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

:root {
    --primary-orange: #FF8C00;
    --dark-orange: #E67300;
    --light-orange: #FFA033;
    --bg-dark: #0D0D0D;
    --bg-darker: #000000;
    --sidebar-bg: #1A1A1A;
    --text-primary: #FFFFFF;
    --text-secondary: #A0A0A0;
    --border-color: #2D2D2D;
    --green-accent: #4A8B4A;
    --message-user: #2D2D2D;
    --message-ai: #1A1A1A;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
}

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

/* Sidebar Styles */
.sidebar {
    width: 280px;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 12px;
}

.sidebar-header {
    margin-bottom: 20px;
}

.new-chat-btn {
    width: 100%;
    padding: 14px 16px;
    background: linear-gradient(135deg, var(--primary-orange), var(--dark-orange));
    border: none;
    border-radius: 12px;
    color: white;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(255, 140, 0, 0.3);
}

.new-chat-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 140, 0, 0.4);
}

.plus-icon {
    font-size: 20px;
}

.chat-history {
    flex: 1;
    overflow-y: auto;
}

.history-title {
    font-size: 12px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 12px;
    padding: 0 8px;
}

.history-item {
    padding: 12px 14px;
    border-radius: 10px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-secondary);
    transition: all 0.2s ease;
    margin-bottom: 4px;
}

.history-item:hover {
    background-color: var(--border-color);
    color: var(--text-primary);
}

.sidebar-footer {
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.token-balance {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px;
    background: linear-gradient(135deg, rgba(255, 140, 0, 0.15), rgba(255, 140, 0, 0.05));
    border-radius: 12px;
    border: 1px solid var(--primary-orange);
    font-weight: 600;
    color: var(--primary-orange);
}

.token-icon {
    font-size: 20px;
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-dark);
}

.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-color);
}

.model-selector {
    display: flex;
    align-items: center;
    gap: 12px;
}

.model-name {
    font-size: 16px;
    font-weight: 600;
}

.model-badge {
    background: linear-gradient(135deg, var(--primary-orange), var(--dark-orange));
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.connect-wallet-btn {
    padding: 10px 20px;
    background: transparent;
    border: 2px solid var(--primary-orange);
    border-radius: 25px;
    color: var(--primary-orange);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.connect-wallet-btn:hover {
    background: var(--primary-orange);
    color: var(--bg-dark);
}

/* Chat Container */
.chat-container {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
}

.welcome-screen {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
    padding: 40px 20px;
}

/* Main Logo */
.logo-container {
    margin-bottom: 24px;
}

.main-logo {
    width: 160px;
    height: 160px;
    object-fit: contain;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.title {
    font-size: 48px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-orange), var(--light-orange));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 12px;
}

.tagline {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 48px;
}

.feature-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.feature-card {
    background: linear-gradient(135deg, rgba(255, 140, 0, 0.1), rgba(255, 140, 0, 0.02));
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
    text-align: left;
    transition: all 0.3s ease;
    cursor: pointer;
}

.feature-card:hover {
    border-color: var(--primary-orange);
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(255, 140, 0, 0.15);
}

.card-icon {
    margin-bottom: 12px;
}

.card-logo {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

.feature-card h3 {
    font-size: 16px;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.feature-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.disclaimer {
    font-size: 12px;
    color: var(--text-secondary);
    padding: 16px;
    background: rgba(255, 140, 0, 0.1);
    border-radius: 12px;
    border: 1px solid rgba(255, 140, 0, 0.2);
}

/* Messages */
.messages {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.message {
    display: flex;
    gap: 16px;
    padding: 20px;
    border-radius: 16px;
    animation: fadeIn 0.3s ease;
}

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

.message.user {
    background: var(--message-user);
}

.message.assistant {
    background: var(--message-ai);
    border: 1px solid var(--border-color);
}

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
}

.message.user .message-avatar {
    background: var(--border-color);
}

.message.assistant .message-avatar {
    background: linear-gradient(135deg, var(--primary-orange), var(--dark-orange));
}

.avatar-logo {
    width: 24px;
    height: 24px;
    object-fit: contain;
}

.message-content {
    flex: 1;
    line-height: 1.6;
}

.message-content p {
    margin-bottom: 12px;
}

.message-content p:last-child {
    margin-bottom: 0;
}

/* Input Area */
.input-area {
    padding: 16px 24px 24px;
    background: var(--bg-dark);
}

.gas-indicator {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 12px;
    font-size: 13px;
}

.gas-label {
    color: var(--text-secondary);
}

.gas-value {
    color: var(--primary-orange);
    font-weight: 600;
}

.input-container {
    display: flex;
    gap: 12px;
    background: var(--sidebar-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 12px 16px;
    transition: border-color 0.3s ease;
}

.input-container:focus-within {
    border-color: var(--primary-orange);
}

textarea {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 15px;
    font-family: inherit;
    resize: none;
    outline: none;
    max-height: 200px;
}

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

.send-btn {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--primary-orange), var(--dark-orange));
    border: none;
    border-radius: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.send-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(255, 140, 0, 0.4);
}

.send-logo {
    width: 24px;
    height: 24px;
    object-fit: contain;
}

.input-footer {
    text-align: center;
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 12px;
}

/* Typing indicator */
.typing-indicator {
    display: flex;
    gap: 4px;
    padding: 8px 0;
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    background: var(--primary-orange);
    border-radius: 50%;
    animation: bounce 1.4s infinite ease-in-out;
}

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

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

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

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

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

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

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        display: none;
    }
    
    .feature-cards {
        grid-template-columns: 1fr;
    }
    
    .title {
        font-size: 36px;
    }
}