/* ==================== VARIABLES ==================== */
:root {
    --primary-color: #3B82F6;
    --primary-hover: #2563EB;
    --dark: #0F172A;
    --gray: #64748B;
    --gray-light: #E2E8F0;
    --white: #FFFFFF;
    --error: #DC2626;
    --error-bg: #FEE2E2;
    --success: #16A34A;
    --success-bg: #D1FAE5;
    --border-radius: 0.5rem;
    --transition: 0.3s ease;
}

/* ==================== RESET & BASE ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--dark);
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: var(--transition);
}

a:hover {
    color: var(--primary-hover);
}

/* ==================== AUTH CONTAINER ==================== */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 2rem;
}

.auth-card {
    background: var(--white);
    border-radius: 1rem;
    padding: 3rem;
    max-width: 450px;
    width: 100%;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

/* ==================== LOGO HEADER ==================== */
.logo-header {
    text-align: center;
    margin-bottom: 2rem;
}

.logo-header a {
    color: var(--primary-color);
}

.logo-header h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
}

/* ==================== HEADINGS ==================== */
h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    text-align: center;
    color: var(--dark);
}

.auth-subtitle {
    text-align: center;
    color: var(--gray);
    margin-bottom: 2rem;
    font-size: 0.95rem;
}

/* ==================== FORM ==================== */
.auth-form {
    margin-bottom: 1.5rem;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--dark);
    font-size: 0.95rem;
}

.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="text"] {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--gray-light);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
    font-family: inherit;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-hint {
    display: block;
    margin-top: 0.5rem;
    font-size: 0.875rem;
    color: var(--gray);
}

/* ==================== CHECKBOX ==================== */
.form-group.checkbox {
    display: flex;
    align-items: center;
}

.form-group.checkbox label {
    display: flex;
    align-items: center;
    margin-bottom: 0;
    cursor: pointer;
    font-weight: 400;
}

.form-group.checkbox input[type="checkbox"] {
    width: auto;
    margin-right: 0.5rem;
    cursor: pointer;
}

/* ==================== MESSAGES ==================== */
.error-message,
.success-message {
    padding: 0.75rem 1rem;
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.error-message {
    background: var(--error-bg);
    color: var(--error);
    border-left: 4px solid var(--error);
}

.success-message {
    background: var(--success-bg);
    color: var(--success);
    border-left: 4px solid var(--success);
}

/* ==================== BUTTONS ==================== */
.btn-primary,
.btn-secondary {
    display: inline-block;
    padding: 0.75rem 2rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-size: 1rem;
    text-align: center;
}

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

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(59, 130, 246, 0.3);
}

.btn-full {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-loading {
    display: none;
}

button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* ==================== AUTH FOOTER ==================== */
.auth-footer {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--gray-light);
}

.auth-footer p {
    margin-bottom: 0.5rem;
    color: var(--gray);
    font-size: 0.95rem;
}

.link-secondary {
    color: var(--gray);
    font-size: 0.95rem;
}

.link-secondary:hover {
    color: var(--primary-color);
}

/* ==================== BACK LINK ==================== */
.auth-back {
    text-align: center;
    margin-top: 1.5rem;
}

.btn-back {
    color: var(--gray);
    font-size: 0.95rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-back:hover {
    color: var(--primary-color);
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 480px) {
    .auth-container {
        padding: 1rem;
    }

    .auth-card {
        padding: 2rem 1.5rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    .logo-header h1 {
        font-size: 1.75rem;
    }
}