/* ===================================
   BAK-DECOR.CSS — декоративные паттерны и "карандашные" дудлы
   Надстройка над bak.css / services.css, ничего не переопределяет,
   только добавляет фоновые декорации (::before/::after, background)
   =================================== */

:root {
    --doodle-star: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='40' height='40' viewBox='0 0 40 40'%3E%3Cpath d='M20 3 L23 16 L35 9 L24 19 L37 23 L23 22 L27 36 L20 23 L13 36 L17 22 L3 23 L16 19 L5 9 L17 16 Z' fill='none' stroke='%23EE7A5D' stroke-width='1.4' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    --doodle-circle: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='60' viewBox='0 0 60 60'%3E%3Cpath d='M14 32C11 18 24 7 39 9C54 11 55 29 45 40C35 51 16 48 11 35' fill='none' stroke='%2325A9B8' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E");
    --doodle-wave: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='24' viewBox='0 0 120 24'%3E%3Cpath d='M2 14Q12 2 22 14T42 14T62 14T82 14T102 14T122 14' fill='none' stroke='%2352CC9A' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E");
    --doodle-zigzag: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='20' viewBox='0 0 60 20'%3E%3Cpath d='M2 17L12 4L22 17L32 4L42 17L52 4' fill='none' stroke='%23EE7A5D' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    --doodle-dots: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='40' height='16' viewBox='0 0 40 16'%3E%3Ccircle cx='4' cy='8' r='2' fill='%2352CC9A'/%3E%3Ccircle cx='16' cy='6' r='2' fill='%2352CC9A'/%3E%3Ccircle cx='28' cy='9' r='2' fill='%2352CC9A'/%3E%3Ccircle cx='36' cy='5' r='2' fill='%2352CC9A'/%3E%3C/svg%3E");
    --doodle-cloud: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='90' height='60' viewBox='0 0 90 60'%3E%3Cpath d='M20 45C8 45 4 33 14 29C10 16 26 8 36 15C42 6 60 8 62 20C76 18 82 34 70 40C74 50 60 54 52 47C46 53 28 53 24 46Z' fill='none' stroke='%2325A9B8' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    --doodle-heart: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='30' height='26' viewBox='0 0 30 26'%3E%3Cpath d='M15 23C15 23 2 14 2 7C2 2 8 0 12 4C13.5 5.5 15 8 15 8C15 8 16.5 5.5 18 4C22 0 28 2 28 7C28 14 15 23 15 23Z' fill='none' stroke='%23EE7A5D' stroke-width='1.6' stroke-linejoin='round'/%3E%3C/svg%3E");
    --doodle-note: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='34' height='40' viewBox='0 0 34 40'%3E%3Cpath d='M22 4v22a5 5 0 11-3-4.6V10l-8 2v18a5 5 0 11-3-4.6V8l14-4Z' fill='none' stroke='%23EE7A5D' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    --doodle-underline: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='90' height='14' viewBox='0 0 90 14'%3E%3Cpath d='M2 9C12 2 18 12 28 6C38 0 44 12 54 6C64 0 72 12 82 6' fill='none' stroke='%23EE7A5D' stroke-width='3' stroke-linecap='round'/%3E%3C/svg%3E");
    --doodle-wave-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1200 40' preserveAspectRatio='none'%3E%3Cpath d='M0 40L0 20C100 0 200 40 300 20C400 0 500 40 600 20C700 0 800 40 900 20C1000 0 1100 40 1200 20L1200 40Z' fill='white'/%3E%3C/svg%3E");

    /* приглушённые "водяные" варианты для карточек */
    --doodle-star-w: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='40' height='40' viewBox='0 0 40 40'%3E%3Cpath d='M20 3 L23 16 L35 9 L24 19 L37 23 L23 22 L27 36 L20 23 L13 36 L17 22 L3 23 L16 19 L5 9 L17 16 Z' fill='none' stroke='rgba(238,122,93,0.22)' stroke-width='1.4' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    --doodle-check-w: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='36' height='30' viewBox='0 0 36 30'%3E%3Cpath d='M4 16L14 25L32 4' fill='none' stroke='rgba(82,204,154,0.35)' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    --doodle-question-w: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='26' height='40' viewBox='0 0 26 40'%3E%3Cpath d='M6 12C6 5 12 2 17 5C22 8 21 15 16 18C13 20 13 22 13 25' stroke='rgba(37,169,184,0.3)' stroke-width='2.6' stroke-linecap='round' fill='none'/%3E%3Ccircle cx='13' cy='33' r='2.4' fill='rgba(37,169,184,0.3)'/%3E%3C/svg%3E");
    --doodle-exclaim-w: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='40' viewBox='0 0 24 40'%3E%3Cpath d='M12 3C10 14 11 20 12 26' stroke='rgba(220,38,38,0.28)' stroke-width='3' stroke-linecap='round' fill='none'/%3E%3Ccircle cx='12' cy='34' r='2.4' fill='rgba(220,38,38,0.28)'/%3E%3C/svg%3E");
    --doodle-dots-w: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='40' height='16' viewBox='0 0 40 16'%3E%3Ccircle cx='4' cy='8' r='2' fill='rgba(82,204,154,0.3)'/%3E%3Ccircle cx='16' cy='6' r='2' fill='rgba(82,204,154,0.3)'/%3E%3Ccircle cx='28' cy='9' r='2' fill='rgba(82,204,154,0.3)'/%3E%3Ccircle cx='36' cy='5' r='2' fill='rgba(82,204,154,0.3)'/%3E%3C/svg%3E");
}

@keyframes bakDoodleFloat {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50%      { transform: translateY(-10px) rotate(6deg); }
}

@keyframes bakDoodleFloatReverse {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50%      { transform: translateY(8px) rotate(-8deg); }
}

/* ===================================
   HERO
   =================================== */
.bak-hero {
    position: relative;
    isolation: isolate;
}

.bak-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background-image: var(--doodle-cloud), var(--doodle-note), var(--doodle-dots);
    background-repeat: no-repeat;
    background-position: 4% 18%, 90% 68%, 88% 14%;
    background-size: 110px 74px, 34px 40px, 60px 24px;
    opacity: .45;
}

.bak-hero::after {
    content: '';
    position: absolute;
    z-index: 0;
    pointer-events: none;
    top: 10%;
    right: 8%;
    width: 48px;
    height: 48px;
    background: var(--doodle-star) no-repeat center / contain;
    opacity: .5;
    animation: bakDoodleFloat 8s ease-in-out infinite;
}

.bak-hero .container {
    position: relative;
    z-index: 1;
}

/* стикеры-теги слегка "приклеены" вкривь */
.service-tag:nth-child(odd)  { transform: rotate(-1.5deg); }
.service-tag:nth-child(even) { transform: rotate(1.2deg); }
.service-tag {
    display: inline-flex;
    transition: transform var(--transition-base, .3s), box-shadow var(--transition-base, .3s);
}
.service-tag:hover {
    transform: rotate(0deg) translateY(-2px);
}

/* пунктирная рамка вокруг фото-иллюстрации, как приклеенный полароид */
.service-hero__image {
    outline: 2px dashed rgba(238, 122, 93, .35);
    outline-offset: 8px;
}

/* ===================================
   ВОЛНИСТЫЕ РАЗДЕЛИТЕЛИ ВМЕСТО ПРЯМОЙ ЛИНИИ
   =================================== */
.hero__divider {
    position: relative;
    overflow: hidden;
}

.hero__divider::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: -1px;
    height: 200%;
    background: currentColor;
    -webkit-mask-image: var(--doodle-wave-mask);
    mask-image: var(--doodle-wave-mask);
    -webkit-mask-size: 100% 100%;
    mask-size: 100% 100%;
    -webkit-mask-repeat: no-repeat;
    mask-repeat: no-repeat;
    opacity: .06;
    pointer-events: none;
}

/* ===================================
   БЛОК "СУТЬ МЕТОДА"
   =================================== */
.bak-about {
    position: relative;
    isolation: isolate;
}

.bak-about::before {
    content: '';
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background-image: radial-gradient(circle, rgba(37, 169, 184, .12) 1.4px, transparent 1.6px);
    background-size: 26px 26px;
    opacity: .6;
}

.bak-about > .container {
    position: relative;
    z-index: 1;
}

.section-title {
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 90px;
    height: 12px;
    margin-top: 10px;
    background: var(--doodle-underline) no-repeat left center / contain;
}

/* водяной знак ноты на карточке "как это работает" */
.principle-box {
    position: relative;
    overflow: hidden;
    isolation: isolate;
}

.principle-box::after {
    content: '';
    position: absolute;
    right: 4%;
    bottom: 6%;
    width: 40px;
    height: 46px;
    background: var(--doodle-note) no-repeat center / contain;
    opacity: .12;
    pointer-events: none;
    z-index: 0;
}

/* лёгкий "стикер"-декор на карточках преимуществ */
.feature-card {
    position: relative;
    overflow: hidden;
    isolation: isolate;
}

.feature-card::after {
    content: '';
    position: absolute;
    top: 8px;
    right: 8px;
    width: 22px;
    height: 22px;
    background: var(--doodle-star) no-repeat center / contain;
    opacity: .25;
    pointer-events: none;
    transition: transform .4s cubic-bezier(.16,1,.3,1);
}

.feature-card:hover::after {
    transform: rotate(20deg) scale(1.15);
}

/* ===================================
   ДИАГРАММА ОБРАТНОЙ СВЯЗИ (bak-loop)
   =================================== */
.bak-loop {
    position: relative;
    isolation: isolate;
}

.bak-loop::before {
    content: '';
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background-image: repeating-linear-gradient(to bottom, transparent 0 31px, rgba(37, 169, 184, .1) 31px 32px);
    opacity: .5;
}

.bak-loop__title,
.bak-loop__subtitle,
.bak-loop__diagram,
.bak-loop__return {
    position: relative;
    z-index: 1;
}

/* "шатающееся" пунктирное колечко за иконкой узла */
.bak-loop__node-icon {
    position: relative;
}

.bak-loop__node-icon::after {
    content: '';
    position: absolute;
    inset: -8px;
    border: 2px dashed rgba(238, 122, 93, .35);
    border-radius: 42% 58% 53% 47% / 48% 44% 56% 52%;
    z-index: -1;
    pointer-events: none;
}

.bak-loop__node:nth-child(4n+1) .bak-loop__node-icon::after { transform: rotate(4deg); }
.bak-loop__node:nth-child(4n+3) .bak-loop__node-icon::after { transform: rotate(-6deg); }

/* стрелки — от руки: чуть дрожащий пунктир вместо гладкой линии */
.bak-loop__arrow path {
    stroke-dasharray: 4 3;
}

.bak-note {
    position: relative;
    overflow: hidden;
}

.bak-note::after {
    content: '';
    position: absolute;
    right: 4%;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 34px;
    background: var(--doodle-exclaim-w) no-repeat center / contain;
    pointer-events: none;
}

/* ===================================
   ПОКАЗАНИЯ
   =================================== */
.service-indications {
    position: relative;
    isolation: isolate;
}

.service-indications::before {
    content: '';
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background-image:
            radial-gradient(circle, rgba(238, 122, 93, .08) 1.4px, transparent 1.6px);
    background-size: 30px 30px;
    opacity: .7;
}

.service-indications > .container {
    position: relative;
    z-index: 1;
}

.indication-item {
    position: relative;
}

.indication-item__number {
    position: relative;
}

.indication-item__number::after {
    content: '';
    position: absolute;
    inset: -6px;
    border: 2px dashed rgba(37, 169, 184, .35);
    border-radius: 44% 56% 50% 50% / 52% 48% 52% 48%;
    z-index: -1;
    pointer-events: none;
}

/* визуальная панель с наушниками — украшаем плавающими дудлами */
.bak-visual-panel {
    position: relative;
    overflow: hidden;
    isolation: isolate;
}

.bak-visual-panel::before {
    content: '';
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background-image: var(--doodle-circle), var(--doodle-cloud);
    background-repeat: no-repeat;
    background-position: 88% 78%, 8% 12%;
    background-size: 54px 54px, 76px 50px;
    opacity: .3;
}

.bak-visual-panel::after {
    content: '';
    position: absolute;
    z-index: 0;
    pointer-events: none;
    top: 6%;
    right: 10%;
    width: 30px;
    height: 30px;
    background: var(--doodle-star) no-repeat center / contain;
    opacity: .45;
    animation: bakDoodleFloatReverse 9s ease-in-out infinite;
}

.bak-visual-panel__headphones,
.bak-visual-panel__eq,
.bak-visual-panel__caption {
    position: relative;
    z-index: 1;
}

/* противопоказания — водяной знак восклицательного знака */
.indications-contraindications {
    position: relative;
    overflow: hidden;
}

.indications-contraindications::after {
    content: '';
    position: absolute;
    right: 5%;
    top: 12%;
    width: 22px;
    height: 36px;
    background: var(--doodle-exclaim-w) no-repeat center / contain;
    pointer-events: none;
}

/* ===================================
   РЕЗУЛЬТАТЫ
   =================================== */
.service-results {
    position: relative;
    isolation: isolate;
}

.service-results::before {
    content: '';
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background-image: radial-gradient(circle, rgba(82, 204, 154, .1) 1.4px, transparent 1.6px);
    background-size: 28px 28px;
    opacity: .6;
}

.service-results > .container {
    position: relative;
    z-index: 1;
}

.result-item {
    position: relative;
    overflow: hidden;
    isolation: isolate;
    transition: transform .35s cubic-bezier(.16,1,.3,1), box-shadow .35s cubic-bezier(.16,1,.3,1);
}

.result-item::after {
    content: '';
    position: absolute;
    right: 6%;
    top: 8%;
    width: 30px;
    height: 26px;
    background: var(--doodle-check-w) no-repeat center / contain;
    pointer-events: none;
    z-index: 0;
    opacity: .9;
}

.result-item:hover {
    transform: translateY(-3px);
}

.results-note {
    position: relative;
    overflow: hidden;
}

.results-note::after {
    content: '';
    position: absolute;
    left: 5%;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 18px;
    background: var(--doodle-wave) no-repeat center / contain;
    opacity: .3;
    pointer-events: none;
}

/* ===================================
   FAQ
   =================================== */
.service-faq {
    position: relative;
    isolation: isolate;
}

.service-faq::before {
    content: '';
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background-image: var(--doodle-question-w), var(--doodle-question-w), var(--doodle-question-w);
    background-repeat: no-repeat;
    background-position: 6% 10%, 92% 40%, 10% 85%;
    background-size: 26px 40px, 22px 34px, 24px 36px;
    opacity: .6;
}

.service-faq > .container {
    position: relative;
    z-index: 1;
}

.faq-item {
    position: relative;
    transition: transform .3s ease;
}

.faq-item[open] {
    transform: translateX(2px);
}

/* ===================================
   CTA
   =================================== */
.doctors-cta {
    position: relative;
    isolation: isolate;
}

.doctors-cta::before {
    content: '';
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background-image: var(--doodle-heart), var(--doodle-wave), var(--doodle-dots);
    background-repeat: no-repeat;
    background-position: 6% 25%, 40% 88%, 88% 30%;
    background-size: 38px 32px, 140px 24px, 50px 20px;
    opacity: .4;
}

.doctors-cta::after {
    content: '';
    position: absolute;
    z-index: 0;
    pointer-events: none;
    top: 15%;
    left: 8%;
    width: 44px;
    height: 44px;
    background: var(--doodle-circle) no-repeat center / contain;
    opacity: .38;
    animation: bakDoodleFloatReverse 9s ease-in-out infinite;
}

.doctors-cta > .container {
    position: relative;
    z-index: 1;
}

/* ===================================
   МОБИЛЬНАЯ АДАПТАЦИЯ ДЕКОРА
   =================================== */
@media (max-width: 768px) {
    .bak-hero::before,
    .doctors-cta::before,
    .service-faq::before,
    .bak-visual-panel::before {
        opacity: .22;
    }

    .bak-hero::after,
    .doctors-cta::after,
    .bak-visual-panel::after {
        width: 32px;
        height: 32px;
    }

    .principle-box::after,
    .indications-contraindications::after {
        opacity: .08;
        transform: scale(.8);
    }
}

/* ===================================
   ACCESSIBILITY / PRINT
   =================================== */
@media (prefers-reduced-motion: reduce) {
    .bak-hero::after,
    .doctors-cta::after,
    .bak-visual-panel::after {
        animation: none;
    }
}

@media print {
    .bak-hero::before,
    .bak-hero::after,
    .doctors-cta::before,
    .doctors-cta::after,
    .bak-about::before,
    .service-indications::before,
    .service-results::before,
    .service-faq::before,
    .bak-visual-panel::before,
    .bak-visual-panel::after,
    .principle-box::after,
    .feature-card::after,
    .result-item::after,
    .indications-contraindications::after,
    .bak-note::after,
    .hero__divider::after {
        display: none !important;
    }
}