:root {
    --tenant-card-bg: rgba(255, 255, 255, 0.9);
    --tenant-border: rgba(102, 126, 234, 0.25);
    --tenant-shadow: 0 20px 50px rgba(102, 126, 234, 0.15);
    --tenant-error-bg: rgba(220, 53, 69, 0.1);
    --tenant-error-text: #dc3545;
}

@media (prefers-color-scheme: dark) {
    :root {
        --tenant-card-bg: rgba(18, 24, 38, 0.95);
        --tenant-border: rgba(255, 255, 255, 0.08);
        --tenant-shadow: 0 20px 50px rgba(0, 0, 0, 0.7);
        --tenant-error-bg: rgba(248, 81, 73, 0.12);
        --tenant-error-text: #ff7b72;
    }
}

.tenant-select-body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: radial-gradient(circle at top, rgba(102, 126, 234, 0.15), transparent 60%),
        radial-gradient(circle at bottom, rgba(118, 75, 162, 0.2), transparent 65%),
        var(--background-color);
    padding: 2rem 1rem;
}

.tenant-select-container {
    width: 100%;
    max-width: 520px;
}

.tenant-select-card {
    background: var(--tenant-card-bg);
    border-radius: 1.5rem;
    padding: 2.5rem 2rem;
    border: 1px solid var(--tenant-border);
    box-shadow: var(--tenant-shadow);
    backdrop-filter: blur(10px);
}

.tenant-select-header {
    text-align: center;
    margin-bottom: 1.5rem;
}

.tenant-select-logo {
    width: 80px;
    height: auto;
    margin-bottom: 1rem;
}

.tenant-select-header h1 {
    margin: 0;
    font-size: 1.8rem;
}

.tenant-select-header p {
    margin-top: 0.5rem;
    color: var(--text-muted);
}

.tenant-select-form label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.tenant-select-input-group {
    display: flex;
    align-items: stretch;
    margin-bottom: 1.5rem;
    width: 100%;
    gap: 0;
}

.tenant-select-input-group input {
    flex: 1;
    min-width: 0;
    padding: 0.85rem 1rem;
    border-radius: 0.8rem;
    border: 1px solid var(--tenant-border);
    background: rgba(255, 255, 255, 0.85);
    font-size: 1rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.tenant-select-input-group--has-domain input {
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
    border-right: none;
}

@media (prefers-color-scheme: dark) {
    .tenant-select-input-group input {
        background: rgba(15, 23, 42, 0.8);
        color: #fff;
    }
}

.tenant-select-input-group input:focus {
    outline: none;
    border-color: var(--accent-color, #667eea);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.25);
}

.tenant-select-input-group--has-domain input:focus + .tenant-select-domain {
    border-color: var(--accent-color, #667eea);
    border-left: none;
}

.tenant-select-domain {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 1 auto;
    min-width: 0;
    padding: 0.85rem 0.9rem;
    background: rgba(255, 255, 255, 0.85);
    border: 1px solid var(--tenant-border);
    border-left: none;
    border-radius: 0 0.8rem 0.8rem 0;
    font-weight: 600;
    font-size: 0.95rem;
    color: inherit;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 55%;
}

.tenant-select-input-group:not(.tenant-select-input-group--has-domain) .tenant-select-domain {
    display: none;
}

@media (prefers-color-scheme: dark) {
    .tenant-select-domain {
        background: rgba(15, 23, 42, 0.8);
        color: #fff;
        border-color: var(--tenant-border);
    }
}

.tenant-select-button {
    width: 100%;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    padding: 0.85rem 1rem;
    border-radius: 0.9rem;
    border: none;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: #fff;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.tenant-select-button:hover {
    transform: translateY(-1px);
    box-shadow: 0 12px 30px rgba(118, 75, 162, 0.3);
}

.tenant-select-form--submitting .tenant-select-button {
    cursor: wait;
    opacity: 0.8;
}

.tenant-select-spinner {
    width: 1.2rem;
    height: 1.2rem;
    margin-left: 0.6rem;
    border: 2px solid rgba(255, 255, 255, 0.4);
    border-top-color: #fff;
    border-radius: 50%;
    animation: tenant-spin 0.8s linear infinite;
    display: none;
}

.tenant-select-form--submitting .tenant-select-spinner {
    display: inline-block;
}

@keyframes tenant-spin {
    to {
        transform: rotate(360deg);
    }
}

.tenant-select-message {
    border-radius: 0.8rem;
    padding: 0.85rem 1rem;
    margin-bottom: 1rem;
    font-weight: 500;
}

.tenant-select-message--error {
    background: var(--tenant-error-bg);
    color: var(--tenant-error-text);
}

.tenant-select-info {
    margin-top: 1.5rem;
    text-align: center;
    color: var(--text-muted);
}

.tenant-select-hint {
    font-size: 0.85rem;
    margin-top: 0.5rem;
    color: var(--text-secondary);
}

@media (max-width: 600px) {
    .tenant-select-card {
        padding: 2rem 1.5rem;
    }

    .tenant-select-domain {
        font-size: 0.85rem;
        padding: 0.75rem 0.8rem;
        max-width: 50%;
    }
}