/* Import Inter Font from Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  /* Colors - Dark mode (Default) */
  --bg-primary: #09090b;
  --bg-secondary: #18181b;
  --bg-tertiary: #27272a;
  --text-primary: #f4f4f5;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  --accent-color: #ffffff;
  --accent-hover: #e4e4e7;
  --accent-light: #27272a;
  
  /* Status Colors */
  --success: #22c55e;
  --success-bg: rgba(34, 197, 94, 0.1);
  --error: #ef4444;
  --error-bg: rgba(239, 68, 68, 0.1);
  
  /* Layout & Styling */
  --border-color: #27272a;
  --border-radius-sm: 8px;
  --border-radius-md: 12px;
  --border-radius-lg: 16px;
  --max-width: 1100px;
  --header-height: 70px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.5);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.6), 0 4px 6px -2px rgba(0, 0, 0, 0.4);
  
  /* Fonts */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
  
  --header-bg: rgba(9, 9, 11, 0.8);
}

[data-theme="light"] {
  /* Colors - Light mode */
  --bg-primary: #ffffff;
  --bg-secondary: #fafafa;
  --bg-tertiary: #f4f4f5;
  --text-primary: #18181b;
  --text-secondary: #52525b;
  --text-muted: #a1a1aa;
  --accent-color: #09090b;
  --accent-hover: #27272a;
  --accent-light: #f4f4f5;
  
  /* Status Colors */
  --success: #16a34a;
  --success-bg: #f0fdf4;
  --error: #dc2626;
  --error-bg: #fef2f2;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.04), 0 4px 6px -2px rgba(0, 0, 0, 0.02);
  
  --border-color: #e4e4e7;
  --header-bg: rgba(255, 255, 255, 0.8);
}

/* Nav Container & Theme Toggle */
.nav-container {
  display: flex;
  align-items: center;
  gap: 8px;
}

.theme-toggle-btn {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 8px;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  outline: none;
}

.theme-toggle-btn:hover {
  background: var(--bg-tertiary);
  border-color: var(--text-secondary);
}

.theme-toggle-btn:focus-visible {
  box-shadow: 0 0 0 2px var(--text-primary);
}

/* Global Reset */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

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

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

/* Header & Navigation */
header {
  height: var(--header-height);
  border-bottom: 1px solid var(--border-color);
  background-color: var(--header-bg);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.03em;
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-image {
  height: 28px;
  width: auto;
  object-fit: contain;
  display: inline-block;
}

nav ul {
  display: flex;
  list-style: none;
  gap: 32px;
  align-items: center;
}

nav a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  position: relative;
  padding: 4px 0;
}

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

nav a.active {
  color: var(--text-primary);
  font-weight: 600;
}

nav a.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--accent-color);
  border-radius: 2px;
}

/* Styled cixio.com Nav Button */
.btn-main-site {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  background-color: transparent;
  color: var(--text-primary) !important; /* Ensure it overrides default nav link colors */
  font-size: 0.9rem;
  font-weight: 500;
  transition: all var(--transition-fast);
  text-decoration: none;
  position: relative;
}

.btn-main-site::after {
  display: none !important; /* Prevent the active line indicator from showing under the button */
}

.btn-main-site:hover {
  border-color: var(--text-secondary);
  background-color: var(--bg-secondary);
  color: var(--text-primary) !important;
}

.btn-main-site svg {
  width: 14px;
  height: 14px;
  stroke-width: 2.5;
  transition: transform var(--transition-fast);
}

.btn-main-site:hover svg {
  transform: translate(1px, -1px); /* Subtle premium interaction shift on hover */
}

/* Main Content Wrapper */
main {
  flex: 1;
  padding: 48px 0;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border-radius: var(--border-radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
  gap: 8px;
}

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

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

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

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

/* Home Page */
.hero {
  text-align: center;
  max-width: 700px;
  margin: 40px auto 60px auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.15;
  color: var(--text-primary);
}

.hero p {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 580px;
}

/* Search Box Container */
.search-container {
  width: 100%;
  max-width: 500px;
  margin-top: 12px;
  position: relative;
}

.search-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  background-color: var(--bg-primary);
  transition: focus-within var(--transition-fast), border-color var(--transition-fast);
  padding: 4px;
}

.search-input-wrapper:focus-within {
  border-color: var(--text-primary);
  box-shadow: 0 0 0 2px rgba(9, 9, 11, 0.05), var(--shadow-lg);
}

.search-input-wrapper input {
  flex: 1;
  border: none;
  outline: none;
  padding: 14px 16px;
  font-size: 1rem;
  font-family: inherit;
  color: var(--text-primary);
  background: transparent;
}

.search-input-wrapper input::placeholder {
  color: var(--text-muted);
}

.search-input-wrapper button {
  padding: 12px 24px;
  border-radius: calc(var(--border-radius-md) - 4px);
}

.search-suggestion {
  margin-top: 12px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.search-suggestion code {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  padding: 2px 6px;
  border-radius: var(--border-radius-sm);
  font-family: monospace;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.search-suggestion code:hover {
  background-color: var(--border-color);
}

/* Features Grid */
.features-section {
  border-top: 1px solid var(--border-color);
  padding-top: 60px;
  margin-top: 40px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 32px;
}

.feature-card {
  padding: 32px;
  border-radius: var(--border-radius-md);
  border: 1px solid var(--border-color);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  background-color: var(--bg-secondary);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  background-color: var(--bg-primary);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--border-radius-sm);
  background-color: var(--accent-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.feature-icon svg {
  width: 24px;
  height: 24px;
  stroke: var(--text-primary);
}

.feature-card h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Gallery Page */
.page-title-section {
  margin-bottom: 40px;
}

.page-title-section h1 {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 8px;
}

.page-title-section p {
  color: var(--text-secondary);
}

.filters-wrapper {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 40px;
}

.gallery-search {
  width: 100%;
  max-width: 400px;
  position: relative;
}

.gallery-search input {
  width: 100%;
  padding: 12px 16px 12px 40px;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  font-family: inherit;
  font-size: 0.95rem;
  outline: none;
  transition: border-color var(--transition-fast);
}

.gallery-search input:focus {
  border-color: var(--text-primary);
}

.gallery-search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  color: var(--text-secondary);
}

.filters-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.filter-label {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
}

.filter-btn {
  background: none;
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 6px 16px;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  color: var(--text-secondary);
}

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

.filter-btn.active {
  background-color: var(--accent-color);
  color: var(--bg-primary);
  border-color: var(--accent-color);
}

/* Certificate Grid */
.certificate-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 32px;
}

.certificate-card {
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  overflow: hidden;
  background-color: var(--bg-primary);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.certificate-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--text-muted);
}

/* Certificate Placeholder for Gallery (Securing images) */
.cert-placeholder-container {
  aspect-ratio: 4 / 3;
  width: 100%;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--border-color);
  transition: background var(--transition-normal);
}

.certificate-card:hover .cert-placeholder-container {
  background: linear-gradient(135deg, var(--bg-tertiary) 0%, var(--border-color) 100%);
}

.cert-placeholder-pattern {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0.05;
  background-image: radial-gradient(var(--text-primary) 1px, transparent 0);
  background-size: 16px 16px;
  pointer-events: none;
}

.cert-placeholder-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 150px;
  height: 150px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.12) 0%, rgba(99, 102, 241, 0) 70%);
  filter: blur(8px);
  pointer-events: none;
  transition: transform var(--transition-normal), background var(--transition-normal);
}

[data-theme="light"] .cert-placeholder-glow {
  background: radial-gradient(circle, rgba(99, 102, 241, 0.06) 0%, rgba(99, 102, 241, 0) 70%);
}

.certificate-card:hover .cert-placeholder-glow {
  transform: translate(-50%, -50%) scale(1.2);
  background: radial-gradient(circle, rgba(99, 102, 241, 0.2) 0%, rgba(99, 102, 241, 0) 70%);
}

.cert-placeholder-content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  text-align: center;
  padding: 24px;
  width: 100%;
}

.cert-placeholder-logo {
  height: 24px;
  width: auto;
  object-fit: contain;
  opacity: 0.7;
  transition: opacity var(--transition-fast);
}

.certificate-card:hover .cert-placeholder-logo {
  opacity: 1;
}

.cert-placeholder-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 30px;
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.2);
  color: var(--success);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.certificate-card:hover .cert-placeholder-badge {
  transform: translateY(-2px);
  background: rgba(34, 197, 94, 0.15);
  border-color: rgba(34, 197, 94, 0.3);
  box-shadow: var(--shadow-md);
}

.cert-placeholder-id {
  font-family: monospace;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
  transition: color var(--transition-fast);
}

.certificate-card:hover .cert-placeholder-id {
  color: var(--text-secondary);
}

.cert-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.cert-issuer {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.cert-title {
  font-size: 1.15rem;
  font-weight: 600;
  line-height: 1.35;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.cert-recipient {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.cert-skills-container {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
}

.cert-skill-tag {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.75rem;
  font-weight: 500;
  padding: 3px 8px;
  border-radius: 6px;
  transition: all var(--transition-fast);
}

.certificate-card:hover .cert-skill-tag {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  border-color: var(--text-muted);
}

.cert-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--bg-tertiary);
}

.cert-id {
  font-family: monospace;
  font-weight: 500;
}

/* Certificate View Page (Details) */
.cert-detail-layout {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 48px;
  align-items: start;
}

.cert-display-section {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.cert-frame {
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 12px;
  background-color: var(--bg-secondary);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.cert-frame img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--border-radius-md);
  border: 1px solid var(--border-color);
}

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

.cert-info-section {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.verification-status {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  border-radius: var(--border-radius-md);
  font-size: 0.95rem;
}

.verification-status.valid {
  background-color: var(--success-bg);
  border: 1px solid rgba(22, 163, 74, 0.15);
  color: var(--success);
}

.verification-status.invalid {
  background-color: var(--error-bg);
  border: 1px solid rgba(220, 38, 38, 0.15);
  color: var(--error);
}

.status-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background-color: currentColor;
  color: #fff;
}

.status-badge svg {
  width: 14px;
  height: 14px;
  stroke: currentColor;
  stroke-width: 3;
}

.status-details {
  display: flex;
  flex-direction: column;
}

.status-title {
  font-weight: 600;
  font-size: 0.95rem;
}

.status-subtitle {
  font-size: 0.8rem;
  opacity: 0.85;
}

.cert-info-details h1 {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 8px;
}

.cert-info-details .cert-issuer-large {
  font-size: 1.1rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: 24px;
}

.info-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 24px;
}

.info-table tr {
  border-bottom: 1px solid var(--border-color);
}

.info-table td {
  padding: 14px 0;
  font-size: 0.95rem;
}

.info-table td:first-child {
  font-weight: 500;
  color: var(--text-secondary);
  width: 35%;
}

.info-table td:last-child {
  color: var(--text-primary);
}

.skills-tags-container {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.skill-tag {
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  padding: 4px 12px;
  border-radius: 12px;
}

.cert-description-box {
  margin-top: 12px;
}

.cert-description-box h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.cert-description-box p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Error/Not Found State */
.not-found-container {
  text-align: center;
  max-width: 500px;
  margin: 60px auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.not-found-icon {
  width: 64px;
  height: 64px;
  background-color: var(--error-bg);
  color: var(--error);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.not-found-icon svg {
  width: 32px;
  height: 32px;
}

.not-found-container h2 {
  font-size: 1.75rem;
  font-weight: 700;
}

.not-found-container p {
  color: var(--text-secondary);
}

/* Footer styling */
footer {
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-primary);
  padding: 40px 0;
  margin-top: auto;
}

.footer-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  color: var(--text-primary);
}

/* Custom Micro-animations & Loading Indicator */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
  animation: fadeIn 0.4s ease forwards;
}

/* Empty State Gallery */
.no-results {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 20px;
  color: var(--text-secondary);
  border: 1px dashed var(--border-color);
  border-radius: var(--border-radius-md);
  background-color: var(--bg-secondary);
}

/* Print CSS Styles */
@media print {
  @page {
    size: landscape;
    margin: 0;
  }

  html, body {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    background: #ffffff !important;
  }
  
  header, footer, .cert-actions, .verification-status, .gallery-search, .filters-wrapper, .search-container, .features-section, .hero, .page-title-section, .cert-info-section {
    display: none !important;
  }
  
  main {
    padding: 0 !important;
    margin: 0 !important;
  }
  
  .container {
    width: 100% !important;
    max-width: 100% !important;
    padding: 0 !important;
    margin: 0 !important;
  }
  
  .cert-detail-layout {
    display: block !important;
    width: 100% !important;
    height: 100% !important;
  }

  .cert-display-section {
    width: 100vw !important;
    height: 100vh !important;
    display: flex !important;
    justify-content: center !important;
    align-items: center !important;
    box-sizing: border-box !important;
  }
  
  .cert-frame {
    border: none !important;
    box-shadow: none !important;
    padding: 0 !important;
    background: transparent !important;
    width: 100% !important;
    height: 100% !important;
    display: flex !important;
    justify-content: center !important;
    align-items: center !important;
  }
  
  .cert-frame img {
    border: none !important;
    border-radius: 0 !important;
    max-width: 100% !important;
    max-height: 100% !important;
    object-fit: contain !important;
  }
}

/* Responsive Breakpoints */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.25rem;
  }
  
  .cert-detail-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .header-container {
    padding: 0;
  }
  
  nav ul {
    gap: 20px;
  }
  
  .footer-container {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
}

/* Dynamic Loading Spinner */
.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-color);
  border-top-color: var(--accent-color);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Accessibility Focus Indicator */
:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 4px;
}

/* Passcode Entry Screen Styles */
.passcode-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: calc(100vh - var(--header-height) - 180px);
  padding: 40px 20px;
}

.passcode-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 40px;
  width: 100%;
  max-width: 440px;
  text-align: center;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(12px);
  transition: transform var(--transition-normal);
}

[data-theme="dark"] .passcode-card {
  background: rgba(24, 24, 27, 0.6);
  border-color: rgba(255, 255, 255, 0.08);
}

.passcode-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 24px auto;
  background-color: var(--accent-light);
  color: var(--text-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
}

.passcode-icon svg {
  width: 24px;
  height: 24px;
  stroke-width: 2.2;
}

.passcode-card h2 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.passcode-card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  line-height: 1.5;
}

.passcode-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.passcode-input-container {
  position: relative;
}

.passcode-input {
  width: 100%;
  padding: 16px;
  font-size: 1.5rem;
  font-weight: 700;
  text-align: center;
  letter-spacing: 0.5em;
  text-indent: 0.25em; /* offsets the letter spacing of the last character for perfect centering */
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  outline: none;
  transition: all var(--transition-fast);
}

.passcode-input:focus {
  border-color: var(--text-primary);
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.1);
}

.passcode-error {
  display: none;
  font-size: 0.85rem;
  color: var(--error);
  background-color: var(--error-bg);
  padding: 8px 12px;
  border-radius: var(--border-radius-sm);
  border: 1px solid rgba(239, 68, 68, 0.15);
  margin-top: -8px;
  text-align: center;
  animation: fadeIn var(--transition-fast);
}

.passcode-card.shake {
  animation: shake 0.4s ease-in-out;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-6px); }
  40%, 80% { transform: translateX(6px); }
}