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

body {
    background-color: rgb(48, 46, 46);
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: white;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== HEADER STYLES ===== */
.site-header {
    background-color: #08457e;
    color: white;
    padding: 40px 0;
}

.header-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.site-title {
    font-size: clamp(2rem, 5vw, 3.75rem);
    margin-bottom: 15px;
    font-weight: bold;
}

.site-subtitle {
    font-size: clamp(1.125rem, 2.5vw, 2.25rem);
    opacity: 0.9;
    font-weight: normal;
}

/* ===== DIVIDER LINE ===== */
.divider-line {
    background-color: #ffffff;
    height: 3px;
}

/* ===== REGISTRATION SECTION ===== */
.registration-section {
    background-color: #4056d3b4;
    color: white;
    padding: 60px 0;
    text-align: center;
}

.section-title {
    font-size: clamp(1.5rem, 4vw, 2.375rem);
    margin-bottom: 40px;
    font-weight: bold;
}

.registration-form {
    max-width: 400px;
    margin: 0 auto 30px;
}

.form-group {
    margin-bottom: 25px;
    text-align: left;
}

.form-group label {
    display: block;
    font-weight: bold;
    margin-bottom: 8px;
    font-size: clamp(0.875rem, 2vw, 1rem);
}

/* ===== INPUT FIELDS ===== */
.form-group input {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #000000;
    border-radius: 5px;
    font-size: 1rem;
    background: white;
    transition: all 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: #08457e;
    box-shadow: 0 0 5px rgba(8, 69, 126, 0.5);
}

/* ===== SUBMIT BUTTON ===== */
.submit-btn {
    background-color: #007BFF;
    color: white;
    border: none;
    border-radius: 5px;
    padding: 15px 30px;
    font-size: clamp(1rem, 2vw, 1.25rem);
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
    margin-top: 10px;
}

.submit-btn:hover {
    background-color: #0056b3;
    transform: translateY(-2px);
}

.login-link {
    margin: 20px 0;
}

.login-link a {
    color: white;
    text-decoration: none;
    font-size: clamp(0.875rem, 2vw, 1rem);
}

.login-link a:hover {
    text-decoration: underline;
}

.error-message {
    margin-top: 20px;
    padding: 15px;
    background: rgba(231, 76, 60, 0.2);
    border-radius: 5px;
    border-left: 4px solid #e74c3c;
}

.error-message h3 {
    color: #ffebee;
    font-size: clamp(0.875rem, 2vw, 1rem);
}

/* ===== FOOTER SECTION ===== */
.footer-section {
    background-color: #2b2a27;
    color: white;
    padding: 30px 0;
}

.footer-content {
    text-align: center;
}

.footer-content h2 {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    margin-bottom: 10px;
    font-weight: normal;
}

.footer-content h3 {
    font-size: clamp(0.875rem, 2vw, 1rem);
    opacity: 0.8;
}

/* ===== АВАТАРЫ И ДОПОЛНИТЕЛЬНЫЕ СТИЛИ ===== */
.avatar-large {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid #ddd;
}

.avatar-medium {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
    margin-right: 10px;
}

.avatar-small {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    margin-right: 10px;
    vertical-align: middle;
}

.avatar-tiny {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    object-fit: cover;
    margin-right: 8px;
    vertical-align: middle;
}

.avatar-section {
    text-align: center;
    margin: 20px 0;
}

.avatar-section form {
    margin-top: 10px;
}

.message-content {
    margin-left: 60px;
    padding: 5px 0;
}

/* ===== МЕДИА-ЗАПРОСЫ (ТОЛЬКО НУЖНЫЕ) ===== */

/* Планшеты */
@media (max-width: 1024px) {
    .container {
        padding: 0 15px;
    }
    
    .site-header {
        padding: 30px 0;
    }
    
    .registration-section {
        padding: 40px 0;
    }
    
    .registration-form {
        max-width: 380px;
    }
}

/* Большие телефоны */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .site-header {
        padding: 25px 0;
    }
    
    .registration-section {
        padding: 30px 0;
    }
    
    .registration-form {
        max-width: 350px;
    }
}

/* Мобильные телефоны */
@media (max-width: 480px) {
    .container {
        padding: 0 10px;
    }
    
    .site-header {
        padding: 20px 0;
    }
    
    .registration-section {
        padding: 25px 0;
    }
    
    .registration-form {
        max-width: 80%;
    }
    
    .section-title {
        margin-bottom: 30px;
    }
}

/* Очень маленькие телефоны */
@media (max-width: 360px) {
    .container {
        padding: 0 8px;
    }
    
    .site-title {
        font-size: 1.75rem;
    }
    
    .site-subtitle {
        font-size: 1rem;
    }
}