:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --border: #30363d;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --accent: #58a6ff;
    --accent-hover: #79b8ff;
    --success: #3fb950;
    --danger: #f85149;
    --warning: #d29922;
}

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

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

.screen { height: 100vh; }

/* Login */
.login-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    gap: 2rem;
}
.login-container h1 { font-size: 2rem; }
.login-options {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    width: 320px;
}
.divider {
    text-align: center;
    color: var(--text-secondary);
    position: relative;
}
.divider::before, .divider::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 40%;
    height: 1px;
    background: var(--border);
}
.divider::before { left: 0; }
.divider::after { right: 0; }
.share-login { display: flex; flex-direction: column; gap: 0.5rem; }

/* Buttons */
.btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    cursor: pointer;
    font-size: 0.875rem;
    transition: background 0.15s;
}
.btn:hover { background: var(--border); }
.btn-primary {
    background: #238636;
    border-color: #2ea043;
}
.btn-primary:hover { background: #2ea043; }
.btn-secondary {
    background: var(--bg-secondary);
    border-color: var(--border);
}
.btn-lg { padding: 0.75rem 1.5rem; font-size: 1rem; }
.btn-sm { padding: 0.25rem 0.75rem; font-size: 0.8rem; }
.btn-danger { background: #da3633; border-color: #f85149; }
.btn-danger:hover { background: #f85149; }

.input {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.875rem;
}
.input:focus { outline: none; border-color: var(--accent); }

select.input {
    appearance: auto;
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 1rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    height: 48px;
    flex-shrink: 0;
}
.nav-left, .nav-right { display: flex; align-items: center; gap: 0.75rem; }
.nav-left h2 { font-size: 1rem; margin-right: 1rem; }
.nav-btn {
    padding: 0.25rem 0.75rem;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.875rem;
    border-radius: 4px;
}
.nav-btn:hover { color: var(--text-primary); background: var(--bg-tertiary); }
.nav-btn.active { color: var(--text-primary); background: var(--bg-tertiary); }
#user-info { color: var(--text-secondary); font-size: 0.8rem; }

/* Agent List */
.view {
    height: calc(100vh - 48px);
    overflow-y: auto;
    padding: 1rem;
}
.agent-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1rem;
}
.agent-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem;
    cursor: pointer;
    transition: border-color 0.15s;
}
.agent-card:hover { border-color: var(--accent); }
.agent-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}
.agent-card-hostname { font-weight: 600; font-size: 1rem; }
.agent-card-id {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-family: monospace;
}
.agent-card-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.75rem;
}

/* Status badges */
.status-badge {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
}
.status-online { background: rgba(63, 185, 80, 0.2); color: var(--success); }
.status-offline { background: rgba(139, 148, 158, 0.2); color: var(--text-secondary); }
.status-attached { background: rgba(88, 166, 255, 0.2); color: var(--accent); }
.status-detached { background: rgba(210, 153, 34, 0.2); color: var(--warning); }

/* Terminal View */
.terminal-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.5rem 1rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
}
#terminal-view .terminal-header + #terminal-container {
    height: calc(100vh - 48px - 41px);
}
#terminal-container {
    height: calc(100vh - 48px - 41px);
    background: #000;
}
#terminal-view { padding: 0; overflow: hidden; }

/* Grid View */
#grid-view { padding: 0.5rem; overflow-y: auto; }
.terminal-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(480px, 1fr));
    gap: 0.5rem;
    height: 100%;
}
.grid-cell {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 4px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    min-height: 300px;
}
.grid-cell-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.25rem 0.5rem;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border);
    font-size: 0.75rem;
}
.grid-cell-terminal {
    flex: 1;
    min-height: 0;
}

/* 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 {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    width: 480px;
    max-width: 90vw;
    max-height: 80vh;
    overflow-y: auto;
}
.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid var(--border);
}
.modal-header h3 { font-size: 1rem; }
.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.25rem;
    cursor: pointer;
}
.modal-body { padding: 1rem; }

/* Session list */
.session-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border);
}
.session-item:last-child { border-bottom: none; }
.session-name { font-family: monospace; font-size: 0.9rem; }
.session-pid { color: var(--text-secondary); font-size: 0.75rem; }

/* Deploy modal */
.deploy-command {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0.75rem;
    font-family: monospace;
    font-size: 0.8rem;
    word-break: break-all;
    cursor: pointer;
    position: relative;
}
.deploy-command:hover::after {
    content: 'Click to copy';
    position: absolute;
    top: -1.5rem;
    right: 0;
    font-size: 0.7rem;
    color: var(--accent);
}
.copy-feedback {
    color: var(--success);
    font-size: 0.8rem;
    margin-top: 0.5rem;
}

/* Share modal */
.share-form { display: flex; flex-direction: column; gap: 0.75rem; }
.share-form label { font-size: 0.85rem; color: var(--text-secondary); }
.share-form .checkbox-group { display: flex; flex-direction: column; gap: 0.25rem; }
.share-form .checkbox-group label {
    display: flex; align-items: center; gap: 0.5rem;
    color: var(--text-primary); cursor: pointer;
}
.share-result {
    margin-top: 1rem;
    padding: 0.75rem;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 4px;
}
.share-result .password {
    font-family: monospace;
    font-size: 1.1rem;
    color: var(--accent);
    word-break: break-all;
    cursor: pointer;
}

/* 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-secondary); }

/* Empty state */
.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
}
.empty-state h3 { margin-bottom: 0.5rem; }