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

body {
    font-family: 'Inter', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: #2C3E50;
    background-color: #F8F9FA;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Темная тема */
body.dark-theme {
    background-color: #1a1a1a;
    color: #e0e0e0;
}

body.dark-theme .header {
    background-color: #2d2d2d;
    box-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

body.dark-theme .logo {
    color: #6ab7ff;
}

body.dark-theme .nav a {
    color: #e0e0e0;
}

body.dark-theme .nav a:hover {
    color: #6ab7ff;
}

body.dark-theme .card {
    background: #2d2d2d;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
}

body.dark-theme .tip-card {
    background-color: #333;
}

body.dark-theme .tip-card:hover {
    background-color: #444;
}

body.dark-theme .footer {
    background-color: #2d2d2d;
}

body.dark-theme .calculator {
    background: #2d2d2d;
    border: 1px solid #444;
}

body.dark-theme .form-group input,
body.dark-theme .form-group select,
body.dark-theme .form-group textarea {
    background-color: #333;
    border-color: #555;
    color: #e0e0e0;
}

body.dark-theme .form-group input:focus,
body.dark-theme .form-group select:focus,
body.dark-theme .form-group textarea:focus {
    border-color: #6ab7ff;
    box-shadow: 0 0 0 2px rgba(74, 144, 226, 0.3);
}

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

h1, h2, h3, h4, h5, h6 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 15px;
}

h1 {
    font-size: 36px;
    animation: fadeInDown 0.8s ease-out;
}

h2 {
    font-size: 30px;
    animation: fadeInUp 0.6s ease-out;
}

h3 {
    font-size: 24px;
}

a {
    text-decoration: none;
    color: #4A90E2;
    transition: color 0.3s ease;
}

a:hover {
    text-decoration: underline;
    color: #3a7bc8;
}

/* Анимации */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.fade-in { animation: fadeIn 0.5s ease-out; }
.fade-in-up { animation: fadeInUp 0.6s ease-out; }
.fade-in-down { animation: fadeInDown 0.6s ease-out; }

.btn-primary, .btn-secondary {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 6px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background-color: #4A90E2;
    color: white;
}

.btn-primary:hover {
    background-color: #3a7bc8;
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(74, 144, 226, 0.4);
}

.btn-secondary {
    background-color: #50C878;
    color: white;
    font-size: 14px;
    padding: 8px 16px;
}

.btn-secondary:hover {
    background-color: #42b769;
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(80, 200, 120, 0.4);
}

/* Хедер */
.header {
    background-color: white;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: all 0.3s ease;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.logo {
    font-family: 'Montserrat', sans-serif;
    font-size: 24px;
    font-weight: 700;
    color: #4A90E2;
    animation: slideInLeft 0.8s ease-out;
}

.nav a {
    margin-right: 25px;
    color: #2C3E50;
    font-weight: 500;
    transition: all 0.3s ease;
}

.nav a:hover {
    color: #4A90E2;
    text-decoration: none;
    transform: translateY(-2px);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.theme-toggle {
    background: none;
    border: none;
    font-size: 20px;
    cursor: pointer;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    background-color: #f0f0f0;
}

body.dark-theme .theme-toggle:hover {
    background-color: #444;
}

.feedback-btn {
    background-color: #50C878;
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.feedback-btn:hover {
    background-color: #42b769;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(80, 200, 120, 0.4);
}

/* Герой-секция */
.hero {
    background: linear-gradient(135deg, #4A90E2 0%, #5fa8f0 100%);
    color: white;
    padding: 80px 0;
    text-align: center;
    animation: fadeIn 1s ease-out;
}

.hero h1 {
    margin-bottom: 20px;
    color: white;
}

.hero p {
    font-size: 18px;
    margin-bottom: 30px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Популярные инструменты */
.tools {
    padding: 60px 0;
}

.tools h2 {
    text-align: center;
    margin-bottom: 40px;
}

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.card {
    background: white;
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    text-align: center;
    transition: all 0.3s ease;
    animation: fadeInUp 0.6s ease-out;
    animation-fill-mode: both;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}

.card:nth-child(1) { animation-delay: 0.1s; }
.card:nth-child(2) { animation-delay: 0.2s; }
.card:nth-child(3) { animation-delay: 0.3s; }

.card img {
    margin-bottom: 20px;
    transition: transform 0.3s ease;
}

.card:hover img {
    transform: scale(1.1);
}

.card h3 {
    margin-bottom: 10px;
}

.card p {
    margin-bottom: 20px;
    color: #666;
}

/* Советы дня */
.tips {
    background-color: white;
    padding: 60px 0;
}

.tips h2 {
    text-align: center;
    margin-bottom: 40px;
}

.tip-card {
    display: flex;
    align-items: center;
    padding: 20px;
    background-color: #f8f9fa;
    border-radius: 8px;
    margin-bottom: 15px;
    transition: all 0.3s ease;
    animation: fadeInUp 0.6s ease-out;
}

.tip-card:hover {
    background-color: #e9ecef;
    text-decoration: none;
    transform: translateX(10px);
}

.tip-card img {
    margin-right: 15px;
    transition: transform 0.3s ease;
}

.tip-card:hover img {
    transform: rotate(10deg);
}

.tip-card span {
    color: #2C3E50;
    font-weight: 500;
}

/* Подвал */
.footer {
    background-color: #2C3E50;
    color: white;
    padding: 40px 0 20px;
}

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

.footer p {
    margin-bottom: 20px;
}

.footer-links a {
    color: #ccc;
    margin: 0 15px;
    font-size: 14px;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: white;
    text-decoration: none;
}

.social-icons {
    margin-top: 20px;
}

.social-icons a {
    margin: 0 10px;
    display: inline-block;
    transition: transform 0.3s ease;
}

.social-icons img {
    filter: brightness(0) invert(1);
    transition: transform 0.3s ease;
}

.social-icons a:hover {
    transform: translateY(-5px);
}

.social-icons img:hover {
    transform: scale(1.1);
}

/* Калькуляторы */
.calculator-section {
    margin-bottom: 50px;
    padding: 30px 0;
    border-bottom: 1px solid #eee;
    animation: fadeIn 0.8s ease-out;
}

.calculator {
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
}

body.dark-theme .calculator {
    background: #2d2d2d;
}

.calculator:hover {
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}

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

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 16px;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #4A90E2;
    box-shadow: 0 0 0 2px rgba(74, 144, 226, 0.2);
}

.result {
    margin-top: 20px;
    padding: 20px;
    background-color: #f8f9fa;
    border-radius: 6px;
    border-left: 4px solid #4A90E2;
    animation: fadeIn 0.5s ease-out;
}

body.dark-theme .result {
    background-color: #333;
    border-left-color: #6ab7ff;
}

.result p {
    margin-bottom: 10px;
}

.error {
    color: #FF6B6B;
    font-weight: 500;
}

/* Страница контактов */
.contact-content {
    max-width: 800px;
    margin: 0 auto;
}

.contact-info ul {
    list-style: none;
}

.contact-info li {
    margin-bottom: 15px;
    padding: 15px;
    background-color: #f8f9fa;
    border-radius: 6px;
    transition: transform 0.3s ease;
}

body.dark-theme .contact-info li {
    background-color: #333;
}

.contact-info li:hover {
    transform: translateX(10px);
}

.social-icons-large {
    display: flex;
    gap: 30px;
    justify-content: center;
    margin-top: 20px;
}

.social-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    color: #2C3E50;
    transition: all 0.3s ease;
}

body.dark-theme .social-link {
    color: #e0e0e0;
}

.social-link:hover {
    text-decoration: none;
    transform: translateY(-5px);
}

.social-link span {
    margin-top: 10px;
    font-weight: 500;
}

/* Адаптивность */
@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        gap: 15px;
    }
    
    .nav {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .nav a {
        margin: 5px 10px;
        font-size: 14px;
    }
    
    h1 {
        font-size: 28px;
    }
    
    h2 {
        font-size: 24px;
    }
    
    .hero {
        padding: 50px 0;
    }
    
    .cards {
        grid-template-columns: 1fr;
    }
    
    .tip-card {
        padding: 15px;
    }
    
    .header-actions {
        margin-top: 10px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    h1 {
        font-size: 24px;
    }
    
    .hero {
        padding: 40px 0;
    }
    
    .hero p {
        font-size: 16px;
    }
    
    .social-icons-large {
        flex-direction: column;
        align-items: center;
        gap: 20px;
    }
}
body.dark-theme .contact-content .contact-info li {
    background-color: #333;
    border: 1px solid #444;
}

body.dark-theme .contact-content .form-group input,
body.dark-theme .contact-content .form-group select,
body.dark-theme .contact-content .form-group textarea {
    background-color: #333;
    border-color: #555;
    color: #e0e0e0;
}

body.dark-theme .contact-content .form-group input:focus,
body.dark-theme .contact-content .form-group select:focus,
body.dark-theme .contact-content .form-group textarea:focus {
    border-color: #6ab7ff;
    box-shadow: 0 0 0 2px rgba(106, 183, 255, 0.3);
}

body.dark-theme .social-link {
    color: #e0e0e0;
}

/* Исправление темного режима для страницы "О сайте" */
body.dark-theme .about-content .form-group input,
body.dark-theme .about-content .form-group textarea {
    background-color: #333;
    border-color: #555;
    color: #e0e0e0;
}

body.dark-theme .about-content .form-group input:focus,
body.dark-theme .about-content .form-group textarea:focus {
    border-color: #6ab7ff;
    box-shadow: 0 0 0 2px rgba(106, 183, 255, 0.3);
}

body.dark-theme .idea-section {
    background-color: #333;
    border: 1px solid #444;
}
body.dark-theme .tips {
    background-color: #2d2d2d;
}

body.dark-theme .tip-card {
    background-color: #333;
    border: 1px solid #444;
}

body.dark-theme .tip-card:hover {
    background-color: #444;
}
body.dark-theme .hero {
    background: linear-gradient(135deg, #2c5aa0 0%, #3a6bc7 100%);
}

body.dark-theme .tools {
    background-color: #1a1a1a;
}

body.dark-theme .card {
    border: 1px solid #444;
}

body.dark-theme .btn-primary {
    background-color: #3a6bc7;
}

body.dark-theme .btn-primary:hover {
    background-color: #2c5aa0;
}

body.dark-theme .btn-secondary {
    background-color: #3d995f;
}

body.dark-theme .btn-secondary:hover {
    background-color: #327d4e;
}

/* Формы в темном режиме */
body.dark-theme .feedback-form {
    background-color: #333;
    border: 1px solid #444;
}

body.dark-theme select {
    background-color: #333;
    border-color: #555;
    color: #e0e0e0;
}

body.dark-theme select:focus {
    border-color: #6ab7ff;
    box-shadow: 0 0 0 2px rgba(106, 183, 255, 0.3);
}
@media (min-width: 768px) {
    #capitalization {
        transform: scale(1.3);
        margin-right: 10px;
    }
    
    .form-group input[type="checkbox"] {
        width: 20px;
        height: 20px;
    }
}

/* Улучшенные стили для чекбоксов */
.form-group input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    margin-right: 8px;
}

.form-group label[for="capitalization"] {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-weight: normal;
}

/* Адаптивность для чекбоксов */
@media (max-width: 767px) {
    .form-group label[for="capitalization"] {
        font-size: 16px;
        padding: 10px 0;
    }
}
.checkbox-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-weight: 500;
    margin-bottom: 0;
}

.checkbox-label input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
    margin-right: 12px;
    accent-color: #4A90E2;
}

.checkbox-label span {
    user-select: none;
}

body.dark-theme .checkbox-label {
    color: #e0e0e0;
}

body.dark-theme .checkbox-label input[type="checkbox"] {
    background-color: #333;
    border-color: #555;
}