/*
 * main.css — Основные стили приложения.
 * Содержит дизайн-токены (цвета, скругления, тени), базовый reset,
 * компоненты (header, buttons, pills, cards) и стили всех страниц.
 */

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   Design Tokens
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
:root {
    --color-cream: #FFFFFF;
    --color-green: #2F5A43;
    --color-graphite: #18231D;
    --color-white: #FFFFFF;

    --radius-card: 30px;
    --radius-pill: 50px;

    --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.05);

    --font-family: 'Inter', Arial, Helvetica, sans-serif;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--color-white);
    color: var(--color-graphite);
    line-height: 1.6;
    min-height: 100vh;
}

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

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Base Typography & Defaults */
.bg-layer {
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    overflow: hidden;
    background: var(--color-white);
}

.bg-layer::before {
    content: "";
    position: absolute;
    left: 50%;
    top: -160px;
    width: 2450px;
    height: 560px;
    margin-left: -1224px;
    transform: translate3d(0, 0, 0) rotate(-12deg);
    -webkit-transform: translate3d(0, 0, 0) rotate(-12deg);
    will-change: transform;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    transform-origin: center;
    background: linear-gradient(90deg,
        rgba(255, 255, 255, 0) 0%,
        rgba(255, 255, 255, 0.35) 35%,
        rgba(47, 90, 67, 0.45) 100%);
}

.bg-layer::after {
    content: "";
    position: absolute;
    left: 50%;
    /* Уводим блок сильно вниз, чтобы опустить видимую верхнюю грань */
    bottom: -400px;
    width: 2160px;
    height: 630px;
    margin-left: -1152px;
    transform: translate3d(0, 0, 0) rotate(10deg);
    -webkit-transform: translate3d(0, 0, 0) rotate(10deg);
    will-change: transform;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    transform-origin: center;
    background: linear-gradient(90deg,
        rgba(47, 90, 67, 0.45) 0%,
        rgba(47, 90, 67, 0.25) 45%,
        rgba(255, 255, 255, 0) 100%);
}


/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   Header
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.header {
    background: var(--color-white);
    box-shadow: var(--shadow-soft);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header .container {
    max-width: 100%;
    padding: 0 30px;
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 70px;
}

.header__logo {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-green);
}

.header__nav {
    display: flex;
    gap: 28px;
    align-self: stretch;
}

.header__link {
    display: flex;
    align-items: center;
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    transition: color 0.2s;
}
.header__link:hover { color: var(--color-green); }

.header__link--active {
    color: var(--color-green);
    font-weight: 600;
}

/* Элемент зеленой линии на уровне низа меню (высота header 70px, центрировано) */
.header__link--active::after {
    content: "";
    position: absolute;
    bottom: 0px;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: var(--color-green);
    border-radius: 3px 3px 0 0;
}

.header__user {
    display: flex;
    align-items: center;
    gap: 12px;
}

.header__username {
    font-weight: 600;
    font-size: 0.95rem;
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   Buttons (pill shape)
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 32px;
    background: var(--color-green);
    color: var(--color-white);
    font-weight: 600;
    font-size: 0.95rem;
    border: none;
    border-radius: var(--radius-pill);
    cursor: pointer;
    transition: opacity 0.2s, transform 0.15s;
    text-decoration: none;
}
.btn:hover { opacity: 0.88; transform: translateY(-1px); }

.btn--small { padding: 8px 20px; font-size: 0.85rem; }

.btn--outline {
    background: transparent;
    color: var(--color-green);
    border: 1.5px solid var(--color-green);
}
.btn--outline:hover { background: var(--color-green); color: var(--color-white); }

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

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   Pill label
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.pill {
    display: inline-block;
    padding: 6px 22px;
    border: 1.5px solid var(--color-green);
    border-radius: var(--radius-pill);
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--color-green);
    white-space: nowrap;
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   Cards (generic)
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.card {
    background: var(--color-white);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-soft);
    border: 1px solid #EAEAEA;
    padding: 28px;
    transition: transform 0.2s, box-shadow 0.2s;
}
a.card:hover, .card.interactive:hover {
    transform: translateY(-4px);
    box-shadow: 0 14px 36px rgba(0, 0, 0, 0.08);
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   Number Cards Grid  (page: /numbers)
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.numbers-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: flex-start;
    padding: 20px 0 40px;
    max-width: 1130px;
    margin: 0 auto;
}

.number-card {
    background: var(--color-white);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-soft);
    border: 1px solid #EAEAEA;
    width: 210px;
    height: 210px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 14px;
    padding: 24px;
    transition: transform 0.2s, box-shadow 0.2s;
}
.number-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 14px 36px rgba(0, 0, 0, 0.08);
}

.number-card__title {
    display: inline-block;
    padding: 8px 18px;
    border: 1.5px solid var(--color-green);
    border-radius: var(--radius-pill);
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--color-green);
    text-align: center;
    line-height: 1.3;
    max-width: 100%;
}

.number-card__desc {
    font-size: 0.85rem;
    text-align: center;
    color: #666;
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   Links Page  (page: /links)
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.links-layout {
    display: flex;
    gap: 30px;
    padding: 40px 0;
    align-items: flex-start;
    max-width: 900px;
    margin: 0 auto;
}

.links-sidebar {
    flex: 0 0 260px;
    background: var(--color-white);
    border-radius: var(--radius-card);
    border: 1px solid #EAEAEA;
    box-shadow: var(--shadow-soft);
    padding: 28px;
    position: sticky;
    top: 90px;
}

.links-sidebar__title {
    font-weight: 700;
    margin-bottom: 16px;
}

.links-sidebar__item {
    display: block;
    padding: 10px 16px;
    border-radius: var(--radius-pill);
    font-weight: 600; /* Увеличили толщину шрифта (с 500 на 600) */
    font-size: 0.95rem; /* Немного увеличили размер текста */
    transition: background 0.2s;
    cursor: pointer;
}
.links-sidebar__item:hover,
.links-sidebar__item--active {
    background: var(--color-cream);
    color: var(--color-green);
}

.links-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.resource-row {
    display: flex;
    align-items: center;
    gap: 14px;
    background: var(--color-white);
    border-radius: var(--radius-card);
    border: 1px solid #EAEAEA;
    box-shadow: var(--shadow-soft);
    padding: 18px 24px;
    transition: transform 0.15s;
}
.resource-row:hover {
    transform: translateY(-2px);
}

.resource-row__icon { font-size: 1.3rem; }
.resource-row__title { flex: 1; font-weight: 500; }
.resource-row__arrow { font-size: 1.1rem; color: var(--color-green); }

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   Login Page
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.login-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - 180px);
}

.login-card {
    background: var(--color-white);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-soft);
    border: 1px solid #EAEAEA;
    padding: 48px 40px;
    width: 100%;
    max-width: 420px;
}

.login-card__title {
    text-align: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 32px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.form-group input:not([type="radio"]):not([type="checkbox"]) {
    width: 100%;
    padding: 12px 18px;
    border: 1.5px solid #ddd;
    border-radius: var(--radius-pill);
    font-family: var(--font-family);
    font-size: 0.95rem;
    outline: none;
    transition: border-color 0.2s;
}
.form-group input:not([type="radio"]):not([type="checkbox"]):focus { border-color: var(--color-green); }

.form-select {
    width: 100%;
    padding: 12px 18px;
    border: 1.5px solid #ddd;
    border-radius: var(--radius-pill);
    font-family: var(--font-family);
    font-size: 0.95rem;
    outline: none;
    transition: border-color 0.2s;
    background-color: var(--color-white);
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%232F5A43' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1.2em;
    cursor: pointer;
}
.form-select:focus { border-color: var(--color-green); }



.login-error {
    color: #c0392b;
    text-align: center;
    font-size: 0.9rem;
    margin-bottom: 16px;
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   Admin Panel
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.admin-section { padding-bottom: 40px; }

.admin-section__title {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 24px;
}

.users-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0 10px;
}

.users-table th {
    text-align: left;
    padding: 12px 16px;
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: #999;
}

.users-table td {
    background: var(--color-white);
    padding: 16px;
    font-size: 0.95rem;
    border-top: 1px solid #EAEAEA;
    border-bottom: 1px solid #EAEAEA;
}

.users-table tr td:first-child {
    border-radius: var(--radius-card) 0 0 var(--radius-card);
    border-left: 1px solid #EAEAEA;
}
.users-table tr td:last-child  {
    border-radius: 0 var(--radius-card) var(--radius-card) 0;
    border-right: 1px solid #EAEAEA;
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   Page title
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.page-title {
    text-align: center;
    margin-top: 40px;
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   Main & Footer
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.main { flex: 1; }

.footer {
    margin-top: 60px;
    padding: 20px 0;
    text-align: center;
    font-size: 0.85rem;
    color: #999;
}

/* Utility — flex page layout */
body {
    display: flex;
    flex-direction: column;
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   Number Detail — КР / ДЗ tabs
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.number-detail { padding: 40px 0; }

.tabs {
    display: flex;
    justify-content: flex-start;
    gap: 32px;
    margin: 28px auto 12px;
    max-width: 1130px;
}

.tab {
    padding: 10px 0;
    border: none;
    border-bottom: 2px solid transparent;
    border-radius: 0;
    margin-bottom: -2px;
    background: transparent;
    color: #666;
    font-family: var(--font-family);
    font-weight: 500;
    font-size: 1.05rem;
    cursor: pointer;
    transition: color 0.2s, border-color 0.2s;
}
.tab:hover {
    color: var(--color-green);
    background: transparent;
}
.tab--active {
    background: transparent;
    color: var(--color-green);
    border-bottom: 2px solid var(--color-green);
    font-weight: 600;
}

.tab-panel { display: none; }
.tab-panel--active { display: block; }



.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: #999;
    font-size: 1rem;
}

/* Role toggle (segmented) */
.role-toggle {
    position: relative;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 24px;
}

.role-toggle input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.role-toggle label {
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.95rem;
    color: #6f6f6f;
    border: 2px solid #d8d8d8;
    border-radius: var(--radius-pill);
    height: 50px;
    background: var(--color-white);
    transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
}

#role-admin:checked + label,
#role-user:checked + label {
    color: var(--color-green);
    border-color: var(--color-green);
    background: rgba(47, 90, 67, 0.08);
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   Variants Group Titles
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.variants-group {
    max-width: 1130px;
    margin: 0 auto 10px;
}

.variants-group__title {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--color-graphite);
    margin-bottom: 15px;
    padding-left: 0;
    text-align: left;
}

.variants-group .numbers-grid {
    padding-top: 0;
}

.variants-author-section {
    margin-top: 25px;
}

.variants-author-section .numbers-grid {
    padding-top: 0;
    padding-bottom: 5px; /* Уменьшен нижний отступ, чтобы следующий автор был ближе */
}

.variants-author__title {
    font-size: 1.05rem;
    font-weight: 500;
    color: #555;
    margin-bottom: 10px;
    text-align: left;
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   Hero Background Section
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.hero-section {
    position: relative;
    text-align: center;
    padding: 80px 0;
}

.hero-bg-illustration {
    position: absolute;
    /* Поднимаем еще чуть выше */
    top: 48%;
    /* Привязываем математически к самому левому краю окна браузера */
    left: calc(50% - 50vw);
    transform: translateY(-50%);
    width: 550px;
    z-index: -1;
    pointer-events: none;
    
    /* Делаем цвета более пастельными в стилистике сайта:
       Убавляем насыщенность, немного повышаем яркость и ставим прозрачность.
       Смешивание Multiply делает цвета мягкими, наслаиваясь на фон */
    opacity: 0.18;
    filter: saturate(0.6) brightness(1.2) hue-rotate(-5deg);
    mix-blend-mode: multiply;
}

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