/* =====================================================================
   Chat Platform — Core UI
   ===================================================================== */

*, *::before, *::after { box-sizing: border-box; }

html, body { height: 100%; }

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.65;
  color: var(--text-color);
  background: var(--bg-color);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--trans), color var(--trans);
}

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

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

h1, h2, h3, h4, h5, h6 {
  color: var(--text-strong);
  font-weight: 700;
  line-height: 1.3;
  margin: 0 0 .5em;
}
h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }

p { margin: 0 0 1em; }

::selection { background: var(--primary-soft); color: var(--text-strong); }

/* Scrollbar */
* { scrollbar-width: thin; scrollbar-color: var(--border-strong) transparent; }
*::-webkit-scrollbar { width: 8px; height: 8px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb {
  background: var(--border-strong);
  border-radius: var(--radius-pill);
}
*::-webkit-scrollbar-thumb:hover { background: var(--muted-color); }

/* Focus */
:focus-visible {
  outline: none;
  box-shadow: var(--ring);
  border-radius: var(--radius-sm);
}

/* =====================================================================
   Layout Helpers
   ===================================================================== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-5);
}
.flex   { display: flex; }
.inline-flex { display: inline-flex; }
.grid   { display: grid; }
.items-center { align-items: center; }
.items-start  { align-items: flex-start; }
.justify-between { justify-content: space-between; }
.justify-center  { justify-content: center; }
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-5 { gap: var(--space-5); }
.gap-6 { gap: var(--space-6); }
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.text-center { text-align: center; }
.text-muted  { color: var(--muted-color); }
.text-sm     { font-size: .875rem; }
.text-xs     { font-size: .78rem; }
.w-full      { width: 100%; }
.hidden      { display: none !important; }
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* =====================================================================
   Buttons
   ===================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 10px 18px;
  font-family: inherit;
  font-size: .95rem;
  font-weight: 600;
  line-height: 1.2;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  user-select: none;
  transition: transform var(--trans-fast), background var(--trans),
              color var(--trans), border-color var(--trans),
              box-shadow var(--trans);
  text-decoration: none;
}
.btn:active { transform: translateY(1px) scale(.99); }
.btn:disabled,
.btn[disabled] { opacity: .55; cursor: not-allowed; pointer-events: none; }

.btn-primary {
  background: var(--primary-color);
  color: var(--primary-text);
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover { background: var(--primary-hover); color: var(--primary-text); }

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

.btn-ghost {
  background: transparent;
  color: var(--text-color);
  border-color: var(--border-color);
}
.btn-ghost:hover {
  background: var(--card-hover);
  border-color: var(--border-strong);
}

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

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

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

.btn-sm { padding: 6px 12px; font-size: .85rem; border-radius: var(--radius-sm); }
.btn-lg { padding: 13px 26px; font-size: 1.02rem; border-radius: var(--radius-lg); }
.btn-block { width: 100%; }

.btn-icon {
  width: 40px; height: 40px; padding: 0;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--text-color);
  border: 1px solid transparent;
}
.btn-icon:hover { background: var(--card-hover); color: var(--primary-color); }

/* Loading state on buttons */
.btn.is-loading {
  color: transparent !important;
  pointer-events: none;
  position: relative;
}
.btn.is-loading::after {
  content: "";
  position: absolute;
  inset: 0;
  margin: auto;
  width: 18px; height: 18px;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  color: #fff;
  animation: spin .7s linear infinite;
}
.btn-ghost.is-loading::after,
.btn-soft.is-loading::after { color: var(--primary-color); }

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

/* =====================================================================
   Forms
   ===================================================================== */
.field { margin-bottom: var(--space-4); }

.field label,
.label {
  display: block;
  margin-bottom: 6px;
  font-size: .88rem;
  font-weight: 600;
  color: var(--text-color);
}
.field label .req,
.label .req { color: var(--danger-color); margin-inline-start: 3px; }

.input,
.textarea,
.select {
  width: 100%;
  padding: 11px 14px;
  font-family: inherit;
  font-size: .95rem;
  color: var(--text-color);
  background: var(--input-bg);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: border-color var(--trans), box-shadow var(--trans),
              background var(--trans);
}
.input:hover,
.textarea:hover,
.select:hover { border-color: var(--border-strong); }
.input:focus,
.textarea:focus,
.select:focus {
  outline: none;
  border-color: var(--primary-color);
  background: var(--input-bg-focus);
  box-shadow: var(--ring);
}
.input::placeholder,
.textarea::placeholder { color: var(--muted-2); }

.textarea { resize: vertical; min-height: 100px; line-height: 1.6; }

.input-group { position: relative; }
.input-group .input { padding-inline-end: 46px; }
.input-group .input-group-btn {
  position: absolute;
  inset-inline-end: 6px;
  inset-block-start: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: 0;
  padding: 6px;
  cursor: pointer;
  color: var(--muted-color);
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.input-group .input-group-btn:hover { color: var(--primary-color); background: var(--card-hover); }

.form-hint { display: block; margin-top: 6px; font-size: .8rem; color: var(--muted-color); }
.form-error { display: block; margin-top: 6px; font-size: .82rem; color: var(--danger-color); font-weight: 500; }

.input.has-error,
.textarea.has-error,
.select.has-error { border-color: var(--danger-color); }
.input.is-valid { border-color: var(--success-color); }

/* Checkbox / Radio */
.check {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  user-select: none;
  font-size: .9rem;
  color: var(--text-color);
}
.check input[type="checkbox"],
.check input[type="radio"] {
  appearance: none;
  width: 18px; height: 18px;
  border: 1.5px solid var(--border-strong);
  border-radius: 5px;
  background: var(--input-bg);
  cursor: pointer;
  position: relative;
  transition: var(--trans-fast);
  flex-shrink: 0;
}
.check input[type="radio"] { border-radius: 50%; }
.check input[type="checkbox"]:checked,
.check input[type="radio"]:checked {
  background: var(--primary-color);
  border-color: var(--primary-color);
}
.check input[type="checkbox"]:checked::after {
  content: "";
  position: absolute;
  inset: 0;
  margin: auto;
  width: 5px; height: 9px;
  border: 2px solid #fff;
  border-top: 0; border-left: 0;
  transform: rotate(45deg) translate(-1px, -1px);
}
.check input[type="radio"]:checked::after {
  content: "";
  position: absolute;
  inset: 0;
  margin: auto;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #fff;
}

/* Password strength */
.pw-strength { margin-top: 8px; }
.pw-strength-bar {
  height: 5px;
  background: var(--divider);
  border-radius: var(--radius-pill);
  overflow: hidden;
}
.pw-strength-fill {
  height: 100%;
  width: 0;
  background: var(--danger-color);
  transition: width var(--trans), background var(--trans);
}
.pw-strength-label {
  display: flex;
  justify-content: space-between;
  font-size: .78rem;
  color: var(--muted-color);
  margin-top: 4px;
}

/* =====================================================================
   Cards
   ===================================================================== */
.card {
  background: var(--card-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--trans), border-color var(--trans);
}
.card-hover:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--border-strong);
}
.card-header {
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--divider);
  margin-bottom: var(--space-5);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}
.card-title { margin: 0; font-size: 1.15rem; font-weight: 700; }
.card-sub   { color: var(--muted-color); font-size: .88rem; margin: 4px 0 0; }

/* =====================================================================
   Alerts
   ===================================================================== */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  font-size: .9rem;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: var(--space-4);
  line-height: 1.55;
}
.alert-icon { flex-shrink: 0; font-size: 1.1rem; line-height: 1.4; }
.alert-success { background: var(--success-soft); color: var(--success-color); border-color: color-mix(in srgb, var(--success-color) 25%, transparent); }
.alert-danger  { background: var(--danger-soft);  color: var(--danger-color);  border-color: color-mix(in srgb, var(--danger-color) 25%, transparent); }
.alert-warning { background: var(--warning-soft); color: var(--warning-color); border-color: color-mix(in srgb, var(--warning-color) 25%, transparent); }
.alert-info    { background: var(--info-soft);    color: var(--info-color);    border-color: color-mix(in srgb, var(--info-color) 25%, transparent); }

/* =====================================================================
   Badges
   ===================================================================== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  font-size: .74rem;
  font-weight: 700;
  border-radius: var(--radius-pill);
  background: var(--primary-soft);
  color: var(--primary-color);
  line-height: 1.5;
}
.badge-success { background: var(--success-soft); color: var(--success-color); }
.badge-danger  { background: var(--danger-soft);  color: var(--danger-color); }
.badge-warning { background: var(--warning-soft); color: var(--warning-color); }
.badge-info    { background: var(--info-soft);    color: var(--info-color); }
.badge-muted   { background: var(--divider);      color: var(--muted-color); }

/* =====================================================================
   Avatars
   ===================================================================== */
.avatar {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  overflow: hidden;
  background: var(--primary-soft);
  color: var(--primary-color);
  font-weight: 700;
  flex-shrink: 0;
  user-select: none;
}
.avatar img { width: 100%; height: 100%; object-fit: cover; }
.avatar-xs { width: 28px; height: 28px; font-size: .8rem; }
.avatar-sm { width: 36px; height: 36px; font-size: 1rem; }
.avatar-md { width: 46px; height: 46px; font-size: 1.15rem; }
.avatar-lg { width: 64px; height: 64px; font-size: 1.5rem; }
.avatar-xl { width: 96px; height: 96px; font-size: 2rem; }

.avatar-status {
  position: absolute;
  inset-block-end: 0;
  inset-inline-end: 0;
  width: 26%;
  height: 26%;
  min-width: 10px;
  min-height: 10px;
  border-radius: 50%;
  border: 2.5px solid var(--card-color);
  background: var(--offline-color);
}
.avatar-status.online  { background: var(--online-color); }
.avatar-status.away    { background: var(--away-color); }
.avatar-status.offline { background: var(--offline-color); }

/* =====================================================================
   Toast
   ===================================================================== */
.toast-region {
  position: fixed;
  inset-block-start: 20px;
  inset-inline-start: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-width: min(92vw, 380px);
  pointer-events: none;
}
.toast {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  background: var(--card-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  color: var(--text-color);
  font-size: .92rem;
  line-height: 1.5;
  pointer-events: auto;
  animation: toast-in .28s cubic-bezier(.2,.8,.2,1);
  position: relative;
  overflow: hidden;
  border-inline-start: 4px solid var(--primary-color);
}
.toast.is-leaving { animation: toast-out .22s ease forwards; }

.toast-icon { font-size: 1.15rem; flex-shrink: 0; line-height: 1.4; }
.toast-body { flex: 1; min-width: 0; }
.toast-title { font-weight: 700; font-size: .92rem; margin: 0 0 2px; }
.toast-msg   { margin: 0; color: var(--muted-color); font-size: .87rem; word-wrap: break-word; }
.toast-close {
  background: transparent; border: 0; cursor: pointer;
  color: var(--muted-color); padding: 2px; border-radius: 6px;
  display: inline-flex; align-items: center; justify-content: center;
}
.toast-close:hover { color: var(--danger-color); background: var(--card-hover); }

.toast-success { border-inline-start-color: var(--success-color); }
.toast-success .toast-icon { color: var(--success-color); }
.toast-error   { border-inline-start-color: var(--danger-color); }
.toast-error   .toast-icon { color: var(--danger-color); }
.toast-warning { border-inline-start-color: var(--warning-color); }
.toast-warning .toast-icon { color: var(--warning-color); }
.toast-info    { border-inline-start-color: var(--info-color); }
.toast-info    .toast-icon { color: var(--info-color); }

@keyframes toast-in {
  from { opacity: 0; transform: translateY(-12px) scale(.96); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
@keyframes toast-out {
  to { opacity: 0; transform: translateX(-20px) scale(.96); }
}

/* =====================================================================
   Modal
   ===================================================================== */
.modal {
  position: fixed;
  inset: 0;
  z-index: 9000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  background: var(--overlay-bg);
  backdrop-filter: blur(4px);
  animation: fade-in .2s ease;
}
.modal.is-open { display: flex; }
.modal-dialog {
  background: var(--card-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  width: 100%;
  max-width: 520px;
  max-height: 92vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  animation: modal-in .28s cubic-bezier(.2,.8,.2,1);
}
.modal-header {
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--divider);
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--space-3);
}
.modal-title { margin: 0; font-size: 1.05rem; font-weight: 700; }
.modal-body  { padding: var(--space-5); overflow-y: auto; }
.modal-footer {
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--divider);
  display: flex; justify-content: flex-end; gap: var(--space-2);
  background: var(--card-color);
}

@keyframes fade-in { from { opacity: 0; } to { opacity: 1; } }
@keyframes modal-in {
  from { opacity: 0; transform: translateY(12px) scale(.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* =====================================================================
   Dropdown
   ===================================================================== */
.dropdown { position: relative; display: inline-block; }
.dropdown-menu {
  position: absolute;
  inset-block-start: calc(100% + 6px);
  inset-inline-end: 0;
  min-width: 210px;
  background: var(--card-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 6px;
  z-index: 500;
  display: none;
  animation: modal-in .18s cubic-bezier(.2,.8,.2,1);
}
.dropdown-menu.is-open { display: block; }
.dropdown-item {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-color);
  font-size: .9rem;
  cursor: pointer;
  border: 0; background: transparent; width: 100%;
  text-align: start;
  font-family: inherit;
  transition: background var(--trans-fast);
}
.dropdown-item:hover { background: var(--card-hover); color: var(--primary-color); }
.dropdown-item.danger { color: var(--danger-color); }
.dropdown-item.danger:hover { background: var(--danger-soft); color: var(--danger-color); }
.dropdown-divider { height: 1px; background: var(--divider); margin: 4px 0; }

/* =====================================================================
   Skeleton
   ===================================================================== */
.skeleton {
  background: linear-gradient(90deg,
              var(--divider) 0%,
              var(--border-color) 50%,
              var(--divider) 100%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.4s ease-in-out infinite;
  border-radius: var(--radius-sm);
  color: transparent !important;
  user-select: none;
}
.skeleton-text { height: 14px; margin-bottom: 8px; }
.skeleton-title { height: 22px; width: 40%; margin-bottom: 12px; }
.skeleton-avatar { width: 46px; height: 46px; border-radius: 50%; }
@keyframes skeleton-loading {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* =====================================================================
   Empty State
   ===================================================================== */
.empty-state {
  text-align: center;
  padding: var(--space-8) var(--space-4);
  color: var(--muted-color);
}
.empty-state .empty-icon {
  font-size: 2.6rem; margin-bottom: var(--space-3); opacity: .8;
}
.empty-state h3 { color: var(--text-color); margin-bottom: 6px; font-size: 1.1rem; }
.empty-state p  { margin: 0 0 var(--space-4); font-size: .9rem; }

/* =====================================================================
   Theme Toggle Button
   ===================================================================== */
.theme-toggle {
  width: 42px; height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: var(--card-color);
  color: var(--text-color);
  cursor: pointer;
  transition: var(--trans);
  position: relative;
  overflow: hidden;
}
.theme-toggle:hover {
  color: var(--primary-color);
  border-color: var(--primary-color);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}
.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
  position: absolute;
  transition: transform .35s cubic-bezier(.2,.8,.2,1), opacity .25s ease;
}
.theme-toggle .icon-sun  { transform: translateY(0)     rotate(0deg);   opacity: 1; }
.theme-toggle .icon-moon { transform: translateY(24px)  rotate(-90deg); opacity: 0; }
[data-theme="dark"] .theme-toggle .icon-sun  { transform: translateY(-24px) rotate(90deg);  opacity: 0; }
[data-theme="dark"] .theme-toggle .icon-moon { transform: translateY(0)     rotate(0deg);   opacity: 1; }

/* =====================================================================
   Auth Layout
   ===================================================================== */
.auth-wrap {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  background: var(--bg-color);
}

.auth-visual {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 20% 15%, rgba(124, 58, 237, .35), transparent 45%),
    radial-gradient(circle at 80% 80%, rgba(37, 99, 235, .40), transparent 50%),
    linear-gradient(135deg, #1e3a8a, #4c1d95);
  color: #fff;
  padding: var(--space-10);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.auth-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(rgba(255,255,255,.08) 1px, transparent 1px);
  background-size: 22px 22px;
  opacity: .7;
  pointer-events: none;
}
.auth-visual h2 { color: #fff; font-size: 2rem; position: relative; }
.auth-visual p  { color: rgba(255,255,255,.85); position: relative; }
.auth-visual .brand { display: inline-flex; align-items: center; gap: 10px; color: #fff; font-weight: 800; font-size: 1.3rem; position: relative; }
.auth-visual .brand .brand-mark {
  width: 40px; height: 40px;
  display: inline-flex; align-items: center; justify-content: center;
  background: rgba(255,255,255,.16);
  border-radius: 12px;
  backdrop-filter: blur(6px);
}
.auth-features {
  display: grid; gap: var(--space-3);
  position: relative;
  margin-top: var(--space-6);
}
.auth-features .item {
  display: flex; align-items: center; gap: 10px;
  color: rgba(255,255,255,.92);
  font-size: .95rem;
}
.auth-features .item svg { flex-shrink: 0; }

.auth-main {
  padding: var(--space-6) var(--space-5);
  display: flex;
  flex-direction: column;
  background: var(--bg-elevated);
  position: relative;
}
.auth-main .auth-topbar {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: var(--space-6);
}
.auth-main .auth-topbar .brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; color: var(--text-strong); }
.auth-main .auth-topbar .brand .brand-mark {
  width: 36px; height: 36px;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--primary-color);
  color: #fff; border-radius: 10px;
}
.auth-card {
  width: 100%;
  max-width: 460px;
  margin: auto;
  background: transparent;
  padding: var(--space-4) 0;
}
.auth-card h1 { font-size: 1.75rem; margin-bottom: 6px; }
.auth-card .auth-lead { color: var(--muted-color); margin-bottom: var(--space-6); font-size: .95rem; }
.auth-footer {
  margin-top: var(--space-6);
  text-align: center;
  color: var(--muted-color);
  font-size: .9rem;
}

.divider-or {
  display: flex; align-items: center; gap: 12px;
  color: var(--muted-color); font-size: .82rem;
  margin: var(--space-5) 0;
}
.divider-or::before, .divider-or::after {
  content: ""; height: 1px; flex: 1; background: var(--border-color);
}

/* Avatar upload */
.avatar-picker {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}
.avatar-picker .avatar-preview {
  width: 88px; height: 88px;
  border-radius: 50%;
  overflow: hidden;
  background: var(--primary-soft);
  display: flex; align-items: center; justify-content: center;
  color: var(--primary-color);
  font-size: 2rem;
  font-weight: 700;
  border: 2px solid var(--border-color);
  flex-shrink: 0;
}
.avatar-picker .avatar-preview img { width: 100%; height: 100%; object-fit: cover; }
.avatar-picker .actions { display: flex; flex-direction: column; gap: 6px; }
.avatar-picker .actions .btn { align-self: flex-start; }

/* Simple page header (for profile / settings) */
.page-header {
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-5) 0;
  margin-bottom: var(--space-5);
  border-bottom: 1px solid var(--divider);
  flex-wrap: wrap;
}
.page-header h1 { margin: 0; font-size: 1.5rem; }
.page-header .actions { display: flex; gap: var(--space-2); }

/* Topbar (used by profile / settings / chat later) */
.topbar {
  position: sticky; top: 0; z-index: 100;
  height: var(--header-h);
  display: flex; align-items: center;
  gap: var(--space-4);
  padding-inline: var(--space-5);
  background: var(--header-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
}
.topbar .brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; color: var(--text-strong); }
.topbar .brand .brand-mark {
  width: 36px; height: 36px;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--primary-color); color: #fff; border-radius: 10px;
}
.topbar .spacer { flex: 1; }
.topbar .nav { display: flex; gap: 4px; }
.topbar .nav a {
  padding: 8px 14px;
  border-radius: var(--radius-md);
  color: var(--text-color);
  font-weight: 600;
  font-size: .92rem;
  transition: background var(--trans-fast), color var(--trans-fast);
}
.topbar .nav a:hover { background: var(--card-hover); color: var(--primary-color); }
.topbar .nav a.active { background: var(--primary-soft); color: var(--primary-color); }

/* Tabs */
.tabs {
  display: flex; gap: 4px;
  border-bottom: 1px solid var(--divider);
  margin-bottom: var(--space-5);
  overflow-x: auto;
  scrollbar-width: none;
}
.tabs::-webkit-scrollbar { display: none; }
.tab {
  padding: 10px 18px;
  border: 0;
  background: transparent;
  color: var(--muted-color);
  font-family: inherit;
  font-size: .92rem;
  font-weight: 600;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: color var(--trans), border-color var(--trans);
  white-space: nowrap;
}
.tab:hover { color: var(--text-color); }
.tab.active { color: var(--primary-color); border-bottom-color: var(--primary-color); }

/* =====================================================================
   Responsive
   ===================================================================== */
@media (max-width: 1024px) {
  .auth-wrap { grid-template-columns: 1fr; }
  .auth-visual { display: none; }
  .auth-main { min-height: 100vh; }
}

@media (max-width: 640px) {
  .container { padding-inline: var(--space-4); }
  .card { padding: var(--space-5); border-radius: var(--radius-md); }
  .auth-card h1 { font-size: 1.5rem; }
  .page-header { flex-direction: column; align-items: flex-start; }
  .modal-dialog { border-radius: var(--radius-md); }
  .toast-region { inset-inline: 12px; max-width: none; }
}

/* =====================================================================
   Notifications Bell + Panel
   ===================================================================== */
.notif-wrap { position: relative; display: inline-block; }

.notif-bell {
  position: relative;
  width: 42px; height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: var(--card-color);
  color: var(--text-color);
  cursor: pointer;
  transition: var(--trans);
}
.notif-bell:hover {
  color: var(--primary-color);
  border-color: var(--primary-color);
}
.notif-bell.has-notifications { color: var(--primary-color); }
.notif-bell.has-notifications svg { animation: bell-shake 2.4s ease-in-out infinite; }

@keyframes bell-shake {
  0%, 90%, 100% { transform: rotate(0deg); }
  92%, 96% { transform: rotate(-12deg); }
  94%, 98% { transform: rotate(12deg); }
}

.notif-badge {
  position: absolute;
  inset-block-start: -3px;
  inset-inline-end: -3px;
  min-width: 19px;
  height: 19px;
  padding: 0 5px;
  background: var(--danger-color);
  color: #fff;
  font-size: .68rem;
  font-weight: 700;
  border-radius: var(--radius-pill);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--card-color);
  animation: badge-pop .3s ease;
}
@keyframes badge-pop {
  from { transform: scale(0); }
  to   { transform: scale(1); }
}

.notif-panel {
  position: absolute;
  inset-block-start: calc(100% + 8px);
  inset-inline-end: 0;
  width: min(92vw, 380px);
  max-height: 480px;
  background: var(--card-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  display: none;
  flex-direction: column;
  overflow: hidden;
  z-index: 600;
  animation: modal-in .2s cubic-bezier(.2,.8,.2,1);
}
.notif-panel.is-open { display: flex; }

.notif-header {
  padding: 12px 16px;
  border-bottom: 1px solid var(--divider);
  display: flex; align-items: center; justify-content: space-between;
}
.notif-header h4 { margin: 0; font-size: 1rem; }
.notif-header button {
  background: transparent; border: 0;
  color: var(--primary-color); font-size: .82rem;
  font-family: inherit; cursor: pointer;
  padding: 4px 8px; border-radius: var(--radius-sm);
}
.notif-header button:hover { background: var(--card-hover); }

.notif-body {
  flex: 1;
  overflow-y: auto;
  max-height: 400px;
}

.notif-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 10px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--divider);
  cursor: pointer;
  transition: background var(--trans-fast);
  align-items: flex-start;
  position: relative;
}
.notif-item:hover { background: var(--card-hover); }
.notif-item.unread { background: var(--primary-soft); }
.notif-item.unread::before {
  content: "";
  position: absolute;
  inset-inline-start: 0;
  inset-block: 14px;
  width: 3px;
  background: var(--primary-color);
  border-radius: 0 4px 4px 0;
}

.notif-avatar {
  width: 40px; height: 40px;
  border-radius: 50%;
  overflow: hidden;
  background: var(--primary-soft);
  color: var(--primary-color);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  flex-shrink: 0;
}
.notif-avatar img { width: 100%; height: 100%; object-fit: cover; }

.notif-body-content { min-width: 0; }
.notif-title {
  font-weight: 600;
  font-size: .9rem;
  color: var(--text-strong);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
}
.notif-time { font-size: .72rem; color: var(--muted-color); font-weight: 400; flex-shrink: 0; }
.notif-text {
  font-size: .83rem;
  color: var(--muted-color);
  margin-top: 2px;
  line-height: 1.5;
  word-wrap: break-word;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.notif-del {
  background: transparent; border: 0;
  color: var(--muted-2); cursor: pointer;
  padding: 4px; border-radius: var(--radius-sm);
  align-self: flex-start;
  opacity: 0;
  transition: opacity var(--trans-fast), color var(--trans-fast);
}
.notif-item:hover .notif-del { opacity: 1; }
.notif-del:hover { color: var(--danger-color); background: var(--danger-soft); }

.notif-empty {
  padding: 40px 20px;
  text-align: center;
  color: var(--muted-color);
}
.notif-empty .empty-icon { font-size: 2.4rem; margin-bottom: 10px; opacity: .7; }

.notif-footer {
  padding: 10px 14px;
  border-top: 1px solid var(--divider);
  text-align: center;
}
.notif-footer a {
  color: var(--primary-color);
  font-size: .85rem;
  font-weight: 600;
}

/* =====================================================================
   Skip Link (A11y) — يظهر فقط عند التركيز بالكيبورد
   ===================================================================== */
.skip-link {
  position: absolute !important;
  inset-block-start: -120px !important;
  inset-inline-start: 12px !important;
  padding: 10px 16px !important;
  background: var(--primary-color) !important;
  color: #fff !important;
  border-radius: var(--radius-md) !important;
  z-index: 99999 !important;
  font-weight: 700 !important;
  text-decoration: none !important;
  font-size: .9rem !important;
  transition: inset-block-start 0.2s ease !important;
  box-shadow: var(--shadow-lg);
  pointer-events: none;
}

.skip-link:focus,
.skip-link:focus-visible {
  inset-block-start: 12px !important;
  color: #fff !important;
  pointer-events: auto;
  outline: 2px solid #fff;
  outline-offset: 2px;
}