/* ============================================================
   TEXXTO v2 — BRAND DESIGN SYSTEM
   Stripe precision · Apple darkness · Dialpad energy
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:ital,opsz,wght@0,14..32,400;0,14..32,500;0,14..32,600;0,14..32,700;0,14..32,800;0,14..32,900;1,14..32,400&display=swap');

:root {
  /* ── Backgrounds (Apple-dark) ── */
  --bg-void:    #000000;
  --bg-base:    #07070f;
  --bg-surface: #0d0d1e;
  --bg-raised:  #131327;
  --bg-hover:   #1a1a35;
  --bg-active:  rgba(124,58,237,0.1);

  /* ── Brand (Dialpad violet → Stripe indigo → blue) ── */
  --violet:        #7C3AED;
  --violet-lt:     #9061F9;
  --violet-dim:    rgba(124,58,237,0.13);
  --indigo:        #4F46E5;
  --blue:          #2563EB;
  --grad:          linear-gradient(135deg, #7C3AED 0%, #4F46E5 55%, #2563EB 100%);
  --grad-h:        linear-gradient(135deg, #8B5CF6 0%, #6366f1 55%, #3B82F6 100%);
  --glow:          rgba(124,58,237,0.20);
  --glow-strong:   rgba(124,58,237,0.36);

  /* ── Semantic ── */
  --green:      #10B981;
  --green-dim:  rgba(16,185,129,0.11);
  --red:        #EF4444;
  --red-dim:    rgba(239,68,68,0.11);
  --yellow:     #F59E0B;
  --yellow-dim: rgba(245,158,11,0.11);
  --cyan:       #06B6D4;
  --cyan-dim:   rgba(6,182,212,0.11);

  /* ── Ink (Apple near-white with blue cast) ── */
  --ink:    #EEEEFF;
  --ink-2:  rgba(238,238,255,0.68);
  --ink-3:  rgba(238,238,255,0.38);
  --ink-4:  rgba(238,238,255,0.20);

  /* ── Borders ── */
  --border:        rgba(255,255,255,0.06);
  --border-md:     rgba(255,255,255,0.11);
  --border-accent: rgba(124,58,237,0.28);

  /* ── Radii ── */
  --r-xs:   4px;
  --r-sm:   8px;
  --r:      12px;
  --r-lg:   16px;
  --r-xl:   24px;
  --r-pill: 100px;

  /* ── Type ── */
  --sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: 'SF Mono', 'Fira Code', Menlo, Consolas, monospace;

  /* ── Layout ── */
  --sidebar-w: 248px;
  --topbar-h:  62px;
}

/* ─── Reset ─── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html {
  height: 100%;
  overflow: hidden;
  -webkit-text-size-adjust: 100%;
}
body {
  font-family: var(--sans);
  background: var(--bg-base);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.5;
  height: 100%;
  overflow: hidden;
  overscroll-behavior: none;
  -webkit-overflow-scrolling: touch;
  touch-action: pan-y;
  position: fixed;
  width: 100%;
}
a { color: var(--violet-lt); text-decoration: none; }
a:hover { color: var(--ink); }

/* ─── Layout shell ─── */
.app-layout { display: flex; height: 100vh; overflow: hidden; max-width: 100vw; }

/* ════════════════════════════════════════════════
   SIDEBAR
════════════════════════════════════════════════ */
.sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: var(--bg-surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}
.sidebar::-webkit-scrollbar { width: 0; }

.sidebar-brand {
  padding: 22px 22px 18px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.sidebar-brand-logo {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--ink);
}
.sidebar-brand-logo em {
  font-style: normal;
  background: var(--grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.sidebar-brand-tag {
  font-size: 9.5px;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--ink-4);
  margin-top: 3px;
}

.sidebar-nav {
  flex: 1;
  padding: 10px 8px;
  display: flex;
  flex-direction: column;
  gap: 1px;
}
.sidebar-section-label {
  font-size: 9.5px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-4);
  padding: 16px 12px 5px;
}
.sidebar-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--ink-3);
  border-radius: var(--r-sm);
  transition: background 0.12s, color 0.12s;
  text-decoration: none;
  position: relative;
}
.sidebar-link:hover {
  background: rgba(255,255,255,0.04);
  color: var(--ink-2);
  text-decoration: none;
}
.sidebar-link.active {
  background: var(--violet-dim);
  color: var(--violet-lt);
  font-weight: 600;
}
.sidebar-link.active::before {
  content: '';
  position: absolute;
  left: 0; top: 20%; bottom: 20%;
  width: 3px;
  background: var(--violet);
  border-radius: 0 2px 2px 0;
}
.sidebar-link .icon {
  width: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  opacity: 0.45;
}
.sidebar-link .icon svg { display: block; }
.sidebar-link:hover .icon { opacity: 0.72; }
.sidebar-link.active .icon { opacity: 1; }

.sidebar-footer {
  padding: 10px;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}
.sidebar-user {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 10px;
  border-radius: var(--r-sm);
  cursor: pointer;
  transition: background 0.12s;
}
.sidebar-user:hover { background: rgba(255,255,255,0.04); }
.sidebar-avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--violet-dim);
  border: 1px solid var(--border-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  color: var(--violet-lt);
  flex-shrink: 0;
  letter-spacing: -0.01em;
}
.sidebar-user-info { flex: 1; min-width: 0; }
.sidebar-user-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.01em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sidebar-user-email {
  font-size: 11px;
  color: var(--ink-4);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sidebar-user-action {
  font-size: 11px;
  color: var(--ink-4);
  display: flex;
  align-items: center;
  gap: 4px;
  margin-top: 2px;
}
.sidebar-user-action svg { width: 13px; height: 13px; opacity: 0.5; }
.sidebar-user:hover .sidebar-user-action { color: var(--red); }
.sidebar-user:hover .sidebar-user-action svg { opacity: 1; }

/* ════════════════════════════════════════════════
   MAIN AREA
════════════════════════════════════════════════ */
.main { flex: 1; display: flex; flex-direction: column; overflow: hidden; min-width: 0; max-width: 100%; }

.topbar {
  height: var(--topbar-h);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  flex-shrink: 0;
  background: rgba(13,13,30,0.75);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
}
.topbar h1 {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--ink);
}
.topbar-actions { display: flex; align-items: center; gap: 10px; }

.content {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 28px 32px;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior-y: contain;
  min-width: 0;
  max-width: 100%;
  box-sizing: border-box;
}
.content::-webkit-scrollbar { width: 6px; }
.content::-webkit-scrollbar-track { background: transparent; }
.content::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.08);
  border-radius: 3px;
}
.content::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.16); }

/* ════════════════════════════════════════════════
   STAT CARDS
════════════════════════════════════════════════ */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 24px;
}
.stat-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 20px 22px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.06);
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}
.stat-card:hover {
  border-color: var(--border-md);
  transform: translateY(-2px);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.08), 0 8px 32px rgba(0,0,0,0.22);
}
.stat-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--ink-3);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  margin-bottom: 10px;
}
.stat-value {
  font-size: 30px;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--ink);
}
.stat-value.green { color: var(--green); }
.stat-value.blue  { color: var(--cyan); }
.stat-value.red   { color: var(--red); }
.stat-change { font-size: 12px; font-weight: 600; margin-top: 6px; }
.stat-change.up   { color: var(--green); }
.stat-change.down { color: var(--red); }

/* ════════════════════════════════════════════════
   CARDS / PANELS
════════════════════════════════════════════════ */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.06);
  overflow: hidden;
}
.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 15px 22px;
  border-bottom: 1px solid var(--border);
}
.card-title {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: -0.015em;
  color: var(--ink);
}
.card-body { padding: 22px; }
.card-body.no-pad { padding: 0; }

/* ════════════════════════════════════════════════
   TABLES
════════════════════════════════════════════════ */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
table th {
  text-align: left;
  font-size: 10.5px;
  font-weight: 700;
  color: var(--ink-3);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  padding: 11px 20px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
table td {
  padding: 13px 20px;
  border-bottom: 1px solid var(--border);
  color: var(--ink-2);
  vertical-align: middle;
}
table tbody tr:hover { background: rgba(255,255,255,0.02); }
table tbody tr:last-child td { border-bottom: none; }
td .primary { color: var(--ink); font-weight: 600; }

/* ════════════════════════════════════════════════
   BADGES
════════════════════════════════════════════════ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: var(--r-pill);
  letter-spacing: 0.02em;
}
.badge-green  { background: var(--green-dim);  color: var(--green); }
.badge-red    { background: var(--red-dim);    color: var(--red); }
.badge-yellow { background: var(--yellow-dim); color: var(--yellow); }
.badge-blue   { background: var(--cyan-dim);   color: var(--cyan); }
.badge-accent { background: var(--violet-dim); color: var(--violet-lt); }
.badge-muted  { background: rgba(255,255,255,0.06); color: var(--ink-3); }
.badge-dot    { width: 6px; height: 6px; border-radius: 50%; background: currentColor; }

/* ════════════════════════════════════════════════
   BUTTONS
════════════════════════════════════════════════ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  font-family: var(--sans);
  font-weight: 600;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.16s cubic-bezier(0.25, 0.1, 0.25, 1);
  white-space: nowrap;
  letter-spacing: -0.01em;
}
.btn:hover { text-decoration: none; }
.btn-sm { font-size: 13px; padding: 7px 16px; border-radius: var(--r-sm); }
.btn-md { font-size: 14px; padding: 10px 22px; border-radius: var(--r); }
.btn-primary {
  background: var(--grad);
  color: #fff;
  box-shadow: 0 2px 14px var(--glow);
}
.btn-primary:hover {
  background: var(--grad-h);
  box-shadow: 0 4px 24px var(--glow-strong);
  transform: translateY(-1px);
  color: #fff;
}
.btn-ghost {
  background: rgba(255,255,255,0.05);
  color: var(--ink-2);
  border: 1px solid var(--border-md);
}
.btn-ghost:hover { background: rgba(255,255,255,0.09); color: var(--ink); }
.btn-danger  { background: var(--red-dim); color: var(--red); }
.btn-danger:hover { background: rgba(239,68,68,0.2); }

/* ════════════════════════════════════════════════
   FORMS
════════════════════════════════════════════════ */
.form-group { margin-bottom: 18px; }
.form-label {
  display: block;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--ink-2);
  margin-bottom: 6px;
  letter-spacing: -0.005em;
}
.form-input, .form-select, .form-textarea {
  width: 100%;
  font-family: var(--sans);
  font-size: 14px;
  padding: 10px 14px;
  background: var(--bg-base);
  border: 1px solid var(--border-md);
  border-radius: var(--r-sm);
  color: var(--ink);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--violet);
  box-shadow: 0 0 0 3px rgba(124,58,237,0.14);
}
.form-input::placeholder { color: var(--ink-4); }
.form-textarea { resize: vertical; min-height: 100px; }
.form-select { appearance: none; cursor: pointer; }
.form-hint { font-size: 11.5px; color: var(--ink-4); margin-top: 5px; }

/* ════════════════════════════════════════════════
   SEARCH
════════════════════════════════════════════════ */
.search-bar { position: relative; }
.search-bar input {
  width: 100%;
  font-size: 14px;
  padding: 10px 14px 10px 38px;
  background: var(--bg-base);
  border: 1px solid var(--border-md);
  border-radius: var(--r-sm);
  color: var(--ink);
  outline: none;
  font-family: var(--sans);
  transition: border-color 0.15s, box-shadow 0.15s;
}
.search-bar input:focus {
  border-color: var(--violet);
  box-shadow: 0 0 0 3px rgba(124,58,237,0.14);
}
.search-bar input::placeholder { color: var(--ink-4); }
.search-bar .search-icon {
  position: absolute;
  left: 12px; top: 50%;
  transform: translateY(-50%);
  font-size: 14px;
  color: var(--ink-4);
}

/* ════════════════════════════════════════════════
   EMPTY STATE
════════════════════════════════════════════════ */
.empty-state {
  text-align: center;
  padding: 56px 24px;
  color: var(--ink-4);
}
.empty-state .icon { font-size: 36px; margin-bottom: 14px; opacity: 0.3; }
.empty-state h3 {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink-2);
  margin-bottom: 8px;
}
.empty-state p { font-size: 13.5px; max-width: 300px; margin: 0 auto; line-height: 1.6; }

/* ════════════════════════════════════════════════
   MODAL
════════════════════════════════════════════════ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.72);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
}
.modal-overlay.open { display: flex; }
.modal {
  background: var(--bg-raised);
  border: 1px solid var(--border-md);
  border-radius: var(--r-xl);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.08), 0 40px 100px rgba(0,0,0,0.55);
  width: 100%;
  max-width: 520px;
  max-height: 85vh;
  overflow-y: auto;
  margin: 24px;
}
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
}
.modal-title { font-size: 16px; font-weight: 700; letter-spacing: -0.02em; }
.modal-close {
  background: none;
  border: none;
  color: var(--ink-3);
  font-size: 20px;
  cursor: pointer;
  padding: 4px;
  border-radius: var(--r-xs);
  transition: color 0.12s;
  line-height: 1;
}
.modal-close:hover { color: var(--ink); }
.modal-body { padding: 24px; }
.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  padding: 16px 24px;
  border-top: 1px solid var(--border);
}

/* ════════════════════════════════════════════════
   CHAT
════════════════════════════════════════════════ */
.chat-layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  height: calc(100vh - var(--topbar-h));
}
.chat-list {
  border-right: 1px solid var(--border);
  overflow-y: scroll;
  background: var(--bg-surface);
}
.chat-list-header { padding: 14px; }
.chat-item {
  display: flex;
  gap: 12px;
  padding: 13px 16px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: background 0.1s;
}
.chat-item:hover { background: rgba(255,255,255,0.025); }
.chat-item.active { background: var(--violet-dim); }
.chat-avatar {
  width: 38px; height: 38px;
  border-radius: 50%;
  background: var(--violet-dim);
  border: 1px solid var(--border-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  color: var(--violet-lt);
  flex-shrink: 0;
}
.chat-meta { flex: 1; min-width: 0; }
.chat-name {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.chat-preview {
  font-size: 12px;
  color: var(--ink-4);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: 2px;
}
.chat-time { font-size: 11px; color: var(--ink-4); white-space: nowrap; flex-shrink: 0; }
.chat-pane { display: flex; flex-direction: column; }
.chat-pane-header {
  padding: 16px 22px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  background: rgba(13,13,30,0.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}
.chat-pane-name { font-size: 15px; font-weight: 700; letter-spacing: -0.02em; }
.chat-pane-number { font-size: 12px; color: var(--ink-4); }
.chat-messages {
  flex: 1;
  overflow-y: scroll;
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.chat-list::-webkit-scrollbar,
.chat-messages::-webkit-scrollbar { width: 5px; }
.chat-list::-webkit-scrollbar-track,
.chat-messages::-webkit-scrollbar-track { background: transparent; }
.chat-list::-webkit-scrollbar-thumb,
.chat-messages::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.09); border-radius: 3px; }
.msg {
  max-width: 400px;
  padding: 11px 15px;
  border-radius: var(--r);
  font-size: 14px;
  line-height: 1.55;
}
.msg-out {
  align-self: flex-end;
  background: var(--grad);
  color: #fff;
  border-bottom-right-radius: 4px;
  box-shadow: 0 2px 12px var(--glow);
}
.msg-in {
  align-self: flex-start;
  background: var(--bg-raised);
  border: 1px solid var(--border-md);
  color: var(--ink);
  border-bottom-left-radius: 4px;
}
.msg-time { font-size: 10px; color: rgba(255,255,255,0.32); margin-top: 4px; }
.msg-in .msg-time { color: var(--ink-4); }
.chat-composer {
  padding: 14px 22px;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 10px;
  flex-shrink: 0;
  background: var(--bg-surface);
}
.chat-composer input {
  flex: 1;
  font-size: 14px;
  padding: 11px 15px;
  background: var(--bg-base);
  border: 1px solid var(--border-md);
  border-radius: var(--r-sm);
  color: var(--ink);
  outline: none;
  font-family: var(--sans);
  transition: border-color 0.15s, box-shadow 0.15s;
}
.chat-composer input:focus {
  border-color: var(--violet);
  box-shadow: 0 0 0 3px rgba(124,58,237,0.14);
}
.chat-composer input::placeholder { color: var(--ink-4); }

/* ════════════════════════════════════════════════
   CHART (CSS bars)
════════════════════════════════════════════════ */
.chart-container { position: relative; height: 200px; padding: 16px 0 0; }
.chart-bars { display: flex; align-items: flex-end; gap: 5px; height: 100%; }
.chart-bar {
  flex: 1;
  border-radius: 4px 4px 0 0;
  background: linear-gradient(to top, rgba(124,58,237,0.4), rgba(144,97,249,0.72));
  min-height: 4px;
  transition: background 0.15s;
}
.chart-bar:hover { background: linear-gradient(to top, var(--violet), var(--violet-lt)); }

/* ════════════════════════════════════════════════
   GRID HELPERS
════════════════════════════════════════════════ */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 14px; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mb-32 { margin-bottom: 32px; }
.gap-12 { gap: 12px; }
.mono { font-family: var(--mono); font-size: 13px; }
.text-muted     { color: var(--ink-4); }
.text-secondary { color: var(--ink-2); }

/* ════════════════════════════════════════════════
   MOBILE MENU BUTTON (hidden on desktop)
════════════════════════════════════════════════ */
.mobile-menu-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: none;
  background: none;
  color: var(--ink-2);
  cursor: pointer;
  border-radius: var(--r-sm);
  flex-shrink: 0;
  -webkit-tap-highlight-color: transparent;
}
.mobile-menu-btn:hover { background: rgba(255,255,255,0.06); }
.mobile-menu-btn svg { display: block; }

/* Sidebar overlay (mobile only) */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 199;
  -webkit-tap-highlight-color: transparent;
}

/* Chat back button (mobile only) */
.chat-back-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: none;
  background: rgba(255,255,255,0.06);
  color: var(--ink-2);
  cursor: pointer;
  border-radius: var(--r-sm);
  flex-shrink: 0;
  -webkit-tap-highlight-color: transparent;
}
.chat-back-btn:hover { background: rgba(255,255,255,0.1); }

/* ════════════════════════════════════════════════
   RESPONSIVE
════════════════════════════════════════════════ */

/* ── Tablet ── */
@media (max-width: 1024px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ── Mobile ── */
@media (max-width: 768px) {
  /* Hamburger button visible */
  .mobile-menu-btn { display: flex; }

  /* Sidebar: off-canvas drawer */
  .sidebar {
    position: fixed;
    top: 0; left: 0; bottom: 0;
    width: 280px;
    z-index: 200;
    transform: translateX(-100%);
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: none;
  }
  .sidebar.open {
    transform: translateX(0);
    box-shadow: 4px 0 24px rgba(0,0,0,0.4);
  }
  .sidebar-overlay.open { display: block; }

  /* Topbar: tighter padding, accommodate hamburger */
  .topbar { padding: 0 14px; gap: 8px; }
  .topbar h1 { font-size: 15px; }

  /* Topbar actions: collapse on small screens */
  .topbar-actions { gap: 6px; }
  .topbar-actions .btn-sm { padding: 7px 10px; font-size: 12px; }
  .topbar-actions .btn-label-hide { display: none; }

  /* Content area */
  .content { padding: 16px 14px; }

  /* Stats */
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .stat-card { padding: 14px 16px; }
  .stat-value { font-size: 22px; }
  .stat-label { font-size: 10px; margin-bottom: 6px; }

  /* Grids stack */
  .grid-2, .grid-3 { grid-template-columns: 1fr; }

  /* Chat: mobile list/pane toggle */
  .chat-layout { grid-template-columns: 1fr; }
  .chat-list { display: block; }
  .chat-pane { display: none; }
  .chat-layout.chat-active .chat-list { display: none; }
  .chat-layout.chat-active .chat-pane { display: flex; }
  .chat-back-btn { display: flex; }

  /* Chat composer + messages */
  .chat-messages { padding: 14px; }
  .chat-composer { padding: 10px 14px; gap: 8px; }
  .msg { max-width: min(400px, 85%); }

  /* Tables: tighter padding */
  table th { padding: 9px 12px; }
  table td { padding: 11px 12px; }

  /* Cards */
  .card-header { padding: 12px 16px; }
  .card-body { padding: 16px; }

  /* Modals */
  .modal { margin: 12px; }
  .modal-body { padding: 18px 16px; }
  .modal-header { padding: 16px; }
  .modal-footer { padding: 14px 16px; }

  /* Touch targets: minimum 44px */
  .btn-sm { min-height: 40px; padding: 9px 16px; }
  .sidebar-link { padding: 11px 12px; min-height: 42px; }

  /* Toast: centered on mobile */
  #tx-toast-container {
    left: 14px !important;
    right: 14px !important;
    bottom: 14px !important;
  }
  #tx-toast-container > div { max-width: none !important; }
}

/* ── Universal mobile containment — prevents ANY bleed on ANY device ── */
@media (max-width: 768px) {
  *, *::before, *::after { max-width: 100%; box-sizing: border-box; }
  .app-layout { max-width: 100vw; overflow-x: hidden; }
  .main { min-width: 0; max-width: 100vw; }
  .content { min-width: 0; max-width: 100vw; box-sizing: border-box; overflow-x: hidden; }
  table { display: block; overflow-x: auto; -webkit-overflow-scrolling: touch; width: 100%; }
  thead, tbody, tr { max-width: 100%; }
  canvas { max-width: 100% !important; }
  img { max-width: 100%; height: auto; }
  pre, code { overflow-x: auto; word-break: break-all; }
}

/* ── Small phones (iPhone SE, etc) ── */
@media (max-width: 400px) {
  .stats-grid { grid-template-columns: 1fr; }
  .content { padding: 12px 10px; }
  .topbar { padding: 0 10px; }
  .stat-value { font-size: 20px; }
  .card-header { padding: 10px 12px; }
  .card-body { padding: 12px; }
}