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

:root {
    --bg-gradient-start: #f8f9fa;
    --bg-gradient-mid: #e9ecef;
    --bg-gradient-end: #dee2e6;
    --card-bg: rgba(255, 255, 255, 0.9);
    --card-border: rgba(0, 0, 0, 0.1);
    --card-shadow: rgba(0, 0, 0, 0.1);
    --text-primary: #1a1820;
    --text-secondary: rgba(0, 0, 0, 0.6);
    --text-muted: rgba(0, 0, 0, 0.4);
    --loading-bg: rgba(0, 0, 0, 0.05);
    --loading-border: rgba(0, 0, 0, 0.2);
    --loading-spinner: #1a1820;
    --error-bg: rgba(239, 68, 68, 0.1);
    --error-border: rgba(239, 68, 68, 0.3);
    --error-text: #dc2626;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-gradient-start: #1a1820;
        --bg-gradient-mid: #222126;
        --bg-gradient-end: #2a2830;
        --card-bg: rgba(255, 255, 255, 0.05);
        --card-border: rgba(255, 255, 255, 0.1);
        --card-shadow: rgba(0, 0, 0, 0.4);
        --text-primary: #FFFFFF;
        --text-secondary: rgba(255, 255, 255, 0.6);
        --text-muted: rgba(255, 255, 255, 0.4);
        --loading-bg: rgba(255, 255, 255, 0.08);
        --loading-border: rgba(255, 255, 255, 0.2);
        --loading-spinner: #FFFFFF;
        --error-bg: rgba(239, 68, 68, 0.1);
        --error-border: rgba(239, 68, 68, 0.3);
        --error-text: #fca5a5;
    }
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-mid) 50%, var(--bg-gradient-end) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    transition: background 0.3s ease;
}

.login-container,
.logout-container {
    width: 100%;
    max-width: 420px;
}

.logout-container {
    text-align: center;
}

.login-card,
.logout-card {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--card-border);
    box-shadow: 0 8px 32px var(--card-shadow);
    border-radius: 16px;
    padding: 40px 32px;
    transition: background 0.3s ease, border 0.3s ease, box-shadow 0.3s ease;
}

.logout-card {
    padding: 48px 32px;
}

.header {
    text-align: center;
    margin-bottom: 32px;
}

h1 {
    color: var(--text-primary);
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 8px;
    transition: color 0.3s ease;
}

.logout-card h1 {
    margin-bottom: 12px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 14px;
    transition: color 0.3s ease;
}

.message {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.6;
    margin-bottom: 32px;
    transition: color 0.3s ease;
}

.loading-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 24px;
    background: var(--loading-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    transition: background 0.3s ease;
}

.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--loading-border);
    border-top-color: var(--loading-spinner);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.loading-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 200px;
}

.error-message {
    background: var(--error-bg);
    border: 1px solid var(--error-border);
    color: var(--error-text);
    padding: 12px 16px;
    border-radius: 12px;
    margin-bottom: 24px;
    font-size: 14px;
    text-align: center;
    transition: background 0.3s ease, border 0.3s ease, color 0.3s ease;
}

.info-text {
    text-align: center;
    color: var(--text-muted);
    font-size: 13px;
    margin-top: 24px;
    line-height: 1.6;
    transition: color 0.3s ease;
}

/* Custom Authentication UI Styles */
.auth-methods {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.auth-button {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--card-border);
    border-radius: 8px;
    background: var(--card-bg);
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    position: relative;
    min-height: 48px;
}

.auth-button:hover {
    background: var(--loading-bg);
    box-shadow: 0 2px 8px var(--card-shadow);
}

.auth-button:active {
    transform: translateY(0);
}

.auth-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.auth-button:disabled:hover {
    background: var(--card-bg);
    transform: none;
    box-shadow: none;
}

.sso-icon {
    width: 24px;
    height: 24px;
}

.email-button {
    background: #1a73e8;
    color: #ffffff;
    border-color: #1a73e8;
}

.email-button:hover {
    background: #1765c1;
    border-color: #1765c1;
}

.button-icon {
    flex-shrink: 0;
}

.button-loading {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.button-loading-overlay {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 16px;
    background: #1a73e8;
    color: #ffffff;
    border-radius: 8px;
    font-size: 14px;
    min-height: 48px;
}

.divider {
    display: flex;
    align-items: center;
    text-align: center;
    margin: 8px 0;
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--card-border);
}

.divider span {
    padding: 0 16px;
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
}

.email-section {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.input-group label {
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
}

.input-group input {
    padding: 12px 16px;
    border: 1px solid var(--card-border);
    border-radius: 8px;
    background: var(--card-bg);
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    transition: all 0.2s ease;
}

.input-group input:focus {
    outline: none;
    border-color: #1a73e8;
    box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.1);
}

.input-group input::placeholder {
    color: var(--text-muted);
}

.email-sent-message {
    padding: 16px;
    background: rgba(52, 168, 83, 0.1);
    border: 1px solid rgba(52, 168, 83, 0.3);
    border-radius: 8px;
    color: var(--text-primary);
    text-align: center;
    font-size: 14px;
    line-height: 1.5;
}

.loading-container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 200px;
    text-align: center;
}

.loading-container p {
    color: var(--text-secondary);
    font-size: 14px;
    margin-top: 16px;
}

@media (prefers-color-scheme: dark) {
    .email-sent-message {
        background: rgba(52, 168, 83, 0.15);
        border-color: rgba(52, 168, 83, 0.4);
    }
}

@media (max-width: 480px) {
    .login-card {
        padding: 32px 24px;
    }

    .auth-button {
        padding: 14px 16px;
        font-size: 15px;
    }

    .button-icon {
        width: 18px;
        height: 18px;
    }
}