/* ============================================================================
   ToolGpt — Cyber/Pentesting Theme
   ----------------------------------------------------------------------------
   Grok/ChatGPT-inspired dark UI with a cybersecurity twist:
     - Deep black backgrounds (#0a0a0b)
     - Terminal green primary accent (#00ff9c)
     - Cyan secondary (#00d4ff)
     - JetBrains Mono for code/labels, Inter for body
     - Subtle grid background + scanline overlay for the auth page
   ============================================================================ */

/* ---- Design tokens ----------------------------------------------------- */
:root {
  /* Surfaces */
  --bg:          #0a0a0b;
  --bg-elev-1:   #111114;
  --bg-elev-2:   #17171c;
  --bg-elev-3:   #1f1f26;
  --bg-hover:    #22222a;
  --border:      #26262e;
  --border-hi:   #34343f;

  /* Text */
  --text:        #e8e8ea;
  --text-muted:  #9a9aa3;
  --text-dim:    #6a6a73;

  /* Accents */
  --accent:      #00ff9c;          /* terminal green */
  --accent-dim:  #00b870;
  --accent-glow: rgba(0, 255, 156, 0.18);
  --cyan:        #00d4ff;
  --cyan-glow:   rgba(0, 212, 255, 0.18);
  --danger:      #ff4d6d;
  --warn:        #ffb000;

  /* Plan colors */
  --plan-free:   #6a6a73;
  --plan-pro:    #00d4ff;
  --plan-ultra:  #b48bff;

  /* Radii */
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 14px;
  --r-xl: 20px;

  /* Fonts */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Menlo, Consolas, monospace;

  /* Shadows */
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.6);
  --glow-accent: 0 0 0 1px var(--accent), 0 0 20px var(--accent-glow);
}

/* ---- Reset ------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: none; padding: 0; }
input, textarea, select {
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 10px 12px;
  color: var(--text);
  outline: none;
  transition: border-color .15s, box-shadow .15s, background .15s;
  width: 100%;
}
input:focus, textarea:focus, select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
  background: var(--bg-elev-3);
}
input::placeholder, textarea::placeholder { color: var(--text-dim); }
.hidden { display: none !important; }

/* ---- Buttons ----------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: var(--r-md);
  border: 1px solid var(--border);
  background: var(--bg-elev-2);
  color: var(--text);
  font-weight: 500;
  font-size: 14px;
  transition: background .15s, border-color .15s, transform .05s, opacity .15s;
  white-space: nowrap;
}
.btn:hover:not(:disabled) { background: var(--bg-hover); border-color: var(--border-hi); }
.btn:active:not(:disabled) { transform: translateY(1px); }
.btn:disabled { opacity: .5; cursor: not-allowed; }

.btn-primary {
  background: var(--accent);
  color: #001a10;
  border-color: var(--accent);
  font-weight: 600;
}
.btn-primary:hover:not(:disabled) {
  background: var(--accent-dim);
  border-color: var(--accent-dim);
  box-shadow: 0 0 24px var(--accent-glow);
}

.btn-ghost { background: transparent; border-color: transparent; }
.btn-ghost:hover:not(:disabled) { background: var(--bg-elev-2); }

.btn-danger { color: var(--danger); border-color: var(--border); }
.btn-danger:hover:not(:disabled) { background: rgba(255, 77, 109, 0.1); border-color: var(--danger); }

.btn-google {
  background: #fff;
  color: #1a1a1a;
  border-color: #fff;
  font-weight: 500;
}
.btn-google:hover:not(:disabled) { background: #f0f0f0; }

.btn-icon {
  width: 36px; height: 36px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--r-sm);
}
.btn-icon svg { width: 18px; height: 18px; }

/* ---- Badges ------------------------------------------------------------ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
  font-family: var(--font-mono);
}
.badge-plan-free  { background: rgba(106,106,115,.15); color: var(--plan-free); border: 1px solid rgba(106,106,115,.3); }
.badge-plan-pro   { background: var(--cyan-glow);      color: var(--cyan);      border: 1px solid rgba(0,212,255,.3); }
.badge-plan-ultra { background: rgba(180,139,255,.15); color: var(--plan-ultra);border: 1px solid rgba(180,139,255,.3); }

/* ============================================================================
   AUTH PAGE (login-signup.html)
   ============================================================================ */
.auth-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(800px circle at 20% 10%, rgba(0,255,156,.06), transparent 60%),
    radial-gradient(700px circle at 80% 90%, rgba(0,212,255,.06), transparent 60%),
    var(--bg);
}
.auth-page::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse at center, #000 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 70%);
  pointer-events: none;
}
.auth-page::after {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg, transparent 0, transparent 3px, rgba(0,255,156,.012) 3px, rgba(0,255,156,.012) 4px
  );
  pointer-events: none;
  animation: scan 8s linear infinite;
}
@keyframes scan {
  0% { background-position: 0 0; }
  100% { background-position: 0 80px; }
}

.auth-card {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 440px;
  background: var(--bg-elev-1);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  padding: 36px 32px;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(8px);
}

.auth-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
  justify-content: center;
}
.auth-logo-mark {
  width: 44px; height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), var(--cyan));
  display: grid; place-items: center;
  box-shadow: 0 0 24px var(--accent-glow);
  color: #001a10;
}
.auth-logo-mark svg { width: 24px; height: 24px; }
.auth-logo-name {
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -.02em;
  background: linear-gradient(90deg, var(--accent), var(--cyan));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.auth-tagline {
  text-align: center;
  color: var(--text-muted);
  font-size: 13px;
  font-family: var(--font-mono);
  margin: 0 0 28px;
  letter-spacing: .02em;
}

.auth-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 4px;
  background: var(--bg-elev-2);
  padding: 4px;
  border-radius: var(--r-md);
  margin-bottom: 24px;
  border: 1px solid var(--border);
}
.auth-tab {
  padding: 8px 12px;
  border-radius: var(--r-sm);
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 500;
  transition: background .15s, color .15s;
  text-align: center;
}
.auth-tab:hover { color: var(--text); }
.auth-tab.active {
  background: var(--bg-elev-3);
  color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent-glow);
}

.auth-field { margin-bottom: 14px; }
.auth-field label {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 6px;
  font-family: var(--font-mono);
  letter-spacing: .02em;
}

.auth-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 20px;
}
.auth-actions .btn { width: 100%; padding: 12px; }

.auth-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 20px 0;
  color: var(--text-dim);
  font-size: 12px;
  font-family: var(--font-mono);
}
.auth-divider::before, .auth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.auth-message {
  margin-top: 14px;
  padding: 10px 12px;
  border-radius: var(--r-sm);
  font-size: 13px;
  font-family: var(--font-mono);
  border: 1px solid;
}
.auth-message.info    { background: var(--bg-elev-2); border-color: var(--border);     color: var(--text); }
.auth-message.success { background: rgba(0,255,156,.08); border-color: var(--accent);  color: var(--accent); }
.auth-message.error   { background: rgba(255,77,109,.08); border-color: var(--danger); color: var(--danger); }

.auth-footer {
  margin-top: 24px;
  text-align: center;
  font-size: 12px;
  color: var(--text-dim);
  font-family: var(--font-mono);
}
.auth-footer kbd {
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent);
}

/* ============================================================================
   APP SHELL (index.html)
   ============================================================================ */
.app-shell {
  display: grid;
  grid-template-columns: 280px 1fr;
  height: 100vh;
  overflow: hidden;
}

/* ---- Sidebar ----------------------------------------------------------- */
.sidebar {
  background: var(--bg-elev-1);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.sidebar-head {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
}
.sidebar-logo-mark {
  width: 32px; height: 32px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--cyan));
  display: grid; place-items: center;
  color: #001a10;
  flex-shrink: 0;
}
.sidebar-logo-mark svg { width: 18px; height: 18px; }
.sidebar-logo-name {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -.01em;
  background: linear-gradient(90deg, var(--accent), var(--cyan));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.sidebar-section {
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.sidebar-section-label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-dim);
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: 4px 8px;
  margin-top: 8px;
}

.sidebar-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: var(--r-sm);
  color: var(--text-muted);
  font-size: 14px;
  transition: background .12s, color .12s;
  text-align: left;
  width: 100%;
}
.sidebar-btn:hover { background: var(--bg-elev-2); color: var(--text); }
.sidebar-btn svg { width: 16px; height: 16px; flex-shrink: 0; }

.sidebar-history {
  flex: 1;
  overflow-y: auto;
  padding: 0 12px 12px;
  min-height: 0;
}
.sidebar-history::-webkit-scrollbar { width: 6px; }
.sidebar-history::-webkit-scrollbar-thumb { background: var(--border-hi); border-radius: 3px; }
.sidebar-history::-webkit-scrollbar-track { background: transparent; }

.history-day {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-dim);
  padding: 12px 8px 6px;
  letter-spacing: .04em;
}
.history-item {
  display: grid;
  grid-template-columns: 56px 1fr auto;
  gap: 8px;
  width: 100%;
  padding: 8px 10px;
  border-radius: var(--r-sm);
  color: var(--text-muted);
  font-size: 13px;
  text-align: left;
  align-items: center;
  transition: background .12s;
}
.history-item:hover { background: var(--bg-elev-2); color: var(--text); }
.history-role {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: .04em;
}
.history-item.history-assistant .history-role { color: var(--cyan); }
.history-preview {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.history-time {
  font-size: 10px;
  color: var(--text-dim);
  font-family: var(--font-mono);
}

.sidebar-empty, .sidebar-loading, .sidebar-error {
  padding: 16px 12px;
  text-align: center;
  color: var(--text-dim);
  font-size: 13px;
  font-family: var(--font-mono);
}

.sidebar-foot {
  border-top: 1px solid var(--border);
  padding: 12px;
}
.sidebar-user {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: var(--r-sm);
  background: var(--bg-elev-2);
  margin-bottom: 8px;
}
.sidebar-user-avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--cyan));
  display: grid; place-items: center;
  color: #001a10;
  font-weight: 700;
  font-size: 13px;
  font-family: var(--font-mono);
  flex-shrink: 0;
}
.sidebar-user-info { flex: 1; min-width: 0; }
.sidebar-user-email {
  font-size: 13px;
  font-family: var(--font-mono);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.sidebar-user-plan {
  font-size: 10px;
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: .08em;
}
.sidebar-user-plan[data-plan="free"]  { color: var(--plan-free); }
.sidebar-user-plan[data-plan="pro"]   { color: var(--plan-pro); }
.sidebar-user-plan[data-plan="ultra"] { color: var(--plan-ultra); }

/* ---- Main chat area ---------------------------------------------------- */
.chat-main {
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-width: 0;
  background: var(--bg);
}

.chat-topbar {
  height: 56px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  background: var(--bg-elev-1);
}
.chat-topbar-left { display: flex; align-items: center; gap: 10px; }
.chat-topbar-right { display: flex; align-items: center; gap: 8px; }

#sidebar-toggle { display: none; }

.chat-model-indicator {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
}
.chat-model-indicator::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .4; }
}
.chat-model-indicator[data-plan="pro"]::before { background: var(--cyan); box-shadow: 0 0 8px var(--cyan); }

.chat-quota {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-elev-2);
}
.chat-quota.quota-warn { color: var(--warn); border-color: var(--warn); }
.chat-quota.quota-full { color: var(--danger); border-color: var(--danger); }

/* ---- Message list ------------------------------------------------------ */
.chat-messages {
  overflow-y: auto;
  padding: 24px 0;
  scroll-behavior: smooth;
}
.chat-messages::-webkit-scrollbar { width: 8px; }
.chat-messages::-webkit-scrollbar-thumb { background: var(--border-hi); border-radius: 4px; }
.chat-messages::-webkit-scrollbar-track { background: transparent; }

.chat-empty {
  max-width: 720px;
  margin: 0 auto;
  padding: 60px 24px;
  text-align: center;
}
.chat-empty-mark {
  width: 64px; height: 64px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--accent), var(--cyan));
  display: grid; place-items: center;
  margin: 0 auto 20px;
  box-shadow: 0 0 40px var(--accent-glow);
  color: #001a10;
}
.chat-empty-mark svg { width: 32px; height: 32px; }
.chat-empty h1 {
  font-family: var(--font-mono);
  font-size: 28px;
  margin: 0 0 8px;
  background: linear-gradient(90deg, var(--accent), var(--cyan));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.chat-empty p { color: var(--text-muted); margin: 0 0 24px; font-size: 15px; }
.chat-empty-suggestions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  text-align: left;
}
.chat-empty-suggestions button {
  padding: 14px;
  background: var(--bg-elev-1);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  color: var(--text);
  font-size: 13px;
  text-align: left;
  transition: background .12s, border-color .12s;
}
.chat-empty-suggestions button:hover { background: var(--bg-elev-2); border-color: var(--accent); }
.chat-empty-suggestions button strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
  margin-bottom: 4px;
  letter-spacing: .04em;
}

.msg {
  max-width: 760px;
  margin: 0 auto 24px;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 14px;
}
.msg-avatar {
  width: 32px; height: 32px;
  border-radius: 8px;
  display: grid; place-items: center;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  flex-shrink: 0;
}
.msg-user .msg-avatar { background: var(--bg-elev-3); color: var(--text-muted); }
.msg-assistant .msg-avatar {
  background: linear-gradient(135deg, var(--accent), var(--cyan));
  color: #001a10;
  box-shadow: 0 0 16px var(--accent-glow);
}
.msg-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-dim);
  margin-bottom: 4px;
  display: flex;
  gap: 8px;
  align-items: center;
}
.msg-model {
  color: var(--accent);
  font-size: 10px;
  letter-spacing: .04em;
}
.msg-time { color: var(--text-dim); }

.msg-body {
  font-size: 15px;
  line-height: 1.6;
  color: var(--text);
  word-wrap: break-word;
  overflow-wrap: break-word;
}
.msg-body p { margin: 0 0 12px; }
.msg-body p:last-child { margin-bottom: 0; }
.msg-body h1, .msg-body h2, .msg-body h3 { margin: 18px 0 10px; font-weight: 600; }
.msg-body h1 { font-size: 20px; }
.msg-body h2 { font-size: 18px; }
.msg-body h3 { font-size: 16px; color: var(--accent); }
.msg-body ul, .msg-body ol { margin: 0 0 12px; padding-left: 22px; }
.msg-body li { margin: 4px 0; }
.msg-body code {
  font-family: var(--font-mono);
  font-size: 13px;
  background: var(--bg-elev-2);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--border);
  color: var(--accent);
}
.msg-body pre {
  background: #050507;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 14px 16px;
  overflow-x: auto;
  margin: 0 0 12px;
  position: relative;
}
.msg-body pre::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: .4;
}
.msg-body pre code {
  background: transparent;
  border: 0;
  padding: 0;
  color: var(--text);
  font-size: 13px;
  line-height: 1.5;
}
.msg-body a { color: var(--cyan); text-decoration: underline; }
.msg-body strong { color: var(--text); font-weight: 600; }
.msg-body em { color: var(--text-muted); }

.msg-system .msg-body {
  color: var(--warn);
  font-style: italic;
  background: rgba(255,176,0,.06);
  border-left: 2px solid var(--warn);
  padding: 10px 14px;
  border-radius: var(--r-sm);
}

/* Typing indicator */
.msg-typing .msg-body { display: flex; gap: 4px; padding-top: 6px; }
.typing-dots { display: inline-flex; gap: 4px; }
.typing-dots span {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--accent);
  animation: typing 1.2s infinite ease-in-out;
}
.typing-dots span:nth-child(2) { animation-delay: .15s; }
.typing-dots span:nth-child(3) { animation-delay: .3s; }
@keyframes typing {
  0%, 60%, 100% { transform: translateY(0); opacity: .4; }
  30% { transform: translateY(-4px); opacity: 1; }
}

/* ---- Composer --------------------------------------------------------- */
.chat-composer {
  border-top: 1px solid var(--border);
  background: var(--bg-elev-1);
  padding: 14px 24px 20px;
}
.chat-composer-inner {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  gap: 10px;
  align-items: flex-end;
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 10px;
  transition: border-color .15s, box-shadow .15s;
}
.chat-composer-inner:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
#chat-input {
  flex: 1;
  background: transparent;
  border: 0;
  resize: none;
  padding: 8px 10px;
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.5;
  max-height: 240px;
  color: var(--text);
}
#chat-input:focus { box-shadow: none; background: transparent; }
.chat-send-btn {
  width: 36px; height: 36px;
  border-radius: var(--r-sm);
  background: var(--accent);
  color: #001a10;
  display: grid; place-items: center;
  transition: background .15s, opacity .15s;
  flex-shrink: 0;
}
.chat-send-btn:hover:not(:disabled) { background: var(--accent-dim); }
.chat-send-btn:disabled { opacity: .4; cursor: not-allowed; }
.chat-send-btn svg { width: 16px; height: 16px; }
.chat-composer-hint {
  max-width: 760px;
  margin: 8px auto 0;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-dim);
  text-align: center;
}
.chat-composer-hint kbd {
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 5px;
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 10px;
}

/* ---- Modals ----------------------------------------------------------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, .7);
  backdrop-filter: blur(4px);
  display: grid;
  place-items: center;
  padding: 24px;
  z-index: 100;
}
.modal-overlay[hidden] { display: none; }
.modal {
  background: var(--bg-elev-1);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  width: 100%;
  max-width: 520px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  position: relative;
}
.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  border-bottom: 1px solid var(--border);
}
.modal-title {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  margin: 0;
  letter-spacing: -.01em;
}
.modal-body { padding: 24px; }
.modal-foot {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

.modal-close {
  width: 32px; height: 32px;
  border-radius: var(--r-sm);
  display: grid; place-items: center;
  color: var(--text-muted);
  transition: background .12s, color .12s;
}
.modal-close:hover { background: var(--bg-elev-2); color: var(--text); }
.modal-close svg { width: 16px; height: 16px; }

/* ---- Settings panel --------------------------------------------------- */
.settings-section { margin-bottom: 24px; }
.settings-section:last-child { margin-bottom: 0; }
.settings-section h3 {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: .06em;
  text-transform: uppercase;
  margin: 0 0 10px;
  font-weight: 600;
}

.plan-card {
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 16px;
}
.plan-card[data-plan="pro"]   { border-color: rgba(0,212,255,.4); box-shadow: 0 0 0 1px rgba(0,212,255,.15); }
.plan-card[data-plan="ultra"] { border-color: rgba(180,139,255,.4); box-shadow: 0 0 0 1px rgba(180,139,255,.15); }
.plan-name {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 8px;
}
.plan-card[data-plan="free"]  .plan-name { color: var(--plan-free); }
.plan-card[data-plan="pro"]   .plan-name { color: var(--plan-pro); }
.plan-card[data-plan="ultra"] .plan-name { color: var(--plan-ultra); }
.plan-meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 13px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  margin-bottom: 8px;
}
.plan-expiry {
  font-size: 12px;
  color: var(--cyan);
  font-family: var(--font-mono);
  margin-top: 8px;
}
.plan-soon {
  margin-top: 12px;
  padding: 10px 12px;
  background: rgba(180,139,255,.08);
  border: 1px dashed rgba(180,139,255,.4);
  border-radius: var(--r-sm);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--plan-ultra);
  text-align: center;
}

.quota-bar-wrap {
  background: var(--bg-elev-2);
  border-radius: 999px;
  height: 8px;
  overflow: hidden;
  border: 1px solid var(--border);
  margin-bottom: 8px;
}
#settings-quota-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--cyan));
  border-radius: 999px;
  transition: width .3s;
  min-width: 2px;
}
#settings-quota-bar.over { background: var(--danger); }
#settings-quota-text {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
}

.usage-chart {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  height: 100px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 8px;
}
.usage-col {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  height: 100%;
  justify-content: flex-end;
}
.usage-bar {
  width: 100%;
  background: linear-gradient(180deg, var(--accent), var(--accent-dim));
  border-radius: 4px 4px 0 0;
  min-height: 2px;
  transition: height .3s;
}
.usage-label {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-dim);
}

/* ---- Payment modal ---------------------------------------------------- */
.payment-dest {
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 10px 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
  margin-bottom: 12px;
  text-align: center;
}
.payment-amount-display {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}
.payment-amount-display span { color: var(--text-muted); font-family: var(--font-mono); font-size: 13px; }

.request-row {
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  gap: 10px;
  align-items: center;
  padding: 10px 12px;
  background: var(--bg-elev-2);
  border-radius: var(--r-sm);
  margin-bottom: 6px;
  font-size: 12px;
  font-family: var(--font-mono);
}
.req-method { font-weight: 700; color: var(--text); }
.req-amount { color: var(--accent); }
.req-trx    { color: var(--text-muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.req-time   { color: var(--text-dim); font-size: 10px; }
.status-pending  { color: var(--warn); }
.status-approved { color: var(--accent); }
.status-rejected { color: var(--danger); }

/* ---- Toasts ----------------------------------------------------------- */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: 360px;
}
.toast {
  background: var(--bg-elev-3);
  border: 1px solid var(--border-hi);
  border-radius: var(--r-md);
  padding: 12px 16px;
  font-size: 13px;
  box-shadow: var(--shadow-md);
  animation: toast-in .2s ease-out;
  font-family: var(--font-mono);
}
.toast-info    { border-left: 3px solid var(--cyan); }
.toast-success { border-left: 3px solid var(--accent); }
.toast-error   { border-left: 3px solid var(--danger); }
.toast.fade-out { animation: toast-out .3s ease-in forwards; }
@keyframes toast-in {
  from { opacity: 0; transform: translateX(20px); }
  to   { opacity: 1; transform: translateX(0); }
}
@keyframes toast-out {
  to { opacity: 0; transform: translateX(20px); }
}

/* ---- Splash + Fatal --------------------------------------------------- */
.app-splash, .app-fatal {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  background: var(--bg);
  z-index: 300;
  text-align: center;
  padding: 24px;
}
.app-splash .splash-spinner {
  width: 32px; height: 32px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 16px;
}
@keyframes spin { to { transform: rotate(360deg); } }
.splash-text { color: var(--text-muted); font-family: var(--font-mono); font-size: 13px; }

.app-fatal { flex-direction: column; gap: 16px; }
.fatal-msg {
  font-family: var(--font-mono);
  color: var(--warn);
  font-size: 15px;
  max-width: 480px;
}
.app-fatal button { padding: 10px 20px; }

/* ---- Responsive ------------------------------------------------------- */
@media (max-width: 880px) {
  .app-shell { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed;
    top: 0; left: 0; bottom: 0;
    width: 280px;
    z-index: 50;
    transform: translateX(-100%);
    transition: transform .2s ease-out;
    box-shadow: var(--shadow-lg);
  }
  .sidebar.open { transform: translateX(0); }
  #sidebar-toggle { display: inline-flex; }
  .chat-empty-suggestions { grid-template-columns: 1fr; }
  .msg { padding: 0 16px; }
  .chat-composer { padding: 12px 16px 16px; }
  .modal-overlay { padding: 12px; }
}