:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --success: #10b981;
    --error: #ef4444;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --border: #e5e7eb;
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

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

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

.auth-container {
    width: 100%;
    max-width: 440px;
}

.auth-card {
    background: var(--bg-primary);
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    padding: 40px;
    animation: fadeIn 0.4s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.auth-header h1 {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
}

.auth-header p {
    font-size: 16px;
    color: var(--text-secondary);
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

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

.form-group label {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.form-group input {
    padding: 12px 16px;
    font-size: 15px;
    border: 2px solid var(--border);
    border-radius: 8px;
    transition: all 0.2s;
    background: var(--bg-primary);
    color: var(--text-primary);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group input:disabled {
    background: var(--bg-secondary);
    cursor: not-allowed;
    opacity: 0.6;
}

.form-group input.error {
    border-color: var(--error);
}

.error-message {
    font-size: 13px;
    color: var(--error);
    display: none;
    margin-top: -4px;
}

.error-message.visible {
    display: block;
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: -8px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-secondary);
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--primary);
}

.link {
    font-size: 14px;
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s;
}

.link:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

.btn {
    padding: 12px 24px;
    font-size: 15px;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    position: relative;
}

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

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

.btn-primary:hover:not(:disabled) {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
}

.btn-loader {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

.form-error {
    padding: 12px 16px;
    background: #fee;
    border: 1px solid var(--error);
    border-radius: 8px;
    color: var(--error);
    font-size: 14px;
    animation: shake 0.4s;
}

.form-success {
    padding: 12px 16px;
    background: #efe;
    border: 1px solid var(--success);
    border-radius: 8px;
    color: var(--success);
    font-size: 14px;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

.auth-footer {
    text-align: center;
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}

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

.auth-divider {
    position: relative;
    text-align: center;
    margin: 24px 0;
}

.auth-divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--border);
}

.auth-divider span {
    position: relative;
    background: var(--bg-primary);
    padding: 0 16px;
    font-size: 13px;
    color: var(--text-secondary);
}

.social-login {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.btn-social {
    background: var(--bg-primary);
    border: 2px solid var(--border);
    color: var(--text-primary);
    justify-content: flex-start;
    padding-left: 16px;
}

.btn-social:hover:not(:disabled) {
    background: var(--bg-secondary);
    border-color: var(--text-secondary);
}

.btn-social svg {
    margin-right: 12px;
}

.btn-facebook {
    background: #1877F2;
    border-color: #1877F2;
    color: white;
}

.btn-facebook:hover:not(:disabled) {
    background: #166FE5;
    border-color: #166FE5;
}

/* Responsive */
@media (max-width: 480px) {
    .auth-card {
        padding: 32px 24px;
    }

    .auth-header h1 {
        font-size: 28px;
    }

    .form-options {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
}

/* Register page specific */
.tab-switch {
    display: flex;
    gap: 8px;
    background: var(--bg-secondary);
    padding: 4px;
    border-radius: 8px;
    margin-bottom: 24px;
}

.tab-switch button {
    flex: 1;
    padding: 10px;
    background: transparent;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.tab-switch button.active {
    background: var(--bg-primary);
    color: var(--primary);
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.verification-code {
    display: flex;
    gap: 12px;
    justify-content: center;
}

.verification-code input {
    width: 50px;
    height: 56px;
    text-align: center;
    font-size: 24px;
    font-weight: 700;
    border: 2px solid var(--border);
    border-radius: 8px;
}

.verification-code input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.resend-code {
    text-align: center;
    margin-top: 16px;
    font-size: 14px;
    color: var(--text-secondary);
}

.resend-code button {
    background: none;
    border: none;
    color: var(--primary);
    font-weight: 600;
    cursor: pointer;
    text-decoration: underline;
}

.resend-code button:disabled {
    color: var(--text-secondary);
    cursor: not-allowed;
    text-decoration: none;
}

/* Dashboard */
.dashboard-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
}

.dashboard-header {
    background: white;
    padding: 24px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    margin-bottom: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.user-info h2 {
    font-size: 24px;
    margin-bottom: 8px;
}

.user-role {
    display: inline-block;
    padding: 4px 12px;
    background: var(--primary-light);
    color: white;
    border-radius: 16px;
    font-size: 12px;
    font-weight: 600;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.dashboard-card {
    background: white;
    padding: 24px;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.dashboard-card h3 {
    font-size: 18px;
    margin-bottom: 16px;
    color: var(--text-primary);
}