/* Enhanced AgentFlow Pro Styles - Modern, Beautiful, and Feature-Rich */

:root {
  /* Color Palette - Light Mode */
  --primary-color: #14b8a6;         /* Vibrant teal */
  --primary-dark: #0e8074;          /* Deep teal */
  --primary-light: #5eead4;         /* Soft mint */
  --secondary-color: #f59e42;       /* Energetic orange */
  --secondary-dark: #c46611;        /* Rich orange brown */
  --accent-color: #3b82f6;          /* Bright blue accent */
  --success-color: #22c55e;         /* Green - Success */
  --warning-color: #eab308;         /* Yellow/Gold - Warning */
  --error-color: #ef4444;           /* Red - Error */

  /* Neutral Colors */
  --bg-primary: #f5f7fa;            /* Light warm */
  --bg-secondary: #e0e7ef;          /* Cooler, subtle blue-grey */
  --bg-tertiary: #d1d5db;           /* Pale gray */
  --text-primary: #23272e;          /* High contrast muted navy */
  --text-secondary: #475569;        /* Muted blue/gray */
  --text-muted: #6b7280;            /* Neutral gray */
  --border-color: #cbd5e1;          /* Soft blue-gray outline */
  --shadow-light: rgba(20, 184, 166, 0.10);    /* Soft teal highlight */
  --shadow-medium: rgba(20, 184, 166, 0.18);   /* Slightly stronger */
  --shadow-strong: rgba(59, 130, 246, 0.25);   /* Blue accent shadow */

  /* Layout */
  --sidebar-width: 320px;
  --header-height: 70px;
  --input-height: 120px;
  --border-radius: 16px;
  --border-radius-sm: 8px;
  --border-radius-lg: 24px;

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-family-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-black: 800;

  /* Animations */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
  --transition-slow: 0.35s ease;
  --animation-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
  --animation-smooth: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

[data-theme="dark"] {
  --bg-primary: #161f2a;             /* Deep navy background */
  --bg-secondary: #1f2937;           /* Charcoal blue */
  --bg-tertiary: #334155;            /* Blue-grey for card/areas */
  --text-primary: #f5f7fa;           /* Soft white */
  --text-secondary: #cbd5e1;         /* Muted white */
  --text-muted: #64748b;             /* Muted blue */
  --border-color: #334155;           /* Blue-grey outline */
  --shadow-light: rgba(20, 184, 166, 0.20);
  --shadow-medium: rgba(20, 184, 166, 0.35);
  --shadow-strong: rgba(59, 130, 246, 0.45);
}


/* Global Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

*::before,
*::after {
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: 1.6;
    color: var(--text-primary);
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    overflow-x: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 4px;
    transition: background var(--transition-fast);
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--secondary-dark));
}

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

.loading-content {
    text-align: center;
    color: white;
    animation: fadeInUp 0.8s var(--animation-smooth);
}

.loading-logo {
    margin-bottom: 2rem;
    animation: pulse 2s infinite;
}

.loading-content h2 {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: 0.5rem;
}

.loading-content p {
    font-size: var(--font-size-lg);
    opacity: 0.9;
    margin-bottom: 2rem;
}

.loading-bar {
    width: 200px;
    height: 4px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 2px;
    overflow: hidden;
    margin: 0 auto;
}

.loading-progress {
    width: 0%;
    height: 100%;
    background: white;
    border-radius: 2px;
    animation: loadingProgress 2s ease-out forwards;
}

/* App Container */
.app-container {
    display: grid;
    grid-template-areas:
        "nav nav"
        "sidebar main";
    grid-template-columns: var(--sidebar-width) 1fr;
    grid-template-rows: var(--header-height) 1fr;
    height: 100vh;
    transition: grid-template-columns var(--transition-normal);
}

.app-container.sidebar-collapsed {
    grid-template-columns: 0 1fr;
}

/* Top Navigation */
.top-nav {
    grid-area: nav;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    backdrop-filter: blur(10px);
    position: relative;
    z-index: 1000;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
}

.nav-brand i {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 1.5rem;
}

.version-badge {
    font-size: var(--font-size-xs);
    background: var(--accent-color);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: var(--border-radius-sm);
    font-weight: var(--font-weight-medium);
}

.nav-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-btn {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: var(--border-radius);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.nav-btn:hover {
    background: var(--border-color);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--shadow-light);
}

.nav-btn:active {
    transform: translateY(0);
}

.nav-btn.active {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

/* Sidebar */
.sidebar {
    grid-area: sidebar;
    background: var(--bg-primary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: transform var(--transition-normal);
}

.sidebar-collapsed .sidebar {
    transform: translateX(-100%);
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-header h3 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.btn-new-chat {
    width: 100%;
    padding: 0.75rem 1rem;
    border: none;
    border-radius: var(--border-radius);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-new-chat:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.conversation-list {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
}

.conversation-item {
    padding: 0.75rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    margin-bottom: 0.5rem;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

.conversation-item:hover {
    background: var(--bg-secondary);
    border-color: var(--border-color);
}

.conversation-item.active {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.conversation-title {
    font-weight: var(--font-weight-medium);
    margin-bottom: 0.25rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.conversation-preview {
    font-size: var(--font-size-sm);
    opacity: 0.7;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.conversation-time {
    font-size: var(--font-size-xs);
    opacity: 0.6;
    margin-top: 0.25rem;
}

.sidebar-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.usage-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.stat-item {
    text-align: center;
    padding: 0.75rem;
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
}

.stat-label {
    display: block;
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.stat-value {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--primary-color);
}

/* Main Content */
.main-content {
    grid-area: main;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Chat Header */
.chat-header {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.chat-info h1 {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.chat-info p {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.chat-actions {
    display: flex;
    gap: 0.5rem;
}

.action-btn {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: var(--border-radius);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

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

/* Messages Container */
.messages-container {
    flex: 1;
    overflow-y: auto;
    position: relative;
}

/* Welcome Screen */
.welcome-screen {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    padding: 2rem;
}

.welcome-content {
    text-align: center;
    max-width: 800px;
}

.welcome-icon {
    margin-bottom: 2rem;
    color: var(--primary-color);
    animation: float 3s ease-in-out infinite;
}

.welcome-content h2 {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.welcome-content > p {
    font-size: var(--font-size-lg);
    color: var(--text-muted);
    margin-bottom: 3rem;
}

.capability-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.capability-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 2rem 1.5rem;
    text-align: center;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.capability-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
    transition: left 0.6s ease;
}

.capability-card:hover::before {
    left: 100%;
}

.capability-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px var(--shadow-light);
    border-color: var(--primary-color);
}

.capability-card i {
    font-size: 2.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
    display: block;
}

.capability-card h3 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.capability-card p {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.quick-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
}

.quick-action {
    padding: 0.75rem 1.5rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.quick-action:hover {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

/* Messages */
.messages {
    padding: 2rem;
    max-width: 1000px;
    margin: 0 auto;
    width: 100%;
}

.message {
    margin-bottom: 2rem;
    animation: messageSlideIn 0.5s var(--animation-smooth);
}

.message-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-weight-bold);
    flex-shrink: 0;
}

.message-avatar.user {
    background: linear-gradient(135deg, var(--accent-color), var(--primary-color));
    color: white;
}

.message-avatar.assistant {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    color: white;
}

.message-avatar.system {
    background: linear-gradient(135deg, var(--success-color), var(--accent-color));
    color: white;
}

.message-info {
    flex: 1;
}

.message-sender {
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.message-time {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

.message-actions {
    display: flex;
    gap: 0.5rem;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.message:hover .message-actions {
    opacity: 1;
}

.message-action {
    width: 30px;
    height: 30px;
    border: none;
    border-radius: var(--border-radius-sm);
    background: var(--bg-secondary);
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.message-action:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

.message-content {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 1.5rem;
    position: relative;
    box-shadow: 0 2px 10px var(--shadow-light);
    transition: all var(--transition-fast);
}

.message-content:hover {
    box-shadow: 0 8px 30px var(--shadow-medium);
}

.message.user .message-content {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
}

.message.assistant .message-content {
    background: var(--bg-primary);
    border-left: 4px solid var(--primary-color);
}

.message.system .message-content {
    background: var(--bg-secondary);
    border-left: 4px solid var(--success-color);
    font-family: var(--font-family-mono);
    font-size: var(--font-size-sm);
}

/* Code Blocks */
pre {
    background: #1e293b !important;
    border-radius: var(--border-radius);
    padding: 1.5rem;
    overflow-x: auto;
    margin: 1rem 0;
    border: 1px solid var(--border-color);
}

code {
    font-family: var(--font-family-mono);
    font-size: 0.9em;
    background: var(--bg-secondary);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    color: var(--text-primary);
}

pre code {
    background: transparent;
    padding: 0;
    color: #e2e8f0;
}

/* Input Area */
.input-area {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: 1.5rem 2rem;
    position: relative;
}

.file-drop-zone {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(102, 126, 234, 0.1);
    border: 2px dashed var(--primary-color);
    border-radius: var(--border-radius-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 10;
}

.file-drop-zone.active {
    opacity: 1;
    visibility: visible;
}

.file-drop-zone i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.file-drop-zone p {
    color: var(--primary-color);
    font-weight: var(--font-weight-medium);
}

.input-container {
    max-width: 1000px;
    margin: 0 auto;
}

.input-wrapper {
    display: flex;
    align-items: flex-end;
    gap: 0.75rem;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 0.75rem 1rem;
    transition: all var(--transition-fast);
}

.input-wrapper:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.input-btn {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: var(--border-radius);
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.input-btn:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

.voice-btn.active {
    background: var(--error-color);
    color: white;
    animation: pulse 2s infinite;
}

#user-input {
    flex: 1;
    border: none;
    outline: none;
    background: transparent;
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.5;
    resize: none;
    min-height: 40px;
    max-height: 200px;
    padding: 0.5rem;
}

#user-input::placeholder {
    color: var(--text-muted);
}

.input-actions {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.send-btn {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: var(--border-radius);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.send-btn:hover:not(:disabled) {
    transform: scale(1.05);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.send-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.input-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 0.75rem;
}

.character-count {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

.typing-indicator {
    display: none;
    align-items: center;
    gap: 0.5rem;
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

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

.typing-dots {
    display: flex;
    gap: 2px;
}

.typing-dots span {
    width: 4px;
    height: 4px;
    background: var(--primary-color);
    border-radius: 50%;
    animation: typingDot 1.4s infinite ease-in-out both;
}

.typing-dots span:nth-child(1) { animation-delay: -0.32s; }
.typing-dots span:nth-child(2) { animation-delay: -0.16s; }

/* Modal Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    backdrop-filter: blur(5px);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 25px 50px var(--shadow-strong);
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow: hidden;
    transform: scale(0.9);
    transition: transform var(--transition-normal);
}

.modal.active .modal-content {
    transform: scale(1);
}

.modal-header {
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h2 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
}

.modal-close {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: var(--border-radius);
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.modal-body {
    padding: 2rem;
    overflow-y: auto;
    max-height: 60vh;
}

.settings-tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

.tab-btn {
    padding: 0.75rem 1.5rem;
    border: none;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all var(--transition-fast);
    font-weight: var(--font-weight-medium);
}

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

.tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    transition: all var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.input-with-icon {
    position: relative;
}

.toggle-visibility {
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
}

.toggle-visibility:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

.form-range {
    width: 100%;
    height: 6px;
    background: var(--border-color);
    border-radius: 3px;
    outline: none;
    -webkit-appearance: none;
}

.form-range::-webkit-slider-thumb {
    appearance: none;
    width: 20px;
    height: 20px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
    transition: transform var(--transition-fast);
}

.form-range::-webkit-slider-thumb:hover {
    transform: scale(1.1);
}

.range-value {
    font-weight: var(--font-weight-medium);
    color: var(--primary-color);
    margin-left: 1rem;
}

.radio-group {
    display: flex;
    gap: 1rem;
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-weight: var(--font-weight-normal);
}

.radio-label input[type="radio"] {
    margin: 0;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    font-weight: var(--font-weight-normal);
}

.checkbox-label input[type="checkbox"] {
    margin: 0;
    width: 18px;
    height: 18px;
}

.modal-footer {
    padding: 1.5rem 2rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
}

.btn {
    padding: 0.75rem 1.5rem;
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-color: var(--border-color);
}

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

.btn-danger {
    background: var(--error-color);
    color: white;
}

.btn-danger:hover {
    background: #e74c3c;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 107, 107, 0.4);
}

/* Performance Monitor */
.performance-monitor {
    position: fixed;
    top: 100px;
    right: 2rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: 0 8px 30px var(--shadow-light);
    z-index: 1500;
    opacity: 0;
    visibility: hidden;
    transform: translateX(100%);
    transition: all var(--transition-normal);
    min-width: 200px;
}

.performance-monitor.active {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
}

.perf-header {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.perf-header h4 {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin: 0;
}

.perf-toggle {
    width: 30px;
    height: 30px;
    border: none;
    border-radius: var(--border-radius-sm);
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.perf-toggle:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.perf-metrics {
    padding: 1rem;
}

.metric {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
}

.metric:last-child {
    border-bottom: none;
}

.metric-label {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

.metric-value {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--primary-color);
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 2rem;
    right: 2rem;
    z-index: 3000;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.toast {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1rem 1.5rem;
    box-shadow: 0 8px 30px var(--shadow-light);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-width: 300px;
    transform: translateX(100%);
    animation: toastSlideIn 0.3s var(--animation-smooth) forwards;
    position: relative;
    overflow: hidden;
}

.toast::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--primary-color);
}

.toast.success::before { background: var(--success-color); }
.toast.warning::before { background: var(--warning-color); }
.toast.error::before { background: var(--error-color); }

.toast-icon {
    flex-shrink: 0;
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.toast-message {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.toast-close {
    width: 24px;
    height: 24px;
    border: none;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.toast-close:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

/* Context Menu */
.context-menu {
    position: fixed;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: 0 8px 30px var(--shadow-medium);
    padding: 0.5rem 0;
    z-index: 2500;
    opacity: 0;
    visibility: hidden;
    transform: scale(0.95);
    transition: all var(--transition-fast);
    min-width: 150px;
}

.context-menu.active {
    opacity: 1;
    visibility: visible;
    transform: scale(1);
}

.context-item {
    padding: 0.75rem 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.context-item:hover {
    background: var(--bg-secondary);
}

.context-item i {
    width: 16px;
    color: var(--text-muted);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .app-container {
        grid-template-areas:
            "nav"
            "main";
        grid-template-columns: 1fr;
        grid-template-rows: var(--header-height) 1fr;
    }

    .sidebar {
        position: fixed;
        top: var(--header-height);
        left: 0;
        bottom: 0;
        width: var(--sidebar-width);
        z-index: 1200;
        transform: translateX(-100%);
        transition: transform var(--transition-normal);
    }

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

    .capability-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 1rem;
    }

    .quick-actions {
        flex-direction: column;
        align-items: stretch;
    }
}

@media (max-width: 768px) {
    :root {
        --sidebar-width: 280px;
    }

    .top-nav {
        padding: 0 1rem;
    }

    .chat-header {
        padding: 1rem;
        flex-direction: column;
        gap: 1rem;
    }

    .input-area {
        padding: 1rem;
    }

    .messages {
        padding: 1rem;
    }

    .modal-content {
        width: 95%;
        margin: 1rem;
    }

    .modal-body {
        padding: 1rem;
    }

    .performance-monitor {
        right: 1rem;
        min-width: 180px;
    }

    .toast-container {
        right: 1rem;
        left: 1rem;
    }

    .toast {
        min-width: auto;
    }
}

@media (max-width: 480px) {
    .welcome-content h2 {
        font-size: var(--font-size-2xl);
    }

    .capability-grid {
        grid-template-columns: 1fr;
    }

    .input-wrapper {
        flex-direction: column;
        gap: 0.5rem;
    }

    .input-actions {
        align-self: stretch;
        justify-content: flex-end;
    }
}

/* Print Styles */
@media print {
    .top-nav,
    .sidebar,
    .input-area,
    .chat-actions,
    .message-actions,
    .modal,
    .toast-container,
    .context-menu,
    .performance-monitor {
        display: none !important;
    }

    .app-container {
        grid-template-areas: "main";
        grid-template-columns: 1fr;
        grid-template-rows: 1fr;
    }

    .main-content {
        height: auto;
        overflow: visible;
    }

    .messages-container {
        height: auto;
        overflow: visible;
    }

    .message-content {
        break-inside: avoid;
        box-shadow: none !important;
        border: 1px solid #ccc !important;
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes loadingProgress {
    0% { width: 0%; }
    50% { width: 70%; }
    100% { width: 100%; }
}

@keyframes pulse {
    0%, 100% { 
        opacity: 1; 
        transform: scale(1);
    }
    50% { 
        opacity: 0.8; 
        transform: scale(0.95);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

@keyframes typingDot {
    0%, 80%, 100% {
        transform: scale(0);
    }
    40% {
        transform: scale(1);
    }
}

@keyframes toastSlideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes shimmer {
    0% {
        background-position: -200px 0;
    }
    100% {
        background-position: 200px 0;
    }
}

/* Accessibility Improvements */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus Styles for Keyboard Navigation */
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    :root {
        --border-color: #000000;
        --shadow-light: rgba(0, 0, 0, 0.5);
        --shadow-medium: rgba(0, 0, 0, 0.7);
        --shadow-strong: rgba(0, 0, 0, 0.9);
    }
}

/* Utility Classes */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.d-none { display: none !important; }
.d-block { display: block !important; }
.d-flex { display: flex !important; }
.d-grid { display: grid !important; }

.opacity-0 { opacity: 0; }
.opacity-50 { opacity: 0.5; }
.opacity-100 { opacity: 1; }

.pointer-events-none { pointer-events: none; }
.cursor-pointer { cursor: pointer; }
.cursor-not-allowed { cursor: not-allowed; }

/* Component-specific animations */
.message-content.highlight {
    animation: highlight 2s ease-out;
}

@keyframes highlight {
    0% { background-color: rgba(102, 126, 234, 0.2); }
    100% { background-color: transparent; }
}

/* Loading states */
.loading {
    position: relative;
    overflow: hidden;
}

.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    animation: shimmer 1.5s infinite;
}

/* Enhanced form elements */
.form-control.error {
    border-color: var(--error-color);
    box-shadow: 0 0 0 3px rgba(255, 107, 107, 0.1);
}

.form-control.success {
    border-color: var(--success-color);
    box-shadow: 0 0 0 3px rgba(0, 212, 170, 0.1);
}

.error-message {
    font-size: var(--font-size-xs);
    color: var(--error-color);
    margin-top: 0.25rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.success-message {
    font-size: var(--font-size-xs);
    color: var(--success-color);
    margin-top: 0.25rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}