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

:root {
    --bg: #0d1117;
    --sidebar-bg: #161b22;
    --border: #30363d;
    --text: #e6edf3;
    --text-muted: #8b949e;
    --accent: #58a6ff;
    --green: #3fb950;
    --yellow: #d29922;
    --red: #f85149;
    --hover: #1f2937;
    --active: #1f6feb22;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    height: 100vh;
    overflow: hidden;
}

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

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

.sidebar-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    font-size: 18px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.project-list {
    flex: 1;
    overflow-y: auto;
    padding: 8px 0;
}

.project-item {
    padding: 10px 20px;
    cursor: pointer;
    border-left: 3px solid transparent;
    transition: background 0.15s;
}

.project-item:hover {
    background: var(--hover);
}

.project-item.active {
    background: var(--active);
    border-left-color: var(--accent);
}

.project-item .name {
    font-size: 14px;
    font-weight: 500;
}

.project-item .desc {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.project-item .session-badge {
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--green);
    margin-left: 6px;
    vertical-align: middle;
}

.sidebar-footer {
    padding: 12px 16px;
    border-top: 1px solid var(--border);
}

.btn-new-project {
    width: 100%;
    padding: 8px 16px;
    background: transparent;
    color: var(--text-muted);
    border: 1px dashed var(--border);
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.15s;
}

.btn-new-project:hover {
    color: var(--text);
    border-color: var(--text-muted);
    background: var(--hover);
}

/* Main area */
.main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.terminal-header {
    padding: 10px 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 12px;
    min-height: 48px;
}

.terminal-header .project-title {
    font-size: 15px;
    font-weight: 600;
    flex: 1;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--red);
}

.status-dot.connected { background: var(--green); }
.status-dot.connecting { background: var(--yellow); }
.status-dot.disconnected { background: var(--red); }

.terminal-header .btn {
    padding: 5px 14px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: transparent;
    color: var(--text);
    cursor: pointer;
    font-size: 13px;
    transition: all 0.15s;
}

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

.terminal-header .btn-green {
    border-color: var(--green);
    color: var(--green);
}

.terminal-header .btn-blue {
    border-color: var(--accent);
    color: var(--accent);
}

.terminal-container {
    flex: 1;
    padding: 4px;
    overflow: hidden;
}

.terminal-container .xterm {
    height: 100%;
}

.empty-state {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 15px;
}

/* Modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
}

.modal-overlay.hidden {
    display: none;
}

.modal {
    background: var(--sidebar-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    min-width: 400px;
    max-width: 500px;
}

.modal h2 {
    font-size: 18px;
    margin-bottom: 16px;
}

.modal label {
    display: block;
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 4px;
    margin-top: 12px;
}

.modal input,
.modal textarea {
    width: 100%;
    padding: 8px 12px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    font-size: 14px;
    font-family: inherit;
}

.modal textarea {
    resize: vertical;
    min-height: 60px;
}

.modal-actions {
    display: flex;
    gap: 8px;
    margin-top: 20px;
    justify-content: flex-end;
}

.modal-actions .btn {
    padding: 8px 20px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: transparent;
    color: var(--text);
    cursor: pointer;
    font-size: 14px;
}

.modal-actions .btn-primary {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

.modal-actions .btn-green {
    background: var(--green);
    border-color: var(--green);
    color: #fff;
}

.modal-actions .btn-blue {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}