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

:root {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-tertiary: #0f3460;
    --accent: #e94560;
    --accent-soft: #d4a5a5;
    --text-primary: #eaeaea;
    --text-secondary: #a0a0a0;
    --user-bubble: #0f3460;
    --assistant-bubble: #2d1b4e;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
header {
    text-align: center;
    padding: 20px 0;
    border-bottom: 1px solid var(--bg-tertiary);
    margin-bottom: 20px;
}

header h1 {
    font-size: 2.5rem;
    background: linear-gradient(45deg, var(--accent), var(--accent-soft));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 300;
    letter-spacing: 2px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-top: 5px;
}

.model-info {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 10px;
}

.memory-status {
    font-size: 0.8rem;
    color: var(--accent-soft);
    margin-top: 5px;
    padding: 5px 15px;
    background: var(--bg-tertiary);
    border-radius: 15px;
    display: inline-block;
}

.memory-status.warning {
    background: var(--accent);
    color: white;
}

/* Chat Container */
.chat-container {
    flex-grow: 1;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    max-height: 60vh;
}

.message {
    padding: 15px 20px;
    border-radius: 20px;
    max-width: 80%;
    line-height: 1.6;
    word-wrap: break-word;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.message.user {
    align-self: flex-end;
    background: var(--user-bubble);
    border-bottom-right-radius: 5px;
}

.message.assistant {
    align-self: flex-start;
    background: var(--assistant-bubble);
    border-bottom-left-radius: 5px;
    border-left: 3px solid var(--accent);
}

.message.system {
    align-self: center;
    background: rgba(233, 69, 96, 0.1);
    border: 1px solid var(--accent);
    font-style: italic;
}

.message em {
    color: var(--accent-soft);
    font-style: italic;
}

/* Input Area */
.input-area {
    position: sticky;
    bottom: 0;
    background: var(--bg-primary);
    padding: 20px 0;
    border-top: 1px solid var(--bg-tertiary);
}

.typing-indicator {
    text-align: center;
    color: var(--accent-soft);
    font-size: 0.85rem;
    margin-bottom: 10px;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

.input-row {
    display: flex;
    gap: 10px;
}

textarea {
    flex-grow: 1;
    background: var(--bg-secondary);
    border: 1px solid var(--bg-tertiary);
    border-radius: 25px;
    padding: 15px 20px;
    color: var(--text-primary);
    font-size: 1rem;
    resize: none;
    min-height: 50px;
    max-height: 150px;
    font-family: inherit;
    outline: none;
    transition: border-color 0.3s;
}

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

.send-btn {
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 25px;
    padding: 15px 30px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s;
    height: 50px;
}

.send-btn:hover:not(:disabled) {
    background: #ff5a75;
    transform: scale(1.05);
}

.send-btn:disabled {
    background: var(--bg-tertiary);
    cursor: not-allowed;
}

.controls {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 15px;
    align-items: center;
}

.control-btn {
    background: transparent;
    border: 1px solid var(--bg-tertiary);
    color: var(--text-secondary);
    padding: 8px 15px;
    border-radius: 15px;
    cursor: pointer;
    font-size: 0.8rem;
    transition: all 0.3s;
}

.control-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.char-count {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
}

.modal-content {
    background-color: var(--bg-secondary);
    margin: 5% auto;
    padding: 30px;
    border-radius: 15px;
    width: 80%;
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
    border: 1px solid var(--bg-tertiary);
}

.close {
    color: var(--text-secondary);
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.close:hover {
    color: var(--accent);
}

.modal-content h2 {
    color: var(--accent);
    margin-bottom: 20px;
    font-weight: 300;
}

.modal-content h3 {
    color: var(--accent-soft);
    margin: 20px 0 10px;
    font-size: 1rem;
}

.modal-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin: 5px 0;
}

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

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

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

::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}

/* Responsive */
@media (max-width: 600px) {
    .container {
        padding: 10px;
    }
    
    header h1 {
        font-size: 1.8rem;
    }
    
    .message {
        max-width: 90%;
        padding: 12px 15px;
    }
    
    .input-row {
        flex-direction: column;
    }
    
    .send-btn {
        width: 100%;
    }
}