:root {
    --primary-red: #D32F2F;
    --primary-dark: #B71C1C;
    --white: #FFFFFF;
    --black: #000000;
    --gray-light: #F5F5F5;
    --gray-medium: #E0E0E0;
    --gray-dark: #757575;
    --success: #388E3C;
    --error: #D32F2F;
}

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

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--black);
    background-color: var(--gray-light);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.container-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Header */
.main-header {
    background-color: var(--white);
    padding: 15px 0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: 700;
}

.logo-text {
    color: var(--black);
}

.logo-accent {
    color: var(--primary-red);
}

.main-nav a {
    text-decoration: none;
    color: var(--black);
    margin-left: 20px;
    font-weight: 500;
}

/* Buttons */
.btn-primary {
    background-color: var(--primary-red);
    color: var(--white) !important;
    padding: 8px 20px;
    border-radius: 4px;
    transition: background 0.3s;
}

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

.btn-outline {
    background-color: transparent;
    color: var(--primary-red) !important;
    border: 2px solid var(--primary-red);
    padding: 6px 15px;
    border-radius: 4px;
    transition: all 0.3s;
    cursor: pointer;
    font-weight: 600;
}

.btn-outline:hover {
    background-color: var(--primary-red);
    color: var(--white) !important;
}

/* Forms */
.auth-container {
    max-width: 400px;
    margin: 60px auto;
    background: var(--white);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.auth-container h2 {
    margin-bottom: 20px;
    text-align: center;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--gray-medium);
    border-radius: 4px;
}

.btn-block {
    width: 100%;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
}

/* Alerts */
.alert {
    padding: 15px;
    border-radius: 4px;
    margin-bottom: 20px;
}

.alert-success {
    background: #E8F5E9;
    color: var(--success);
    border: 1px solid #C8E6C9;
}

.alert-error {
    background: #FFEBEE;
    color: var(--error);
    border: 1px solid #FFCDD2;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }

    .main-nav a {
        margin-left: 10px;
        font-size: 0.9rem;
    }
}