/* ========================================
   ОБЩИЕ СТИЛИ (как на главной странице)
   ======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background: linear-gradient(135deg, #1a1a2e, #16213e);
    color: #e6e6e6;
    min-height: 100vh;
    padding: 20px;
}

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

/* ========================================
   ХЕДЕР (единый для всего сайта)
   ======================================== */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
    border-bottom: 1px solid #3a3a5a;
    margin-bottom: 30px;
}

.logo {
    height: 60px;
    filter: drop-shadow(0 0 5px #ff0000);
}

nav {
    display: flex;
    gap: 20px;
    font-weight: 600;
}

nav a {
    color: #ffffff;
    text-decoration: none;
    padding: 8px 15px;
    border-radius: 4px;
    transition: all 0.3s;
}

nav a:hover {
    background: rgba(255, 0, 0, 0.2);
}

nav a.active {
    background: rgba(255, 0, 0, 0.2);
}

/* ========================================
   КАЛЬКУЛЯТОР: СПЕЦИФИЧЕСКИЕ СТИЛИ
   ======================================== */
h1 {
    text-align: center;
    color: #ff0000;
    margin-bottom: 25px;
    font-size: 2.2rem;
    text-shadow: 0 0 10px rgba(255, 0, 0, 0.5);
}

.main-content {
    display: flex;
    gap: 30px;
    margin-bottom: 50px;
}

.calculator-section,
.results-section {
    flex: 1;
    background: rgba(26, 26, 46, 0.7);
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(10px);
    border: 1px solid #3a3a5a;
}

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

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #cccccc;
}

input, select, textarea {
    width: 100%;
    padding: 12px 15px;
    background: rgba(30, 30, 50, 0.7);
    border: 1px solid #4a4a6a;
    border-radius: 8px;
    color: #ffffff;
    font-size: 1rem;
    transition: all 0.3s;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: #ff0000;
    box-shadow: 0 0 0 2px rgba(255, 0, 0, 0.3);
}

.btn {
    background: linear-gradient(to right, #ff0000, #cc0000);
    color: white;
    border: none;
    padding: 14px 25px;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 8px;
    width: 100%;
    cursor: pointer;
    transition: all 0.3s;
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: 0 4px 15px rgba(255, 0, 0, 0.4);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 0, 0, 0.6);
}

.btn:active {
    transform: translateY(0);
}

/* Капча */
.captcha-section {
    background: rgba(30, 30, 50, 0.7);
    border-radius: 10px;
    padding: 15px;
    margin-top: 20px;
    display: none;
}

.captcha-question {
    text-align: center;
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: #ffcc00;
}

/* Результаты */
.results {
    display: none;
}

.result-item {
    display: flex;
    justify-content: space-between;
    padding: 15px 0;
    border-bottom: 1px solid #3a3a5a;
}

.result-label {
    color: #999999;
    font-weight: 500;
}

.result-value {
    font-weight: 700;
    color: #ffffff;
    font-size: 1.1rem;
}

.total-result {
    font-size: 1.4rem;
    color: #ff0000;
    font-weight: 800;
    margin-top: 15px;
    padding-top: 15px;
    border-top: 2px dashed #555555;
}

/* Утильсбор */
.utyl-button {
    background: linear-gradient(to right, #3a3a5a, #2a2a4a);
    border: 1px dashed #ff0000;
    color: #ff0000;
    width: 100%;
    padding: 12px;
    margin-top: 10px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s;
    text-align: center;
}

.utyl-button:hover {
    background: rgba(255, 0, 0, 0.1);
}

.utyl-form {
    display: none;
    margin-top: 25px;
    padding-top: 20px;
    border-top: 1px solid #3a3a5a;
}

.form-group-input {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 15px;
}

.form-group-input input {
    padding: 12px 15px;
    background: rgba(30, 30, 50, 0.7);
    border: 1px solid #4a4a6a;
    border-radius: 8px;
    color: #ffffff;
    font-size: 1rem;
}

/* Подсказки под полями */
.input-unit {
    font-size: 0.8em;
    color: #aaa;
    margin-top: 5px;
    font-style: italic;
}

/* Переключатель единиц измерения */
.unit-toggle {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin: 10px 0;
}

.unit-toggle button {
    background: #333;
    color: #fff;
    border: none;
    padding: 5px 10px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s;
}

.unit-toggle button.active {
    background: #ff0000;
    color: white;
}

/* Подсветка важного блока */
.highlight {
    background: rgba(255, 0, 0, 0.15);
    border-radius: 8px;
    padding: 15px;
    margin-top: 20px;
    border-left: 3px solid #ff0000;
}

.highlight p {
    color: #cccccc;
    line-height: 1.6;
    font-size: 0.95rem;
}

.highlight strong {
    color: #ffcc00;
}

/* ========================================
   ФУТЕР (единый для всего сайта)
   ======================================== */
footer {
    text-align: center;
    padding: 20px 0;
    border-top: 1px solid #3a3a5a;
    color: #888888;
    font-size: 0.9rem;
    margin-top: 50px;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 15px;
}

.contact-links a {
    color: #ff0000;
    text-decoration: none;
    transition: all 0.3s;
    font-weight: 500;
}

.contact-links a:hover {
    text-decoration: underline;
    color: #ff3333;
}

/* ========================================
   АДАПТИВНОСТЬ
   ======================================== */
@media (max-width: 768px) {
    .main-content {
        flex-direction: column;
    }
    
    .calculator-section, 
    .results-section {
        padding: 20px;
    }
    
    h1 {
        font-size: 1.8rem;
    }
    
    nav {
        flex-direction: column;
        gap: 10px;
        align-items: flex-start;
    }
    
    .unit-toggle {
        flex-direction: column;
        align-items: stretch;
    }
    
    .unit-toggle button {
        width: 100%;
    }
    
    .result-item {
        flex-direction: column;
        gap: 5px;
    }
    
    .result-value {
        font-size: 1.3rem;
        text-align: right;
    }
    
    .total-result {
        font-size: 1.6rem;
    }
}

@media (max-width: 480px) {
    body {
        padding: 10px;
    }
    
    .container {
        padding: 0 5px;
    }
    
    h1 {
        font-size: 1.6rem;
        margin-bottom: 15px;
    }
    
    .btn {
        padding: 12px;
        font-size: 1rem;
    }
    
    footer {
        font-size: 0.8rem;
        padding: 15px 0;
    }
    
    .contact-links {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .contact-links a {
        font-size: 0.85rem;
    }
}