/* ============================================================
   ГЛОБАЛЬНЫЕ ПЕРЕМЕННЫЕ — тёмная тема (по умолчанию)
   ============================================================ */
:root {
    --bg: #0f0d0a;
    --bg-card: #1a1714;
    --bg-card-hover: #221f1a;
    --fg: #f0e6d6;
    --fg-muted: #8a7e6e;
    --accent: #d4a24e;
    --accent-glow: rgba(212, 162, 78, .3);
    --accent-dark: #a07830;
    --border: #2e2820;
    --border-light: #3d3529;
    --epoxy: #2dd4bf;
    --epoxy-glow: rgba(45, 212, 191, .25);
    --radius: 14px;
    --radius-sm: 8px;
    --shadow: 0 8px 32px rgba(0, 0, 0, .4);
    --transition: .3s cubic-bezier(.4, 0, .2, 1);
    --select-bg: rgba(255, 255, 255, .03);
    --btn-text: #0f0d0a;
    --result-bg: linear-gradient(135deg, rgba(212, 162, 78, .06) 0%, rgba(45, 212, 191, .03) 100%);
    --result-border: rgba(212, 162, 78, .15);
    --toggle-bg: #2e2820;
    --toggle-knob: var(--accent);
    --badge-bg: rgba(212, 162, 78, .08);
    --badge-border: rgba(212, 162, 78, .15);
    --icon-bg: rgba(212, 162, 78, .08);
    --icon-border: rgba(212, 162, 78, .12);
    --notice-bg: rgba(255, 255, 255, .04);
    --cost-dash: rgba(255, 255, 255, .05);
    --total-border: rgba(212, 162, 78, .2);
    --toast-bg: var(--bg-card);
    --card-top-line: linear-gradient(90deg, transparent, var(--accent), transparent);
    --modal-overlay: rgba(0, 0, 0, .75);
    --input-bg: rgba(255, 255, 255, .05);
    --danger: #e05555;

    /* --- Переменные слайдера --- */
    --slider-dot: rgba(255, 255, 255, .3);       /* Цвет неактивной точки навигации */
    --slider-dot-active: var(--accent);           /* Цвет активной точки навигации */
    --slider-btn-bg: rgba(15, 13, 10, .6);        /* Фон кнопок prev/next */
    --slider-btn-hover: var(--accent);            /* Цвет кнопок prev/next при наведении */
    --slider-counter-bg: rgba(15, 13, 10, .55);  /* Фон счётчика "1 / 5" */
    --slider-caption-bg: rgba(15, 13, 10, .6);   /* Фон подписи под изображением */
}

/* ============================================================
   СВЕТЛАЯ ТЕМА
   ============================================================ */
[data-theme="light"] {
    --bg: #f2f7f2;
    --bg-card: #fff;
    --bg-card-hover: #f7fbf7;
    --fg: #1a2e1a;
    --fg-muted: #5a7a5a;
    --accent: #2d8a4e;
    --accent-glow: rgba(45, 138, 78, .2);
    --accent-dark: #1e6b38;
    --border: #d0e0d0;
    --border-light: #b8d0b8;
    --epoxy: #1a9a7a;
    --epoxy-glow: rgba(26, 154, 122, .2);
    --shadow: 0 8px 32px rgba(0, 0, 0, .08);
    --select-bg: rgba(45, 138, 78, .04);
    --btn-text: #fff;
    --result-bg: linear-gradient(135deg, rgba(45, 138, 78, .06) 0%, rgba(26, 154, 122, .04) 100%);
    --result-border: rgba(45, 138, 78, .18);
    --toggle-bg: #c8e0c8;
    --toggle-knob: #2d8a4e;
    --badge-bg: rgba(45, 138, 78, .07);
    --badge-border: rgba(45, 138, 78, .15);
    --icon-bg: rgba(45, 138, 78, .07);
    --icon-border: rgba(45, 138, 78, .12);
    --notice-bg: rgba(45, 138, 78, .04);
    --cost-dash: rgba(0, 0, 0, .07);
    --total-border: rgba(45, 138, 78, .22);
    --toast-bg: #fff;
    --card-top-line: linear-gradient(90deg, transparent, var(--accent), transparent);
    --modal-overlay: rgba(0, 0, 0, .45);
    --input-bg: rgba(45, 138, 78, .04);

    /* --- Переменные слайдера для светлой темы --- */
    --slider-dot: rgba(0, 0, 0, .25);
    --slider-btn-bg: rgba(255, 255, 255, .7);
    --slider-counter-bg: rgba(255, 255, 255, .65);
    --slider-caption-bg: rgba(255, 255, 255, .75);
}

/* ============================================================
   СБРОС И БАЗОВЫЕ СТИЛИ
   ============================================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Nunito', sans-serif;
    background: var(--bg);
    color: var(--fg);
    min-height: 100vh;
    overflow-x: hidden;
    transition: background .5s var(--transition), color .4s var(--transition);
}

/* ============================================================
   ФОНОВЫЕ СЛОИ
   ============================================================ */
.bg-layer {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

.bg-layer::before {
    content: '';
    position: absolute;
    top: -30%;
    left: -20%;
    width: 70vw;
    height: 70vw;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    animation: fb1 20s ease-in-out infinite;
}

.bg-layer::after {
    content: '';
    position: absolute;
    bottom: -20%;
    right: -15%;
    width: 60vw;
    height: 60vw;
    background: radial-gradient(circle, var(--epoxy-glow) 0%, transparent 70%);
    animation: fb2 25s ease-in-out infinite;
}

@keyframes fb1 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33%       { transform: translate(10vw, 5vh) scale(1.1); }
    66%       { transform: translate(-5vw, 10vh) scale(.95); }
}

@keyframes fb2 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50%       { transform: translate(-8vw, -8vh) scale(1.15); }
}

.wood-texture {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    opacity: .03;
    background-image:
        repeating-linear-gradient(90deg, transparent, transparent 40px, rgba(212, 162, 78, .3) 40px, rgba(212, 162, 78, .3) 41px),
        repeating-linear-gradient(92deg, transparent, transparent 80px, rgba(92, 61, 30, .4) 80px, rgba(92, 61, 30, .4) 81px);
}

.particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

.particle {
    position: absolute;
    border-radius: 50%;
    opacity: 0;
    animation: sparkle 6s ease-in-out infinite;
    background: var(--accent);
}

@keyframes sparkle {
    0%, 100% { opacity: 0; transform: translateY(0) scale(.5); }
    50%       { opacity: .5; transform: translateY(-30px) scale(1); }
}

/* ============================================================
   ОСНОВНОЙ КОНТЕЙНЕР
   ============================================================ */
.container {
    position: relative;
    z-index: 1;
    max-width: 960px;
    margin: 0 auto;
    padding: 40px 20px 60px;
}

/* ============================================================
   ШАПКА
   ============================================================ */
.header {
    text-align: center;
    margin-bottom: 48px;
    position: relative;
}

.theme-toggle {
    position: absolute;
    top: 0;
    right: 0;
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 10;
}

.theme-label {
    font-size: 12px;
    color: var(--fg-muted);
    font-weight: 600;
}

.toggle-track {
    width: 52px;
    height: 28px;
    background: var(--toggle-bg);
    border-radius: 50px;
    cursor: pointer;
    position: relative;
    border: 1px solid var(--border);
    transition: all var(--transition);
}

.toggle-track:hover { border-color: var(--accent); }

.toggle-knob {
    position: absolute;
    top: 3px;
    left: 3px;
    width: 20px;
    height: 20px;
    background: var(--toggle-knob);
    border-radius: 50%;
    transition: all .35s cubic-bezier(.4, 0, .2, 1);
    display: flex;
    align-items: center;
    justify-content: center;
}

.toggle-knob i { font-size: 10px; color: #fff; }

[data-theme="light"] .toggle-knob { left: 27px; }

.header-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--badge-bg);
    border: 1px solid var(--badge-border);
    border-radius: 50px;
    padding: 8px 20px;
    font-size: 13px;
    color: var(--accent);
    letter-spacing: 1.5px;
    text-transform: uppercase;
    font-weight: 600;
    margin-bottom: 20px;
}

.header h1 {
    font-family: 'Playfair Display', serif;
    font-size: clamp(30px, 6vw, 52px);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 14px;
    background: linear-gradient(135deg, var(--fg) 30%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header p {
    color: var(--fg-muted);
    font-size: 16px;
    max-width: 520px;
    margin: 0 auto;
    line-height: 1.6;
}

/* ============================================================
   КАРТИНКА СТОЛА (старый блок — оставлен для совместимости)
   ============================================================ */
.table-image {
    width: 100%;
    max-width: 600px;
    margin: 0 auto 48px;
    text-align: center;
}

.table-image img {
    width: 100%;
    height: auto;
    border-radius: var(--radius);
    box-shadow: 0 20px 60px rgba(0, 0, 0, .35);
    transition: box-shadow .5s var(--transition);
}

[data-theme="light"] .table-image img {
    box-shadow: 0 20px 60px rgba(0, 0, 0, .1);
}

/* ============================================================
   ██████████  СЛАЙДЕР  ██████████
   ============================================================

   Структура HTML:
   <div class="slider-section">
     <div class="slider-wrapper">
       <div class="slider-track" id="sliderTrack">
         <div class="slide active">
           <img src="slides/photo1.jpg" alt="...">
           <div class="slide-caption">Подпись (необязательно)</div>
         </div>
         ... другие слайды ...
       </div>

       <!-- Кнопки переключения -->
       <button class="slider-btn slider-btn--prev" id="sliderPrev">‹</button>
       <button class="slider-btn slider-btn--next" id="sliderNext">›</button>

       <!-- Счётчик "1 / 5" -->
       <div class="slider-counter" id="sliderCounter">1 / 5</div>
     </div>

     <!-- Точки навигации -->
     <div class="slider-dots" id="sliderDots"></div>
   </div>

   ============================================================ */

/* --- Внешняя обёртка секции слайдера --- */
.slider-section {
    width: 100%;
    max-width: 780px;          /* Максимальная ширина слайдера */
    margin: 0 auto 48px;       /* Отступ снизу перед формой */
}

/* --- Контейнер с overflow:hidden — показывает один слайд --- */
.slider-wrapper {
    position: relative;
    border-radius: var(--radius);          /* Скруглённые углы */
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, .45);  /* Тень под блоком */
    background: var(--bg-card);
    aspect-ratio: 16 / 9;                  /* Пропорция кадра — можно изменить на 4/3 */
    cursor: grab;                          /* Курсор «рука» для свайпа мышью */
}

.slider-wrapper:active { cursor: grabbing; }

[data-theme="light"] .slider-wrapper {
    box-shadow: 0 20px 60px rgba(0, 0, 0, .12);
}

/* --- Трек (лента слайдов) — двигается через transform --- */
.slider-track {
    display: flex;
    height: 100%;
    transition: transform .5s cubic-bezier(.4, 0, .2, 1);  /* Скорость и плавность анимации */
    will-change: transform;
}

/* --- Один слайд --- */
.slide {
    min-width: 100%;           /* Каждый слайд занимает 100% ширины */
    height: 100%;
    position: relative;
    flex-shrink: 0;
    overflow: hidden;
}

/* --- Изображение слайда --- */
.slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;         /* Заполняет кадр без искажений */
    object-position: center;   /* Центрирует изображение */
    display: block;
    transition: transform .6s ease;
    user-select: none;
    pointer-events: none;      /* Запрещает drag браузера */
    -webkit-user-drag: none;
}

/* Лёгкое увеличение при наведении на активный слайд */
.slide:hover img { transform: scale(1.02); }

/* --- Подпись под изображением (необязательно) --- */
.slide-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 20px 20px 16px;
    background: linear-gradient(transparent, var(--slider-caption-bg));
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: .3px;
    text-align: center;
    backdrop-filter: blur(2px);
    transform: translateY(100%);           /* Скрыта по умолчанию */
    transition: transform .3s ease;
}

/* Показываем подпись при наведении */
.slide:hover .slide-caption { transform: translateY(0); }

/* --- Кнопки PREV / NEXT --- */
.slider-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 44px;                           /* Размер кнопки */
    height: 44px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, .15);
    background: var(--slider-btn-bg);
    color: #fff;
    font-size: 22px;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(8px);
    transition: all .25s ease;
    z-index: 10;
    opacity: 0;                            /* Скрыты, пока курсор не на слайдере */
}

.slider-wrapper:hover .slider-btn { opacity: 1; }  /* Появляются при наведении */

.slider-btn:hover {
    background: var(--slider-btn-hover);
    border-color: var(--accent);
    transform: translateY(-50%) scale(1.08);
    box-shadow: 0 0 18px var(--accent-glow);
}

.slider-btn--prev { left: 14px; }          /* Отступ левой кнопки от края */
.slider-btn--next { right: 14px; }         /* Отступ правой кнопки от края */

/* Скрываем кнопки на первом/последнем слайде (добавляется через JS) */
.slider-btn.hidden { opacity: 0 !important; pointer-events: none; }

/* --- Счётчик слайдов "1 / 5" --- */
.slider-counter {
    position: absolute;
    top: 14px;                             /* Отступ от верха */
    right: 14px;                           /* Отступ от правого края */
    background: var(--slider-counter-bg);
    color: rgba(255, 255, 255, .9);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: .5px;
    padding: 5px 12px;
    border-radius: 50px;
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, .12);
    z-index: 10;
}

/* --- Точки навигации (под слайдером) --- */
.slider-dots {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;                              /* Расстояние между точками */
    margin-top: 16px;
}

.slider-dot {
    width: 8px;                            /* Размер неактивной точки */
    height: 8px;
    border-radius: 50%;
    background: var(--slider-dot);
    border: none;
    cursor: pointer;
    padding: 0;
    transition: all .3s ease;
}

.slider-dot.active {
    width: 24px;                           /* Активная точка — вытягивается в pill */
    border-radius: 4px;
    background: var(--slider-dot-active);
    box-shadow: 0 0 8px var(--accent-glow);
}

.slider-dot:hover:not(.active) {
    background: rgba(212, 162, 78, .5);
    transform: scale(1.3);
}

/* --- Плейсхолдер, если папка slides пуста --- */
.slider-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    color: var(--fg-muted);
    background: var(--bg-card);
}

.slider-placeholder i { font-size: 48px; color: var(--border-light); }
.slider-placeholder p  { font-size: 14px; }

/* --- Адаптив для мобильных --- */
@media (max-width: 640px) {
    .slider-btn { width: 36px; height: 36px; font-size: 18px; }
    .slider-btn--prev { left: 8px; }
    .slider-btn--next { right: 8px; }
    .slider-counter { font-size: 11px; padding: 4px 10px; }
}

/* ============================================================
   СЕТКА ПАРАМЕТРОВ
   ============================================================ */
.params-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
    margin-bottom: 32px;
}

.param-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.param-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--card-top-line);
    opacity: 0;
    transition: opacity var(--transition);
}

.param-card:hover {
    border-color: var(--border-light);
    background: var(--bg-card-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.param-card:hover::before { opacity: 1; }

.param-label {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.param-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--icon-bg);
    border: 1px solid var(--icon-border);
    border-radius: var(--radius-sm);
    color: var(--accent);
    font-size: 15px;
    flex-shrink: 0;
}

.param-label > div > span {
    font-weight: 700;
    font-size: 14px;
    letter-spacing: .3px;
    display: block;
}

.param-sublabel {
    font-size: 11px;
    color: var(--fg-muted);
    font-weight: 400;
    margin-top: 2px;
}

/* ============================================================
   SELECT / ВЫПАДАЮЩИЙ СПИСОК
   ============================================================ */
.select-wrapper { position: relative; }

.select-wrapper::after {
    content: '\f107';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--fg-muted);
    font-size: 13px;
    pointer-events: none;
    transition: color var(--transition);
}

.select-wrapper:hover::after { color: var(--accent); }

select {
    width: 100%;
    appearance: none;
    -webkit-appearance: none;
    background: var(--select-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 12px 40px 12px 14px;
    color: var(--fg);
    font-family: 'Nunito', sans-serif;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    outline: none;
}

select:hover  { border-color: var(--border-light); background: var(--bg-card-hover); }
select:focus  { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }
select option { background: var(--bg-card); color: var(--fg); }

/* ============================================================
   КАРТОЧКА РЕЗУЛЬТАТА
   ============================================================ */
.result-card {
    background: var(--result-bg);
    border: 1px solid var(--result-border);
    border-radius: 18px;
    padding: 32px;
    position: relative;
    overflow: hidden;
    transition: background .5s var(--transition), border-color .4s var(--transition);
}

.result-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: conic-gradient(from 0deg, transparent 0%, var(--accent-glow) 25%, transparent 50%, var(--epoxy-glow) 75%, transparent 100%);
    animation: rbg 30s linear infinite;
    opacity: .5;
}

@keyframes rbg { to { transform: rotate(360deg); } }

.result-inner { position: relative; z-index: 1; }

.result-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 12px;
}

.result-title {
    font-family: 'Playfair Display', serif;
    font-size: 22px;
    font-weight: 700;
}

.result-notice {
    font-size: 12px;
    color: var(--fg-muted);
    background: var(--notice-bg);
    border: 1px solid var(--border);
    border-radius: 50px;
    padding: 6px 14px;
}

/* ============================================================
   СТРОКИ СТОИМОСТИ
   ============================================================ */
.cost-breakdown {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 24px;
}

.cost-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px dashed var(--cost-dash);
    font-size: 14px;
    opacity: 0;
    transform: translateX(-10px);
    animation: fr .4s forwards;
}

.cost-row:last-child { border-bottom: none; }

@keyframes fr { to { opacity: 1; transform: translateX(0); } }

.cost-row-label {
    color: var(--fg-muted);
    display: flex;
    align-items: center;
    gap: 8px;
}

.cost-row-label i { font-size: 11px; color: var(--accent); width: 16px; text-align: center; }

.cost-row-value { font-weight: 700; color: var(--fg); font-variant-numeric: tabular-nums; }

/* ============================================================
   БЛОКИ ВЕС / ДОСТАВКА
   ============================================================ */
.info-blocks {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 24px;
}

.info-block {
    border-radius: var(--radius);
    padding: 16px 18px;
    transition: all var(--transition);
}

.info-block.weight  { background: rgba(45, 212, 191, .06); border: 1px solid rgba(45, 212, 191, .15); }
.info-block.shipping { background: rgba(212, 162, 78, .06);  border: 1px solid rgba(212, 162, 78, .15); }

[data-theme="light"] .info-block.weight   { background: rgba(26, 154, 122, .06); border-color: rgba(26, 154, 122, .15); }
[data-theme="light"] .info-block.shipping { background: rgba(45, 138, 78,  .06); border-color: rgba(45, 138, 78,  .15); }

.info-block-label {
    font-size: 12px;
    color: var(--fg-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.info-block-label i { font-size: 13px; }
.info-block.weight   .info-block-label i { color: var(--epoxy); }
.info-block.shipping .info-block-label i { color: var(--accent); }

.info-block-value { font-family: 'Playfair Display', serif; font-size: 26px; font-weight: 900; }
.info-block.weight   .info-block-value { color: var(--epoxy); }
.info-block.shipping .info-block-value { color: var(--accent); font-size: 16px; line-height: 1.5; }

.info-block-sub { font-size: 11px; color: var(--fg-muted); margin-top: 4px; }

/* ============================================================
   ИТОГОВАЯ СТРОКА / ЦЕНА
   ============================================================ */
.total-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 0 0;
    border-top: 2px solid var(--total-border);
    margin-top: 4px;
}

.total-label { font-size: 16px; font-weight: 700; display: flex; align-items: center; gap: 8px; }

.total-price {
    font-family: 'Playfair Display', serif;
    font-size: clamp(28px, 5vw, 42px);
    font-weight: 900;
    color: var(--accent);
    transition: color .4s var(--transition);
    font-variant-numeric: tabular-nums;
}

.total-price.updated { animation: pf .5s ease; }

@keyframes pf {
    0%   { transform: scale(1); }
    30%  { transform: scale(1.08); filter: brightness(1.3); }
    100% { transform: scale(1); }
}

/* ============================================================
   КНОПКА ЗАКАЗА
   ============================================================ */
.order-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    margin-top: 24px;
    padding: 16px 32px;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    color: var(--btn-text);
    font-family: 'Nunito', sans-serif;
    font-size: 16px;
    font-weight: 800;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
    letter-spacing: .5px;
}

.order-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, .2), transparent);
    transition: left .6s var(--transition);
}

.order-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 30px var(--accent-glow); }
.order-btn:hover::before { left: 100%; }
.order-btn:active { transform: translateY(0); }

/* ============================================================
   ПОДСКАЗКА И ЗАГРУЗКА КОНФИГА
   ============================================================ */
.info-note {
    text-align: center;
    margin-top: 24px;
    font-size: 12px;
    color: var(--fg-muted);
    line-height: 1.7;
}

.info-note i { color: var(--accent); margin-right: 4px; }

.config-load {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: none;
    border: 1px dashed var(--border);
    border-radius: var(--radius-sm);
    padding: 6px 14px;
    color: var(--fg-muted);
    font-family: inherit;
    font-size: 11px;
    cursor: pointer;
    transition: all var(--transition);
    margin-top: 8px;
}

.config-load:hover { border-color: var(--accent); color: var(--accent); }

/* ============================================================
   МОДАЛЬНОЕ ОКНО
   ============================================================ */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--modal-overlay);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 0;
    pointer-events: none;
    transition: opacity .35s var(--transition);
    backdrop-filter: blur(6px);
}

.modal-overlay.active { opacity: 1; pointer-events: auto; }

.modal {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 32px;
    width: 100%;
    max-width: 440px;
    transform: translateY(30px) scale(.96);
    transition: transform .4s cubic-bezier(.4, 0, .2, 1);
    box-shadow: 0 24px 64px rgba(0, 0, 0, .4);
    position: relative;
}

.modal-overlay.active .modal { transform: translateY(0) scale(1); }

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: 1px solid var(--border);
    border-radius: 50%;
    color: var(--fg-muted);
    cursor: pointer;
    font-size: 14px;
    transition: all var(--transition);
}

.modal-close:hover { border-color: var(--danger); color: var(--danger); }

.modal h2        { font-family: 'Playfair Display', serif; font-size: 22px; font-weight: 700; margin-bottom: 6px; }
.modal-subtitle  { color: var(--fg-muted); font-size: 13px; margin-bottom: 24px; line-height: 1.5; }
.modal-field     { margin-bottom: 16px; }

.modal-field label {
    display: block;
    font-size: 13px;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--fg-muted);
}

.modal-field input {
    width: 100%;
    background: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 12px 14px;
    color: var(--fg);
    font-family: 'Nunito', sans-serif;
    font-size: 14px;
    font-weight: 600;
    outline: none;
    transition: all var(--transition);
}

.modal-field input::placeholder { color: var(--fg-muted); opacity: .5; font-weight: 400; }
.modal-field input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }
.modal-field input.error { border-color: var(--danger); box-shadow: 0 0 0 3px rgba(224, 85, 85, .15); }

.modal-field .field-error { font-size: 11px; color: var(--danger); margin-top: 4px; display: none; }
.modal-field input.error ~ .field-error { display: block; }

.modal-summary {
    background: var(--notice-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 14px;
    margin-bottom: 20px;
    font-size: 13px;
    color: var(--fg-muted);
    line-height: 1.7;
}

.modal-summary strong { color: var(--fg); }

.modal-submit {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    color: var(--btn-text);
    font-family: 'Nunito', sans-serif;
    font-size: 15px;
    font-weight: 800;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all var(--transition);
}

.modal-submit:hover    { transform: translateY(-1px); box-shadow: 0 6px 20px var(--accent-glow); }
.modal-submit:disabled { opacity: .5; cursor: not-allowed; transform: none; box-shadow: none; }

.modal-submit .spinner {
    display: none;
    width: 18px;
    height: 18px;
    border: 2px solid transparent;
    border-top-color: var(--btn-text);
    border-radius: 50%;
    animation: spin .6s linear infinite;
}

.modal-submit.loading .spinner   { display: block; }
.modal-submit.loading .btn-text  { display: none; }

@keyframes spin { to { transform: rotate(360deg); } }

/* ============================================================
   ТОСТ-УВЕДОМЛЕНИЕ
   ============================================================ */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--toast-bg);
    border: 1px solid var(--accent);
    border-radius: var(--radius);
    padding: 14px 24px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    font-weight: 600;
    color: var(--fg);
    box-shadow: 0 12px 40px rgba(0, 0, 0, .3);
    z-index: 1100;
    opacity: 0;
    transition: all .5s cubic-bezier(.4, 0, .2, 1);
    pointer-events: none;
    max-width: 90vw;
}

.toast.show   { opacity: 1; transform: translateX(-50%) translateY(0); pointer-events: auto; }
.toast.error  { border-color: var(--danger); }
.toast.error i { color: var(--danger); }
.toast i      { color: var(--accent); font-size: 18px; }

/* ============================================================
   ЭКРАН ВХОДА (LOGIN)
   ============================================================ */
.login-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--modal-overlay);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    backdrop-filter: blur(4px);
}

.login-overlay.hidden { display: none; }

.login-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 40px;
    box-shadow: var(--shadow);
    width: 100%;
    max-width: 380px;
    animation: slideUp .4s ease;
}

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

.login-header        { text-align: center; margin-bottom: 30px; }
.login-header i      { font-size: 48px; color: var(--accent); display: block; margin-bottom: 15px; }
.login-header h2     { font-size: 24px; font-weight: 700; color: var(--fg); margin: 0; }
.login-group         { margin-bottom: 20px; }

.login-group label {
    display: block;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--fg-muted);
    margin-bottom: 8px;
    letter-spacing: .5px;
}

.login-group input {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--input-bg);
    color: var(--fg);
    font-family: inherit;
    font-size: 14px;
    outline: none;
    transition: all .3s ease;
}

.login-group input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }

.login-btn {
    width: 100%;
    padding: 12px;
    background: var(--accent);
    color: var(--btn-text);
    border: none;
    border-radius: 8px;
    font-family: inherit;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    transition: all .3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.login-btn:hover { background: var(--accent-dark); transform: translateY(-2px); box-shadow: 0 8px 20px var(--accent-glow); }

/* ============================================================
   АДАПТИВ
   ============================================================ */
@media (max-width: 640px) {
    .container     { padding: 24px 14px 40px; }
    .params-grid   { grid-template-columns: 1fr; }
    .result-card   { padding: 22px 18px; }
    .theme-toggle  { position: relative; top: auto; right: auto; justify-content: center; margin-bottom: 16px; }
    .info-blocks   { grid-template-columns: 1fr; }
    .modal         { padding: 24px 20px; }
}

/* ============================================================
   ДОСТУПНОСТЬ — уменьшение анимаций
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: .01ms !important;
        transition-duration: .01ms !important;
    }
}