:root {
    --sb-accent: #37bfb5;
    --sb-accent-hover: #2ea89f;
    --sb-text: #212529;
    --sb-bg: #f8f9fa;
    --sb-white: #fff;
    --sb-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    --sb-radius: 0.5rem;
}

body {
    background: var(--sb-bg);
    color: var(--sb-text);
    min-height: 100vh;
}

.sb-container {
    max-width: 640px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

/* Navbar */
.navbar {
    background: var(--sb-white) !important;
    box-shadow: var(--sb-shadow);
}

.navbar-brand {
    font-weight: 700;
    color: var(--sb-accent) !important;
    font-size: 1.25rem;
}

.navbar-brand span {
    color: var(--sb-text);
}

/* Stepper */
.stepper {
    display: flex;
    justify-content: center;
    gap: 0;
    margin-bottom: 2rem;
}

.stepper-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    color: #adb5bd;
    position: relative;
}

.stepper-item:not(:last-child)::after {
    content: '';
    width: 2rem;
    height: 2px;
    background: #dee2e6;
    margin-left: 0.5rem;
}

.stepper-item.active {
    color: var(--sb-accent);
    font-weight: 600;
}

.stepper-item.active .stepper-number {
    background: var(--sb-accent);
    color: var(--sb-white);
}

.stepper-item.completed {
    color: var(--sb-accent);
}

.stepper-item.completed .stepper-number {
    background: var(--sb-accent);
    color: var(--sb-white);
}

.stepper-item.completed:not(:last-child)::after {
    background: var(--sb-accent);
}

.stepper-number {
    width: 1.75rem;
    height: 1.75rem;
    border-radius: 50%;
    background: #dee2e6;
    color: var(--sb-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 700;
    flex-shrink: 0;
}

/* Card */
.sb-card {
    background: var(--sb-white);
    border-radius: var(--sb-radius);
    box-shadow: var(--sb-shadow);
    padding: 2rem;
    border: none;
}

.sb-card h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

/* Buttons */
.btn-primary {
    background: var(--sb-accent) !important;
    border-color: var(--sb-accent) !important;
    color: var(--sb-white) !important;
}

.btn-primary:hover,
.btn-primary:focus {
    background: var(--sb-accent-hover) !important;
    border-color: var(--sb-accent-hover) !important;
}

.btn-primary:disabled {
    background: var(--sb-accent) !important;
    border-color: var(--sb-accent) !important;
    opacity: 0.65;
}

.btn-outline-primary {
    color: var(--sb-accent) !important;
    border-color: var(--sb-accent) !important;
}

.btn-outline-primary:hover {
    background: var(--sb-accent) !important;
    color: var(--sb-white) !important;
}

/* Status dot */
.status-dot {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.status-dot.connected {
    background: #28a745;
}

.status-dot.disconnected {
    background: #dc3545;
}

/* Form */
.form-label {
    font-weight: 500;
    font-size: 0.875rem;
}

.form-text {
    font-size: 0.8rem;
}

.input-group .btn {
    border-color: #dee2e6;
}

/* Connection status */
.connection-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
}

/* Footer */
.sb-footer {
    text-align: center;
    padding: 2rem 1rem;
    color: #6c757d;
    font-size: 0.8rem;
}

.sb-footer .disclaimer {
    max-width: 640px;
    margin: 0 auto 1rem;
    line-height: 1.5;
}

/* Filter panel animation */
.filter-panel {
    transition: opacity 0.2s ease;
}

/* Responsive */
@media (max-width: 576px) {
    .sb-container {
        padding: 1rem 0.75rem;
    }

    .sb-card {
        padding: 1.5rem;
    }

    .stepper {
        gap: 0;
    }

    .stepper-item {
        padding: 0.5rem;
        font-size: 0.75rem;
    }

    .stepper-item:not(:last-child)::after {
        width: 1rem;
    }

    .stepper-item .stepper-label {
        display: none;
    }
}