;
    position: relative;
    border: 1px solid var(--outline-variant);
}

.search-modal-header {
    padding: var(--space-4);
    border-bottom: 1px solid var(--outline-variant);
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.search-modal-input {
    flex: 1;
    border: none;
    background: none;
    font-size: 1.1rem;
    color: var(--on-surface);
    outline: none;
}

.search-modal-results {
    max-height: 60vh;
    overflow-y: auto;
    padding: var(--space-2);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  transition: all var(--transition-fast);
  cursor: pointer;
  border: none;
  gap: var(--space-2);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #1d4ed8);
  color: var(--on-primary);
  box-shadow: 0 4px 20px rgba(37, 99, 235, 0.2);
}

.dark-theme .btn-primary {
    background: linear-gradient(135deg, var(--primary), #3b82f6);
    box-shadow: 0 4px 20px rgba(96, 165, 250, 0.2);
}

.btn-primary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 8px 30px rgba(37, 99, 235, 0.3);
}

.btn-secondary {
  background-color: var(--surface-container-high);
  color: var(--on-surface);
  border: 1px solid var(--outline-variant);
}

.btn-secondary:hover {
    background-color: var(--surface-container-highest);
    transform: translateY(-1px);
}

/* Cards */
.card {
  background-color: var(--surface-container-low);
  padding: 1rem;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  box-shadow: 0 4px 12px var(--shadow-tint);
  border: 1px solid var(--outline-variant);
  border-top: 4px solid var(--primary);
  display: flex;
  flex-direction: column;
}

/* Cycle through accent colors for grid items */
.grid .card:nth-child(3n+1) { border-top-color: var(--primary); }
.grid .card:nth-child(3n+2) { border-top-color: var(--secondary); }
.grid .card:nth-child(3n) { border-top-color: var(--tertiary); }

.dark-theme .card {
  background-color: var(--surface-container-low);
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
  box-shadow: 0 12px 40px var(--shadow-tint);
  background-color: var(--surface-container-lowest);
}

.label-md {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: var(--primary-container);
    color: var(--primary);
    border-radius: 2rem;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-2);
}

.dark-theme .label-md {
    background-color: rgba(96, 165, 250, 0.1);
    color: var(--primary);
}

/* Grid for Features */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-4);
}

@media (min-width: 900px) {
    .grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Hero Section */
.hero {
  text-align: center;
  padding-top: var(--space-8);
  position: relative;
  overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -10%;
    right: -10%;
    width: 40%;
    height: 60%;
    background: radial-gradient(circle, var(--primary-container) 0%, transparent 70%);
    opacity: 0.5;
    z-index: -1;
    filter: blur(80px);
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -10%;
    left: -10%;
    width: 30%;
    height: 50%;
    background: radial-gradient(circle, var(--secondary-container) 0%, transparent 70%);
    opacity: 0.4;
    z-index: -1;
    filter: blur(80px);
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-visual {
    margin-top: 4rem;
    display: flex;
    gap: var(--space-5);
    background: none;
    box-shadow: none;
    overflow: visible;
    align-items: flex-start;
    justify-content: center;
}

.hero-visual-container {
    flex: 1;
    overflow: hidden;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-visual img {
    width: 100%;
    height: auto;
    box-shadow: 0 20px 60px var(--shadow-tint);
    display: block;
    border-radius: var(--radius-sm);
}

.hero-visual .halo-effect {
    flex: 1;
    max-width: 550px;
}

/* Halo / Glow Effect */
.halo-effect {
    position: relative;
    z-index: 1;
}

.halo-effect::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120%;
    height: 120%;
    background: radial-gradient(circle at 30% 30%, var(--primary) 0%, transparent 60%),
                radial-gradient(circle at 70% 70%, var(--secondary) 0%, transparent 60%);
    opacity: 0.15;
    filter: blur(50px);
    z-index: -1;
    pointer-events: none;
}

.dark-theme .halo-effect::after {
    opacity: 0.25;
    filter: blur(70px);
}

/* How It Works (Steps) */
.steps {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.step {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: var(--space-8);
}

/* More robust alternating */
.step:nth-child(even) {
    direction: rtl;
}

.step:nth-child(even) .step-content {
    direction: ltr;
}

.step:nth-child(even) .step-image {
    direction: ltr;
}

.step-image {
  overflow: visible;
  background-color: transparent;
  display: flex;
  justify-content: center;
}

.step-image img {
    max-width: 100%;
    height: auto;
    border-radius: 1rem;
}

/* Creator Section */
.creator {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  max-width: 800px;
  margin: 0 auto;
}

.creator-img {
  width: 120px !important;
  height: 120px !important;
  border-radius: 50%;
  background-color: var(--surface-container-high);
  flex-shrink: 0;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 4px solid var(--surface-container-lowest);
  box-shadow: 0 8px 24px var(--shadow-tint);
}

.creator-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Footer */
footer {
  padding: var(--space-5) 0;
  background-color: var(--surface-container-low);
  text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--space-4);
    margin-bottom: var(--space-4);
    flex-wrap: wrap;
}

/* Docs Layout - 3 Column */
.docs-container {
    display: grid;
    grid-template-columns: 240px 1fr 240px;
    gap: var(--space-5);
    align-items: start;
    padding-top: var(--space-3);
    padding-bottom: var(--space-8);
}

.docs-sidebar {
    position: sticky;
    top: 100px;
    padding: var(--space-4);
    background-color: rgba(226, 232, 240, 0.4);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--radius-md);
    border: 1px solid var(--outline-variant);
}

/* List Style Reset for Navigators */
.docs-sidebar ul, .docs-nav ul {
    list-style: none !important;
    padding: 0 !important;
    margin: 0 !important;
}

.docs-sidebar li, .docs-nav li {
    list-style: none !important;
}

.dark-theme .docs-sidebar {
    background-color: rgba(30, 41, 59, 0.4);
}

/* Button-styled Links for Wiki Navigators */
.docs-sidebar a, .docs-nav a {
    text-decoration: none;
    color: var(--on-surface-variant);
    font-weight: 600;
    font-size: 0.9rem;
    display: block;
    padding: 0.7rem 1.2rem;
    border-radius: 0.85rem;
    transition: all var(--transition-fast);
    margin-bottom: 0.4rem;
    border: 1px solid var(--outline-variant);
    background-color: var(--surface-container-high);
}

.dark-theme .docs-sidebar a, .dark-theme .docs-nav a {
    background-color: var(--surface-container-high);
    border-color: rgba(255,255,255,0.05);
}

.docs-sidebar a:hover, .docs-sidebar a.active, .docs-nav a:hover, .docs-nav a.active {
    background-color: var(--surface-container-lowest);
    color: var(--primary);
    border-color: var(--primary);
    box-shadow: 0 4px 12px var(--shadow-tint);
    transform: translateY(-1px);
}

.dark-theme .docs-sidebar a:hover, .dark-theme .docs-sidebar a.active, 
.dark-theme .docs-nav a:hover, .dark-theme .docs-nav a.active {
    background-color: var(--surface-container-highest);
    border-color: var(--primary);
}

/* On This Page Navigator */
.docs-nav {
    position: sticky;
    top: 100px;
    padding: var(--space-4);
    border-left: 1px solid var(--outline-variant);
}

.docs-nav a {
    font-size: 0.85rem;
    padding: 0.4rem 0.75rem;
}

.docs-nav a.active {
    background-color: var(--surface-container-lowest);
    color: var(--primary);
}

.docs-content h2, .docs-content h3 {
    margin-top: var(--space-5);
    margin-bottom: var(--space-2);
}

/* Search Modal Results Styling */
.search-result-item {
    padding: 1rem;
    cursor: pointer;
    border-radius: 1rem;
    transition: background-color var(--transition-fast);
    margin-bottom: 0.5rem;
}

.search-result-title {
    font-weight: 700;
    font-size: 1rem;
    color: var(--primary);
    display: block;
    margin-bottom: 0.25rem;
}

.search-result-page {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--on-surface-variant);
    display: block;
    margin-bottom: 0.5rem;
}

.search-result-snippet {
    font-size: 0.85rem;
    color: var(--on-surface);
}

/* Helper Classes for Responsive Layouts */
.flex-group {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.flex-center {
    justify-content: center;
}

.mobile-only {
    display: none;
}

/* Responsive Media Queries */
@media (max-width: 1100px) {
    .docs-container {
        grid-template-columns: 240px 1fr;
    }
    .docs-nav {
        display: none;
    }
}

@media (max-width: 900px) {
    .hero-visual {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-visual .halo-effect {
        max-width: 100%;
    }

    .docs-container {
        grid-template-columns: 1fr;
    }
    .docs-sidebar {
        position: static;
        margin-bottom: var(--space-5);
    }
}

@media (max-width: 768px) {
    :root {
        --space-8: 3rem;
    }

    .container {
        padding: 0 var(--space-5);
    }

    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    
    section {
        padding: var(--space-5) 0;
    }

    .mobile-only {
        display: flex;
    }

    .hide-mobile {
        display: none !important;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--surface-container-lowest);
        flex-direction: column;
        padding: var(--space-4) !important;
        gap: var(--space-3);
        border-bottom: 1px solid var(--outline-variant);
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        z-index: 100;
    }

    .nav-links.active {
        display: flex;
    }

    .step {
        grid-template-columns: 1fr;
        gap: var(--space-4);
        text-align: center;
    }

    .step:nth-child(even) {
        direction: ltr;
    }

    .creator {
        flex-direction: column;
        text-align: center;
    }

    .hero-content h1 {
        margin-bottom: var(--space-3);
    }

    .flex-center-mobile {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .flex-group {
        flex-direction: column;
        width: 100%;
    }

    .flex-group .btn {
        width: 100%;
    }

    .hero-visual {
        margin-top: 2rem;
    }
}