:root {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-tertiary: #0f3460;
    --bg-input: #1e2a4a;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0b0;
    --text-muted: #6c6c80;
    --accent: #e94560;
    --accent-hover: #ff6b81;
    --border: #2a2a4a;
    --success: #4caf50;
    --warning: #ff9800;
    --error: #f44336;
    --code-bg: #0d1117;
    --shadow: rgba(0, 0, 0, 0.3);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
}

a {
    color: var(--accent);
    text-decoration: none;
}

a:hover {
    color: var(--accent-hover);
}

/* Login */
.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.login-box {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 2.5rem;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 8px 32px var(--shadow);
}

.login-box h1 {
    text-align: center;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    color: var(--accent);
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.4rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.form-group input {
    width: 100%;
    padding: 0.7rem 1rem;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s;
}

.form-group input:focus {
    border-color: var(--accent);
}

.btn {
    display: inline-block;
    padding: 0.7rem 1.5rem;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.2s;
    text-align: center;
}

.btn:hover {
    background: var(--accent-hover);
}

.btn-full {
    width: 100%;
}

.error-msg {
    background: rgba(244, 67, 54, 0.15);
    color: var(--error);
    padding: 0.6rem 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    font-size: 0.9rem;
    text-align: center;
}

/* Projects grid */
.projects-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem;
}

.projects-container h1 {
    margin-bottom: 1.5rem;
    color: var(--accent);
}

.projects-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.projects-header .btn {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
}

.project-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    cursor: pointer;
    transition: border-color 0.2s, transform 0.1s;
    text-decoration: none;
    color: var(--text-primary);
    display: block;
}

.project-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    color: var(--text-primary);
}

.project-card h3 {
    margin-bottom: 0.4rem;
}

.project-card p {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* Chat layout */
.chat-container {
    display: flex;
    height: 100vh;
}

.sidebar {
    width: 300px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

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

.sidebar-header h3 {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.sidebar-content {
    flex: 1;
    overflow-y: auto;
    padding: 0.5rem;
}

.file-item {
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: block;
    text-decoration: none;
    transition: background 0.15s;
}

.file-item:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.file-item.active {
    background: var(--bg-tertiary);
    color: var(--accent);
}

.chat-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.chat-header {
    padding: 0.75rem 1.5rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-secondary);
}

.chat-header h2 {
    font-size: 1.1rem;
}

.chat-header .status {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.chat-header .status.connected {
    color: var(--success);
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.message {
    max-width: 85%;
    padding: 0.8rem 1.2rem;
    border-radius: 12px;
    line-height: 1.5;
    font-size: 0.95rem;
    word-wrap: break-word;
}

.message-user {
    align-self: flex-end;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
}

.message-assistant {
    align-self: flex-start;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
}

.message-assistant .content {
    white-space: pre-wrap;
}

.message-system {
    align-self: center;
    background: transparent;
    color: var(--text-muted);
    font-size: 0.85rem;
    font-style: italic;
}

.message-tool {
    align-self: flex-start;
    background: rgba(15, 52, 96, 0.5);
    border: 1px solid var(--border);
    font-size: 0.85rem;
    color: var(--text-secondary);
    max-width: 90%;
}

.message-tool .tool-name {
    color: var(--warning);
    font-weight: 600;
    margin-bottom: 0.3rem;
}

.typing-indicator {
    align-self: flex-start;
    color: var(--text-muted);
    font-style: italic;
    font-size: 0.85rem;
    padding: 0.5rem 0;
}

.typing-indicator .dots {
    display: inline-block;
    animation: blink 1.4s infinite;
}

@keyframes blink {
    0%, 20% { opacity: 1; }
    50% { opacity: 0.3; }
    80%, 100% { opacity: 1; }
}

.chat-input-area {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border);
    background: var(--bg-secondary);
}

.chat-input-form {
    display: flex;
    gap: 0.75rem;
}

.chat-input {
    flex: 1;
    padding: 0.75rem 1rem;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    outline: none;
    resize: none;
    font-family: inherit;
    min-height: 44px;
    max-height: 200px;
}

.chat-input:focus {
    border-color: var(--accent);
}

.chat-input-form .btn {
    align-self: flex-end;
}

/* Code blocks in messages */
.message pre {
    background: var(--code-bg);
    border-radius: 6px;
    padding: 0.8rem;
    overflow-x: auto;
    margin: 0.5rem 0;
    font-size: 0.85rem;
}

.message code {
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 0.9em;
}

.message p code {
    background: var(--code-bg);
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
}

/* File viewer overlay */
.file-viewer {
    position: fixed;
    top: 0;
    right: 0;
    width: 50%;
    height: 100vh;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border);
    z-index: 100;
    display: flex;
    flex-direction: column;
    box-shadow: -4px 0 16px var(--shadow);
}

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

.file-viewer-content {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
    line-height: 1.6;
}

.file-viewer-content h1,
.file-viewer-content h2,
.file-viewer-content h3 {
    margin: 1rem 0 0.5rem;
    color: var(--accent);
}

.file-viewer-content pre {
    background: var(--code-bg);
    border-radius: 6px;
    padding: 1rem;
    overflow-x: auto;
}

.file-viewer-content code {
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
}

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

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

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

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

/* Hidden */
.hidden {
    display: none !important;
}