/* ==========================================================================
   LinkLister - Modern Business Design System
   A premium link management web application stylesheet.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Custom Properties
   -------------------------------------------------------------------------- */
:root {
  /* Brand Colors */
  --color-primary:        #1a365d;
  --color-primary-light:  #2a4a7f;
  --color-primary-dark:   #122748;
  --color-accent:         #3182ce;
  --color-accent-light:   #4299e1;
  --color-accent-dark:    #2b6cb0;
  --color-success:        #38a169;
  --color-success-light:  #c6f6d5;
  --color-success-dark:   #276749;
  --color-danger:         #e53e3e;
  --color-danger-light:   #fed7d7;
  --color-danger-dark:    #c53030;
  --color-warning:        #d69e2e;
  --color-warning-light:  #fefcbf;
  --color-warning-dark:   #b7791f;

  /* Neutrals */
  --color-white:          #ffffff;
  --color-gray-50:        #f7fafc;
  --color-gray-100:       #edf2f7;
  --color-gray-200:       #e2e8f0;
  --color-gray-300:       #cbd5e0;
  --color-gray-400:       #a0aec0;
  --color-gray-500:       #718096;
  --color-gray-600:       #4a5568;
  --color-gray-700:       #2d3748;
  --color-gray-800:       #1a202c;
  --color-gray-900:       #171923;

  /* Typography */
  --font-family:          'Inter', system-ui, -apple-system, BlinkMacSystemFont,
                          'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono:            'JetBrains Mono', 'Fira Code', ui-monospace, SFMono-Regular,
                          Menlo, Monaco, Consolas, monospace;
  --font-size-xs:         0.75rem;
  --font-size-sm:         0.875rem;
  --font-size-base:       1rem;
  --font-size-lg:         1.125rem;
  --font-size-xl:         1.25rem;
  --font-size-2xl:        1.5rem;
  --font-size-3xl:        1.875rem;

  /* Spacing */
  --spacing-1:            0.25rem;
  --spacing-2:            0.5rem;
  --spacing-3:            0.75rem;
  --spacing-4:            1rem;
  --spacing-5:            1.25rem;
  --spacing-6:            1.5rem;
  --spacing-8:            2rem;
  --spacing-10:           2.5rem;
  --spacing-12:           3rem;
  --spacing-16:           4rem;

  /* Borders */
  --radius-sm:            6px;
  --radius-md:            8px;
  --radius-lg:            12px;
  --radius-xl:            16px;
  --radius-full:          9999px;

  /* Shadows */
  --shadow-xs:            0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-sm:            0 1px 3px rgba(0, 0, 0, 0.08),
                          0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md:            0 4px 6px rgba(0, 0, 0, 0.06),
                          0 2px 4px rgba(0, 0, 0, 0.04);
  --shadow-lg:            0 10px 15px rgba(0, 0, 0, 0.07),
                          0 4px 6px rgba(0, 0, 0, 0.04);
  --shadow-xl:            0 20px 25px rgba(0, 0, 0, 0.08),
                          0 8px 10px rgba(0, 0, 0, 0.04);
  --shadow-focus:         0 0 0 3px rgba(49, 130, 206, 0.35);

  /* Transitions */
  --transition-fast:      150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base:      200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow:      300ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Layout */
  --header-height:        56px;
  --container-max:        680px;
  --container-padding:    var(--spacing-4);
}


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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: 400;
  line-height: 1.6;
  color: var(--color-gray-800);
  background-color: var(--color-gray-50);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

img,
svg {
  display: block;
  max-width: 100%;
}

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

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

ul,
ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  color: var(--color-gray-900);
}

h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }

p {
  margin-bottom: var(--spacing-4);
}

::selection {
  background-color: rgba(49, 130, 206, 0.2);
  color: var(--color-gray-900);
}


/* --------------------------------------------------------------------------
   3. Container
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}


/* --------------------------------------------------------------------------
   4. Main Header
   -------------------------------------------------------------------------- */
.main-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  padding: 0 var(--spacing-4);
  background-color: var(--color-primary);
  color: var(--color-white);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15),
              0 1px 2px rgba(0, 0, 0, 0.1);
}

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


/* --------------------------------------------------------------------------
   5. Logo
   -------------------------------------------------------------------------- */
.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  color: var(--color-white);
  text-decoration: none;
  font-weight: 700;
  font-size: var(--font-size-xl);
  letter-spacing: -0.02em;
  transition: opacity var(--transition-fast);
}

.logo:hover {
  opacity: 0.9;
  color: var(--color-white);
}

.logo svg,
.logo img {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}


/* --------------------------------------------------------------------------
   6. Navigation Links
   -------------------------------------------------------------------------- */
.main-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-1);
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-2) var(--spacing-4);
  color: rgba(255, 255, 255, 0.72);
  text-decoration: none;
  font-size: var(--font-size-sm);
  font-weight: 500;
  border-radius: var(--radius-md);
  border-bottom: 2px solid transparent;
  transition: color var(--transition-fast),
              background-color var(--transition-fast),
              border-color var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-white);
  background-color: rgba(255, 255, 255, 0.08);
}

.nav-link.active {
  color: var(--color-white);
  border-bottom-color: var(--color-accent-light);
}

.nav-link svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}


/* --------------------------------------------------------------------------
   7. Link Grid
   -------------------------------------------------------------------------- */
.link-grid {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
  padding: var(--spacing-4) 0;
}


/* --------------------------------------------------------------------------
   8. Link Cards
   -------------------------------------------------------------------------- */
.link-card {
  position: relative;
  display: flex;
  align-items: center;
  background-color: var(--color-white);
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius-md);
  padding: var(--spacing-4);
  box-shadow: var(--shadow-xs);
  transition: background-color var(--transition-fast),
              border-color var(--transition-fast);
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  -webkit-tap-highlight-color: transparent;
  min-height: 56px;
}

.link-card:hover {
  background-color: var(--color-gray-50);
  border-color: var(--color-gray-200);
}

.link-card:active {
  background-color: var(--color-gray-100);
}

.link-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--spacing-3);
  margin-bottom: var(--spacing-3);
}

.link-name {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-gray-900);
  line-height: 1.3;
  word-break: break-word;
}

.link-name a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

.link-url {
  display: block;
  font-size: var(--font-size-xs);
  color: var(--color-gray-400);
  font-family: var(--font-mono);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
  margin-bottom: 0;
}

.link-card-footer {
  display: none;
}

.link-card-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
}


/* --------------------------------------------------------------------------
   9. Status Badges
   -------------------------------------------------------------------------- */
.status-badge,
.link-status {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-1);
  padding: var(--spacing-1) var(--spacing-3);
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 0.025em;
  text-transform: uppercase;
  border-radius: var(--radius-full);
  line-height: 1.5;
  white-space: nowrap;
}

.status-badge::before,
.link-status::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* Online / Active */
.status-online,
.status-badge.status-online {
  color: var(--color-success-dark);
  background-color: var(--color-success-light);
}

.status-online::before {
  background-color: var(--color-success);
}

/* Offline / Down */
.status-offline,
.status-badge.status-offline {
  color: var(--color-danger-dark);
  background-color: var(--color-danger-light);
}

.status-offline::before {
  background-color: var(--color-danger);
}

/* Checking / Pending */
.status-checking,
.status-badge.status-checking {
  color: var(--color-gray-600);
  background-color: var(--color-gray-100);
}

.status-checking::before {
  background-color: var(--color-gray-400);
  animation: pulse 1.5s ease-in-out infinite;
}


/* --------------------------------------------------------------------------
   10. Search Bar
   -------------------------------------------------------------------------- */
.search-bar {
  position: relative;
  width: 100%;
  margin-bottom: var(--spacing-6);
}

.search-bar .search-icon {
  position: absolute;
  left: var(--spacing-4);
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--color-gray-400);
  pointer-events: none;
}

.search-bar input,
.search-input {
  width: 100%;
  padding: var(--spacing-3) var(--spacing-4) var(--spacing-3) var(--spacing-12);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--color-gray-800);
  background-color: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-full);
  outline: none;
  box-shadow: var(--shadow-xs);
  transition: border-color var(--transition-fast),
              box-shadow var(--transition-fast);
}

.search-bar input::placeholder,
.search-input::placeholder {
  color: var(--color-gray-400);
}

.search-bar input:focus,
.search-input:focus {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-focus);
}

/* Search bar without icon */
.search-bar input:only-child {
  padding-left: var(--spacing-5);
}


/* --------------------------------------------------------------------------
   11. Admin Table
   -------------------------------------------------------------------------- */
.admin-table-wrapper {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-gray-200);
  background-color: var(--color-white);
  box-shadow: var(--shadow-sm);
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
}

.admin-table thead {
  background-color: var(--color-gray-50);
  border-bottom: 2px solid var(--color-gray-200);
}

.admin-table th {
  padding: var(--spacing-3) var(--spacing-4);
  text-align: left;
  font-weight: 600;
  font-size: var(--font-size-xs);
  color: var(--color-gray-600);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.admin-table td {
  padding: var(--spacing-3) var(--spacing-4);
  color: var(--color-gray-700);
  border-bottom: 1px solid var(--color-gray-100);
  vertical-align: middle;
}

.admin-table tbody tr {
  transition: background-color var(--transition-fast);
}

.admin-table tbody tr:nth-child(even) {
  background-color: var(--color-gray-50);
}

.admin-table tbody tr:hover {
  background-color: rgba(49, 130, 206, 0.04);
}

.admin-table tbody tr:last-child td {
  border-bottom: none;
}

.admin-table .table-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
}

.admin-table .table-url {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--color-gray-500);
  max-width: 280px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}


/* --------------------------------------------------------------------------
   12. Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  padding: var(--spacing-2) var(--spacing-5);
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: 500;
  line-height: 1.5;
  color: var(--color-gray-700);
  background-color: var(--color-white);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-md);
  cursor: pointer;
  outline: none;
  white-space: nowrap;
  user-select: none;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn:hover {
  background-color: var(--color-gray-50);
  border-color: var(--color-gray-400);
  color: var(--color-gray-800);
}

.btn:focus-visible {
  box-shadow: var(--shadow-focus);
}

.btn:active {
  transform: scale(0.98);
}

.btn:disabled,
.btn.disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.btn svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* Primary */
.btn-primary {
  color: var(--color-white);
  background-color: var(--color-accent);
  border-color: var(--color-accent);
}

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

.btn-primary:focus-visible {
  box-shadow: 0 0 0 3px rgba(49, 130, 206, 0.4);
}

/* Danger */
.btn-danger {
  color: var(--color-white);
  background-color: var(--color-danger);
  border-color: var(--color-danger);
}

.btn-danger:hover {
  background-color: var(--color-danger-dark);
  border-color: var(--color-danger-dark);
  color: var(--color-white);
}

.btn-danger:focus-visible {
  box-shadow: 0 0 0 3px rgba(229, 62, 62, 0.4);
}

/* Success */
.btn-success {
  color: var(--color-white);
  background-color: var(--color-success);
  border-color: var(--color-success);
}

.btn-success:hover {
  background-color: var(--color-success-dark);
  border-color: var(--color-success-dark);
  color: var(--color-white);
}

/* Small */
.btn-sm {
  padding: var(--spacing-1) var(--spacing-3);
  font-size: var(--font-size-xs);
  border-radius: var(--radius-sm);
}

/* Icon-only */
.btn-icon {
  padding: var(--spacing-2);
  border-radius: var(--radius-md);
  line-height: 1;
}

.btn-icon.btn-sm {
  padding: var(--spacing-1);
}

/* Ghost (borderless) */
.btn-ghost {
  border-color: transparent;
  background-color: transparent;
}

.btn-ghost:hover {
  background-color: var(--color-gray-100);
  border-color: transparent;
}


/* --------------------------------------------------------------------------
   13. Modal
   -------------------------------------------------------------------------- */
.modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-6);
}

.modal.active {
  display: flex;
  animation: fadeIn var(--transition-slow) ease-out;
}

.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 1001;
}

.modal-content {
  position: relative;
  z-index: 1002;
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  background-color: var(--color-white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  animation: modalSlideIn var(--transition-slow) ease-out;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-6) var(--spacing-6) var(--spacing-4);
  border-bottom: 1px solid var(--color-gray-100);
}

.modal-header h2,
.modal-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-gray-900);
  margin: 0;
}

.modal-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: none;
  background: none;
  color: var(--color-gray-400);
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: color var(--transition-fast),
              background-color var(--transition-fast);
}

.modal-close:hover {
  color: var(--color-gray-700);
  background-color: var(--color-gray-100);
}

.modal-body {
  padding: var(--spacing-6);
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--spacing-3);
  padding: var(--spacing-4) var(--spacing-6) var(--spacing-6);
  border-top: 1px solid var(--color-gray-100);
}


/* --------------------------------------------------------------------------
   14. Forms
   -------------------------------------------------------------------------- */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
  margin-bottom: var(--spacing-5);
}

.form-group label,
.form-label {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-gray-700);
}

.form-group input,
.form-group textarea,
.form-group select,
.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--spacing-2) var(--spacing-3);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--color-gray-800);
  background-color: var(--color-white);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-md);
  outline: none;
  transition: border-color var(--transition-fast),
              box-shadow var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus,
.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-focus);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-gray-400);
}

.form-group textarea,
.form-textarea {
  resize: vertical;
  min-height: 80px;
}

.form-group select,
.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%23718096' viewBox='0 0 16 16'%3E%3Cpath d='M4.427 6.427l3.396 3.396a.25.25 0 00.354 0l3.396-3.396A.25.25 0 0011.396 6H4.604a.25.25 0 00-.177.427z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--spacing-3) center;
  padding-right: var(--spacing-10);
  cursor: pointer;
}

.form-hint {
  font-size: var(--font-size-xs);
  color: var(--color-gray-500);
}

.form-error {
  font-size: var(--font-size-xs);
  color: var(--color-danger);
}

.form-group.has-error input,
.form-group.has-error textarea,
.form-group.has-error select {
  border-color: var(--color-danger);
}

.form-group.has-error input:focus,
.form-group.has-error textarea:focus,
.form-group.has-error select:focus {
  box-shadow: 0 0 0 3px rgba(229, 62, 62, 0.3);
}

.form-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--spacing-3);
  margin-top: var(--spacing-6);
}


/* --------------------------------------------------------------------------
   15. Login Card
   -------------------------------------------------------------------------- */
.login-card {
  width: 100%;
  max-width: 400px;
  margin: var(--spacing-16) auto;
  padding: var(--spacing-8);
  background-color: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

.login-card .logo {
  color: var(--color-primary);
  justify-content: center;
  margin-bottom: var(--spacing-2);
}

.login-card h2,
.login-card-title {
  text-align: center;
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-2);
}

.login-card-subtitle {
  text-align: center;
  color: var(--color-gray-500);
  font-size: var(--font-size-sm);
  margin-bottom: var(--spacing-8);
}

.login-card .form-group:last-of-type {
  margin-bottom: var(--spacing-6);
}

.login-card .btn-primary {
  width: 100%;
  padding: var(--spacing-3) var(--spacing-5);
  font-size: var(--font-size-base);
}


/* --------------------------------------------------------------------------
   16. Alerts
   -------------------------------------------------------------------------- */
.alert {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-3);
  padding: var(--spacing-4) var(--spacing-5);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  line-height: 1.5;
  margin-bottom: var(--spacing-5);
  border: 1px solid transparent;
  animation: fadeIn var(--transition-base) ease-out;
}

.alert svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin-top: 1px;
}

.alert-success {
  color: var(--color-success-dark);
  background-color: var(--color-success-light);
  border-color: rgba(56, 161, 105, 0.2);
}

.alert-error {
  color: var(--color-danger-dark);
  background-color: var(--color-danger-light);
  border-color: rgba(229, 62, 62, 0.2);
}

.alert-info {
  color: var(--color-accent-dark);
  background-color: rgba(49, 130, 206, 0.1);
  border-color: rgba(49, 130, 206, 0.2);
}

.alert-warning {
  color: var(--color-warning-dark);
  background-color: var(--color-warning-light);
  border-color: rgba(214, 158, 46, 0.2);
}

.alert-dismiss {
  margin-left: auto;
  background: none;
  border: none;
  color: inherit;
  cursor: pointer;
  opacity: 0.6;
  padding: 0;
  transition: opacity var(--transition-fast);
}

.alert-dismiss:hover {
  opacity: 1;
}


/* --------------------------------------------------------------------------
   17. Stats Bar
   -------------------------------------------------------------------------- */
.stats-bar {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
}

.stats-bar .stat {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  font-size: var(--font-size-sm);
  color: var(--color-gray-600);
}

.stats-bar .stat-value {
  font-weight: 700;
  color: var(--color-gray-900);
}

.stats-bar .stat-divider {
  width: 1px;
  height: 16px;
  background-color: var(--color-gray-300);
}


/* --------------------------------------------------------------------------
   18. Footer
   -------------------------------------------------------------------------- */
.main-footer {
  padding: var(--spacing-8) 0;
  margin-top: var(--spacing-12);
  border-top: 1px solid var(--color-gray-200);
  text-align: center;
}

.main-footer p {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  margin-bottom: 0;
}

.main-footer a {
  color: var(--color-gray-600);
  font-weight: 500;
}

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


/* --------------------------------------------------------------------------
   19. Page Content Sections
   -------------------------------------------------------------------------- */
.page-content {
  padding: var(--spacing-8) 0;
}

.page-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-2);
}

.page-subtitle {
  font-size: var(--font-size-base);
  color: var(--color-gray-500);
  margin-bottom: var(--spacing-6);
}

.section {
  margin-bottom: var(--spacing-8);
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-5);
}

.section-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
}

/* Empty state */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-16) var(--spacing-8);
  text-align: center;
}

.empty-state svg {
  width: 48px;
  height: 48px;
  color: var(--color-gray-300);
  margin-bottom: var(--spacing-4);
}

.empty-state h3 {
  font-size: var(--font-size-lg);
  color: var(--color-gray-600);
  margin-bottom: var(--spacing-2);
}

.empty-state p {
  color: var(--color-gray-500);
  font-size: var(--font-size-sm);
  max-width: 360px;
  margin-bottom: var(--spacing-6);
}


/* --------------------------------------------------------------------------
   19b. Application-Specific Components
   -------------------------------------------------------------------------- */

/* Header inner layout */
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-1);
}

/* Page header with title and actions */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--spacing-3);
  padding: var(--spacing-5) 0 var(--spacing-3);
}

.page-header h1 {
  margin: 0;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
}

/* Search wrapper */
.search-wrapper {
  margin-bottom: var(--spacing-2);
}

/* Stats bar items */
.stat-item {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
}

.stat-checking {
  color: var(--color-gray-400);
}

/* Link card body */
.link-card-body {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-3);
  width: 100%;
}

.link-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
  flex: 1;
}

.link-info .link-url {
  margin-bottom: 0;
}

.link-card-body .status-badge {
  flex-shrink: 0;
}

/* Admin table extras */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-gray-200);
  background-color: var(--color-white);
  box-shadow: var(--shadow-sm);
}

.actions-col {
  width: 120px;
  text-align: right;
}

.td-name {
  font-weight: 500;
  color: var(--color-gray-900);
}

.td-url a {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--color-gray-500);
  word-break: break-all;
}

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

.td-date {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  white-space: nowrap;
}

.td-actions {
  text-align: right;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--spacing-2);
}

.inline-form {
  display: inline;
}

/* Settings section */
.settings-section {
  margin-top: var(--spacing-10);
  padding-top: var(--spacing-8);
  border-top: 1px solid var(--color-gray-200);
}

.settings-section h2 {
  margin-bottom: var(--spacing-6);
}

.settings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-4);
  margin-bottom: var(--spacing-6);
}

/* Button block variant */
.btn-block {
  width: 100%;
  display: flex;
  justify-content: center;
}

/* Login wrapper centering */
.login-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
}

.login-subtitle {
  text-align: center;
  color: var(--color-gray-500);
  font-size: var(--font-size-sm);
  margin-bottom: var(--spacing-6);
}

.login-logo {
  display: flex;
  justify-content: center;
  margin-bottom: var(--spacing-4);
  color: var(--color-accent);
}

.login-logo svg {
  width: 40px;
  height: 40px;
}

/* Logout icon in nav */
.nav-logout {
  opacity: 0.6;
  margin-left: var(--spacing-2);
}

.nav-logout:hover {
  opacity: 1;
}

/* Modal close button (text-based) */
.modal-close-btn {
  /* Inherits .btn styles */
}

/* No results message */
.no-results {
  text-align: center;
  padding: var(--spacing-8);
  color: var(--color-gray-500);
}

/* Passkey button on login */
.btn-passkey {
  padding: var(--spacing-4) var(--spacing-5);
  font-size: var(--font-size-base);
  gap: var(--spacing-3);
}

.btn-loading {
  opacity: 0.7;
  pointer-events: none;
}

/* Login divider ("oder") */
.login-divider {
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
  margin: var(--spacing-6) 0;
  color: var(--color-gray-400);
  font-size: var(--font-size-sm);
}

.login-divider::before,
.login-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background-color: var(--color-gray-200);
}

/* Password fallback (details/summary) */
.password-fallback {
  width: 100%;
}

.password-toggle {
  cursor: pointer;
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  padding: var(--spacing-2);
  list-style: none;
  user-select: none;
}

.password-toggle::-webkit-details-marker {
  display: none;
}

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

.password-fallback[open] .password-toggle {
  margin-bottom: var(--spacing-4);
}

/* Passkey status message */
.passkey-status {
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  min-height: 1.5em;
  margin-top: var(--spacing-3);
}

.passkey-status.status-success {
  color: var(--color-success);
}

.passkey-status.status-error {
  color: var(--color-danger);
}

/* Passkey list in admin */
.passkey-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
  margin-bottom: var(--spacing-6);
}

.passkey-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-3) var(--spacing-4);
  background-color: var(--color-gray-50);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-md);
}

.passkey-info {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  color: var(--color-gray-600);
}

.passkey-info div {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.passkey-name {
  font-weight: 500;
  font-size: var(--font-size-sm);
  color: var(--color-gray-800);
}

.passkey-date {
  font-size: var(--font-size-xs);
  color: var(--color-gray-500);
}

.passkey-register {
  margin-top: var(--spacing-4);
}


/* --------------------------------------------------------------------------
   20. Utility Classes
   -------------------------------------------------------------------------- */
.text-center  { text-align: center; }
.text-right   { text-align: right; }
.text-muted   { color: var(--color-gray-500); }
.text-sm      { font-size: var(--font-size-sm); }
.text-xs      { font-size: var(--font-size-xs); }
.text-mono    { font-family: var(--font-mono); }
.font-bold    { font-weight: 700; }
.font-medium  { font-weight: 500; }

.mt-2  { margin-top: var(--spacing-2); }
.mt-4  { margin-top: var(--spacing-4); }
.mt-6  { margin-top: var(--spacing-6); }
.mt-8  { margin-top: var(--spacing-8); }
.mb-2  { margin-bottom: var(--spacing-2); }
.mb-4  { margin-bottom: var(--spacing-4); }
.mb-6  { margin-bottom: var(--spacing-6); }
.mb-8  { margin-bottom: var(--spacing-8); }

.flex          { display: flex; }
.flex-center   { display: flex; align-items: center; }
.flex-between  { display: flex; align-items: center; justify-content: space-between; }
.gap-2         { gap: var(--spacing-2); }
.gap-4         { gap: var(--spacing-4); }

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

.truncate {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.hidden {
  display: none !important;
}


/* --------------------------------------------------------------------------
   21. Animations
   -------------------------------------------------------------------------- */
@keyframes pulse {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.4;
    transform: scale(0.85);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: translateY(12px) scale(0.97);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

.animate-fade-in    { animation: fadeIn var(--transition-slow) ease-out; }
.animate-slide-down { animation: slideDown var(--transition-slow) ease-out; }
.animate-spin       { animation: spin 800ms linear infinite; }

/* Loading spinner */
.spinner {
  display: inline-block;
  width: 18px;
  height: 18px;
  border: 2px solid var(--color-gray-200);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 600ms linear infinite;
}

.spinner-sm {
  width: 14px;
  height: 14px;
  border-width: 1.5px;
}


/* --------------------------------------------------------------------------
   22. Responsive Design — Mobile-First (Samsung Fold 4 primary target)
   Fold 4 Cover: ~374px CSS width
   Fold 4 Unfolded: ~586px CSS width
   -------------------------------------------------------------------------- */

/* Base is already mobile-optimized. Adjustments for very narrow screens. */

/* Fold 4 Cover Screen (narrowest) */
@media (max-width: 400px) {
  :root {
    --container-padding: var(--spacing-3);
    --header-height: 48px;
  }

  .logo {
    font-size: var(--font-size-sm);
    gap: var(--spacing-2);
  }

  .logo svg {
    width: 22px;
    height: 22px;
  }

  .nav-link {
    padding: var(--spacing-1) var(--spacing-2);
    font-size: var(--font-size-xs);
  }

  .page-header {
    padding: var(--spacing-4) 0 var(--spacing-3);
  }

  .page-header h1 {
    font-size: var(--font-size-lg);
  }

  .link-card {
    padding: var(--spacing-3);
  }

  .link-name {
    font-size: var(--font-size-sm);
  }

  .status-badge {
    font-size: 0.65rem;
    padding: 2px var(--spacing-2);
  }

  .search-bar input {
    font-size: 16px; /* Prevent zoom on Samsung/Android */
    padding: var(--spacing-2) var(--spacing-3) var(--spacing-2) var(--spacing-10);
  }

  .settings-grid {
    grid-template-columns: 1fr;
  }

  .login-card {
    padding: var(--spacing-5);
    margin: var(--spacing-6) auto;
  }
}

/* Standard mobile — Fold 4 Unfolded + phones */
@media (max-width: 640px) {
  .search-bar input,
  .search-input {
    font-size: 16px; /* Prevent zoom */
  }

  /* Modal slides up from bottom on mobile */
  .modal.active {
    align-items: flex-end;
    padding: 0;
  }

  .modal-content {
    max-width: 100%;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    max-height: 90vh;
  }

  .modal-footer {
    flex-direction: column-reverse;
  }

  .modal-footer .btn {
    width: 100%;
  }

  .form-actions {
    flex-direction: column-reverse;
  }

  .form-actions .btn {
    width: 100%;
  }

  .admin-table th,
  .admin-table td {
    padding: var(--spacing-2) var(--spacing-3);
    font-size: var(--font-size-xs);
  }

  .td-url a {
    max-width: 180px;
    display: inline-block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    vertical-align: bottom;
  }

  .td-date {
    display: none;
  }

  .header-actions {
    gap: var(--spacing-2);
  }

  .btn-add svg {
    display: none;
  }
}

/* Desktop — wider layout for readability */
@media (min-width: 768px) {
  :root {
    --header-height: 60px;
    --container-padding: var(--spacing-6);
  }

  .link-card {
    padding: var(--spacing-4) var(--spacing-5);
  }

  .link-name {
    font-size: var(--font-size-base);
  }
}

/* Large screens */
@media (min-width: 1024px) {
  :root {
    --container-max: 720px;
  }
}


/* --------------------------------------------------------------------------
   23. Print Styles
   -------------------------------------------------------------------------- */
@media print {
  .main-header,
  .main-footer,
  .btn,
  .search-bar,
  .modal {
    display: none !important;
  }

  body {
    background: white;
    color: black;
    font-size: 12pt;
  }

  .link-card {
    box-shadow: none;
    border: 1px solid #ccc;
    break-inside: avoid;
  }

  .link-url {
    white-space: normal;
    overflow: visible;
  }

  a[href]::after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
    color: #666;
  }
}