/* ========================================
   DESIGN SYSTEM — Custom Properties
   ======================================== */
:root {
    --color-primary: #8B7355;
    --color-primary-light: #C4A97D;
    --color-primary-dark: #6B5740;
    --color-accent: #4A6741;
    --color-bg: #FAF8F5;
    --color-bg-alt: #F0EBE3;
    --color-text: #2C2C2C;
    --color-text-light: #6B6B6B;
    --color-white: #FFFFFF;
    --color-dark: #1a1a1a;
    --radius: 12px;
    --radius-sm: 8px;
    --radius-pill: 50px;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 8px 32px rgba(0, 0, 0, 0.12);
    --transition: 0.3s ease;
    --max-width: 1200px;
    --section-padding: 100px 0;
    --section-padding-mobile: 60px 0;
    --font-stack: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
}

/* ========================================
   RESET & BASE
   ======================================== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-stack);
    font-weight: 400;
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

ul {
    list-style: none;
}

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}

/* ========================================
   LANGUAGE SWITCHER — Hide non-active
   ======================================== */
html[data-lang="ru"] [lang="fr"],
html[data-lang="ru"] [lang="en"] { display: none; }
html[data-lang="fr"] [lang="ru"],
html[data-lang="fr"] [lang="en"] { display: none; }
html[data-lang="en"] [lang="ru"],
html[data-lang="en"] [lang="fr"] { display: none; }

/* ========================================
   UTILITY
   ======================================== */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: var(--section-padding);
}

.section__title {
    font-size: 2.5rem;
    font-weight: 300;
    text-align: center;
    margin-bottom: 16px;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

.section__title--left {
    text-align: left;
}

.section__title--light {
    color: var(--color-white);
}

.section__subtitle {
    font-size: 1.125rem;
    color: var(--color-text-light);
    text-align: center;
    margin-bottom: 60px;
    font-weight: 400;
}

.divider {
    border: none;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-primary-light), transparent);
    max-width: 600px;
    margin: 0 auto;
}

/* ========================================
   BUTTONS
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 16px 36px;
    border-radius: var(--radius-pill);
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    transition: all var(--transition);
    cursor: pointer;
    border: none;
    text-align: center;
}

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

.btn--primary:hover {
    background-color: var(--color-primary-dark);
    transform: scale(1.02);
    box-shadow: var(--shadow-hover);
}

.btn--whatsapp {
    background-color: #25D366;
    color: var(--color-white);
}

.btn--whatsapp:hover {
    background-color: #1da851;
    transform: scale(1.02);
    box-shadow: var(--shadow-hover);
}

.btn--small {
    padding: 10px 24px;
    font-size: 0.8rem;
    background-color: var(--color-primary);
    color: var(--color-white);
}

.btn--small:hover {
    background-color: var(--color-primary-dark);
    transform: scale(1.02);
}

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

.btn__icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

/* ========================================
   HEADER
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(250, 248, 245, 0.85);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: box-shadow var(--transition);
}

.header--scrolled {
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.header__logo {
    font-size: 1.125rem;
    font-weight: 300;
    letter-spacing: 0.02em;
    color: var(--color-text);
    white-space: nowrap;
}

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

.header__nav {
    display: none;
}

.header__nav-list {
    display: flex;
    gap: 32px;
}

.header__nav-link {
    font-size: 0.875rem;
    font-weight: 400;
    color: var(--color-text-light);
    letter-spacing: 0.02em;
    position: relative;
}

.header__nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--color-primary);
    transition: width var(--transition);
}

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

.header__nav-link:hover::after {
    width: 100%;
}

/* Language Switcher */
.header__lang {
    display: flex;
    gap: 4px;
    background: var(--color-bg-alt);
    border-radius: var(--radius-pill);
    padding: 3px;
}

.lang-btn {
    padding: 6px 14px;
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    border-radius: var(--radius-pill);
    color: var(--color-text-light);
    transition: all var(--transition);
}

.lang-btn.active {
    background-color: var(--color-white);
    color: var(--color-primary);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.1);
}

.lang-btn:hover:not(.active) {
    color: var(--color-text);
}

/* Burger */
.header__burger {
    display: flex;
    flex-direction: column;
    gap: 5px;
    width: 28px;
    padding: 4px 0;
    z-index: 1001;
}

.header__burger span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-text);
    border-radius: 2px;
    transition: all var(--transition);
}

.header__burger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.header__burger.active span:nth-child(2) {
    opacity: 0;
}

.header__burger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ========================================
   MOBILE MENU
   ======================================== */
.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 999;
    background: rgba(250, 248, 245, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s ease;
}

.mobile-menu.active {
    opacity: 1;
    visibility: visible;
}

.mobile-menu__nav {
    text-align: center;
}

.mobile-menu__list {
    margin-bottom: 40px;
}

.mobile-menu__list li {
    margin-bottom: 24px;
}

.mobile-menu__link {
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--color-text);
    transition: color var(--transition);
}

.mobile-menu__link:hover {
    color: var(--color-primary);
}

.mobile-menu__lang {
    display: flex;
    gap: 4px;
    justify-content: center;
    background: var(--color-bg-alt);
    border-radius: var(--radius-pill);
    padding: 3px;
    display: inline-flex;
}

/* ========================================
   HERO
   ======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: linear-gradient(135deg, #8B7355, #C4A97D);
}

.hero__bg {
    position: absolute;
    inset: 0;
    z-index: 1;
}

.hero__bg-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        180deg,
        rgba(26, 26, 26, 0.4) 0%,
        rgba(26, 26, 26, 0.6) 100%
    );
}

.hero__content {
    position: relative;
    z-index: 2;
    padding: 120px 24px 60px;
    max-width: 800px;
}

.hero__title {
    font-size: 2.5rem;
    font-weight: 300;
    color: var(--color-white);
    line-height: 1.2;
    margin-bottom: 20px;
    letter-spacing: -0.02em;
}

.hero__subtitle {
    font-size: 1.125rem;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.7;
    margin-bottom: 40px;
}

.hero__buttons {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

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

.animate-fade-in {
    animation: fadeInUp 0.8s ease forwards;
}

.animate-fade-in--delay {
    animation-delay: 0.3s;
    opacity: 0;
}

.animate-fade-in--delay2 {
    animation-delay: 0.6s;
    opacity: 0;
}

/* Scroll-triggered fade-in */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ========================================
   ABOUT
   ======================================== */
.about__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
    align-items: center;
}

.about__photo-wrap {
    display: flex;
    justify-content: center;
}

.about__photo {
    width: 100%;
    max-width: 400px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    object-fit: cover;
    aspect-ratio: 3 / 4;
}

.about__text {
    max-width: 600px;
}

.about__bio {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--color-text);
    margin-bottom: 40px;
}

.about__badges {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.badge {
    text-align: center;
    padding: 20px 12px;
    background: var(--color-bg-alt);
    border-radius: var(--radius);
}

.badge__icon {
    font-size: 2rem;
    margin-bottom: 8px;
}

.badge__text {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text);
}

/* ========================================
   SERVICES
   ======================================== */
.services__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

.service-card {
    background: var(--color-white);
    border-radius: var(--radius);
    padding: 32px 24px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: transform var(--transition), box-shadow var(--transition);
}

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

.service-card__icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.service-card__title {
    font-size: 1.125rem;
    font-weight: 500;
    margin-bottom: 12px;
    color: var(--color-text);
}

.service-card__desc {
    font-size: 0.9rem;
    color: var(--color-text-light);
    line-height: 1.6;
    margin-bottom: 16px;
}

.service-card__price {
    font-size: 0.8rem;
    color: var(--color-primary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 20px;
}

/* ========================================
   DIPLOMAS
   ======================================== */
.diplomas__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-bottom: 40px;
}

.diplomas__item {
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition);
    background: var(--color-bg-alt);
}

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

.diplomas__item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    aspect-ratio: 3 / 4;
}

.diplomas__text {
    font-size: 1rem;
    color: var(--color-text-light);
    text-align: center;
    line-height: 1.7;
    max-width: 700px;
    margin: 0 auto;
}

/* ========================================
   LIGHTBOX
   ======================================== */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: 2000;
    background: rgba(0, 0, 0, 0.92);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    cursor: pointer;
    padding: 24px;
}

.lightbox.active {
    opacity: 1;
    visibility: visible;
}

.lightbox__close {
    position: absolute;
    top: 20px;
    right: 24px;
    font-size: 2.5rem;
    color: var(--color-white);
    cursor: pointer;
    z-index: 2001;
    line-height: 1;
    transition: opacity var(--transition);
}

.lightbox__close:hover {
    opacity: 0.7;
}

.lightbox__img {
    max-width: 90vw;
    max-height: 90vh;
    object-fit: contain;
    border-radius: var(--radius-sm);
    cursor: default;
}

/* ========================================
   HOW IT WORKS (STEPS)
   ======================================== */
.steps {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
    max-width: 800px;
    margin: 60px auto 0;
}

.step {
    text-align: center;
}

.step__number {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--color-primary);
    color: var(--color-white);
    font-size: 1.25rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
}

.step__title {
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--color-text);
}

.step__text {
    font-size: 0.95rem;
    color: var(--color-text-light);
    line-height: 1.6;
}

/* ========================================
   SERVICE AREA
   ======================================== */
.area {
    position: relative;
    padding: 100px 0;
    overflow: hidden;
    background: linear-gradient(135deg, #8B7355, #C4A97D);
}

.area__bg {
    position: absolute;
    inset: 0;
    z-index: 1;
}

.area__bg-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.area__overlay {
    position: absolute;
    inset: 0;
    background: rgba(26, 26, 26, 0.65);
}

.area__content {
    position: relative;
    z-index: 2;
    text-align: center;
}

.area__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
    margin: 40px 0 32px;
}

.area__tag {
    padding: 10px 24px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-pill);
    color: var(--color-white);
    font-size: 0.9rem;
    font-weight: 400;
    letter-spacing: 0.02em;
    transition: all var(--transition);
}

.area__tag:hover {
    background: rgba(255, 255, 255, 0.25);
}

.area__text {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.85);
    font-weight: 400;
}

/* ========================================
   CONTACT
   ======================================== */
.contact__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 48px;
    margin-top: 60px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text);
}

.form-input {
    width: 100%;
    min-height: 48px;
    padding: 12px 16px;
    border: 1px solid #ddd;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-family: var(--font-stack);
    color: var(--color-text);
    background: var(--color-white);
    transition: border-color var(--transition), box-shadow var(--transition);
    outline: none;
}

.form-input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(139, 115, 85, 0.15);
}

.form-input.error {
    border-color: #e74c3c;
}

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

.form-status {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    display: none;
    text-align: center;
}

.form-status--success {
    display: block;
    background: #e8f5e9;
    color: #2e7d32;
}

.form-status--error {
    display: block;
    background: #fce4ec;
    color: #c62828;
}

/* Contact Info */
.contact__info {
    padding: 32px;
    background: var(--color-bg-alt);
    border-radius: var(--radius);
}

.contact__info-title {
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: 24px;
    color: var(--color-text);
}

.contact__list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 32px;
}

.contact__link {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1rem;
    color: var(--color-text);
    transition: color var(--transition);
    padding: 8px 0;
}

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

.contact__icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
    color: var(--color-primary);
}

.contact__address {
    padding-top: 16px;
    border-top: 1px solid rgba(0, 0, 0, 0.08);
}

.contact__address-title {
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-primary);
    margin-bottom: 8px;
}

.contact__mode {
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid rgba(0, 0, 0, 0.08);
    font-style: italic;
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
    background: var(--color-dark);
    color: rgba(255, 255, 255, 0.7);
    padding: 48px 0;
}

.footer__inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    text-align: center;
}

.footer__copy {
    font-size: 0.85rem;
}

.footer__social {
    display: flex;
    gap: 16px;
}

.footer__social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
    transition: all var(--transition);
}

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

.footer__nav {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    justify-content: center;
}

.footer__nav a {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
    transition: color var(--transition);
}

.footer__nav a:hover {
    color: var(--color-white);
}

/* ========================================
   RESPONSIVE — TABLET (768px)
   ======================================== */
@media (min-width: 768px) {
    .section__title {
        font-size: 3rem;
    }

    .hero__title {
        font-size: 3.5rem;
    }

    .hero__buttons {
        flex-direction: row;
    }

    .about__grid {
        grid-template-columns: 1fr 1fr;
        gap: 60px;
    }

    .services__grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .diplomas__grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .steps {
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
    }

    .contact__grid {
        grid-template-columns: 1fr 1fr;
        gap: 48px;
    }
}

/* ========================================
   RESPONSIVE — DESKTOP (1200px)
   ======================================== */
@media (min-width: 1200px) {
    .header__nav {
        display: block;
    }

    .header__burger {
        display: none;
    }

    .hero__content {
        padding: 0 24px;
    }

    .hero__title {
        font-size: 4rem;
    }

    .services__grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .about__grid {
        gap: 80px;
    }

    .steps {
        gap: 48px;
    }
}

/* ========================================
   BODY SCROLL LOCK (mobile menu open)
   ======================================== */
body.menu-open {
    overflow: hidden;
}