:root {
  color-scheme: light dark;
  --bg: #0e0f12;
  --panel: #14161b;
  --panel-2: #181a20;
  --panel-3: #20232b;
  --text: #f0f3f9;
  --muted: #9aa4b2;
  --accent: #7aa2ff;
  --accent-2: #9f8cff;
  --danger: #ff5c7a;
  --ok: #4dd0a7;
  --border: #2a2f3a;
  --bubble-user: #1f2633;
  --bubble-assistant: #171a20;
  --code-bg: #0d0f14;
  --code-border: #2a2f3a;
  --link: #a7c5ff;
  --shadow: 0 10px 30px rgba(0,0,0,0.45);


  --app-vh: 100dvh;
  --sidebar-w: 300px; 

   --glow-blue-border: #5e73ff;                  
  --glow-blue-soft: rgba(122,162,255,0.35);     
  --glow-blue-soft-2: rgba(122,162,255,0.18);   
  --glow-blue-peak: rgba(122,162,255,0.44);     
  --glow-blue-peak-2: rgba(122,162,255,0.28);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background:
    radial-gradient(1200px 600px at 90% -10%, rgba(80,120,255,0.12), transparent 60%),
    radial-gradient(1000px 500px at 10% 110%, rgba(150,120,255,0.10), transparent 60%),
    var(--bg);
  color: var(--text);
  font: 14px/1.45 ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
}

#app {
  display: grid;
  grid-template-columns: 300px 1fr;
  height: var(--app-vh);
  min-height: 0;
}

.sidebar {
  border-right: 1px solid var(--border);
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  display: flex;
  flex-direction: column;
  min-width: 280px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 12px;
  margin-left: 12px;
  margin-right: 12px;
  margin-bottom: 12px;
  padding: 10px 8px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(255,255,255,.32), rgba(255,255,255,.12));
  border: 1px solid var(--glass-border);
  position: sticky;
  top: 0;
  z-index: 5;
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(10px);
}

body.night-mode .brand {
  background: linear-gradient(135deg, rgba(12,12,12,.55), rgba(35,35,35,.35));
}


.brand-logo {
  display: grid;                 
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 12px;
  border: 1px solid var(--glass-border);
  background: linear-gradient(135deg, rgba(148, 213, 250, 0.9), rgba(255,255,255,.6));
  box-shadow: 0 6px 18px rgba(0,0,0,.18);
}

body.night-mode .brand-logo {
  background: linear-gradient(135deg, rgba(28,28,28,.95), rgba(50,50,50,.65));
  box-shadow: 0 8px 22px rgba(0,0,0,.35);
}


.brand-emoji {
  display: block;
  font-size: 28px;               
  line-height: 1;
  transform: translateY(1px);    
  text-shadow: 0 2px 6px rgba(0,0,0,.2);
  user-select: none;
}


.brand-text .brand-title {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: .3px;
  color: var(--text-color);
}

.brand-text .brand-subtitle {
  font-size: 12px;
  color: var(--muted-text);
}

.controls { padding: 14px; display: grid; gap: 12px; }
.field { display: grid; gap: 6px; position: relative; }
.label { color: var(--muted); font-size: 12px; }
.field select {
  background: var(--panel-3);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 10px;
  border-radius: 8px;
  outline: none;
}


.has-tooltip .tooltip {
  position: absolute;
  left: 50%;
  bottom: calc(100% + 10px);
  transform: translateX(-50%) translateY(6px);
  opacity: 0;
  pointer-events: none;
  background: var(--panel-3);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 10px;
  font-size: 12px;
  line-height: 1.35;
  box-shadow: var(--shadow);
  max-width: 280px;
  text-align: center;
  z-index: 20;
  transition: opacity .16s ease, transform .16s ease;
}
.has-tooltip .tooltip .tooltip-arrow {
  position: absolute;
  top: 100%;
  left: 50%;
  width: 10px;
  height: 10px;
  background: var(--panel-3);
  border-left: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  transform: translateX(-50%) rotate(45deg);
}
.has-tooltip:hover .tooltip,
.has-tooltip:focus-within .tooltip {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}


.api-key-panel.emphasize { position: relative; } 
.api-key-panel.emphasize .panel-tip {
  position: absolute;
  left: 50%;
  bottom: calc(100% + 12px);
  transform: translateX(-50%) translateY(6px);
  opacity: 0;
  pointer-events: none;
  background: var(--panel-3);
  color: var(--ok);                   
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 12px;
  font-size: 12px;
  line-height: 1.35;
  box-shadow: var(--shadow);
  max-width: 320px;
  text-align: center;
  z-index: 25;
  transition: opacity .16s ease, transform .16s ease;
}
.api-key-panel.emphasize .panel-tip .tooltip-arrow {
  position: absolute;
  top: 100%;
  left: 50%;
  width: 10px;
  height: 10px;
  background: var(--panel-3);
  border-left: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  transform: translateX(-50%) rotate(45deg);
}
.api-key-panel.emphasize:hover .panel-tip,
.api-key-panel.emphasize:focus-within .panel-tip {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}


/* Glowing blue around inputs */
.glow-blue {
  outline: none;
  border-color: #5e73ff !important;
  box-shadow:
    0 0 0 3px rgba(122,162,255,0.35),
    0 0 24px 6px rgba(122,162,255,0.18);
  transition: box-shadow .12s ease, border-color .12s ease;
  animation: glow-pulse 1.8s ease-in-out infinite; /* NEW: pulsate */
  will-change: box-shadow, border-color;          /* NEW: perf hint */
}


@keyframes glow-pulse {
  0%, 100% {
    border-color: #5e73ff;
    box-shadow:
      0 0 0 3px rgba(122,162,255,0.35),
      0 0 24px 6px rgba(122,162,255,0.18);
  }
  50% {
    border-color: #7da0ff;
    box-shadow:
      0 0 0 4px rgba(122,162,255,0.45),
      0 0 36px 12px rgba(122,162,255,0.30);
  }
}


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


.sessions { border-top: 1px dashed var(--border); padding-top: 10px; }
.sessions-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.sessions-actions { display: flex; gap: 6px; }
.session-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; max-height: 40vh; overflow: auto; }
.session-list li {
  display: flex; align-items: center; justify-content: space-between;
  gap: 8px; background: var(--panel-3); border: 1px solid var(--border);
  border-radius: 10px; padding: 8px 10px; cursor: pointer;
}
.session-title { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 180px; }
.session-list .actions { display: flex; gap: 6px; }
.session-list .icon-btn { background: transparent; border: 1px solid var(--border); color: var(--muted); border-radius: 6px; padding: 2px 6px; cursor: pointer; }
.session-list .icon-btn:hover { color: var(--text); }

.sidebar-footer {
  margin-top: auto;
  padding: 12px 14px 16px 14px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  display: grid; gap: 6px;
}
.endpoint {
  display: inline-block;
  background: var(--panel-3);
  border: 1px solid var(--border);
  padding: 4px 8px;
  border-radius: 6px;
  color: var(--muted);
}

.chat {
  display: grid;
  grid-template-rows: auto auto 1fr; 
  height: 100%;
  min-height: 0;
}
.chat-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 18px; border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(255,255,255,0.02), transparent);
}
.chat-title { font-weight: 700; letter-spacing: .2px; }
.status { color: var(--muted); font-size: 12px; }


.hero { padding: 14px 18px; border-bottom: 1px dashed var(--border); }
.hero-inner { background: linear-gradient(180deg, rgba(127,152,255,0.08), rgba(0,0,0,0)); border: 1px solid var(--border); border-radius: 12px; padding: 12px 14px; }
.hero .muted { color: var(--muted); }

.conversation {
  padding: 18px;
  padding-bottom: calc(var(--composer-h) + 16px); 
  overflow: auto;
  display: grid;
  gap: 18px;
  grid-auto-rows: max-content;
  min-height: 0;
}

.message-container {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 12px;
  align-items: flex-start;
  width: 100%;
}
.message-container.user .avatar { background: linear-gradient(180deg, #7aa2ff, #9f8cff); }
.message-container.assistant .avatar { background: linear-gradient(180deg, #4dd0a7, #3fb28f); }
.message-container .avatar {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  box-shadow: var(--shadow);
  display: grid;
  place-items: center;
  font-size: 18px;
  color: rgba(255,255,255,.95);
}

.message-container .message {
  background: var(--bubble-assistant);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 12px 14px;
  position: relative;
  width: 100%;
  max-width: 100%;
  min-width: 0;
}
.message-container.user .message { background: var(--bubble-user); }
.message-container.loading .message { opacity: .9; }

.message-content { white-space: pre-wrap; word-wrap: anywhere; min-width: 0; }
.message-content h1, .message-content h2, .message-content h3 { margin: 10px 0 6px 0; }
.message-content h1 { font-size: 20px; }
.message-content h2 { font-size: 18px; }
.message-content h3 { font-size: 16px; }
.message-content p { margin: 8px 0; }
.message-content ul, .message-content ol { padding-left: 20px; margin: 8px 0; }
.message-content code:not(pre code) {
  background: var(--panel-3); padding: 2px 6px; border-radius: 6px; border: 1px solid var(--border);
}
.message-content pre {
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: 12px;
  padding: 12px;
  overflow: auto;
  position: relative;
}
.copy-btn { position: absolute; top: 8px; right: 8px; background: var(--panel-3); border: 1px solid var(--border); font-size: 12px; border-radius: 8px; padding: 4px 8px; cursor: pointer; }

.message .sources-footer { margin-top: 10px; border-top: 1px dashed var(--border); padding-top: 8px; color: var(--muted); font-size: 12px; }
.message .sources-footer a { color: var(--link); text-decoration: none; }
.message .sources-footer a:hover { text-decoration: underline; }

.typing-indicator { display: inline-flex; gap: 6px; padding: 10px 0; align-items: center; }
.typing-indicator .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--muted); animation: blink 1.2s infinite ease-in-out; }
.typing-indicator .dot:nth-child(2){ animation-delay: .2s; }
.typing-indicator .dot:nth-child(3){ animation-delay: .4s; }
@keyframes blink { 0%, 80%, 100% { transform: translateY(0); opacity: .5; } 40% { transform: translateY(-2px); opacity: 1; } }


.sse-log-panel { margin: -8px 0 6px 52px; border: 1px dashed var(--border); border-radius: 12px; background: linear-gradient(180deg, rgba(127,152,255,0.06), rgba(0,0,0,0)); }
.sse-log-header { display: flex; align-items: center; justify-content: space-between; padding: 8px 10px; color: var(--muted); }
.sse-log-actions { display: flex; gap: 6px; }
.sse-log-actions .btn { font-size: 12px; padding: 4px 8px; }
.sse-log-scroller { max-height: 220px; overflow: auto; border-top: 1px dashed var(--border); }
.sse-log-stream { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace; font-size: 12px; line-height: 1.4; padding: 8px 10px; }
.log-line { display: grid; grid-template-columns: 84px 1fr; gap: 8px; padding: 3px 0; }
.log-line .evt { color: var(--accent); }
.log-line .evt.err { color: var(--danger); }
.log-line .evt.ok { color: var(--ok); }


.composer {
  position: fixed;
  left: var(--sidebar-w);
  right: 0;
  bottom: 0;
  z-index: 5;
  border-top: 1px solid var(--border);
  padding: 14px 16px;
  background: linear-gradient(180deg, rgba(20,22,27,0.98), rgba(20,22,27,0.98));
  backdrop-filter: blur(6px);
}
@supports (padding: max(0px)) {
  .composer { padding-bottom: max(14px, env(safe-area-inset-bottom)); }
}

.composer-inner { display: grid; grid-template-columns: 40px 1fr 100px; gap: 10px; align-items: end; }
#user-input {
  width: 100%; resize: none; min-height: 42px; max-height: 200px;
  padding: 10px 12px; border-radius: 12px; outline: none; color: var(--text);
  background: var(--panel-3); border: 1px solid var(--border);
}
.composer-hint { margin-top: 6px; color: var(--muted); font-size: 12px; }

.web-search-wait { display:flex; align-items:center; gap:10px; padding:6px 0; }
.web-search-wait .search-msg { color: var(--muted); }
.btn { background: var(--panel-3); border: 1px solid var(--border); color: var(--text); padding: 8px 12px; border-radius: 10px; cursor: pointer; }
.btn.small { padding: 6px 10px; font-size: 12px; }
.btn.primary { background: linear-gradient(180deg, #6f8bff, #5768ff); border-color: #5e73ff; }
.btn.danger { background: linear-gradient(180deg, #ff667f, #ff3f66); border-color: #ff3167; }
.btn.icon { width: 36px; height: 36px; display: grid; place-items: center; padding: 0; }
a { color: var(--link); }


.btn.ghost { background: transparent; border-color: var(--border); color: var(--muted); }
.btn.ghost:hover { color: var(--text); }
.btn.danger.ghost { background: transparent; color: #ff667f; border-color: #ff3167; }
.btn.danger.ghost:hover { background: rgba(255,49,103,.08); }


.api-key-panel.emphasize {
  margin: 16px 12px 20px;
  padding: 14px 12px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background:
    linear-gradient(180deg, rgba(255,213,106,0.25), transparent 65%),
    var(--panel-2);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.05),
    inset 0 6px 18px -12px rgba(0,0,0,0.40);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.api-key-panel.emphasize.tavily {
  background:
    linear-gradient(180deg, rgba(192,192,192,0.25), transparent 65%),
    var(--panel-2);
}
.api-key-panel h2 {
  font-size: 14px;
  margin: 0 0 6px;
  color: var(--text);
  cursor: pointer;
  position: relative;
  padding-right: 16px;
}

.api-key-panel h2::after {
  content: '▾';
  position: absolute;
  right: 0;
}

.api-key-panel.collapsed h2::after {
  content: '▸';
}

.api-key-panel.collapsed > :not(h2) {
  display: none;
}
.api-key-form .field { display: block; }
.api-key-input-wrap {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 6px;
}
#api-key-input,
#tavily-api-key-input {
  flex: 1 1 auto;
  min-width: 0;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font: inherit;
  background: var(--panel-3);
  color: var(--text);
  caret-color: var(--accent);
}
#api-key-input::placeholder,
#tavily-api-key-input::placeholder { color: rgba(154,164,178,0.7); }
#api-key-toggle-visibility.btn,
#tavily-api-key-toggle-visibility.btn {
  flex: 0 0 auto;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
  background: var(--panel-2);
  color: var(--muted);
}
#api-key-toggle-visibility.btn:hover,
#tavily-api-key-toggle-visibility.btn:hover { color: var(--text); }
.api-key-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
}

.status-pill {
  margin-left: auto;
  padding: 4px 8px;
  border-radius: 999px;
  font-size: 12px;
  line-height: 1;
  border: 1px solid transparent;
  background: var(--panel-3);
  color: var(--muted);
}
.status-pill.ok { background: rgba(11,110,52,0.2); color: var(--ok); border-color: rgba(11,110,52,0.33); }
.status-pill.warn { background: rgba(122,86,0,0.2); color: #fbbc04; border-color: rgba(122,86,0,0.33); }
.status-pill.danger { background: rgba(138,31,36,0.2); color: var(--danger); border-color: rgba(138,31,36,0.33); }


/*  Input lock overlay */

.composer[aria-disabled="true"] .composer-inner { opacity: .6; filter: saturate(.75); }
.composer-lock {
  position: absolute;
  inset: -6px -6px;
  display: none;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  font-size: 13px;
  color: rgba(240,243,249,0.70);
}
.composer[aria-disabled="true"] .composer-lock {
  display: flex;
  pointer-events: auto;
  background:
    linear-gradient(180deg, transparent, rgba(24,26,32,0.80) 40%, rgba(24,26,32,0.88));
  border-radius: 12px;
  border: 1px dashed rgba(154,164,178,0.28);
}


.toast-root {
  position: fixed;
  z-index: 9999;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}
.toast {
  pointer-events: auto;
  padding: 10px 12px;
  border-radius: 10px;
  background: rgba(240,243,249,0.92);
  color: #0e0f12;
  box-shadow: 0 10px 24px -14px rgba(0,0,0,.35), 0 3px 8px -6px rgba(0,0,0,.28);
  font-size: 14px;
  max-width: 72vw;
}
.toast.warn { background: #7a5600; color: #fff; }
.toast.error { background: #8a1f24; color: #fff; }
.toast.ok { background: #0b6e34; color: #fff; }


.muted.small { font-size: 12px; opacity: .7; }
code.endpoint { display: block; opacity: .7; font-size: 12px; padding: 2px 0; }

/* Mobile Sidebar & Hamburger */
#hamburger-btn {
  display: none; /* Hidden by default */
}

#sidebar-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 99;
  display: none;
  opacity: 0;
  transition: opacity 0.3s ease-in-out;
}

#sidebar-overlay.active {
  display: block;
  opacity: 1;
}

#mobile-api-key-modal,
#mobile-tavily-api-key-modal {
  display: none; /* Hidden by default, shown by JS on mobile */
}

#mobile-api-key-modal.visible,
#mobile-tavily-api-key-modal.visible {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

#mobile-api-key-modal .api-key-panel,
#mobile-tavily-api-key-modal .api-key-panel {
  max-width: 400px;
  width: 100%;
  margin: 0;
}

@media (min-width: 861px) {
  #mobile-api-key-modal,
  #mobile-tavily-api-key-modal {
    display: none !important;
  }
}

@media (max-width: 860px) {
  :root { --sidebar-w: 0px; }
  #app { grid-template-columns: 1fr; }
  
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    transform: translateX(-100%);
    transition: transform 0.3s ease-in-out;
    will-change: transform;
    display: flex;
    width: 300px;
  }

  .sidebar.open {
    transform: translateX(0);
  }

  #hamburger-btn {
    display: grid;
    place-items: center;
  }

  .chat-header {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 12px;
    align-items: center;
  }

  /* RESPONSIVE GRID COMPOSER FIX */
  .composer {
    left: 0; /* Extend into sidebar area */
    right: 0; /* Full viewport width */
  }

  /* Keep grid but make columns responsive */
  .composer-inner {
    display: grid;
    grid-template-columns: 36px 1fr 70px; /* Attach | Input | Button - optimized for mobile */
    gap: min(8px, 2vw);
    align-items: end;
  }

  /* Input spans full available width minus button space */
  #user-input {
    grid-column: 2; /* Second column (input area) */
    min-width: calc(100vw - 140px); /* Viewport minus button(70px) + attach(36px) + padding/gaps */
    max-width: calc(100vw - 110px); /* Conservative max to prevent overflow */
  }

  /* Button stays within its grid column */
  .composer-inner .btn {
    grid-column: 3; /* Third column (button area) */
    width: 100%; /* Fill allocated grid space */
    max-width: 70px;
    min-width: 60px; /* Touch-friendly minimum */
  }
  /* END RESPONSIVE GRID COMPOSER FIX */
}