/* ============================================
   HERMES GLASS — Glassmorphism Design System
   ============================================ */

:root {
  --glass-bg: rgba(255, 255, 255, 0.06);
  --glass-bg-hover: rgba(255, 255, 255, 0.10);
  --glass-bg-active: rgba(255, 255, 255, 0.14);
  --glass-border: rgba(255, 255, 255, 0.12);
  --glass-border-strong: rgba(255, 255, 255, 0.22);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  --glass-shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.2);

  --bg-dark: #0a0a1a;
  --bg-darker: #050510;
  --accent-cyan: #00f0ff;
  --accent-purple: #b026ff;
  --accent-pink: #ff2d95;
  --accent-blue: #4f46e5;
  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.65);
  --text-muted: rgba(255, 255, 255, 0.4);
  --success: #22c55e;
  --warning: #f59e0b;
  --error: #ef4444;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Fira Code', monospace;
}

/* Reset & Base */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  height: 100%;
  overflow: hidden;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-dark);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Animated Background */
#app {
  position: relative;
  width: 100%;
  height: 100vh;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.bg-gradient {
  position: fixed;
  inset: 0;
  z-index: 0;
  background: var(--bg-darker);
  overflow: hidden;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
  animation: float 20s ease-in-out infinite;
}

.orb-1 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--accent-cyan), transparent 70%);
  top: -10%;
  left: -10%;
  animation-delay: 0s;
}

.orb-2 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, var(--accent-purple), transparent 70%);
  bottom: -5%;
  right: -10%;
  animation-delay: -7s;
}

.orb-3 {
  width: 350px;
  height: 350px;
  background: radial-gradient(circle, var(--accent-pink), transparent 70%);
  top: 40%;
  left: 50%;
  animation-delay: -14s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25% { transform: translate(30px, -40px) scale(1.1); }
  50% { transform: translate(-20px, 20px) scale(0.95); }
  75% { transform: translate(40px, 30px) scale(1.05); }
}

/* Glass Base */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
}

/* Header */
.glass-header {
  position: relative;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: rgba(10, 10, 26, 0.6);
  backdrop-filter: blur(24px) saturate(160%);
  -webkit-backdrop-filter: blur(24px) saturate(160%);
  border-bottom: 1px solid var(--glass-border);
  flex-shrink: 0;
}

.header-left, .header-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.logo-icon {
  font-size: 22px;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 8px rgba(0, 240, 255, 0.3));
}

.logo-text {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.logo-accent {
  font-weight: 400;
  color: var(--text-secondary);
}

/* Buttons */
.glass-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 16px;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  outline: none;
  white-space: nowrap;
}

.glass-btn:hover {
  background: var(--glass-bg-hover);
  border-color: var(--glass-border-strong);
  transform: translateY(-1px);
}

.glass-btn:active {
  background: var(--glass-bg-active);
  transform: translateY(0);
}

.glass-btn.primary {
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.6), rgba(176, 38, 255, 0.4));
  border-color: rgba(176, 38, 255, 0.3);
}

.glass-btn.primary:hover {
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.7), rgba(176, 38, 255, 0.5));
  box-shadow: 0 4px 20px rgba(176, 38, 255, 0.25);
}

.glass-btn.secondary {
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(255, 255, 255, 0.08);
}

.glass-btn.icon-btn {
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: 50%;
  font-size: 18px;
}

.glass-btn.send-btn {
  width: 42px;
  height: 42px;
  padding: 0;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  border: none;
  box-shadow: 0 4px 16px rgba(0, 240, 255, 0.25);
}

.glass-btn.send-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 6px 24px rgba(0, 240, 255, 0.35);
}

.send-arrow {
  font-size: 16px;
  margin-left: 2px;
}

/* Session Tabs */
.session-tabs-container {
  position: relative;
  z-index: 10;
  padding: 8px 10px 0;
  flex-shrink: 0;
  background: rgba(10, 10, 26, 0.4);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--glass-border);
}

.tabs-scroll {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  overflow-y: hidden;
  padding-bottom: 8px;
  scrollbar-width: none;
  -ms-overflow-style: none;
  scroll-snap-type: x mandatory;
}

.tabs-scroll::-webkit-scrollbar {
  display: none;
}

.tab {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
  flex-shrink: 0;
  scroll-snap-align: start;
  position: relative;
  overflow: hidden;
}

.tab::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.2s ease;
  pointer-events: none;
}

.tab:hover {
  background: var(--glass-bg-hover);
  color: var(--text-primary);
}

.tab.active {
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.1), rgba(176, 38, 255, 0.08));
  border-color: rgba(0, 240, 255, 0.2);
  color: var(--text-primary);
  box-shadow: 0 4px 16px rgba(0, 240, 255, 0.1);
}

.tab.active::before {
  opacity: 1;
}

.tab-name {
  max-width: 100px;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tab-close {
  width: 18px;
  height: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-size: 12px;
  opacity: 0;
  transition: all 0.15s ease;
  cursor: pointer;
  color: var(--text-muted);
}

.tab:hover .tab-close,
.tab.active .tab-close {
  opacity: 1;
}

.tab-close:hover {
  background: rgba(239, 68, 68, 0.2);
  color: var(--error);
}

.tab-new {
  padding: 7px 10px;
  border-radius: var(--radius-md);
  border: 1px dashed var(--glass-border);
  background: transparent;
  color: var(--text-muted);
  font-size: 18px;
  cursor: pointer;
  transition: all 0.2s ease;
  flex-shrink: 0;
}

.tab-new:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  background: rgba(0, 240, 255, 0.05);
}

/* Chat Area */
.chat-area {
  position: relative;
  z-index: 5;
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 12px 14px;
  scroll-behavior: smooth;
}

.chat-area::-webkit-scrollbar {
  width: 4px;
}

.chat-area::-webkit-scrollbar-track {
  background: transparent;
}

.chat-area::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 4px;
}

/* Messages */
.message {
  display: flex;
  gap: 10px;
  margin-bottom: 14px;
  animation: messageIn 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes messageIn {
  from {
    opacity: 0;
    transform: translateY(12px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.message-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(8px);
}

.message.user .message-avatar {
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.2), rgba(79, 70, 229, 0.2));
  border-color: rgba(0, 240, 255, 0.3);
}

.message.assistant .message-avatar {
  background: linear-gradient(135deg, rgba(176, 38, 255, 0.2), rgba(255, 45, 149, 0.2));
  border-color: rgba(176, 38, 255, 0.3);
}

.message-content {
  flex: 1;
  min-width: 0;
}

.message-bubble {
  padding: 10px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  font-size: 14px;
  line-height: 1.55;
  word-wrap: break-word;
  position: relative;
}

.message.user .message-bubble {
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.08), rgba(79, 70, 229, 0.06));
  border-color: rgba(0, 240, 255, 0.15);
}

.message.assistant .message-bubble {
  background: linear-gradient(135deg, rgba(176, 38, 255, 0.06), rgba(255, 45, 149, 0.04));
  border-color: rgba(176, 38, 255, 0.12);
}

.message-meta {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 4px;
  padding-left: 2px;
}

.message-bubble code {
  font-family: var(--font-mono);
  background: rgba(0, 0, 0, 0.3);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 12px;
  color: var(--accent-cyan);
}

.message-bubble pre {
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 12px;
  overflow-x: auto;
  margin: 8px 0;
}

.message-bubble pre code {
  background: none;
  padding: 0;
  color: var(--text-primary);
}

/* Streaming cursor */
.streaming-cursor {
  display: inline-block;
  width: 2px;
  height: 16px;
  background: var(--accent-cyan);
  margin-left: 2px;
  animation: blink 1s step-end infinite;
  vertical-align: middle;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* Input Area */
.input-area {
  position: relative;
  z-index: 10;
  padding: 10px 14px calc(10px + env(safe-area-inset-bottom));
  background: rgba(10, 10, 26, 0.7);
  backdrop-filter: blur(24px) saturate(160%);
  -webkit-backdrop-filter: blur(24px) saturate(160%);
  border-top: 1px solid var(--glass-border);
  flex-shrink: 0;
}

.input-wrapper {
  display: flex;
  align-items: center;
  gap: 8px;
}

.text-input-glass {
  flex: 1;
  position: relative;
}

.text-input-glass input {
  width: 100%;
  padding: 10px 14px;
  border-radius: var(--radius-xl);
  border: 1px solid var(--glass-border);
  background: rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--text-primary);
  font-size: 15px;
  outline: none;
  transition: all 0.2s ease;
}

.text-input-glass input::placeholder {
  color: var(--text-muted);
}

.text-input-glass input:focus {
  border-color: rgba(0, 240, 255, 0.4);
  box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.08), inset 0 1px 2px rgba(0, 0, 0, 0.1);
}

.attach-btn {
  flex-shrink: 0;
}

/* Typing indicator */
.typing-indicator {
  display: none;
  align-items: center;
  gap: 3px;
  padding: 6px 14px;
  margin-top: 4px;
}

.typing-indicator.active {
  display: flex;
}

.typing-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-cyan);
  animation: typingBounce 1.4s ease-in-out infinite;
}

.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes typingBounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-6px); opacity: 1; }
}

/* Modals */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  animation: fadeIn 0.2s ease;
}

.modal-overlay.active {
  display: flex;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.glass-modal {
  width: 100%;
  max-width: 420px;
  max-height: 80vh;
  overflow-y: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--glass-border-strong);
  background: linear-gradient(180deg, rgba(20, 20, 45, 0.9), rgba(10, 10, 26, 0.95));
  backdrop-filter: blur(40px) saturate(200%);
  -webkit-backdrop-filter: blur(40px) saturate(200%);
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.1);
  animation: modalIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes modalIn {
  from {
    opacity: 0;
    transform: scale(0.9) translateY(20px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--glass-border);
}

.modal-header h3 {
  font-size: 16px;
  font-weight: 600;
}

.modal-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: none;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-secondary);
  font-size: 16px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.modal-close:hover {
  background: rgba(255, 255, 255, 0.12);
  color: var(--text-primary);
}

.modal-body {
  padding: 16px 20px;
}

.modal-footer {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  padding: 12px 20px 16px;
  border-top: 1px solid var(--glass-border);
}

/* Form elements */
.setting-group {
  margin-bottom: 16px;
}

.setting-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.glass-input-field {
  width: 100%;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--glass-border);
  background: rgba(0, 0, 0, 0.25);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--text-primary);
  font-size: 14px;
  font-family: inherit;
  outline: none;
  transition: all 0.2s ease;
}

.glass-input-field:focus {
  border-color: rgba(0, 240, 255, 0.4);
  box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.08);
}

.glass-input-field::placeholder {
  color: var(--text-muted);
}

textarea.glass-input-field {
  resize: vertical;
  min-height: 60px;
}

/* Toggle */
.toggle-group label {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
}

.toggle-group input {
  display: none;
}

.toggle-slider {
  position: relative;
  width: 44px;
  height: 24px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.15);
  transition: background 0.2s ease;
  flex-shrink: 0;
}

.toggle-slider::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
  transition: transform 0.2s ease;
}

.toggle-group input:checked + .toggle-slider {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
}

.toggle-group input:checked + .toggle-slider::after {
  transform: translateX(20px);
}

/* Preset chips */
.preset-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

.chip {
  padding: 6px 12px;
  border-radius: var(--radius-xl);
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.2s ease;
  user-select: none;
}

.chip:hover {
  background: var(--glass-bg-hover);
  border-color: var(--glass-border-strong);
}

.chip.active {
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.15), rgba(176, 38, 255, 0.1));
  border-color: rgba(0, 240, 255, 0.3);
  color: var(--text-primary);
}

/* Setting info */
.setting-info {
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--glass-border);
  font-size: 12px;
  color: var(--text-muted);
}

.setting-info p {
  margin-bottom: 4px;
}

/* Toast */
.toast-container {
  position: fixed;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  padding: 10px 18px;
  border-radius: var(--radius-md);
  border: 1px solid var(--glass-border);
  background: linear-gradient(135deg, rgba(20, 20, 45, 0.9), rgba(10, 10, 26, 0.95));
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  color: var(--text-primary);
  font-size: 13px;
  font-weight: 500;
  box-shadow: var(--glass-shadow);
  animation: toastIn 0.3s ease, toastOut 0.3s ease 2.7s forwards;
  pointer-events: auto;
}

.toast.success {
  border-color: rgba(34, 197, 94, 0.3);
  background: linear-gradient(135deg, rgba(34, 197, 94, 0.1), rgba(10, 10, 26, 0.95));
}

.toast.error {
  border-color: rgba(239, 68, 68, 0.3);
  background: linear-gradient(135deg, rgba(239, 68, 68, 0.1), rgba(10, 10, 26, 0.95));
}

.toast.warning {
  border-color: rgba(245, 158, 11, 0.3);
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.1), rgba(10, 10, 26, 0.95));
}

@keyframes toastIn {
  from { opacity: 0; transform: translateY(-12px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes toastOut {
  from { opacity: 1; transform: translateY(0); }
  to { opacity: 0; transform: translateY(-12px); }
}

/* Empty state */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  text-align: center;
  padding: 40px 20px;
}

.empty-state-icon {
  font-size: 48px;
  margin-bottom: 16px;
  opacity: 0.5;
}

.empty-state h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-secondary);
}

.empty-state p {
  font-size: 14px;
  color: var(--text-muted);
  max-width: 280px;
}

/* Scrollbar for modals */
.glass-modal::-webkit-scrollbar {
  width: 4px;
}

.glass-modal::-webkit-scrollbar-track {
  background: transparent;
}

.glass-modal::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
}

/* Tool call badge */
.tool-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  border-radius: 4px;
  background: rgba(0, 240, 255, 0.1);
  border: 1px solid rgba(0, 240, 255, 0.15);
  font-size: 11px;
  color: var(--accent-cyan);
  margin-bottom: 6px;
}

/* Responsive */
@media (max-width: 480px) {
  .glass-header {
    padding: 8px 10px;
  }

  .logo-text {
    font-size: 14px;
  }

  .session-tabs-container {
    padding: 6px 8px 0;
  }

  .tab {
    padding: 6px 10px;
    font-size: 12px;
  }

  .chat-area {
    padding: 10px;
  }

  .message-avatar {
    width: 28px;
    height: 28px;
    font-size: 12px;
  }

  .message-bubble {
    padding: 8px 11px;
    font-size: 13px;
  }

  .input-area {
    padding: 8px 10px calc(8px + env(safe-area-inset-bottom));
  }

  .glass-modal {
    max-height: 85vh;
  }
}

/* Desktop enhancements */
@media (min-width: 769px) {
  #app {
    max-width: 800px;
    margin: 0 auto;
    border-left: 1px solid var(--glass-border);
    border-right: 1px solid var(--glass-border);
  }

  .chat-area {
    padding: 16px 20px;
  }
}