/* =====================================================
   Tanglaw - PRO UI (Phase C)
   Apple-minimal, big-company polish layer.

   This is an override stylesheet.
   It should be linked AFTER global.css/layout.css/role css.
   ===================================================== */

:root{
  /* Typography: Apple-like system stack */
  --font-sans: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
               "Segoe UI", Roboto, Helvetica, Arial,
               "Apple Color Emoji", "Segoe UI Emoji";

  /* Subtle polish tokens */
  --pro-radius: 14px;
  --pro-radius-lg: 18px;
  --pro-border: rgba(255,255,255,0.08);
  --pro-border-strong: rgba(255,255,255,0.12);
  --pro-shadow-sm: 0 1px 2px rgba(0,0,0,0.25);
  --pro-shadow-md: 0 10px 30px rgba(0,0,0,0.35);
  --pro-shadow-lg: 0 18px 55px rgba(0,0,0,0.45);

  /* Gentle motion */
  --pro-ease: cubic-bezier(0.2, 0.8, 0.2, 1);
  --pro-dur: 180ms;

  /* Extra motion + polish (Phase E) */
  --pro-dur-fast: 140ms;
  --pro-dur-slow: 260ms;
  --pro-soft-glow: 0 0 0 4px color-mix(in srgb, var(--primary) 14%, transparent);
}

html, body{
  font-family: var(--font-sans) !important;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Remove heavy background glow for a cleaner, "Apple minimal" look */
body{
  background: var(--bg-main) !important;
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce){
  *, *::before, *::after{
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* Subtle, premium motion defaults */
.card, .widget, .panel, .admin-card, .conversation-item, .user-item, .student-item{
  transition: transform var(--pro-dur) var(--pro-ease), box-shadow var(--pro-dur) var(--pro-ease), border-color var(--pro-dur) var(--pro-ease), background var(--pro-dur) var(--pro-ease);
}

.card:hover, .widget:hover, .panel:hover, .admin-card:hover{
  transform: translateY(-1px);
  box-shadow: var(--pro-shadow-md);
}

/* Buttons feel more "native" */
button, .btn, .btn-primary, .btn-secondary, .btn-small, .res-btn{
  transition: transform var(--pro-dur-fast) var(--pro-ease), box-shadow var(--pro-dur-fast) var(--pro-ease), background var(--pro-dur-fast) var(--pro-ease), border-color var(--pro-dur-fast) var(--pro-ease);
}

button:active, .btn:active, .btn-primary:active, .btn-secondary:active, .btn-small:active{
  transform: translateY(1px);
}

/* Make focus rings cleaner */
:focus-visible{
  box-shadow: 0 0 0 3px var(--ring) !important;
}

/* ------------------------------------------------------------------
   Topbar
   ------------------------------------------------------------------ */
.topbar{
  height: 64px;
  padding: 0 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(15, 23, 42, 0.82);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--pro-border);
}

.topbar .logo{
  font-weight: 650;
  letter-spacing: 0.2px;
}

/* Brand */
.topbar .brand{
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text-main);
  text-decoration: none;
  font-weight: 650;
  letter-spacing: 0.2px;
}

.topbar .brand-mark{
  height: 38px;
  width: auto;
  display: block;
}

.topbar .brand-name{
  font-weight: 650;
  font-size: 18px;
  line-height: 1;
}

.topbar .brand-badge{
  font-size: 12px;
  line-height: 1;
  padding: 5px 10px;
  border-radius: 999px;
  border: 1px solid var(--pro-border);
  background: rgba(255,255,255,0.03);
  color: var(--text-muted);
}

@media (max-width: 520px){
  /* On mobile, keep the brand visible (logo + Tanglaw), hide only role badge to reduce clutter */
  .topbar .brand-name{display:inline; font-size: 16px;}
  .topbar .brand-badge{display:none;}
  .topbar .brand{gap: 10px;}
  .topbar .brand-mark{height: 34px;}
}

.topnav a{
  padding: 10px 12px;
  border-radius: 999px;
  color: var(--text-muted);
  text-decoration: none;
  transition: background var(--pro-dur) var(--pro-ease), color var(--pro-dur) var(--pro-ease);
}

.topnav a:hover{
  background: rgba(255,255,255,0.04);
  color: var(--text-main);
}

.topnav a.active{
  background: rgba(59,130,246,0.16);
  color: var(--text-main);
}

/* ------------------------------------------------------------------
   Sidebar + main layout
   ------------------------------------------------------------------ */
.layout{
  min-height: calc(100vh - 64px);
}

.sidebar{
  background: rgba(15, 23, 42, 0.92);
  border-right: 1px solid var(--pro-border);
}

.sidebar-nav a{
  border-radius: 12px;
  padding: 10px 12px;
  margin: 2px 8px;
  transition: background var(--pro-dur) var(--pro-ease), color var(--pro-dur) var(--pro-ease);
}

.sidebar-nav a:hover{
  background: rgba(255,255,255,0.04);
}

.sidebar-nav a.active{
  background: rgba(59,130,246,0.16);
  color: var(--text-main);
}

.main-content{
  padding: 24px;
}

/* ------------------------------------------------------------------
   Page headers
   ------------------------------------------------------------------ */
.page-header{
  margin: 8px 0 18px;
  padding: 16px 18px;
  border: 1px solid var(--pro-border);
  border-radius: var(--pro-radius);
  background: rgba(255,255,255,0.02);
  box-shadow: var(--pro-shadow-sm);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.page-header .page-header__text{min-width: 0;}

.page-header .page-header__actions{
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.page-header h1{
  font-size: 22px;
  margin-bottom: 6px;
}

.page-header p{
  color: var(--text-muted);
}

/* ------------------------------------------------------------------
   Toolbars (Phase D)
   ------------------------------------------------------------------ */
.tlw-toolbar,
.admin-controls{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 12px;
  border: 1px solid var(--pro-border);
  border-radius: var(--pro-radius);
  background: rgba(255,255,255,0.015);
  box-shadow: var(--pro-shadow-sm);
}

.tlw-toolbar__left,
.tlw-toolbar-left,
.admin-controls > div:first-child{
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.tlw-toolbar__right,
.tlw-toolbar-right,
.admin-controls > div:last-child{
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.search-box{
  min-height: 40px;
  padding: 10px 12px;
}

.filters{
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

.filter-btn{
  border: 1px solid rgba(255,255,255,0.10);
  background: rgba(255,255,255,0.03);
  color: var(--text-muted);
  padding: 8px 10px;
  border-radius: 999px;
  transition: background var(--pro-dur) var(--pro-ease), border-color var(--pro-dur) var(--pro-ease), color var(--pro-dur) var(--pro-ease), transform var(--pro-dur) var(--pro-ease);
}

.filter-btn:hover{
  background: rgba(255,255,255,0.05);
  border-color: rgba(255,255,255,0.16);
  color: var(--text-main);
  transform: translateY(-1px);
}

.filter-btn.active{
  background: rgba(59,130,246,0.16);
  border-color: rgba(59,130,246,0.28);
  color: var(--text-main);
}

/* small button polish used across admin tables */
.btn-small{
  padding: 10px 12px;
  border: 1px solid rgba(255,255,255,0.10);
  background: rgba(255,255,255,0.03);
  color: var(--text-main);
  transition: background var(--pro-dur) var(--pro-ease), transform var(--pro-dur) var(--pro-ease);
}

.btn-small:hover{ background: rgba(255,255,255,0.05); transform: translateY(-1px); }

/* ------------------------------------------------------------------
   Cards / containers
   ------------------------------------------------------------------ */
.metric-card,
.admin-widget,
.hero-side-card,
.user-action-card,
.card,
.panel,
.section-card,
.settings-card{
  border: 1px solid var(--pro-border);
  border-radius: var(--pro-radius);
  background: rgba(255,255,255,0.02);
  box-shadow: var(--pro-shadow-sm);
}

.metric-card:hover,
.admin-widget:hover,
.user-action-card:hover{
  border-color: var(--pro-border-strong);
  box-shadow: var(--pro-shadow-md);
  transform: translateY(-1px);
  transition: transform var(--pro-dur) var(--pro-ease), box-shadow var(--pro-dur) var(--pro-ease), border-color var(--pro-dur) var(--pro-ease);
}

/* ------------------------------------------------------------------
   Buttons
   ------------------------------------------------------------------ */
.btn-primary,
button.btn-primary{
  border-radius: 12px;
  box-shadow: 0 10px 24px rgba(59,130,246,0.18);
  transition: transform var(--pro-dur) var(--pro-ease), box-shadow var(--pro-dur) var(--pro-ease);
}

.btn-primary:hover{
  transform: translateY(-1px);
}

.btn-small,
.btn-secondary,
.btn-danger,
.btn-outline,
button{
  border-radius: 12px;
}

/* ------------------------------------------------------------------
   Inputs
   ------------------------------------------------------------------ */
input[type="text"],
input[type="email"],
input[type="password"],
input[type="date"],
input[type="time"],
input[type="number"],
select,
textarea{
  border-radius: 12px !important;
  border: 1px solid var(--pro-border) !important;
  background: rgba(255,255,255,0.03) !important;
  transition: border-color var(--pro-dur) var(--pro-ease), box-shadow var(--pro-dur) var(--pro-ease);
}

input:focus,
select:focus,
textarea:focus{
  border-color: rgba(59,130,246,0.45) !important;
  box-shadow: 0 0 0 3px rgba(59,130,246,0.18) !important;
}

/* ------------------------------------------------------------------
   Tables
   ------------------------------------------------------------------ */
.table,
.admin-table,
.data-table{
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  border: 1px solid var(--pro-border);
  border-radius: var(--pro-radius);
  overflow: hidden;
  background: rgba(255,255,255,0.02);
}

.table th, .admin-table th, .data-table th{
  text-align: left;
  font-weight: 650;
  color: var(--text-muted);
  padding: 12px 14px;
  border-bottom: 1px solid var(--pro-border);
  background: rgba(255,255,255,0.02);
}

.table td, .admin-table td, .data-table td{
  padding: 12px 14px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.table tr:hover td,
.admin-table tr:hover td,
.data-table tr:hover td{
  background: rgba(255,255,255,0.03);
}

/* ------------------------------------------------------------------
   Auth pages (login/register)
   ------------------------------------------------------------------ */
.login-container{
  padding: 28px 16px;
}

.login-card{
  border: 1px solid var(--pro-border);
  border-radius: var(--pro-radius-lg);
  background: rgba(255,255,255,0.02);
  box-shadow: var(--pro-shadow-lg);
}

.login-card .app-title{
  letter-spacing: 0.2px;
}

/* ------------------------------------------------------------------
   Notification dropdown polish
   ------------------------------------------------------------------ */
.notif-dropdown{
  border: 1px solid var(--pro-border);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: var(--pro-shadow-lg);
}

.notif-list li:hover{
  background: rgba(255,255,255,0.04);
}

/* Reduce overly-bright glows in some hero sections */
.user-home-hero,
.admin-dashboard-container{
  filter: none;
}

/* ------------------------------------------------------------------
   Responsive improvements
   ------------------------------------------------------------------ */
@media (max-width: 900px){
  .layout{flex-direction: column;}
  .sidebar{
    width: 100%;
    position: sticky;
    top: 64px;
    z-index: 40;
    border-right: none;
    border-bottom: 1px solid var(--pro-border);
  }
  .sidebar-nav{
    display: flex;
    gap: 6px;
    padding: 10px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  .sidebar-nav a{white-space: nowrap; margin: 0;}
  .main-content{padding: 16px;}
}

@media (max-width: 640px){
  .topbar{padding: 0 12px;}
  .topnav{display: none;}
  .topbar .logo{font-size: 15px;}
}

/* ------------------------------------------------------------------
   Content width (keeps pages feeling "designed")
   ------------------------------------------------------------------ */
.main-content > *,
.home-container,
.settings-container,
.dashboard-container,
.admin-dashboard-container{
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}

/* ------------------------------------------------------------------
   Form polish
   ------------------------------------------------------------------ */
.form-group label{
  color: var(--text-muted);
  font-size: 13px;
}

.form-group input,
.form-group select,
.form-group textarea{
  margin-top: 6px;
}

/* ------------------------------------------------------------------
   Phase E: Empty states + skeleton + loading
   ------------------------------------------------------------------ */

/* Empty states: more "product" feeling */
.empty-state{
  border-style: dashed;
  background: color-mix(in srgb, var(--surface-2) 88%, transparent);
  position: relative;
  overflow: hidden;
}

.empty-state::before{
  content: "";
  position: absolute;
  inset: -2px;
  pointer-events: none;
  background:
    radial-gradient(420px circle at 18% 18%, color-mix(in srgb, var(--primary) 12%, transparent), transparent 50%),
    radial-gradient(360px circle at 80% 30%, rgba(255,255,255,0.05), transparent 55%);
  opacity: 0.9;
}

.empty-state > *{ position: relative; }

.empty-state__title{ letter-spacing: 0.1px; }
.empty-state__desc{ max-width: 70ch; }

/* Generic empty list items */
li.empty,
div.empty{
  padding: 14px 14px;
  border: 1px dashed var(--pro-border-strong);
  border-radius: var(--pro-radius);
  color: var(--text-muted);
  background: rgba(255,255,255,0.02);
}

/* Loading blocks */
.loading{
  padding: 12px 14px;
  border-radius: var(--pro-radius);
  border: 1px solid var(--pro-border);
  background: rgba(255,255,255,0.02);
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.loading::before{
  content: "";
  width: 16px;
  height: 16px;
  border-radius: 999px;
  border: 2px solid rgba(255,255,255,0.18);
  border-top-color: rgba(255,255,255,0.65);
  animation: tlwSpin 0.9s linear infinite;
}

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

@media (prefers-reduced-motion: reduce){
  .loading::before{ animation: none; }
}

/* Skeleton polish (works with .skeleton and chat shimmer rows) */
.skeleton,
.skeleton-item .skeleton-avatar,
.skeleton-item .skeleton-line,
.skeleton-item .skeleton-pill,
.skeleton-item .skeleton-badge{
  background: color-mix(in srgb, var(--surface-2) 82%, rgba(255,255,255,0.03)) !important;
  border-color: var(--pro-border) !important;
}

.skeleton::after,
.skeleton-item.shimmer::after{
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.10), transparent) !important;
  animation-duration: 1.15s;
}

/* Chat skeleton bubbles */
.chat-skeleton{
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.chat-skel-row{
  max-width: 72%;
}

.chat-skel-row.out{ align-self: flex-end; }

.chat-skel-bubble{
  padding: 10px 12px;
  border-radius: 18px;
}

.chat-skel-bubble .skeleton-line{ margin: 6px 0; }

/* ------------------------------------------------------------------
   Phase E: Toasts + modals (match dark app)
   ------------------------------------------------------------------ */

/* Override the injected Phase A UI to look consistent on dark theme */
.tlw-toast{
  background: rgba(15, 23, 42, 0.92) !important;
  border: 1px solid var(--pro-border-strong) !important;
  box-shadow: var(--pro-shadow-md) !important;
}

.tlw-toast .tlw-title,
.tlw-toast .tlw-msg{
  color: var(--text-main) !important;
}

.tlw-toast .tlw-msg{ opacity: 0.86; }
.tlw-toast .tlw-close{ color: rgba(255,255,255,0.65) !important; }

.tlw-overlay{
  background: rgba(0,0,0,0.55) !important;
}

.tlw-modal{
  background: rgba(15, 23, 42, 0.96) !important;
  border: 1px solid var(--pro-border-strong) !important;
  box-shadow: var(--pro-shadow-lg) !important;
  animation: tlwPop var(--pro-dur-slow) var(--pro-ease);
}

@keyframes tlwPop{
  from{ transform: translateY(10px) scale(0.98); opacity: 0; }
  to{ transform: translateY(0) scale(1); opacity: 1; }
}

.tlw-modal h3{ color: var(--text-main) !important; }
.tlw-modal p{ color: var(--text-muted) !important; }

.tlw-input{
  background: rgba(255,255,255,0.04) !important;
  border: 1px solid var(--pro-border-strong) !important;
  color: var(--text-main) !important;
}

.tlw-input:focus{
  box-shadow: var(--pro-soft-glow) !important;
}

.tlw-btn{
  background: rgba(255,255,255,0.06) !important;
  border: 1px solid var(--pro-border-strong) !important;
  color: var(--text-main) !important;
  transition: transform var(--pro-dur-fast) var(--pro-ease), background var(--pro-dur-fast) var(--pro-ease);
}

.tlw-btn:hover{ background: rgba(255,255,255,0.09) !important; transform: translateY(-1px); }
.tlw-btn:active{ transform: translateY(0); }

.tlw-btn.primary{
  background: var(--primary) !important;
  border-color: color-mix(in srgb, var(--primary) 65%, transparent) !important;
  color: #fff !important;
}

.tlw-btn.primary:hover{ background: var(--primary-hover) !important; }

.tlw-btn.danger{
  background: rgba(225,29,72,0.95) !important;
  border-color: rgba(225,29,72,0.95) !important;
  color: #fff !important;
}

/* ------------------------------------------------------------------
   Phase E: Icon consistency
   ------------------------------------------------------------------ */

button svg,
a svg{
  vertical-align: middle;
}

.icon-btn,
.btn-icon{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.icon-btn svg,
.btn-icon svg{
  width: 18px;
  height: 18px;
}


/* ------------------------------------------------------------------
   Phase F: Tables & Empty states + Mobile polish
   ------------------------------------------------------------------ */

/* Consistent empty states (works in tables, lists, sections) */
.tlw-empty-state{
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 18px 12px;
  color: var(--text-muted);
}

.tlw-empty-state::before{
  content: "";
  width: 54px;
  height: 54px;
  border-radius: 16px;
  background: radial-gradient(circle at 30% 30%, rgba(255,255,255,0.10), rgba(255,255,255,0.03));
  border: 1px solid var(--pro-border-strong);
  box-shadow: var(--pro-shadow-sm);
}

.tlw-empty-title{
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: 0.2px;
}

.tlw-empty-sub{
  font-size: 13px;
  line-height: 1.35;
  max-width: 420px;
  text-align: center;
  opacity: 0.9;
}

/* Table empty cells */
.admin-table td.tlw-table-empty,
.admin-table td[colspan].tlw-table-empty{
  padding: 18px !important;
}

.admin-table td[colspan]:only-child{
  padding: 18px !important;
  color: var(--text-muted);
}

/* Make admin tables usable on mobile */
@media (max-width: 820px){
  .admin-table{
    display: block;
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-radius: 14px;
  }

  .admin-controls{
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }

  .admin-controls .search-box{
    width: 100%;
  }

  .admin-controls .filters{
    display: flex;
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    gap: 8px;
    padding-bottom: 4px;
  }

  .admin-controls .filters .filter-btn{
    white-space: nowrap;
  }

  /* Notification dropdown sizing on mobile */
  .notif-dropdown{
    width: min(92vw, 420px);
    right: 10px;
    left: auto;
  }

  /* Bigger tap targets */
  .sidebar-nav a,
  .topbar a,
  .topbar button,
  .btn-small,
  .btn-primary,
  .btn-secondary,
  .btn{
    min-height: 40px;
  }
}

/* Notification list skeleton items */
.notif-list .notif-skel{
  padding: 10px 10px;
  border-bottom: 1px solid var(--border);
}

.notif-list .notif-skel:last-child{ border-bottom: none; }

.notif-list .notif-skel .skeleton{
  margin: 6px 0;
}

/* Accessibility: screen-reader only */
.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;}