/* ── Reset ────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; width: 100%; overflow: hidden; }
body { font-family: var(--font); background: var(--bg-primary); color: var(--text-primary); }

/* ── Login screen ─────────────────────────────────────────────── */
.login-screen {
	display: flex; align-items: center; justify-content: center;
	height: 100vh; background: var(--bg-primary);
}
.login-card {
	background: var(--bg-secondary); border: 1px solid var(--border);
	border-radius: var(--radius); padding: 32px; width: 360px; max-width: 90vw;
}
.login-logo { font-size: 48px; text-align: center; margin-bottom: 8px; }
.login-card h1 { font-size: 20px; font-weight: 600; text-align: center; margin-bottom: 24px; color: var(--text-primary); }
.login-card form { display: flex; flex-direction: column; gap: 12px; }
.login-card input {
	background: var(--bg-tertiary); border: 1px solid var(--border); border-radius: var(--radius-sm);
	color: var(--text-primary); padding: 10px 14px; font-size: 15px; font-family: var(--font);
}
.login-card input:focus { outline: none; border-color: var(--accent); }
.login-card input::placeholder { color: var(--text-muted); }
.login-card button {
	background: var(--accent); color: #fff; border: none; border-radius: var(--radius-sm);
	padding: 10px 16px; font-size: 15px; cursor: pointer; font-family: var(--font);
}
.login-card button:hover { background: var(--accent-hover); }
.login-error { color: var(--danger); font-size: 13px; margin-top: 8px; min-height: 18px; }
.login-card a { display: block; text-align: center; margin-top: 16px; color: var(--accent); text-decoration: none; font-size: 14px; }

/* ── App layout ───────────────────────────────────────────────── */
#app { display: flex; height: 100vh; }

/* ── Sidebar ──────────────────────────────────────────────────── */
.sidebar {
	width: var(--sidebar-w); background: var(--bg-secondary); border-right: 1px solid var(--border);
	display: flex; flex-direction: column; transition: width 0.2s ease; flex-shrink: 0;
}
.sidebar.collapsed { width: 0; border-right: none; overflow: hidden; }
.sidebar-header {
	display: flex; align-items: center; justify-content: space-between;
	padding: 12px 16px; border-bottom: 1px solid var(--border); height: var(--header-h);
}
.sidebar-title { font-size: 16px; font-weight: 600; }
.sidebar-toggle {
	background: none; border: none; color: var(--text-secondary); font-size: 18px; cursor: pointer;
	padding: 4px 8px; border-radius: var(--radius-sm);
}
.sidebar-toggle:hover { background: var(--bg-hover); color: var(--text-primary); }
.new-session-btn {
	margin: 12px 12px 8px; padding: 10px 14px; background: var(--bg-tertiary);
	border: 1px solid var(--border); border-radius: var(--radius-sm); color: var(--text-primary);
	font-size: 14px; cursor: pointer; font-family: var(--font); text-align: center;
}
.new-session-btn:hover { background: var(--bg-hover); border-color: var(--accent); }
.session-list { flex: 1; overflow-y: auto; padding: 4px 8px; }
.session-item {
	display: flex; align-items: center; padding: 10px 12px; border-radius: var(--radius-sm);
	cursor: pointer; color: var(--text-secondary); font-size: 14px; gap: 8px;
	margin-bottom: 2px; transition: background 0.1s;
}
.session-item:hover { background: var(--bg-tertiary); color: var(--text-primary); }
.session-item.active { background: var(--bg-tertiary); color: var(--text-primary); }
.session-item .session-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.session-item .session-close {
	background: none; border: none; color: var(--text-muted); cursor: pointer;
	font-size: 16px; padding: 0 4px; border-radius: var(--radius-sm); opacity: 0; transition: opacity 0.1s;
}
.session-item:hover .session-close { opacity: 1; }
.session-item .session-close:hover { color: var(--danger); }
.sidebar-footer {
	display: flex; align-items: center; padding: 8px 12px; border-top: 1px solid var(--border); gap: 8px;
}
.user-info { flex: 1; font-size: 13px; color: var(--text-secondary); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.settings-btn, .logout-btn {
	background: none; border: none; color: var(--text-secondary); font-size: 18px; cursor: pointer;
	padding: 4px 8px; border-radius: var(--radius-sm);
}
.settings-btn:hover, .logout-btn:hover { background: var(--bg-hover); color: var(--text-primary); }
.logout-btn:hover { color: var(--danger); }

/* ── Terminal area ────────────────────────────────────────────── */
.terminal-area { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.terminal-header {
	height: var(--header-h); display: flex; align-items: center; padding: 0 16px;
	background: var(--bg-secondary); border-bottom: 1px solid var(--border);
	font-size: 14px; color: var(--text-secondary);
}
.terminal-container { flex: 1; padding: 8px; background: var(--bg-primary); overflow: hidden; }

/* xterm.js terminal */
.terminal-container .xterm { height: 100%; }
.terminal-container .xterm-viewport { background-color: var(--bg-primary) !important; }

/* ── Modal ────────────────────────────────────────────────────── */
.modal {
	position: fixed; inset: 0; background: rgba(0,0,0,0.6);
	display: flex; align-items: center; justify-content: center; z-index: 1000;
}
.modal-card {
	background: var(--bg-secondary); border: 1px solid var(--border); border-radius: var(--radius);
	padding: 24px; width: 400px; max-width: 90vw; max-height: 80vh; overflow-y: auto;
}
.modal-card h2 { font-size: 18px; margin-bottom: 16px; }
.settings-section { margin-bottom: 20px; }
.settings-section h3 { font-size: 15px; margin-bottom: 12px; color: var(--text-secondary); }
.settings-section form { display: flex; flex-direction: column; gap: 10px; }
.settings-section input {
	background: var(--bg-tertiary); border: 1px solid var(--border); border-radius: var(--radius-sm);
	color: var(--text-primary); padding: 9px 12px; font-size: 14px; font-family: var(--font);
}
.settings-section input:focus { outline: none; border-color: var(--accent); }
.settings-section button {
	background: var(--accent); color: #fff; border: none; border-radius: var(--radius-sm);
	padding: 9px 16px; font-size: 14px; cursor: pointer; font-family: var(--font);
}
.settings-section button:hover { background: var(--accent-hover); }
.modal-close {
	background: var(--bg-tertiary); color: var(--text-secondary); border: 1px solid var(--border);
	border-radius: var(--radius-sm); padding: 8px 16px; font-size: 14px; cursor: pointer; font-family: var(--font);
	margin-top: 8px; width: 100%;
}
.modal-close:hover { background: var(--bg-hover); color: var(--text-primary); }

/* ── Responsive ───────────────────────────────────────────────── */
@media (max-width: 768px) {
	.sidebar {
		position: fixed; left: 0; top: 0; bottom: 0; z-index: 100;
		width: var(--sidebar-w);
	}
	.sidebar.collapsed { transform: translateX(-100%); width: var(--sidebar-w); }
	.terminal-area { width: 100%; }
}