/* 
 * Леонидия - Стоматологический центр
 * Современные стили для профессиональной стоматологии
 */

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Primary Colors */
    --primary-color: #2C5282;
    --primary-light: #3182CE;
    --primary-dark: #1A365D;
    
    /* Secondary Colors */
    --secondary-color: #38B2AC;
    --secondary-light: #4FD1C7;
    --secondary-dark: #285E61;
    
    /* Accent Colors */
    --accent-color: #E53E3E;
    --accent-light: #FC8181;
    
    /* Neutral Colors */
    --white: #FFFFFF;
    --gray-50: #F7FAFC;
    --gray-100: #EDF2F7;
    --gray-200: #E2E8F0;
    --gray-300: #CBD5E0;
    --gray-400: #A0AEC0;
    --gray-500: #718096;
    --gray-600: #4A5568;
    --gray-700: #2D3748;
    --gray-800: #1A202C;
    --gray-900: #171923;
    
    /* Typography */
    --font-primary: 'Inter', system-ui, -apple-system, sans-serif;
    --font-heading: 'Playfair Display', Georgia, serif;
    
    /* Spacing */
    --container-max-width: 1200px;
    --section-padding: 80px 0;
    --border-radius: 8px;
    --border-radius-lg: 12px;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--gray-700);
    font-size: 16px;
    background-color: var(--white);
}

/* Container */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 20px;
}

@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--gray-800);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }

p {
    margin-bottom: 1rem;
}

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

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    font-size: 16px;
    line-height: 1;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover {
    background-color: var(--secondary-dark);
    border-color: var(--secondary-dark);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

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

.btn-full {
    width: 100%;
    justify-content: center;
}

.btn-link {
    background: none;
    border: none;
    color: var(--primary-color);
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
}

.btn-link:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* Header */
.header {
    background-color: var(--white);
    box-shadow: var(--shadow-sm);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
}

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
}

.logo {
    flex-shrink: 0;
}

.logo-img {
    height: 50px;
    width: auto;
}

/* Navigation Menu */
.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-item {
    position: relative;
}

.nav-link {
    color: var(--gray-700);
    font-weight: 500;
    padding: 0.5rem 0;
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
}

/* Dropdown Menu */
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--white);
    box-shadow: var(--shadow-lg);
    border-radius: var(--border-radius);
    min-width: 220px;
    padding: 0.5rem 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition);
    list-style: none;
}

.nav-item:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-link {
    display: block;
    padding: 0.5rem 1rem;
    color: var(--gray-700);
    transition: var(--transition);
}

.dropdown-link:hover {
    background-color: var(--gray-50);
    color: var(--primary-color);
}

/* Header Contact */
.header-contact {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.phone-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--gray-700);
    font-weight: 500;
}

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

.appointment-btn {
    background-color: var(--accent-color);
    color: var(--white);
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.appointment-btn:hover {
    background-color: var(--accent-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Mobile Menu Toggle */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 0.5rem;
}

.hamburger .bar {
    width: 25px;
    height: 3px;
    background-color: var(--gray-700);
    margin: 3px 0;
    transition: var(--transition);
}

/* Mobile Styles */
@media (max-width: 1024px) {
    .nav-menu {
        gap: 1rem;
    }
    
    .header-contact .phone-link {
        display: none;
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-lg);
        padding: 2rem 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background-color: var(--gray-50);
        margin-top: 0.5rem;
    }
    
    .header-contact {
        gap: 0.5rem;
    }
    
    .appointment-btn {
        padding: 0.5rem 1rem;
        font-size: 14px;
    }
}

/* Hero Section */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, 
        rgba(44, 82, 130, 0.8) 0%, 
        rgba(56, 178, 172, 0.6) 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
    color: var(--white);
    max-width: 600px;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    margin-bottom: 1.5rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.accent-text {
    color: var(--secondary-light);
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2vw, 1.3rem);
    margin-bottom: 2rem;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
    line-height: 1.5;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.hero-features {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    opacity: 0.9;
}

.feature-item i {
    color: var(--secondary-light);
    font-size: 1.2rem;
}

@media (max-width: 768px) {
    .hero {
        height: 80vh;
        min-height: 500px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .hero-features {
        flex-direction: column;
        gap: 1rem;
    }
}

/* Section Styles */
section {
    padding: var(--section-padding);
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.section-title {
    color: var(--gray-800);
    margin-bottom: 1rem;
}

.section-subtitle {
    color: var(--gray-600);
    font-size: 1.1rem;
}

/* Services Section */
.services {
    background-color: var(--gray-50);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.service-card {
    background-color: var(--white);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.service-image {
    height: 200px;
    overflow: hidden;
}

.service-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.service-card:hover .service-image img {
    transform: scale(1.05);
}

.service-content {
    padding: 1.5rem;
}

.service-title {
    color: var(--gray-800);
    margin-bottom: 0.5rem;
}

.service-description {
    color: var(--gray-600);
    margin-bottom: 1rem;
    line-height: 1.5;
}

.service-link {
    color: var(--primary-color);
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.service-link:hover {
    color: var(--primary-dark);
    transform: translateX(5px);
}

@media (max-width: 768px) {
    .services-grid {
        grid-template-columns: 1fr;
    }
}

/* About Section */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-features {
    margin: 2rem 0;
}

.feature {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.feature-icon {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.feature-text h4 {
    margin-bottom: 0.25rem;
    color: var(--gray-800);
}

.feature-text p {
    color: var(--gray-600);
    margin: 0;
}

.about-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.about-image img {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
}

@media (max-width: 768px) {
    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .about-buttons {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* Contact Section */
.contact {
    background-color: var(--gray-50);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info {
    display: grid;
    gap: 1.5rem;
}

.contact-card {
    display: flex;
    gap: 1rem;
    padding: 1.5rem;
    background-color: var(--white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.contact-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.contact-icon {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    background-color: var(--secondary-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.contact-details h4 {
    margin-bottom: 0.5rem;
    color: var(--gray-800);
}

.contact-details p {
    margin: 0;
    color: var(--gray-600);
}

.contact-details a {
    color: var(--primary-color);
    font-weight: 500;
}

.contact-details small {
    color: var(--gray-500);
    font-size: 0.85rem;
}

/* Appointment Form */
.appointment-form {
    background-color: var(--white);
    padding: 2rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
}

.appointment-form h3 {
    margin-bottom: 1.5rem;
    color: var(--gray-800);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--gray-700);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--gray-200);
    border-radius: var(--border-radius);
    font-size: 16px;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(44, 82, 130, 0.1);
}

@media (max-width: 768px) {
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
}

/* Footer */
.footer {
    background-color: var(--gray-800);
    color: var(--gray-300);
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.footer-logo img {
    height: 40px;
    width: auto;
}

.footer-logo h3 {
    color: var(--white);
    margin: 0;
    font-size: 1.1rem;
}

.footer-description {
    color: var(--gray-400);
    line-height: 1.6;
}

.footer-section h4 {
    color: var(--white);
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: var(--gray-300);
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--secondary-light);
}

.footer-contact {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-item {
    display: flex;
    gap: 0.75rem;
    align-items: flex-start;
}

.contact-item i {
    color: var(--secondary-color);
    margin-top: 0.1rem;
    flex-shrink: 0;
}

.contact-item a {
    color: var(--gray-300);
    transition: var(--transition);
}

.contact-item a:hover {
    color: var(--secondary-light);
}

/* Footer Bottom */
.footer-bottom {
    border-top: 1px solid var(--gray-700);
    padding-top: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-legal {
    flex: 1;
}

.legal-info {
    margin-top: 0.5rem;
    color: var(--gray-500);
}

.footer-social {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: var(--gray-700);
    color: var(--gray-300);
    border-radius: 50%;
    transition: var(--transition);
}

.social-link:hover {
    background-color: var(--secondary-color);
    color: var(--white);
    transform: translateY(-2px);
}

/* Scroll to Top Button */
.scroll-top-btn {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.scroll-top-btn.show {
    opacity: 1;
    visibility: visible;
}

.scroll-top-btn:hover {
    background-color: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

@media (max-width: 768px) {
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .scroll-top-btn {
        bottom: 1rem;
        right: 1rem;
        width: 45px;
        height: 45px;
    }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 1.5rem; }

.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 1.5rem; }

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

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

/* Loading Animation */
.loading {
    animation: fadeIn 0.5s ease-in-out;
}

/* Hover Effects */
.hover-lift:hover {
    transform: translateY(-3px);
    transition: var(--transition);
}

/* Header Scrolled State */
.header.scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
}

/* Form Validation Styles */
.form-group input.error,
.form-group select.error,
.form-group textarea.error {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(229, 62, 62, 0.1);
}

.field-error {
    color: var(--accent-color);
    font-size: 0.875rem;
    margin-top: 0.25rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.field-error::before {
    content: "⚠";
    font-size: 0.75rem;
}

/* Notification Styles */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    max-width: 400px;
    background-color: var(--white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
    border-left: 4px solid var(--primary-color);
    z-index: 10000;
    transform: translateX(450px);
    transition: var(--transition);
}

.notification.notification-success {
    border-left-color: var(--secondary-color);
}

.notification.notification-error {
    border-left-color: var(--accent-color);
}

.notification.show {
    transform: translateX(0);
}

.notification-content {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.5rem;
}

.notification-content i {
    font-size: 1.25rem;
}

.notification-success .notification-content i {
    color: var(--secondary-color);
}

.notification-error .notification-content i {
    color: var(--accent-color);
}

.notification-close {
    background: none;
    border: none;
    color: var(--gray-400);
    cursor: pointer;
    padding: 0.25rem;
    margin-left: auto;
    transition: var(--transition);
}

.notification-close:hover {
    color: var(--gray-600);
}

/* Animation Classes */
.animate-in {
    animation: fadeInUp 0.6s ease-out forwards;
}

.page-loaded {
    animation: fadeIn 0.5s ease-out;
}

/* Page Transitions */
body.menu-open {
    overflow: hidden;
}

/* Mobile Menu Active States */
.hamburger.active .bar:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active .bar:nth-child(2) {
    opacity: 0;
}

.hamburger.active .bar:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Loading States for Buttons */
.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

.btn .fa-spinner {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Enhanced Service Card Interactions */
.service-card {
    cursor: pointer;
}

.service-card:active {
    transform: translateY(-2px) scale(0.98);
}

/* Improved Focus Styles for Accessibility */
input:focus,
select:focus,
textarea:focus,
button:focus,
.btn:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #000080;
        --gray-700: #000000;
        --gray-600: #333333;
    }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}

/* Print Styles */
@media print {
    .header,
    .hamburger,
    .scroll-top-btn,
    .appointment-btn,
    .btn,
    .notification {
        display: none !important;
    }
    
    .hero {
        height: auto !important;
        min-height: auto !important;
    }
    
    .hero-background {
        display: none;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.5;
        color: #000 !important;
        background: #fff !important;
    }
}