:root {
    --bg: #0e1117;
    --panel: #111827;
    --accent: #22c55e;
    --accent-2: #16a34a;
    --text: #e5e7eb;
    --muted: #9ca3af;
    --ai: #1f2937;
    --user: #0b5ed7;
    --shadow: 0 10px 30px rgba(0,0,0,.35);
    --ai-gradient: linear-gradient(135deg, #1f2937 0%, #374151 100%);
    --user-gradient: linear-gradient(135deg, #0b5ed7 0%, #0d6efd 100%);
}

body {
    background: radial-gradient(1200px 600px at 10% -10%, #1f2937 0, #0e1117 50%);
    color: var(--text);
    font-family: 'Nunito', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    margin: 0;
    padding: 0;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Name Gate Styles */
.gate {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    backdrop-filter: blur(10px);
}

.gate .panel {
    width: min(520px, 92vw);
    background: var(--panel);
    border: 1px solid rgba(255,255,255,.12);
    border-radius: 20px;
    padding: 30px;
    box-shadow: var(--shadow);
    animation: slideInUp 0.5s ease-out;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.badge-free {
    background: rgba(34,197,94,.14);
    color: #86efac;
    border: 1px solid rgba(34,197,94,.35);
}

.select, select, input {
    background: #0f172a;
    color: var(--text);
    border: 1px solid rgba(255,255,255,.12);
    transition: all 0.3s ease;
}

.select:focus, select:focus, input:focus {
    background: #0f172a;
    color: var(--text);
    border-color: var(--accent);
    box-shadow: 0 0 0 0.2rem rgba(34, 197, 94, 0.25);
    transform: translateY(-1px);
}

/* Main App Styles */
.app {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

.card {
    background: linear-gradient(180deg, rgba(255,255,255,0.06), rgba(255,255,255,0.02));
    border: 1px solid rgba(255,255,255,0.08);
    backdrop-filter: blur(6px);
    box-shadow: var(--shadow);
    color: var(--text);
    height: 100vh;
    display: flex;
    flex-direction: column;
    border-radius: 0;
}

/* Header */
.card .p-3 {
    background: rgba(255,255,255,0.03);
    border-bottom: 1px solid rgba(255,255,255,0.08);
    backdrop-filter: blur(10px);
}

/* Chat Wrap */
.chat-wrap {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    scroll-behavior: smooth;
    background: linear-gradient(180deg, rgba(15, 23, 42, 0.3) 0%, rgba(15, 23, 42, 0.1) 100%);
}

/* Message Styles */
.msg {
    display: flex;
    gap: 16px;
    margin: 24px 0;
    animation: fadeInUp 0.4s ease-out;
    position: relative;
}

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

.msg .avatar {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #0b1220;
    border: 1px solid rgba(255,255,255,0.08);
    font-size: 18px;
    flex-shrink: 0;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

.msg.user .avatar {
    background: var(--user-gradient);
    border-color: rgba(13, 110, 253, 0.3);
}

.msg.ai .avatar {
    background: var(--ai-gradient);
    border-color: rgba(34, 197, 94, 0.3);
}

.bubble {
    max-width: 85%;
    padding: 16px 20px;
    border-radius: 18px;
    border: 1px solid rgba(255,255,255,0.08);
    line-height: 1.6;
    position: relative;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    transition: all 0.3s ease;
}

.bubble:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.3);
}

.ai .bubble {
    background: var(--ai-gradient);
    border-color: rgba(34, 197, 94, 0.2);
    border-bottom-left-radius: 6px;
}

.user .bubble {
    background: var(--user-gradient);
    border-color: rgba(13, 110, 253, 0.3);
    border-bottom-right-radius: 6px;
    margin-left: auto;
}

/* Enhanced AI Response Styling */
.ai .bubble {
    position: relative;
    overflow: hidden;
}

.ai .bubble::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(34, 197, 94, 0.5), transparent);
}

.ai .bubble h1, .ai .bubble h2, .ai .bubble h3, .ai .bubble h4, .ai .bubble h5, .ai .bubble h6 {
    color: #86efac;
    margin-top: 0;
    margin-bottom: 12px;
    font-weight: 600;
}

.ai .bubble p {
    margin-bottom: 12px;
}

.ai .bubble code {
    background: rgba(0,0,0,0.3);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    color: #fbbf24;
}

.ai .bubble pre {
    background: rgba(0,0,0,0.4);
    padding: 16px;
    border-radius: 8px;
    overflow-x: auto;
    border: 1px solid rgba(255,255,255,0.1);
    margin: 12px 0;
}

.ai .bubble pre code {
    background: none;
    padding: 0;
    color: #e5e7eb;
}

.ai .bubble ul, .ai .bubble ol {
    padding-left: 20px;
    margin: 12px 0;
}

.ai .bubble li {
    margin-bottom: 6px;
}

.ai .bubble blockquote {
    border-left: 4px solid var(--accent);
    padding-left: 16px;
    margin: 12px 0;
    font-style: italic;
    color: #d1d5db;
}

.ai .bubble table {
    width: 100%;
    border-collapse: collapse;
    margin: 12px 0;
    background: rgba(0,0,0,0.2);
    border-radius: 8px;
    overflow: hidden;
}

.ai .bubble th, .ai .bubble td {
    padding: 8px 12px;
    text-align: left;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.ai .bubble th {
    background: rgba(34, 197, 94, 0.1);
    color: #86efac;
    font-weight: 600;
}

.meta {
    font-size: 11px;
    color: var(--muted);
    margin-top: 8px;
    opacity: 0.8;
    font-weight: 500;
}

/* Tools Bar */
.tools {
    border-top: 1px solid rgba(255,255,255,.08);
    padding: 12px 20px;
    display: flex;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
    background: rgba(255,255,255,0.02);
    backdrop-filter: blur(10px);
}

/* Input Bar */
.input-bar {
    border-top: 1px solid rgba(255,255,255,.08);
    gap: 12px;
    padding: 20px;
    display: flex;
    align-items: flex-end;
    background: rgba(255,255,255,.02);
    backdrop-filter: blur(10px);
}

.input-bar textarea {
    resize: none;
    width: 100%;
    background: #0f172a;
    color: var(--text);
    border: 1px solid rgba(255,255,255,.12);
    border-radius: 12px;
    padding: 16px;
    min-height: 52px;
    max-height: 150px;
    outline: none;
    font-size: 14px;
    line-height: 1.5;
    transition: all 0.3s ease;
}

.input-bar textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 0.2rem rgba(34, 197, 94, 0.25);
    transform: translateY(-1px);
}

.input-bar textarea::placeholder {
    color: #6b7280;
}

/* Buttons */
.btn-success {
    background: var(--user-gradient);
    border: none;
    border-radius: 12px;
    padding: 12px 20px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(13, 110, 253, 0.3);
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(13, 110, 253, 0.4);
    filter: brightness(1.1);
}

.btn-outline-light {
    border: 1px solid rgba(255,255,255,0.2);
    background: rgba(255,255,255,0.05);
    transition: all 0.3s ease;
}

.btn-outline-light:hover {
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.3);
    transform: translateY(-1px);
}

/* Typing Indicator */
.typing {
    display: inline-flex;
    gap: 6px;
    align-items: center;
    padding: 8px 12px;
    border-radius: 12px;
    background: rgba(255,255,255,.05);
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #86efac;
    opacity: .6;
    animation: blink 1.3s infinite;
}

.dot:nth-child(2) {
    animation-delay: .2s;
}

.dot:nth-child(3) {
    animation-delay: .4s;
}

@keyframes blink {
    0%, 80%, 100% {
        transform: translateY(0);
        opacity: .4;
    }
    40% {
        transform: translateY(-4px);
        opacity: 1;
    }
}

/* Utility Classes */
.small-muted {
    color: var(--muted);
    font-size: 12px;
}

a, a:visited {
    color: #a5b4fc;
}

/* Responsive Design */
@media (max-width: 768px) {
    .app {
        height: 100vh;
        margin: 0;
    }
    
    .card {
        border-radius: 0;
        height: 100vh;
    }
    
    .chat-wrap {
        padding: 16px;
    }
    
    .bubble {
        max-width: 92%;
        padding: 14px 16px;
    }
    
    .msg {
        gap: 12px;
        margin: 16px 0;
    }
    
    .msg .avatar {
        width: 36px;
        height: 36px;
        font-size: 16px;
    }
    
    .input-bar {
        padding: 16px;
    }
    
    .tools {
        padding: 10px 16px;
    }
    
    .gate .panel {
        width: 95vw;
        margin: 20px;
        padding: 24px;
    }
}

@media (max-width: 480px) {
    .bubble {
        max-width: 95%;
        padding: 12px 14px;
    }
    
    .msg {
        gap: 8px;
    }
    
    .msg .avatar {
        width: 32px;
        height: 32px;
        font-size: 14px;
    }
    
    .input-bar textarea {
        padding: 12px;
        font-size: 16px; /* Prevents zoom on iOS */
    }
}

/* Scrollbar Styling */
.chat-wrap::-webkit-scrollbar {
    width: 6px;
}

.chat-wrap::-webkit-scrollbar-track {
    background: rgba(255,255,255,.05);
    border-radius: 3px;
}

.chat-wrap::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,.2);
    border-radius: 3px;
}

.chat-wrap::-webkit-scrollbar-thumb:hover {
    background: rgba(255,255,255,.3);
}

/* Loading Animation */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.loading {
    animation: pulse 2s infinite;
}

/* Enhanced Focus States */
*:focus {
    outline: none;
}

*:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* Notification System */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--panel);
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: 12px;
    padding: 16px 20px;
    color: var(--text);
    font-size: 14px;
    font-weight: 500;
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
    z-index: 10000;
    display: flex;
    align-items: center;
    gap: 12px;
    transform: translateX(400px);
    transition: transform 0.3s ease;
    max-width: 350px;
}

.notification.show {
    transform: translateX(0);
}

.notification-success {
    border-color: rgba(34, 197, 94, 0.3);
    background: linear-gradient(135deg, rgba(34, 197, 94, 0.1), rgba(34, 197, 94, 0.05));
}

.notification-error {
    border-color: rgba(239, 68, 68, 0.3);
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.1), rgba(239, 68, 68, 0.05));
}

.notification-info {
    border-color: rgba(59, 130, 246, 0.3);
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(59, 130, 246, 0.05));
}

.notification i {
    font-size: 18px;
}

.notification-success i {
    color: #22c55e;
}

.notification-error i {
    color: #ef4444;
}

.notification-info i {
    color: #3b82f6;
}