/* ========================================
   Modern CSS Reset & Variables
   ======================================== */

:root {
    /* Colors */
    --color-primary: #f59e0b;
    --color-primary-dark: #d97706;
    --color-primary-light: #fbbf24;
    --color-secondary: #1f2937;
    --color-secondary-light: #374151;
    --color-background: #ffffff;
    --color-background-alt: #f9fafb;
    --color-background-dark: #111827;
    --color-text: #111827;
    --color-text-light: #6b7280;
    --color-text-muted: #9ca3af;
    --color-border: #e5e7eb;
    --color-white: #ffffff;
    --color-success: #10b981;
    --color-error: #ef4444;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    --space-32: 8rem;

    /* Layout */
    --container-max: 1280px;
    --container-padding: 1.5rem;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-base: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-base: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;
}

/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-background);
}

img, picture, video, canvas, svg {
    display: block;
    max-width: 100%;
}

input, button, textarea, select {
    font: inherit;
}

a {
    color: inherit;
    text-decoration: none;
}

ul, ol {
    list-style: none;
}

/* ========================================
   Utilities
   ======================================== */

.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* ========================================
   Buttons
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-size: var(--font-size-base);
    font-weight: 500;
    line-height: 1.5;
    border: none;
    border-radius: var(--radius-base);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

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

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

.btn--outline {
    background-color: transparent;
    color: var(--color-white);
    border: 2px solid var(--color-white);
}

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

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

.btn--white:hover {
    background-color: var(--color-background-alt);
    transform: translateY(-2px);
}

.btn--full {
    width: 100%;
}

/* ========================================
   Header
   ======================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-4) 0;
    transition: all var(--transition-base);
}

.header--scrolled {
    background-color: var(--color-white);
    box-shadow: var(--shadow-md);
    padding: var(--space-3) 0;
}

.header--scrolled .logo__text,
.header--scrolled .nav__link {
    color: var(--color-text);
}

.header--scrolled .nav__toggle span {
    background-color: var(--color-text);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-weight: 700;
    font-size: var(--font-size-xl);
    color: var(--color-white);
    transition: color var(--transition-base);
}

.logo__icon {
    font-size: 1.5rem;
}

.logo__accent {
    color: var(--color-primary);
}

.nav__menu {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.nav__link {
    color: var(--color-white);
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: width var(--transition-base);
}

.nav__link:hover::after {
    width: 100%;
}

.nav__phone {
    color: var(--color-primary);
    font-weight: 600;
    font-size: var(--font-size-base);
    padding: var(--space-2) var(--space-4);
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-base);
    transition: all var(--transition-base);
}

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

.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-2);
    background: none;
    border: none;
    cursor: pointer;
}

.nav__toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-white);
    transition: all var(--transition-base);
}

/* ========================================
   Hero Section
   ======================================== */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--space-20) 0;
    background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-secondary-light) 100%);
    overflow: hidden;
}

.hero__bg {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse at 20% 50%, rgba(245, 158, 11, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(245, 158, 11, 0.1) 0%, transparent 40%),
        radial-gradient(ellipse at 40% 80%, rgba(245, 158, 11, 0.08) 0%, transparent 50%);
}

.hero__content {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.hero__title {
    margin-bottom: var(--space-6);
}

.hero__title-line {
    display: block;
    font-size: var(--font-size-5xl);
    font-weight: 700;
    line-height: 1.1;
    color: var(--color-white);
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s ease forwards;
}

.hero__title-line:nth-child(2) {
    animation-delay: 0.2s;
}

.hero__subtitle {
    font-size: var(--font-size-xl);
    color: var(--color-text-muted);
    margin-bottom: var(--space-8);
    max-width: 600px;
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.4s forwards;
}

.hero__buttons {
    display: flex;
    gap: var(--space-4);
    margin-bottom: var(--space-12);
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.6s forwards;
}

.hero__stats {
    display: flex;
    gap: var(--space-12);
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.8s forwards;
}

.hero__stat {
    display: flex;
    flex-direction: column;
}

.hero__stat-number {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-primary);
}

.hero__stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.hero__scroll {
    position: absolute;
    bottom: var(--space-8);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    color: var(--color-text-muted);
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    animation: bounce 2s infinite;
}

.hero__scroll-arrow {
    font-size: var(--font-size-lg);
}

/* ========================================
   Section Header
   ======================================== */

.section-header {
    text-align: center;
    margin-bottom: var(--space-16);
}

.section-header__subtitle {
    display: inline-block;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-3);
}

.section-header__title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--color-text);
}

/* ========================================
   Services Section
   ======================================== */

.services {
    padding: var(--space-24) 0;
    background-color: var(--color-background);
}

.services__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
}

.service-card {
    padding: var(--space-8);
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.service-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-xl);
    transform: translateY(-4px);
}

.service-card__icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-background-alt);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-6);
    color: var(--color-primary);
}

.service-card__icon svg {
    width: 28px;
    height: 28px;
}

.service-card__title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--space-3);
    color: var(--color-text);
}

.service-card__description {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    margin-bottom: var(--space-4);
    line-height: 1.6;
}

.service-card__list {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

.service-card__list li {
    position: relative;
    padding-left: var(--space-5);
    margin-bottom: var(--space-2);
}

.service-card__list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-primary);
}

/* ========================================
   Advantages Section
   ======================================== */

.advantages {
    padding: var(--space-24) 0;
    background-color: var(--color-background-alt);
}

.advantages__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-8);
}

.advantage-item {
    padding: var(--space-8);
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.advantage-item:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.advantage-item__number {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--color-primary);
    opacity: 0.3;
    margin-bottom: var(--space-4);
}

.advantage-item__title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--space-3);
    color: var(--color-text);
}

.advantage-item__text {
    font-size: var(--font-size-base);
    color: var(--color-text-light);
    line-height: 1.6;
}

/* ========================================
   CTA Section
   ======================================== */

.cta {
    padding: var(--space-20) 0;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    text-align: center;
}

.cta__title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: var(--space-4);
}

.cta__text {
    font-size: var(--font-size-lg);
    color: rgba(255, 255, 255, 0.9);
    max-width: 600px;
    margin: 0 auto var(--space-8);
}

/* ========================================
   Order Section
   ======================================== */

.order {
    padding: var(--space-24) 0;
    background-color: var(--color-background);
}

.order__wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
    align-items: start;
}

.order-form {
    padding: var(--space-8);
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.order-form__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
}

.form-group {
    margin-bottom: var(--space-5);
}

.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: var(--space-2);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-size: var(--font-size-base);
    color: var(--color-text);
    background-color: var(--color-background);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-base);
    transition: border-color var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

.form-notice {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    text-align: center;
    margin-top: var(--space-4);
}

.order__info {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.order-info-card {
    padding: var(--space-8);
    background-color: var(--color-background-alt);
    border-radius: var(--radius-lg);
}

.order-info-card__title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--space-6);
    color: var(--color-text);
}

.order-info-card__steps {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.order-info-card__steps li {
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
}

.order-info-card__step-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background-color: var(--color-primary);
    color: var(--color-white);
    font-weight: 600;
    font-size: var(--font-size-sm);
    border-radius: var(--radius-full);
    flex-shrink: 0;
}

.order-info-card__step-text {
    font-size: var(--font-size-base);
    color: var(--color-text-light);
    padding-top: var(--space-1);
}

.order-info-card__phone {
    display: block;
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--space-2);
}

.order-info-card__hours {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

/* ========================================
   Contacts Section
   ======================================== */

.contacts {
    padding: var(--space-24) 0;
    background-color: var(--color-background-alt);
}

.contacts__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
}

.contact-card {
    padding: var(--space-8);
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.contact-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.contact-card__icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-background-alt);
    border-radius: var(--radius-full);
    margin: 0 auto var(--space-5);
    color: var(--color-primary);
}

.contact-card__icon svg {
    width: 28px;
    height: 28px;
}

.contact-card__title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--space-2);
    color: var(--color-text);
}

.contact-card__value {
    display: block;
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--color-primary);
    margin-bottom: var(--space-1);
}

.contact-card__note {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

/* ========================================
   Footer
   ======================================== */

.footer {
    padding: var(--space-16) 0 var(--space-8);
    background-color: var(--color-background-dark);
    color: var(--color-white);
}

.footer__grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-12);
    margin-bottom: var(--space-12);
}

.logo--footer {
    color: var(--color-white);
}

.footer__description {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    line-height: 1.7;
    margin-top: var(--space-4);
}

.footer__title {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--space-5);
    color: var(--color-white);
}

.footer__links {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.footer__links a {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

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

.footer__phone {
    display: block;
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--space-2);
}

.footer__hours {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.footer__bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-8);
    border-top: 1px solid var(--color-secondary-light);
}

.footer__copyright,
.footer__region {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* ========================================
   Modal
   ======================================== */

.modal {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.modal--active {
    opacity: 1;
    visibility: visible;
}

.modal__overlay {
    position: absolute;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal__content {
    position: relative;
    max-width: 480px;
    width: 90%;
    padding: var(--space-10);
    background-color: var(--color-white);
    border-radius: var(--radius-xl);
    text-align: center;
    transform: scale(0.9);
    transition: transform var(--transition-base);
}

.modal--active .modal__content {
    transform: scale(1);
}

.modal__close {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    font-size: var(--font-size-2xl);
    color: var(--color-text-light);
    cursor: pointer;
    transition: color var(--transition-fast);
}

.modal__close:hover {
    color: var(--color-text);
}

.modal__icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-success);
    color: var(--color-white);
    font-size: var(--font-size-4xl);
    border-radius: var(--radius-full);
    margin: 0 auto var(--space-6);
}

.modal__title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--space-3);
    color: var(--color-text);
}

.modal__text {
    font-size: var(--font-size-base);
    color: var(--color-text-light);
    margin-bottom: var(--space-6);
    line-height: 1.6;
}

/* ========================================
   Animations
   ======================================== */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

/* Scroll Reveal Animation */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

.reveal--active {
    opacity: 1;
    transform: translateY(0);
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 1200px) {
    :root {
        --font-size-6xl: 3rem;
        --font-size-5xl: 2.5rem;
        --font-size-4xl: 2rem;
    }
    
    .advantages__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 992px) {
    .services__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contacts__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .order__wrapper {
        grid-template-columns: 1fr;
    }
    
    .hero__title-line {
        font-size: var(--font-size-4xl);
    }
}

@media (max-width: 768px) {
    :root {
        --container-padding: 1rem;
        --font-size-5xl: 2rem;
        --font-size-4xl: 1.75rem;
        --font-size-3xl: 1.5rem;
    }
    
    .nav__toggle {
        display: flex;
    }
    
    .nav__menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        flex-direction: column;
        justify-content: center;
        gap: var(--space-6);
        background-color: var(--color-white);
        padding: var(--space-8);
        transition: right var(--transition-base);
        box-shadow: var(--shadow-xl);
    }
    
    .nav__menu--active {
        right: 0;
    }
    
    .nav__link,
    .nav__phone {
        color: var(--color-text);
        font-size: var(--font-size-lg);
    }
    
    .nav__menu--active + .nav__toggle span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav__menu--active + .nav__toggle span:nth-child(2) {
        opacity: 0;
    }
    
    .nav__menu--active + .nav__toggle span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
    
    .hero {
        padding: var(--space-16) 0;
    }
    
    .hero__buttons {
        flex-direction: column;
    }
    
    .hero__stats {
        flex-direction: column;
        gap: var(--space-6);
    }
    
    .hero__scroll {
        display: none;
    }
    
    .services__grid,
    .advantages__grid,
    .contacts__grid {
        grid-template-columns: 1fr;
    }
    
    .service-card,
    .advantage-item,
    .contact-card {
        padding: var(--space-6);
    }
    
    .order-form__grid {
        grid-template-columns: 1fr;
    }
    
    .footer__grid {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }
    
    .footer__bottom {
        flex-direction: column;
        gap: var(--space-2);
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero__title-line {
        font-size: var(--font-size-3xl);
    }
    
    .section-header__title {
        font-size: var(--font-size-2xl);
    }
    
    .cta__title {
        font-size: var(--font-size-2xl);
    }
    
    .modal__content {
        padding: var(--space-6);
    }
}