:root {
    --primary-color: #00a884;
    --primary-hover: #008f6f;
    --secondary-color: #111b21;
    --sidebar-bg: #202c33;
    --card-bg: #202c33;
    --text-primary: #e9edef;
    --text-secondary: #8696a0;
    --border-color: #2a3942;
    --success-color: #00a884;
    --danger-color: #f15c6d;
    --warning-color: #ffd279;
    --info-color: #53bdeb;
    --sidebar-width: 260px;
    --header-height: 60px;
}

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

body {
    background-color: var(--secondary-color);
    font-family: 'Segoe UI', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    color: var(--text-primary);
    overflow-x: hidden;
}

/* Login Page */
#login-section {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--secondary-color);
}

#login-section .card {
    width: 100%;
    max-width: 400px;
    background-color: var(--card-bg);
    border-radius: 10px;
    padding: 2rem;
    box-shadow: 0 4px 12px rgba(0,0,0,0.5);
}

.form-control {
    background-color: var(--secondary-color);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.75rem;
    border-radius: 5px;
    width: 100%;
    margin-bottom: 1rem;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    color: var(--text-primary);
}

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    width: 100%;
}

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

/* Dashboard Layout */
#dashboard-section {
    display: none;
    min-height: 100vh;
    display: flex;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
}

.sidebar-header {
    height: var(--header-height);
    display: flex;
    align-items: center;
    padding: 0 1.5rem;
    font-size: 1.25rem;
    font-weight: bold;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
}

.sidebar-menu {
    padding: 1rem 0;
    flex: 1;
}

.menu-item {
    padding: 0.75rem 1.5rem;
    display: flex;
    align-items: center;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.2s;
    border-left: 3px solid transparent;
}

.menu-item i {
    margin-right: 10px;
    font-size: 1.2rem;
}

.menu-item:hover, .menu-item.active {
    background-color: rgba(255,255,255,0.05);
    color: var(--text-primary);
}

.menu-item.active {
    border-left-color: var(--primary-color);
}

.sidebar-footer {
    padding: 1rem 0;
    border-top: 1px solid var(--border-color);
}

/* Main Content */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    padding: 2rem;
    background-color: var(--secondary-color);
    width: calc(100% - var(--sidebar-width));
}

.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.page-title {
    font-size: 1.5rem;
    font-weight: 600;
}

/* Stats Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background-color: var(--card-bg);
    padding: 20px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    border: 1px solid var(--border-color);
}

.stat-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: rgba(255,255,255,0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-right: 15px;
}

.stat-info h3 {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    margin-bottom: 5px;
}

.stat-info p {
    font-size: 1.5rem;
    font-weight: 600;
}

/* Instances Grid */
.instances-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.instance-card {
    background-color: var(--card-bg);
    border-radius: 10px;
    padding: 20px;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

.instance-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.instance-status {
    font-size: 0.75rem;
    font-weight: bold;
    padding: 4px 8px;
    border-radius: 4px;
    text-transform: uppercase;
}

.status-connected {
    background-color: rgba(0, 168, 132, 0.15);
    color: var(--success-color);
}

.status-disconnected {
    background-color: rgba(241, 92, 109, 0.15);
    color: var(--danger-color);
}

.instance-body {
    flex: 1;
    margin-bottom: 20px;
}

.instance-name {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 5px;
}

.instance-phone {
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 5px;
}

.instance-footer {
    display: flex;
    gap: 10px;
}

.btn-action {
    flex: 1;
    padding: 8px;
    border-radius: 5px;
    border: none;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
    transition: all 0.2s;
}

.btn-test {
    background-color: rgba(255,255,255,0.05);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-test:hover {
    background-color: rgba(255,255,255,0.1);
}

.btn-reconnect {
    background-color: var(--primary-color);
    color: white;
}

.btn-reconnect:hover {
    background-color: var(--primary-hover);
}

/* Utility */
.d-flex { display: flex; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }
.mb-3 { margin-bottom: 1rem; }
.mb-0 { margin-bottom: 0; }
.text-secondary { color: var(--text-secondary); }
.text-success { color: var(--success-color); }
.text-danger { color: var(--danger-color); }
.icon-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 5px;
    border-radius: 50%;
    transition: all 0.2s;
}
.icon-btn:hover {
    background-color: rgba(255,255,255,0.1);
    color: var(--text-primary);
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.7);
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background-color: var(--card-bg);
    padding: 0;
    border-radius: 10px;
    width: 100%;
    max-width: 500px;
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 25px rgba(0,0,0,0.5);
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-title {
    font-size: 1.2rem;
    font-weight: 600;
}

.close-modal {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

/* Switch */
.switch {
    position: relative;
    display: inline-block;
    width: 40px;
    height: 20px;
}
.switch input { opacity: 0; width: 0; height: 0; }
.slider {
    position: absolute;
    cursor: pointer;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: #37404a;
    transition: .4s;
    border-radius: 20px;
}
.slider:before {
    position: absolute;
    content: "";
    height: 14px;
    width: 14px;
    left: 3px;
    bottom: 3px;
    background-color: #8696a0;
    transition: .4s;
    border-radius: 50%;
}
input:checked + .slider { background-color: var(--primary-color); }
input:checked + .slider:before { transform: translateX(20px); background-color: white; }

/* Checkbox Grid */
.checkbox-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-top: 10px;
}
.checkbox-item {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
    cursor: pointer;
}
.checkbox-item input {
    accent-color: var(--primary-color);
    width: 16px;
    height: 16px;
}

/* Tabs */
.tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 20px;
}
.tab-btn {
    padding: 10px 20px;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-secondary);
    cursor: pointer;
    font-weight: 600;
}
.tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}
.tab-content { display: none; }
.tab-content.active { display: block; }