/* ===========================
   iChatBoot — Brand Design System
   =========================== */

:root {
  --color-primary: #7F1BFF;
  --color-primary-dark: #6200E8;
  --color-primary-light: #F3EBFF;
  --color-bg: #FFFFFF;
  --color-surface: #F9F6FF;
  --color-text: #0D0D0D;
  --color-text-secondary: #555555;
  --color-border: #E5E5E5;
  --color-success: #12B76A;
  --color-error: #F04438;
  --color-warning: #F79009;

  --radius-card: 12px;
  --radius-control: 8px;
  --shadow-soft: 0 2px 12px rgba(127, 27, 255, 0.08);
  --shadow-elev: 0 8px 28px rgba(127, 27, 255, 0.16);

  --font-heading: 'Cal Sans', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Instrument Sans', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 400;
  margin: 0 0 var(--space-3);
  color: var(--color-text);
  line-height: 1.2;
  letter-spacing: -0.01em;
}
h1 { font-size: clamp(2rem, 4vw, 3.2rem); }
h2 { font-size: clamp(1.5rem, 2.6vw, 2.2rem); }
h3 { font-size: 1.3rem; }

p { margin: 0 0 var(--space-3); color: var(--color-text-secondary); }
a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

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

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 10px 18px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-control);
  border: 1px solid transparent;
  background: transparent;
  color: var(--color-text);
  cursor: pointer;
  transition: transform 0.05s ease, background 0.15s ease, box-shadow 0.15s ease, opacity 0.15s ease;
  text-decoration: none;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: var(--shadow-soft);
}
.btn-primary:hover { background: var(--color-primary-dark); text-decoration: none; }
.btn-secondary {
  background: var(--color-primary-light);
  color: var(--color-primary);
}
.btn-secondary:hover { background: #E8DAFF; text-decoration: none; }
.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn-ghost:hover { background: var(--color-surface); text-decoration: none; }
.btn-danger {
  background: var(--color-error);
  color: #fff;
}
.btn-danger:hover { filter: brightness(0.95); text-decoration: none; }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn-icon {
  width: 38px; height: 38px; padding: 0;
  border-radius: var(--radius-control);
}

/* ---------- Inputs ---------- */
.input, .select, .textarea {
  width: 100%;
  padding: 10px 14px;
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--color-text);
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-control);
  outline: none;
  transition: border 0.15s ease, box-shadow 0.15s ease;
}
.input:focus, .select:focus, .textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(127, 27, 255, 0.15);
}
.textarea { resize: vertical; min-height: 90px; }
.label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--color-text);
}
.field { margin-bottom: var(--space-4); }
.field-error {
  color: var(--color-error);
  font-size: 13px;
  margin-top: 6px;
}

/* ---------- Cards ---------- */
.card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: var(--space-5);
  box-shadow: var(--shadow-soft);
}

/* ---------- Badges ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  font-size: 12px;
  font-weight: 600;
  border-radius: 999px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  white-space: nowrap;
}
.badge-success { background: rgba(18,183,106,0.12); color: var(--color-success); }
.badge-error { background: rgba(240,68,56,0.12); color: var(--color-error); }
.badge-warning { background: rgba(247,144,9,0.12); color: var(--color-warning); }
.badge-muted { background: #F4F4F4; color: var(--color-text-secondary); }

/* ---------- Layout helpers ---------- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-5);
}
.stack > * + * { margin-top: var(--space-3); }
.row { display: flex; gap: var(--space-3); align-items: center; }
.row-end { display: flex; gap: var(--space-3); align-items: center; justify-content: flex-end; }
.space-between { display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); }
.muted { color: var(--color-text-secondary); }
.hidden { display: none !important; }
.spinner {
  width: 18px; height: 18px;
  border: 2px solid rgba(127,27,255,0.2);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
  display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- Toast / inline notice ---------- */
.notice {
  padding: 12px 14px;
  border-radius: var(--radius-control);
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-size: 14px;
}
.notice-error { background: rgba(240,68,56,0.1); color: var(--color-error); }
.notice-success { background: rgba(18,183,106,0.1); color: var(--color-success); }

/* ---------- Status dot ---------- */
.status-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--color-text-secondary);
  display: inline-block;
  flex-shrink: 0;
}
.status-dot.online { background: var(--color-success); box-shadow: 0 0 0 3px rgba(18,183,106,0.18); }
.status-dot.away   { background: var(--color-warning); }
.status-dot.offline{ background: #B6B6B6; }

/* ---------- Modal ---------- */
.modal-backdrop {
  position: fixed; inset: 0;
  background: rgba(13,13,13,0.45);
  display: flex; align-items: center; justify-content: center;
  z-index: 1000; padding: var(--space-4);
  animation: fade-in 0.18s ease;
}
.modal {
  background: #fff;
  border-radius: var(--radius-card);
  padding: var(--space-5);
  width: 100%;
  max-width: 520px;
  box-shadow: var(--shadow-elev);
  max-height: 90vh; overflow: auto;
}
@keyframes fade-in { from { opacity: 0; } to { opacity: 1; } }

/* ---------- Brand logo block ---------- */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  color: var(--color-text);
  text-decoration: none;
}
.brand-mark {
  width: 32px; height: 32px;
  border-radius: 9px;
  background: linear-gradient(135deg, #7F1BFF, #6200E8);
  display: inline-flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 700; font-family: var(--font-heading);
  box-shadow: var(--shadow-soft);
}
.brand-name { font-size: 18px; font-weight: 400; letter-spacing: -0.01em; }

/* ---------- Tabs ---------- */
.tabs {
  display: flex; gap: 4px;
  background: var(--color-surface);
  padding: 4px;
  border-radius: var(--radius-control);
}
.tab {
  flex: 1;
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 600;
  text-align: center;
  background: transparent;
  border: 0;
  color: var(--color-text-secondary);
  cursor: pointer;
}
.tab.active {
  background: #fff;
  color: var(--color-primary);
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb {
  background: #E5DCFB; border-radius: 5px;
}
::-webkit-scrollbar-thumb:hover { background: #D2C0F6; }
::-webkit-scrollbar-track { background: transparent; }