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

:root {
    --primary: #667eea;
    --primary-dark: #5a67d8;
    --text-dark: #1a202c;
    --text-light: #718096;
    --bg-light: #f7fafc;
    --white: #ffffff;
    --border: #e2e8f0;
    --error: #f56565;
    --success: #48bb78;
    --gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    background: var(--gradient);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.auth-container {
    width: 100%;
    max-width: 450px;
}

.auth-box {
    background: var(--white);
    padding: 3rem;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.logo-icon {
    font-size: 2.5rem;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-dark);
}

h1 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.subtitle {
    text-align: center;
    color: var(--text-light);
    margin-bottom: 2rem;
}

/* Alerts */
.alert {
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.alert-error {
    background: #fff5f5;
    color: var(--error);
    border: 1px solid #feb2b2;
}

.alert-success {
    background: #f0fff4;
    color: var(--success);
    border: 1px solid #9ae6b4;
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-dark);
}

.form-group input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
}

.form-group small {
    display: block;
    margin-top: 0.25rem;
    color: var(--text-light);
    font-size: 0.875rem;
}

.form-group-check {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.form-group-check input[type="checkbox"] {
    width: auto;
}

.form-group-check label {
    margin: 0;
    font-weight: normal;
    color: var(--text-light);
}

/* Buttons */
.btn-primary {
    background: var(--gradient);
    color: var(--white);
    padding: 0.875rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.btn-full {
    width: 100%;
}

/* Footer */
.auth-footer {
    margin-top: 2rem;
    text-align: center;
}

.auth-footer p {
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

.auth-footer a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
}

.auth-footer a:hover {
    text-decoration: underline;
}

/* Two column form row */
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

@media (max-width: 600px) {
    .form-row {
        grid-template-columns: 1fr;
    }
}