/* ==== ГЛОБАЛЬНЫЕ ПЕРЕМЕННЫЕ ==== */
:root {
    --primary: #333;
    --secondary: #555;
    --accent: #7b2dff;
    --accent-hover: #6a14ff;
    --light-bg: #f9f4ff;
    --white: #fff;
    --text-light: #fff;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s ease;
    --radius: 12px;
    --text: #333;
    --bg-secondary: #f8f9fa;
}

/* ==== ОБЩИЕ СТИЛИ ==== */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    scroll-behavior: smooth;
    line-height: 1.7;
    color: var(--primary);
    background: var(--white);
}

/* ==== ШАПКА ==== */
header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    color: var(--primary);
    backdrop-filter: blur(10px);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 25px 20px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 99;
    transition: padding 0.3s, box-shadow 0.3s;
    height: 90px;
}

header.scrolled {
    padding: 15px 20px;
    height: 60px;
}

header .logo {
    display: flex;
    align-items: center;
    font-size: 1.6rem;
    font-weight: 700;
    text-decoration: none;
    color: var(--primary);
    transition: font-size 0.3s ease;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
    padding-bottom: 23px;
}

header .logo a {
    font-size: 4rem;
    display: flex;
    align-items: center;
    margin: 0;
    padding: 0;
}

header.scrolled .logo {
    padding-bottom: 15px;
}

header.scrolled .logo a {
    font-size: 3rem;
}

header nav a {
    font-size: 1.8rem;
}

header.scrolled nav a {
    font-size: 1.5rem;
}

header nav {
    margin-left: auto;
    display: flex;
    gap: 12px;
    margin-right: 20px;
}

header a {
    color: var(--primary);
    text-decoration: none;
    padding: 8px 14px;
    border-radius: 8px;
    font-size: 1.5rem;
    font-weight: 500;
    transition: 0.3s;
    position: relative;
}

header a.active {
    background-color: var(--accent);
    color: var(--text-light);
    padding-left: 15px;
}

header a:hover {
    color: var(--accent);
}

/* ==== БУРГЕР-МЕНЮ ==== */
.burger {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 21px;
    cursor: pointer;
    position: absolute;
    right: 100px;
    top: 46%;
    transform: translateY(-50%);
}

.burger span {
    display: block;
    height: 3px;
    width: 100%;
    background: var(--primary);
    border-radius: 3px;
    transition: all 0.3s ease;
}

.burger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 6px);
}

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

.burger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -6px);
}

.mobile-menu {
    position: fixed;
    top: 0;
    right: -300px;
    width: 280px;
    height: 100vh;
    background: var(--white);
    box-shadow: -10px 0 20px rgba(0, 0, 0, 0.1);
    z-index: 101;
    padding: 80px 20px 20px;
    transition: right 0.4s ease;
    overflow-y: auto;
}

.mobile-menu.active {
    right: 0;
}

.menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 10px;
    border-bottom: 1px solid #eee;
}

.menu-header h3 {
    font-size: 1.5rem;
    margin: 0;
    color: var(--primary);
}

.close-btn {
    font-size: 2.5rem;
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: #f5f5f5;
    color: var(--primary);
    transition: background 0.3s;
    margin-right: 50px;
}

.close-btn:hover {
    background: #eee;
}

.mobile-menu a {
    display: block;
    color: var(--primary);
    font-size: 1.4rem;
    text-decoration: none;
    padding: 12px 0;
    border-bottom: 1px solid #f0f0f0;
    transition: padding-left 0.3s, background 0.3s;
}

.mobile-menu a:hover {
    padding-left: 10px;
    background: #f9f4ff;
}

.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    z-index: 100;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s ease;
}

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

@media (max-width: 1350px) {
    .burger {
        display: flex;
    }

    header nav {
        display: none;
    }
}

/* ==== ОСНОВНОЕ СОДЕРЖИМОЕ ==== */
main {
    margin-top: 0;
}

section {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 10px 0;
    scroll-margin-top: 100px;
}

section:nth-child(odd) {
    background: linear-gradient(135deg, #f8f4ff, #eef1ff);
}

section:nth-child(even) {
    background: var(--white);
}

.content-block {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    box-sizing: border-box;
}

.content-block-inner {
    width: 80%;
    margin: 0 auto;
    text-align: left;
    font-size: 1.25rem;
}

/* ==== АНИМАЦИЯ ==== */
.fade-in {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 1s ease, transform 1s ease;
}

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

/* ==== ГЕРОЙ-СЕКЦИЯ ==== */
#hero {
    position: relative;
    padding: 180px 0 40px;
    text-align: center;
    overflow: hidden;
}

#hero picture {
    display: block;
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;
}

#hero img {
    width: 100%;
    height: auto;
    max-height: 600px;
    object-fit: contain;
    display: block;
    border-radius: 16px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

#hero-overlay {
    position: absolute;
    top: 60%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--primary);
    font-size: 3.5rem;
    font-weight: 700;
    text-shadow: 0 2px 10px rgba(255, 255, 255, 0.8);
    padding: 15px 30px;
    border-radius: 20px;
}

.img-loader {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 50px;
    height: 50px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    z-index: 5;
}

@keyframes spin {
    0% {
        transform: translate(-50%, -50%) rotate(0deg);
    }

    100% {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

/* ==== ГАЛЕРЕЯ ==== */
.filter-buttons {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;

}

.filter-buttons button {
    background: none;
    color: var(--primary);
    border: 2px solid var(--accent);
    padding: 10px 24px;
    font-size: 1.5rem;
    cursor: pointer;
    border-radius: 30px;
    transition: all 0.3s ease;
    font-weight: 500;
    position: relative;
    overflow: hidden;
}

.filter-buttons button::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(123, 45, 255, 0.1), transparent);
    transition: left 0.5s;
}

.filter-buttons button:hover::after {
    left: 100%;
}

.filter-buttons button.active {
    background: linear-gradient(135deg, var(--accent), var(--accent-hover));
    color: var(--text-light);
    box-shadow: 0 6px 16px rgba(123, 45, 255, 0.3);
}

.filter-buttons button:hover,
.filter-buttons button:focus {
    transform: translateY(-2px);
}

.programs {
    display: flex;
    flex-wrap: wrap;
    gap: 25px;
    justify-content: center;
    margin-top: 30px;
}

.programs-item {
    flex: 1 1 calc(15% - 30px);
    background: var(--white);
    padding: 18px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
    border-radius: var(--radius);
    transition: transform 0.3s, box-shadow 0.3s;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.programs-item img {
    width: 100px;
    height: 100px;
    object-fit: cover;
    border-radius: 12px;
    transition: transform 0.3s ease, opacity 0.3s ease;
    opacity: 1;
}

.programs-item .item-text {
    font-size: 1.25rem;
    font-weight: normal;
    color: var(--primary);
}

.programs-item.hidden {
    display: none;
}

.programs-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.15);
}

/* ==== АККОРДЕОН УСЛУГ ==== */
.tree-list ul {
    list-style: none;
    padding-left: 10px;
}

.tree-list label {
    display: block;
    font-weight: 600;
    color: var(--primary);
    background: #f1e6ff;
    padding: 12px 16px;
    margin-bottom: 6px;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.3s ease, transform 0.2s ease;
    border: 1px solid #e0d0ff;
}

.tree-list label:hover {
    background: #e6d6ff;
}

.tree-list label::after {
    content: " ➕";
    float: right;
}

.tree-list label.active::after {
    content: " ➖";
}

.tree-list .service-content {
    background: #fcf9ff;
    margin: 6px 0 15px;
    padding: 12px 16px;
    border-radius: 8px;
    border-left: 4px solid var(--accent);
    transition: max-height 0.4s ease, opacity 0.3s ease;
    overflow: hidden;
    opacity: 1;
}

.tree-list .service-content.hidden {
    max-height: 0;
    opacity: 0;
    padding: 0 16px;
    margin: 0;
    border: none;
}

.tree-list .service-content li {
    margin: 6px 0;
    font-size: 1.25rem;
    color: var(--secondary);
}

/* ==== КНОПКА "НАВЕРХ" ==== */
.scroll-to-top {
    position: fixed;
    bottom: 100px;
    right: 20px;
    background: var(--accent);
    color: var(--text-light);
    padding: 14px 20px;
    border: none;
    cursor: pointer;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    z-index: 9999 !important;
    opacity: 0;
    visibility: hidden;
    border-radius: 12px;
    box-shadow: 0 6px 20px rgba(123, 45, 255, 0.4);
    font-weight: 600;
    pointer-events: auto !important;
}

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

.scroll-to-top:hover {
    background: var(--accent-hover);
    transform: translateY(-3px) scale(1.03);
    box-shadow: 0 8px 25px rgba(123, 45, 255, 0.5);
}

/* ==== ФУТЕР ==== */
footer {
    text-align: center;
    padding: 30px 0;
    background: var(--primary);
    color: var(--text-light);
    font-size: 0.95rem;
    font-weight: 500;
}

/* ==== АДАПТИВ ==== */
@media (max-width: 700px) {
    header .logo a {
        font-size: 2.5rem;
    }

    header.scrolled .logo a {
        font-size: 2rem;
    }

    #hero-overlay {
        font-size: 1.5rem;
        padding: 12px 20px;
    }

    .filter-buttons button {
        padding: 9px 20px;
        font-size: 1rem;
    }

    .programs-item img {
        width: 75px;
        height: 75px;
    }

    .programs-item .item-text {
        font-size: 0.9rem;
    }

    .content-block-inner {
        font-size: 1rem;
    }

    .tree-list .service-content li {
        font-size: 0.9rem;
    }
}

/* ==== ДОСТУПНОСТЬ ==== */
a:focus,
button:focus {
    outline: 3px solid var(--accent);
    outline-offset: 3px;
}

@media print {

    header,
    .scroll-to-top,
    .filter-buttons {
        display: none;
    }

    .tree-list .service-content {
        display: block;
        max-height: none;
    }

    .tree-list label::after {
        content: none;
    }
}

/* ==== ВЫДЕЛЕНИЕ ТЕКСТА ==== */
::-moz-selection {
    background-color: #7b2dff;
    color: white;
}

::selection {
    background-color: #7b2dff;
    color: white;
}

/* ==== ПОДСКАЗКА ПОД ТАБЛИЦЕЙ ==== */
.hint-box {
    margin: 20px 0 0;
    padding: 16px;
    background: #f9f9f9;
    border-left: 3px solid #7b2dff;
    border-radius: 6px;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-size: 0.9rem;
    color: #555;
    line-height: 1.55;
}

/* ==== ЕДИНЫЙ РАЗМЕР ШРИФТА ДЛЯ ПОДСКАЗКИ ==== */
.hint-box p,
.hint-box span,
.hint-box li {
    font-size: 0.95rem !important;
    line-height: 1.6;
    color: #555;
}

.hint-sm {
    font-size: 0.95rem;
    line-height: 1.6;
    color: #555;
}

.hint-box p {
    margin: 8px 0;
}


.hint-box p:last-child {
    margin: 0;
}

.hint-box code {
    font-family: 'Segoe UI Mono', Consolas, 'Courier New', monospace;
    background: #f0e6ff;
    /* Лёгкий фиолетовый фон вместо серого */
    padding: 2px 5px;
    border-radius: 4px;
    font-size: 0.95em;
    color: #333;
    font-weight: 500;
    border: 1px solid #e0d0ff;
    /* Лёгкая рамка для чёткости */
    box-shadow: 0 1px 3px rgba(123, 45, 255, 0.1);
}


.hint-box .code-sep {
    margin: 0 2px;
    color: #d62828;
}

.code-pre {
    white-space: pre;
    background: #f0f0f0;
    padding: 4px 8px;
    border-radius: 4px;
    display: inline-block;
    font-size: 0.9em;
}