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

:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --background: #f8fafc;
    --surface: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-container {
    background: white;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    max-width: 450px;
    width: 100%;
    padding: 48px 40px;
}

.logo-section {
    text-align: center;
    margin-bottom: 40px;
}

.logo-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 28px;
    margin-bottom: 16px;
}

.logo-section h1 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.logo-section p {
    color: var(--text-secondary);
    font-size: 14px;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 14px;
}

.form-group input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    transition: all 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.error-message,
.success-message {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 20px;
    display: none;
    font-size: 14px;
}

.error-message {
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: #991b1b;
}

.success-message {
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
    color: #166534;
}

.btn-login {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(37, 99, 235, 0.4);
}

.btn-login:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.spinner {
    display: none;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top: 3px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading .spinner {
    display: block;
}

.loading .btn-text {
    display: none;
}

.dev-helper {
    background: #f8fafc;
    border-radius: 12px;
    padding: 20px;
    margin-top: 32px;
    border: 1px solid var(--border-color);
}

.dev-helper h3 {
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.credentials-row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.credentials-row label {
    font-size: 13px;
    color: var(--text-secondary);
    min-width: 80px;
    font-weight: 500;
}

.credentials-row code {
    flex: 1;
    background: white;
    padding: 8px 12px;
    border-radius: 6px;
    font-family: 'Courier New', monospace;
    color: var(--primary-color);
    font-size: 13px;
    border: 1px solid var(--border-color);
}

.btn-copy {
    padding: 6px 12px;
    border: 1px solid var(--border-color);
    background: white;
    color: var(--text-primary);
    border-radius: 6px;
    cursor: pointer;
    font-size: 12px;
    font-weight: 500;
    transition: all 0.2s;
}

.btn-copy:hover {
    background: #f8fafc;
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-quick-login {
    width: 100%;
    margin-top: 16px;
    padding: 12px;
    background: linear-gradient(135deg, #10b981, #059669);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-quick-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(16, 185, 129, 0.4);
}

.dev-notice {
    margin-top: 16px;
    padding: 12px;
    background: #fef3c7;
    border: 1px solid #fde68a;
    border-radius: 6px;
    font-size: 12px;
    color: #92400e;
    text-align: center;
}