:root {
    --bg-app: #0b0c10;
    --bg-sidebar: #12131c;
    --bg-chat: #0e0f17;
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --text-primary: #f5f6fa;
    --text-secondary: #a0a5c1;
    --accent-color: #8a2be2;
    --accent-glow: rgba(138, 43, 226, 0.4);
    --bubble-user: rgba(138, 43, 226, 0.15);
    --bubble-assistant: rgba(255, 255, 255, 0.04);
    --font-sans: 'Inter', sans-serif;
    --font-heading: 'Outfit', sans-serif;
}

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

body {
    background: radial-gradient(circle at 50% 50%, #1a0f30 0%, var(--bg-app) 70%);
    color: var(--text-primary);
    font-family: var(--font-sans);
    height: 100vh;
    overflow: hidden;
    line-height: 1.6;
}

.app-container {
    display: flex;
    height: 100vh;
    width: 100vw;
}

/* Sidebar Styles */
.sidebar {
    width: 320px;
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--glass-border);
    display: flex;
    flex-direction: column;
    z-index: 10;
    flex-shrink: 0;
}

.sidebar-header {
    padding: 24px;
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-heading);
    font-size: 22px;
    font-weight: 800;
    color: var(--text-primary);
}

.logo-icon {
    color: var(--accent-color);
    filter: drop-shadow(0 0 8px var(--accent-glow));
}

.btn {
    border: none;
    border-radius: 12px;
    cursor: pointer;
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-color) 0%, #6a1b9a 100%);
    color: white;
    padding: 12px 16px;
    box-shadow: 0 4px 15px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(138, 43, 226, 0.6);
}

.btn-new-chat {
    width: 100%;
}

.chat-history {
    flex: 1;
    overflow-y: auto;
    padding: 16px 12px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.chat-item {
    padding: 12px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all 0.2s ease;
    background: transparent;
    border: 1px solid transparent;
}

.chat-item:hover, .chat-item.active {
    background: var(--glass-bg);
    color: var(--text-primary);
    border-color: var(--glass-border);
}

.chat-item i {
    font-size: 14px;
    color: var(--accent-color);
}

.chat-item-title {
    font-size: 14px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
}

.sidebar-footer {
    padding: 24px;
    border-top: 1px solid var(--glass-border);
    background: rgba(0, 0, 0, 0.2);
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.settings-header {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.settings-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.settings-group label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    font-weight: 700;
}

.settings-group textarea {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    color: var(--text-primary);
    padding: 8px 12px;
    font-family: var(--font-sans);
    font-size: 13px;
    resize: none;
    outline: none;
    transition: border-color 0.2s;
}

.settings-group textarea:focus {
    border-color: var(--accent-color);
}

.slider-header {
    display: flex;
    justify-content: space-between;
    font-size: 11px;
    text-transform: uppercase;
    color: var(--text-secondary);
    font-weight: 700;
}

.settings-group input[type="range"] {
    accent-color: var(--accent-color);
    height: 4px;
    background: var(--glass-border);
    border-radius: 2px;
    outline: none;
}

/* Chat Area Styles */
.chat-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-chat);
    position: relative;
}

.chat-header {
    height: 70px;
    padding: 0 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--glass-border);
    background: rgba(14, 15, 23, 0.8);
    backdrop-filter: blur(10px);
    z-index: 5;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 2px;
}

.pulse-dot {
    width: 8px;
    height: 8px;
    background-color: #00e676;
    border-radius: 50%;
    box-shadow: 0 0 8px #00e676;
    display: inline-block;
}

.status-text {
    font-size: 11px;
    color: #00e676;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.model-name {
    font-family: var(--font-heading);
    font-size: 18px;
    font-weight: 700;
}

.btn-icon {
    background: transparent;
    color: var(--text-secondary);
    width: 40px;
    height: 40px;
    border-radius: 50%;
}

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

/* Messages Container */
.messages-container {
    flex: 1;
    overflow-y: auto;
    padding: 32px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.welcome-screen {
    max-width: 600px;
    margin: 80px auto 0 auto;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.welcome-logo {
    width: 70px;
    height: 70px;
    border-radius: 20px;
    background: linear-gradient(135deg, var(--accent-color) 0%, #6a1b9a 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    box-shadow: 0 10px 25px var(--accent-glow);
    animation: pulseLogo 3s infinite alternate;
}

.welcome-screen h2 {
    font-family: var(--font-heading);
    font-size: 28px;
    font-weight: 800;
}

.welcome-screen p {
    color: var(--text-secondary);
    font-size: 15px;
}

.suggested-prompts {
    display: flex;
    gap: 12px;
    margin-top: 16px;
    flex-wrap: wrap;
    justify-content: center;
}

.suggest-btn {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 12px 18px;
    color: var(--text-secondary);
    font-family: var(--font-sans);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s;
}

.suggest-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--accent-color);
    color: var(--text-primary);
    transform: translateY(-1px);
}

/* Message Bubbles */
.message-row {
    display: flex;
    width: 100%;
}

.message-row.user {
    justify-content: flex-end;
}

.message-row.assistant {
    justify-content: flex-start;
}

.message-bubble {
    max-width: 75%;
    padding: 16px 20px;
    border-radius: 16px;
    font-size: 15px;
    position: relative;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

.message-row.user .message-bubble {
    background: var(--bubble-user);
    color: var(--text-primary);
    border-bottom-right-radius: 4px;
    border: 1px solid rgba(138, 43, 226, 0.3);
}

.message-row.assistant .message-bubble {
    background: var(--bubble-assistant);
    color: var(--text-primary);
    border-bottom-left-radius: 4px;
    border: 1px solid var(--glass-border);
}

/* Typing Indicator */
.typing-indicator {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 0;
}

.typing-dot {
    width: 8px;
    height: 8px;
    background-color: var(--text-secondary);
    border-radius: 50%;
    animation: typingBounce 1.4s infinite ease-in-out;
}

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

/* Markdown Styling inside Bubbles */
.message-bubble p {
    margin-bottom: 12px;
}
.message-bubble p:last-child {
    margin-bottom: 0;
}

.message-bubble pre {
    background: #1e1e24 !important;
    border-radius: 8px;
    margin: 12px 0;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.message-bubble code {
    font-family: 'Courier New', Courier, monospace;
    font-size: 14px;
    background: rgba(255, 255, 255, 0.08);
    padding: 2px 6px;
    border-radius: 4px;
}

.message-bubble pre code {
    background: transparent;
    padding: 0;
    border-radius: 0;
}

/* Input Area Styles */
.input-area {
    padding: 0 32px 24px 32px;
    background: linear-gradient(to top, var(--bg-chat) 80%, transparent);
}

.input-container {
    max-width: 800px;
    margin: 0 auto;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    display: flex;
    align-items: flex-end;
    padding: 12px 16px;
    transition: all 0.3s;
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

.input-container:focus-within {
    border-color: var(--accent-color);
    box-shadow: 0 4px 25px var(--accent-glow);
    background: rgba(255, 255, 255, 0.05);
}

.input-container textarea {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 15px;
    resize: none;
    max-height: 200px;
    min-height: 24px;
    line-height: 24px;
}

.input-container textarea::placeholder {
    color: var(--text-secondary);
}

.btn-send {
    background: var(--accent-color);
    color: white;
    width: 38px;
    height: 38px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.btn-send:disabled {
    background: var(--glass-border);
    color: var(--text-secondary);
    cursor: not-allowed;
    box-shadow: none;
}

.footer-note {
    text-align: center;
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: 8px;
}

/* Animations */
@keyframes pulseLogo {
    0% {
        box-shadow: 0 5px 15px var(--accent-glow);
    }
    100% {
        box-shadow: 0 10px 30px rgba(138, 43, 226, 0.7);
    }
}

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

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}