/* ==========================================================================
   Konciv Meeting App — Design System
   Adapted from Redkon design system. Trimmed for Meeting App use.
   All pages import this file first.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CSS Custom Properties (Design Tokens)
   -------------------------------------------------------------------------- */
:root {
  /* --- Colors --- */
  --color-primary:       #32a6b4;
  --color-primary-hover: #2a8f9b;
  --color-primary-light: #e8f6f8;
  --color-dark:          #3D4953;
  --color-dark-hover:    #2e3740;
  --color-text:          #1a1a2e;
  --color-text-muted:    #6b7280;
  --color-text-light:    #9ca3af;
  --color-bg:            #f8fafc;
  --color-bg-alt:        #f1f5f9;
  --color-surface:       #ffffff;
  --color-border:        #e2e8f0;
  --color-border-light:  #f1f5f9;
  --color-success:       #10b981;
  --color-success-bg:    #ecfdf5;
  --color-danger:        #ef4444;
  --color-danger-bg:     #fef2f2;
  --color-warning:       #f59e0b;
  --color-warning-bg:    #fffbeb;
  --color-info:          #3b82f6;
  --color-info-bg:       #eff6ff;
  --color-accent:        #9cba60;

  /* --- Typography --- */
  --font-family:     'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs:    0.75rem;
  --font-size-sm:    0.8125rem;
  --font-size-base:  0.875rem;
  --font-size-md:    1rem;
  --font-size-lg:    1.125rem;
  --font-size-xl:    1.25rem;
  --font-size-2xl:   1.5rem;
  --font-weight-normal:  400;
  --font-weight-medium:  500;
  --font-weight-semi:    600;
  --font-weight-bold:    700;
  --line-height:         1.5;

  /* --- Spacing (4px base) --- */
  --space-0:   0;
  --space-1:   0.25rem;
  --space-2:   0.5rem;
  --space-3:   0.75rem;
  --space-4:   1rem;
  --space-5:   1.25rem;
  --space-6:   1.5rem;
  --space-8:   2rem;
  --space-10:  2.5rem;
  --space-12:  3rem;

  /* --- Shadows --- */
  --shadow-xs:  0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-sm:  0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md:  0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --shadow-lg:  0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
  --shadow-xl:  0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px -5px rgba(0, 0, 0, 0.03);

  /* --- Border radius --- */
  --radius-sm:   0.25rem;
  --radius-md:   0.375rem;
  --radius-lg:   0.5rem;
  --radius-xl:   0.75rem;
  --radius-2xl:  1rem;
  --radius-full: 9999px;

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

  /* --- Z-index layers --- */
  --z-dropdown:  100;
  --z-sticky:    200;
  --z-overlay:   300;
  --z-modal:     400;
  --z-toast:     1090;

  /* --- Layout --- */
  --navbar-height: 56px;
}

/* --------------------------------------------------------------------------
   2. Base Resets
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height);
  color: var(--color-text);
  background-color: var(--color-bg);
  margin: 0;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  touch-action: manipulation;
}

label, div, ul, li, input, button, textarea, select, a, table, th, td {
  font-size: inherit;
}

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

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

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

/* --------------------------------------------------------------------------
   3. Form Base Styles
   -------------------------------------------------------------------------- */
input,
select,
textarea,
.form-control,
.form-select,
.btn {
  font-family: inherit;
  font-size: var(--font-size-base);
  color: var(--color-text);
}

/* --------------------------------------------------------------------------
   4. Component Classes (k- prefix)
   -------------------------------------------------------------------------- */

/* --- Buttons --- */
.k-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-family: inherit;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  line-height: 1;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  text-decoration: none;
  min-height: 36px;
}

.k-btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.k-btn--primary {
  background-color: var(--color-primary);
  color: #fff;
}

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

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

.k-btn--secondary:hover {
  background-color: var(--color-border);
}

.k-btn--danger {
  background-color: var(--color-danger);
  color: #fff;
}

.k-btn--danger:hover {
  background-color: #dc2626;
  color: #fff;
}

.k-btn--ghost {
  background-color: transparent;
  color: var(--color-text-muted);
}

.k-btn--ghost:hover {
  background-color: var(--color-bg-alt);
  color: var(--color-text);
}

.k-btn--sm {
  padding: var(--space-1) var(--space-3);
  font-size: var(--font-size-sm);
  min-height: 30px;
}

.k-btn--lg {
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-md);
  min-height: 44px;
}

.k-btn--full {
  width: 100%;
}

/* --- Inputs --- */
.k-input {
  display: block;
  width: 100%;
  padding: var(--space-2) var(--space-3);
  font-family: inherit;
  font-size: var(--font-size-base);
  color: var(--color-text);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  min-height: 38px;
}

.k-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(50, 166, 180, 0.15);
}

.k-input::placeholder {
  color: var(--color-text-light);
}

textarea.k-input {
  min-height: 80px;
  resize: vertical;
}

select.k-input {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b7280' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

/* --- Labels --- */
.k-label {
  display: block;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semi);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-1);
}

/* --- Form Group --- */
.k-form-group {
  margin-bottom: var(--space-4);
}

/* --- Navbar --- */
.k-navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--navbar-height);
  padding: 0 var(--space-4);
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-xs);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
}

.k-navbar__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  cursor: pointer;
}

.k-navbar__logo img {
  height: 28px;
  width: auto;
  max-width: 120px;
  object-fit: contain;
}

.k-navbar__logo-text {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semi);
  color: var(--color-text);
  white-space: nowrap;
}

.k-navbar__actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* --- User Menu --- */
.k-user-menu {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.k-user-menu:hover {
  background-color: var(--color-bg-alt);
}

.k-user-menu__name {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
}

.k-user-menu__icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semi);
}

/* --- Dropdown Menu --- */
.k-dropdown {
  position: relative;
  display: inline-block;
}

.k-dropdown__menu {
  list-style: none;
  margin: 0;
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  min-width: 180px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-1) 0;
  z-index: var(--z-dropdown);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
}

.k-dropdown__menu--open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.k-dropdown__item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  width: 100%;
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background: none;
  border: none;
  text-align: left;
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.k-dropdown__item:hover {
  background-color: var(--color-bg-alt);
}

.k-dropdown__user-name {
  display: block;
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semi);
  color: var(--color-text);
}

.k-dropdown__divider {
  height: 1px;
  background-color: var(--color-border);
  margin: var(--space-1) 0;
}

/* --- Modals (Bootstrap override helpers) --- */
.k-modal .modal-content {
  border: none;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
}

.k-modal .modal-header {
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-4) var(--space-5);
}

.k-modal .modal-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semi);
  color: var(--color-text);
}

.k-modal .modal-body {
  padding: var(--space-5);
}

.k-modal .modal-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-3) var(--space-5);
  gap: var(--space-2);
}

/* --- Alerts --- */
.k-alert {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-base);
  margin-bottom: var(--space-4);
  animation: k-fade-in 0.2s ease;
}

.k-alert--success { background-color: var(--color-success-bg); color: #065f46; border: 1px solid #a7f3d0; }
.k-alert--danger  { background-color: var(--color-danger-bg);  color: #991b1b; border: 1px solid #fecaca; }
.k-alert--warning { background-color: var(--color-warning-bg); color: #92400e; border: 1px solid #fde68a; }
.k-alert--info    { background-color: var(--color-info-bg);    color: #1e40af; border: 1px solid #bfdbfe; }

.k-alert__close {
  margin-left: auto;
  background: none;
  border: none;
  font-size: var(--font-size-lg);
  cursor: pointer;
  opacity: 0.5;
  color: inherit;
  line-height: 1;
}

.k-alert__close:hover { opacity: 1; }

/* --- Toast Notifications --- */
.k-toast-container {
  position: fixed;
  top: var(--space-4);
  right: var(--space-4);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  max-width: 380px;
  pointer-events: none;
}

.k-toast {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-base);
  box-shadow: var(--shadow-lg);
  animation: k-slide-in-right 0.3s ease;
  pointer-events: auto;
}

.k-toast--exit {
  animation: k-slide-out-right 0.3s ease forwards;
}

.k-toast--success { background-color: var(--color-success-bg); color: #065f46; border: 1px solid #a7f3d0; }
.k-toast--danger  { background-color: var(--color-danger-bg);  color: #991b1b; border: 1px solid #fecaca; }
.k-toast--warning { background-color: var(--color-warning-bg); color: #92400e; border: 1px solid #fde68a; }
.k-toast--info    { background-color: var(--color-info-bg);    color: #1e40af; border: 1px solid #bfdbfe; }

.k-toast__message { flex: 1; }

.k-toast__close {
  background: none;
  border: none;
  font-size: var(--font-size-lg);
  cursor: pointer;
  opacity: 0.5;
  color: inherit;
  line-height: 1;
  padding: 0;
}

.k-toast__close:hover { opacity: 1; }

/* --- FAB (Floating Action Button) --- */
.k-fab {
  position: fixed;
  bottom: var(--space-8);
  right: var(--space-8);
  width: 48px;
  height: 48px;
  background-color: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  z-index: var(--z-dropdown);
  transition: background-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.k-fab:hover {
  background-color: var(--color-primary-hover);
  transform: scale(1.05);
  box-shadow: var(--shadow-xl);
}

.k-fab svg {
  width: 20px;
  height: 20px;
}

/* --- Tags / Badges --- */
.k-tag {
  display: inline-flex;
  align-items: center;
  padding: 2px var(--space-2);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-full);
  white-space: nowrap;
  line-height: 1.4;
}

.k-tag--primary { background-color: var(--color-primary-light); color: var(--color-primary); }
.k-tag--muted   { background-color: var(--color-bg-alt);        color: var(--color-text-muted); }

/* --- Loading / Spinner --- */
.k-spinner {
  display: inline-block;
  width: 24px;
  height: 24px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: k-spin 0.6s linear infinite;
}

.k-spinner--lg {
  width: 40px;
  height: 40px;
  border-width: 4px;
}

.k-loading-overlay {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: var(--space-8);
  color: var(--color-text-muted);
}

/* --- Skeleton loading --- */
.k-skeleton {
  background: linear-gradient(90deg, var(--color-bg-alt) 25%, var(--color-border-light) 50%, var(--color-bg-alt) 75%);
  background-size: 200% 100%;
  animation: k-skeleton-shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

.k-skeleton-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-3);
  margin-bottom: var(--space-2);
}

.k-skeleton-card__title { height: 16px; width: 70%; margin-bottom: var(--space-3); }
.k-skeleton-card__line  { height: 12px; margin-bottom: var(--space-2); }

/* --- Utility Classes --- */
.k-sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0;
  margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0;
}

.k-text-muted  { color: var(--color-text-muted); }
.k-text-center { text-align: center; }
.k-mt-2 { margin-top: var(--space-2); }
.k-mt-4 { margin-top: var(--space-4); }
.k-mb-0 { margin-bottom: 0; }
.k-mb-4 { margin-bottom: var(--space-4); }
.k-flex { display: flex; }
.k-flex-center { display: flex; align-items: center; justify-content: center; }
.k-gap-2 { gap: var(--space-2); }
.k-gap-4 { gap: var(--space-4); }

.k-page-wrap { margin-top: var(--space-3); }

/* --- Icon helpers --- */
.k-chevron { font-size: 10px; color: var(--color-text-muted); }

/* --- Bootstrap overrides --- */
.btn-secondary,
.btn-secondary:focus,
.btn-secondary:active,
.btn-secondary:hover {
  color: #fff;
}

/* --------------------------------------------------------------------------
   5. Animations
   -------------------------------------------------------------------------- */
@keyframes k-spin {
  to { transform: rotate(360deg); }
}

@keyframes k-fade-in {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes k-slide-in-right {
  from { opacity: 0; transform: translateX(100%); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes k-slide-out-right {
  from { opacity: 1; transform: translateX(0); }
  to   { opacity: 0; transform: translateX(100%); }
}

@keyframes k-skeleton-shimmer {
  0%   { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.k-page-enter {
  animation: k-fade-in 0.3s ease;
}

/* --- PWA Install Banner --- */
.k-pwa-banner {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  box-shadow: 0 -4px 12px rgba(0,0,0,0.08);
  z-index: var(--z-toast);
  animation: k-slide-up 0.3s ease;
}

@keyframes k-slide-up {
  from { transform: translateY(100%); }
  to   { transform: translateY(0); }
}

/* --------------------------------------------------------------------------
   6. Responsive Overrides
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
  :root {
    --font-size-xs:    0.6875rem;
    --font-size-sm:    0.75rem;
    --font-size-base:  0.8125rem;
    --font-size-md:    0.875rem;
    --font-size-lg:    1rem;
    --space-4:   0.75rem;
    --space-5:   1rem;
    --navbar-height: 48px;
  }

  .k-fab {
    bottom: var(--space-5);
    right: var(--space-5);
    width: 44px;
    height: 44px;
  }

  .k-navbar {
    padding: 0 var(--space-2);
    gap: var(--space-1);
  }

  .k-navbar__logo { gap: var(--space-2); }
  .k-navbar__logo img { height: 24px; max-width: 80px; }
  .k-navbar__logo-text {
    font-size: var(--font-size-base);
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
  }
  .k-user-menu { gap: var(--space-1); padding: var(--space-1); }
  .k-user-menu__name { display: none; }
  .k-user-menu__icon { width: 28px; height: 28px; font-size: var(--font-size-xs); }
  .k-user-menu .fa-chevron-down { display: none; }

  .k-toast-container {
    top: var(--space-2);
    right: var(--space-2);
    left: var(--space-2);
    max-width: none;
  }
}

/* --------------------------------------------------------------------------
   7. Settings Modal
   -------------------------------------------------------------------------- */
.k-settings-section {
  padding: var(--space-2) 0;
}

.k-settings-section__title {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semi);
  margin-bottom: var(--space-2);
  color: var(--color-text);
}

.k-settings-section__desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

.k-settings-status {
  margin-top: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
}

.k-settings-status--info {
  background-color: var(--color-info-bg);
  color: var(--color-info);
}

.k-settings-status--success {
  background-color: var(--color-success-bg);
  color: var(--color-success);
}

.k-settings-status--error {
  background-color: var(--color-danger-bg);
  color: var(--color-danger);
}

/* --------------------------------------------------------------------------
   8. Timepicker Overrides
   -------------------------------------------------------------------------- */
.ui-timepicker-container {
  z-index: 1100 !important;
}

.ui-timepicker-wrapper {
  max-height: 200px;
  overflow-y: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  background: var(--color-surface);
}

.ui-timepicker-list li {
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-sm);
  font-family: var(--font-family);
  cursor: pointer;
}

.ui-timepicker-list li:hover,
.ui-timepicker-list .ui-timepicker-selected {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
}

/* --------------------------------------------------------------------------
   9. Print Styles
   -------------------------------------------------------------------------- */
@media print {
  .k-fab, .k-navbar, .k-toast-container { display: none; }
  body { background: white; color: black; }
}