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

body {
    font-family: var(--font);
    color: var(--text);
    background: var(--bg);
    background-image: var(--grad-bg);
    background-attachment: fixed;
    min-height: 100vh;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    transition: background-color var(--t-slow), color var(--t-slow);
    overflow-x: hidden;
}

a { color: var(--accent); text-decoration: none; transition: color var(--t-fast); }
a:hover { color: var(--accent-2); }

h1, h2, h3 { margin: 0 0 8px; font-weight: 800; letter-spacing: -.02em; line-height: 1.15; }
h1 { font-size: 32px; }
h2 { font-size: 20px; }
h3 { font-size: 18px; }

p { margin: 0 0 8px; }
code { font-family: 'JetBrains Mono', 'Fira Code', monospace; }

::selection { background: var(--accent); color: #fff; }

/* Кастомный скроллбар */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
    background: var(--border-hi);
    border-radius: var(--r-full);
    transition: background var(--t-fast);
}
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* =============================================================
   NAV
============================================================= */
.mainnav {
    position: sticky; top: 0; z-index: 90;
    display: flex; align-items: center; gap: 6px;
    padding: 12px 24px;
    background: color-mix(in srgb, var(--bg) 75%, transparent);
    backdrop-filter: blur(20px) saturate(140%);
    -webkit-backdrop-filter: blur(20px) saturate(140%);
    border-bottom: 1px solid var(--border);
}

.nav-logo {
    font-size: 26px; font-weight: 800; padding: 6px 10px;
    margin-right: 6px; border-radius: var(--r-sm);
    transition: transform var(--t);
}
.nav-logo:hover { transform: scale(1.15) rotate(-6deg); }

.mainnav > a:not(.nav-logo) {
    color: var(--text-2);
    padding: 8px 14px; border-radius: var(--r-full);
    font-weight: 600; font-size: 14px;
    transition: all var(--t-fast);
    white-space: nowrap;
}
.mainnav > a:not(.nav-logo):hover {
    color: var(--text);
    background: var(--card-2);
    transform: translateY(-1px);
}

.nav-right { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.user-chip {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 6px 14px; border-radius: var(--r-full);
    background: var(--card-2); color: var(--text-2);
    font-size: 13px; font-weight: 600;
    border: 1px solid var(--border);
}

/* Переключатель тем */
.theme-switcher {
    display: flex; gap: 4px; margin-left: 10px;
    padding: 4px; border-radius: var(--r-full);
    background: var(--card-2);
    border: 1px solid var(--border);
}
.theme-switcher button {
    width: 30px; height: 30px; padding: 0;
    border-radius: 50%; border: none;
    background: transparent; cursor: pointer;
    font-size: 15px; line-height: 1;
    transition: all var(--t);
}
.theme-switcher button:hover { transform: scale(1.2); }
.theme-switcher button.active {
    background: var(--card-hi);
    box-shadow: 0 0 0 2px var(--accent);
}

/* =============================================================
   КОНТЕЙНЕР
============================================================= */
.container {
    max-width: 1080px;
    margin: 0 auto;
    padding: 28px 24px 80px;
    animation: fadeUp .5s ease both;
}

.topbar {
    display: flex; justify-content: space-between; align-items: flex-start;
    gap: 16px; margin-bottom: 28px; flex-wrap: wrap;
}
.topbar h1 { font-size: 30px; }
.topbar .muted { color: var(--muted); font-size: 14px; margin-top: 4px; }

/* =============================================================
   КНОПКИ
============================================================= */
button, .btn, .btn-primary, .btn-ghost {
    font-family: inherit;
    cursor: pointer;
    border: none;
    transition: all var(--t-fast);
    font-weight: 600;
    font-size: 14px;
}

.btn-primary {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 11px 20px; border-radius: var(--r-full);
    background: var(--grad-accent);
    color: #fff;
    box-shadow: 0 6px 20px var(--glow);
    position: relative;
    overflow: hidden;
}
.btn-primary::after {
    content: ''; position: absolute; inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,.3), transparent 60%);
    opacity: 0; transition: opacity var(--t);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 28px var(--glow);
}
.btn-primary:hover::after { opacity: 1; }
.btn-primary:active { transform: translateY(0); }
.btn-primary.disabled, .btn-primary:disabled {
    opacity: .45; pointer-events: none;
}

.btn-ghost {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 10px 16px; border-radius: var(--r-full);
    background: var(--card-2); color: var(--text-2);
    border: 1px solid var(--border);
    text-decoration: none;
}
.btn-ghost:hover {
    color: var(--text);
    background: var(--card-hi);
    border-color: var(--border-hi);
    transform: translateY(-1px);
}
.small-btn { padding: 7px 13px; font-size: 13px; }

/* =============================================================
   КАРТОЧКИ
============================================================= */
.card {
    background: var(--card);
    background-image: var(--grad-card);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    padding: 24px;
    margin-bottom: 18px;
    box-shadow: 0 10px 30px var(--shadow);
    animation: fadeUp .5s ease both;
    position: relative;
    overflow: hidden;
}
.card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-hi), transparent);
}
.card h2 {
    display: flex; align-items: center; gap: 8px;
    margin-bottom: 18px; font-size: 18px;
}

.card-head {
    display: flex; justify-content: space-between; align-items: center;
    gap: 12px; flex-wrap: wrap; margin-bottom: 18px;
}
.card-head h2 { margin: 0; }

/* Сетка карточек */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-bottom: 18px;
}

/* =============================================================
   ЛОГИН
============================================================= */
.login-wrap {
    min-height: 100vh;
    display: grid; place-items: center;
    padding: 24px;
    position: relative;
    overflow: hidden;
}
.login-wrap::before,
.login-wrap::after {
    content: ''; position: absolute;
    width: 500px; height: 500px;
    border-radius: 50%;
    filter: blur(120px);
    opacity: .35;
    pointer-events: none;
    animation: float 18s ease-in-out infinite;
}
.login-wrap::before {
    background: var(--accent);
    top: -150px; left: -150px;
}
.login-wrap::after {
    background: var(--accent-2);
    bottom: -150px; right: -150px;
    animation-delay: -9s;
}
@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(60px, -40px) scale(1.15); }
}

.login-card {
    position: relative;
    background: var(--card);
    background-image: var(--grad-card);
    padding: 44px 40px;
    border-radius: var(--r-xl);
    width: 100%;
    max-width: 420px;
    border: 1px solid var(--border-hi);
    box-shadow: 0 30px 80px var(--shadow), 0 0 0 1px var(--border);
    animation: pop .55s cubic-bezier(.2,1.2,.3,1);
    z-index: 1;
}
.login-card::before {
    content: ''; position: absolute; inset: 0;
    border-radius: inherit;
    padding: 1px;
    background: linear-gradient(135deg, var(--accent), transparent 60%, var(--accent-2));
    -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: .5;
    pointer-events: none;
}

.login-card h1 {
    text-align: center;
    font-size: 30px;
    margin-bottom: 6px;
    background: var(--grad-accent);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.subtitle {
    text-align: center;
    color: var(--muted);
    margin-bottom: 28px;
    font-size: 14px;
}

.login-card input {
    width: 100%;
    padding: 15px 18px;
    margin-bottom: 12px;
    border-radius: var(--r-md);
    border: 1.5px solid var(--border);
    background: var(--bg-2);
    color: var(--text);
    font-size: 15px;
    font-family: inherit;
    transition: all var(--t);
}
.login-card input::placeholder { color: var(--muted); }
.login-card input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 20%, transparent);
    background: var(--card-2);
}

.login-card button[type="submit"] {
    width: 100%;
    padding: 15px;
    border-radius: var(--r-md);
    background: var(--grad-accent);
    color: #fff;
    font-size: 16px;
    font-weight: 700;
    box-shadow: 0 10px 30px var(--glow);
    margin-top: 6px;
}
.login-card button[type="submit"]:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 40px var(--glow);
}

.flash {
    padding: 12px 16px;
    border-radius: var(--r-md);
    margin-bottom: 14px;
    font-size: 14px;
    animation: shake .4s ease;
}
.flash-error {
    background: color-mix(in srgb, var(--bad) 18%, transparent);
    color: var(--bad);
    border: 1px solid color-mix(in srgb, var(--bad) 40%, transparent);
}
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-6px); }
    75% { transform: translateX(6px); }
}

/* =============================================================
   ГЕРОЙ-БЛОК УЧЕНИКА
============================================================= */
.hero {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 24px;
    align-items: center;
    padding: 28px;
    margin-bottom: 20px;
    border-radius: var(--r-xl);
    background: var(--card);
    background-image:
        radial-gradient(circle at top right, color-mix(in srgb, var(--accent) 25%, transparent), transparent 60%),
        var(--grad-card);
    border: 1px solid var(--border-hi);
    box-shadow: 0 20px 50px var(--shadow);
    position: relative;
    overflow: hidden;
    animation: fadeUp .5s ease both;
}
.hero-avatar {
    width: 96px; height: 96px;
    border-radius: 50%;
    display: grid; place-items: center;
    font-size: 54px;
    background: var(--bg-2);
    border: 3px solid var(--accent);
    box-shadow: 0 0 40px var(--glow);
    animation: breathe 4s ease-in-out infinite;
    flex-shrink: 0;
}
@keyframes breathe {
    0%, 100% { box-shadow: 0 0 30px var(--glow); }
    50% { box-shadow: 0 0 55px var(--glow); }
}
.hero-info h1 { font-size: 28px; margin-bottom: 4px; }
.hero-info .subtitle { text-align: left; margin: 0; }
.hero-stats {
    display: flex; gap: 12px; flex-wrap: wrap;
}
.hero-stat {
    text-align: center;
    padding: 12px 18px;
    border-radius: var(--r-md);
    background: var(--card-2);
    border: 1px solid var(--border);
    min-width: 84px;
}
.hero-stat .num { font-size: 22px; font-weight: 800; color: var(--accent); line-height: 1; }
.hero-stat .lbl { font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: .5px; margin-top: 4px; }

/* =============================================================
   СТАТУС / ПРОГРЕСС / РЕЙТИНГ
============================================================= */
.status-card {
    text-align: center;
    border: 2px solid var(--accent);
    background:
        radial-gradient(circle at top, color-mix(in srgb, var(--accent) 18%, transparent), transparent 70%),
        var(--card);
}
.status-icon {
    font-size: 56px; margin-bottom: 6px;
    filter: drop-shadow(0 6px 20px var(--glow));
    animation: bob 3s ease-in-out infinite;
}
@keyframes bob {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-6px); }
}
.status-name { font-size: 22px; font-weight: 800; color: var(--accent); }
.status-level { color: var(--muted); margin-top: 4px; font-size: 14px; }

.label {
    color: var(--muted);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 700;
    margin-bottom: 10px;
}

.progress {
    height: 14px;
    background: var(--bg-2);
    border-radius: var(--r-full);
    overflow: hidden;
    margin: 10px 0;
    box-shadow: inset 0 2px 4px var(--shadow);
    position: relative;
}
.progress-bar {
    height: 100%;
    background: var(--grad-accent);
    border-radius: var(--r-full);
    transition: width .8s cubic-bezier(.2,1,.3,1);
    position: relative;
    box-shadow: 0 0 20px var(--glow);
}
.progress-bar::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,.4), transparent);
    animation: shimmer 2.2s ease-in-out infinite;
}
@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.xp-total {
    font-size: 26px;
    font-weight: 800;
    background: var(--grad-accent);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-top: 10px;
}

.rank-card { text-align: center; }
.rank-big { font-size: 42px; font-weight: 900; line-height: 1; }
.rank-big .muted { font-size: 16px; }
.medal { font-size: 44px; margin-top: 8px; animation: bob 3s ease-in-out infinite; }

/* =============================================================
   ДЗ
============================================================= */
.hw-list { display: flex; flex-direction: column; gap: 12px; }
.hw-item {
    position: relative;
    padding: 18px 20px 18px 24px;
    border-radius: var(--r-md);
    background: var(--card-2);
    border: 1px solid var(--border);
    transition: all var(--t);
    overflow: hidden;
}
.hw-item::before {
    content: '';
    position: absolute;
    left: 0; top: 0; bottom: 0;
    width: 4px;
    background: var(--accent);
    transition: width var(--t);
}
.hw-item:hover {
    transform: translateX(4px);
    border-color: var(--border-hi);
    box-shadow: 0 8px 24px var(--shadow);
}
.hw-item:hover::before { width: 6px; }
.hw-item.confirmed::before { background: var(--good); }
.hw-item.confirmed {
    background: linear-gradient(90deg, color-mix(in srgb, var(--good) 10%, var(--card-2)), var(--card-2));
}

.hw-head {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
    align-items: flex-start;
    margin-bottom: 8px;
}
.hw-subject {
    display: inline-block;
    background: var(--grad-accent);
    color: #fff;
    padding: 3px 10px;
    border-radius: var(--r-full);
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .5px;
    margin-right: 8px;
    vertical-align: middle;
}
.hw-title { font-weight: 700; font-size: 16px; vertical-align: middle; }
.hw-reward {
    color: var(--gold);
    font-weight: 700;
    font-size: 13px;
    white-space: nowrap;
    padding: 4px 10px;
    background: color-mix(in srgb, var(--gold) 12%, transparent);
    border-radius: var(--r-full);
    border: 1px solid color-mix(in srgb, var(--gold) 30%, transparent);
}

.hw-foot {
    display: flex; gap: 12px; align-items: center;
    margin-top: 12px; flex-wrap: wrap;
}

.hw-done-btn {
    padding: 9px 16px;
    border-radius: var(--r-full);
    background: var(--grad-accent);
    color: #fff;
    font-weight: 700;
    font-size: 13px;
    margin-left: auto;
    box-shadow: 0 4px 14px var(--glow);
    transition: all var(--t-fast);
}
.hw-done-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 22px var(--glow); }
.hw-done-btn.done {
    background: var(--good);
    box-shadow: 0 4px 14px color-mix(in srgb, var(--good) 40%, transparent);
}

.hw-badge {
    padding: 4px 12px;
    border-radius: var(--r-full);
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .5px;
}
.hw-badge.confirmed {
    background: color-mix(in srgb, var(--good) 15%, transparent);
    color: var(--good);
    border: 1px solid color-mix(in srgb, var(--good) 40%, transparent);
}
.hw-badge.pending {
    background: color-mix(in srgb, var(--warn) 15%, transparent);
    color: var(--warn);
    border: 1px solid color-mix(in srgb, var(--warn) 40%, transparent);
}

/* =============================================================
   ЛИДЕРБОРД
============================================================= */
.leaderboard { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 6px; }
.leaderboard li {
    display: grid;
    grid-template-columns: 36px 1fr auto auto;
    gap: 14px;
    align-items: center;
    padding: 12px 16px;
    border-radius: var(--r-md);
    background: var(--card-2);
    border: 1px solid var(--border);
    transition: all var(--t);
}
.leaderboard li:hover { transform: translateX(4px); border-color: var(--border-hi); }
.leaderboard li.me {
    background: var(--grad-accent);
    color: #fff;
    font-weight: 700;
    border-color: transparent;
    box-shadow: 0 10px 30px var(--glow);
}
.leaderboard .pos {
    width: 32px; height: 32px;
    display: grid; place-items: center;
    border-radius: 50%;
    background: var(--bg-2);
    font-weight: 800;
    font-size: 14px;
}
.leaderboard li:nth-child(1) .pos { background: var(--gold); color: #2b1a00; }
.leaderboard li:nth-child(2) .pos { background: #c0c0c0; color: #2b1a00; }
.leaderboard li:nth-child(3) .pos { background: #cd7f32; color: #fff; }
.leaderboard li.me .pos { background: rgba(255,255,255,.25); color: #fff; }
.leaderboard .name { font-weight: 600; }
.leaderboard .lvl { color: var(--muted); font-size: 12px; }
.leaderboard li.me .lvl { color: rgba(255,255,255,.85); }
.leaderboard .xp { font-weight: 800; }

/* =============================================================
   ОЦЕНКИ
============================================================= */
.grades { display: flex; flex-wrap: wrap; gap: 10px; }
.grade {
    width: 76px;
    padding: 12px 8px;
    border-radius: var(--r-md);
    text-align: center;
    animation: pop .35s cubic-bezier(.2,1.2,.3,1) both;
    border: 2px solid;
    transition: transform var(--t);
}
.grade:hover { transform: translateY(-4px) rotate(-3deg); }
.grade-5 { background: color-mix(in srgb, var(--good) 15%, transparent); color: var(--good); border-color: var(--good); }
.grade-4 { background: color-mix(in srgb, var(--accent) 15%, transparent); color: var(--accent); border-color: var(--accent); }
.grade-3 { background: color-mix(in srgb, var(--warn) 15%, transparent); color: var(--warn); border-color: var(--warn); }
.grade-2 { background: color-mix(in srgb, var(--bad) 15%, transparent); color: var(--bad); border-color: var(--bad); }
.g-val { font-size: 26px; font-weight: 900; line-height: 1; }
.g-subj { font-size: 10px; opacity: .85; margin-top: 4px; font-weight: 600; }
.g-date { font-size: 10px; opacity: .6; margin-top: 2px; }

/* =============================================================
   ДОСТИЖЕНИЯ
============================================================= */
.achievements { display: flex; flex-wrap: wrap; gap: 12px; }
.achievement {
    background: var(--card-2);
    border-radius: var(--r-md);
    padding: 14px 18px;
    text-align: center;
    min-width: 104px;
    border: 1px solid var(--border);
    transition: all var(--t);
    position: relative;
    overflow: hidden;
}
.achievement::after {
    content: '';
    position: absolute; inset: 0;
    background: linear-gradient(135deg, transparent, color-mix(in srgb, var(--accent) 25%, transparent));
    opacity: 0;
    transition: opacity var(--t);
}
.achievement:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
    box-shadow: 0 10px 26px var(--glow);
}
.achievement:hover::after { opacity: .3; }
.ach-icon { font-size: 34px; line-height: 1; }
.ach-title { font-size: 11px; color: var(--text-2); margin-top: 6px; font-weight: 600; }

/* =============================================================
   КЛАССЫ (АДМИН)
============================================================= */
.classes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
}
.class-card {
    position: relative;
    border-radius: var(--r-lg);
    padding: 22px;
    background: var(--card-2);
    background-image:
        radial-gradient(circle at top right, color-mix(in srgb, var(--accent) 30%, transparent), transparent 60%),
        var(--grad-card);
    border: 1px solid var(--border);
    transition: all var(--t);
    overflow: hidden;
}
.class-card::before {
    content: '';
    position: absolute; inset: 0;
    background: var(--grad-accent);
    opacity: 0;
    transition: opacity var(--t);
}
.class-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
    box-shadow: 0 16px 40px var(--glow);
}
.class-card:hover::before { opacity: .08; }
.class-link { display: block; position: relative; z-index: 1; color: inherit; }
.class-link:hover { color: inherit; }
.class-name { font-size: 34px; font-weight: 900; line-height: 1; letter-spacing: -.03em; }
.class-count { color: var(--muted); font-size: 13px; margin-top: 8px; }

.class-actions {
    position: absolute; top: 12px; right: 12px;
    display: flex; gap: 4px;
    opacity: 0; transition: opacity var(--t);
    z-index: 2;
}
.class-card:hover .class-actions { opacity: 1; }
.class-actions button {
    width: 32px; height: 32px; padding: 0;
    border: none; border-radius: var(--r-sm);
    background: var(--bg-2); color: var(--text);
    cursor: pointer; font-size: 14px;
    transition: all var(--t-fast);
}
.class-actions button:hover { background: var(--accent); color: #fff; transform: scale(1.1); }

/* =============================================================
   ТАБЛИЦА УЧЕНИКОВ
============================================================= */
.table-wrap { overflow-x: auto; border-radius: var(--r-md); }
.students-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0 6px;
    font-size: 14px;
}
.students-table thead th {
    color: var(--muted);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1px;
    text-align: left;
    padding: 8px 14px;
    font-weight: 700;
}
.students-table tbody tr {
    background: var(--card-2);
    transition: all var(--t-fast);
}
.students-table tbody td {
    padding: 14px;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}
.students-table tbody td:first-child {
    border-left: 1px solid var(--border);
    border-radius: var(--r-md) 0 0 var(--r-md);
}
.students-table tbody td:last-child {
    border-right: 1px solid var(--border);
    border-radius: 0 var(--r-md) var(--r-md) 0;
}
.students-table tbody tr:hover {
    background: var(--card-hi);
    transform: translateX(2px);
}

.avatar {
    display: inline-grid;
    place-items: center;
    width: 42px; height: 42px;
    font-size: 22px;
    background: var(--bg-2);
    border-radius: 50%;
    border: 2px solid var(--border-hi);
    transition: transform var(--t);
}
.students-table tr:hover .avatar { transform: scale(1.15) rotate(-8deg); }

.login-chip {
    background: var(--bg-2);
    padding: 4px 10px;
    border-radius: var(--r-sm);
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    border: 1px solid var(--border);
}

.prefect-badge {
    display: inline-block;
    font-size: 16px;
    margin-left: 4px;
    filter: drop-shadow(0 2px 6px var(--gold));
}

.row-actions {
    display: flex;
    gap: 4px;
    justify-content: flex-end;
}
.row-actions button {
    width: 34px; height: 34px; padding: 0;
    background: transparent;
    border: none;
    border-radius: var(--r-sm);
    font-size: 15px;
    cursor: pointer;
    transition: all var(--t-fast);
}
.row-actions button:hover {
    background: var(--card-hi);
    transform: scale(1.15);
}

/* =============================================================
   МОДАЛКА
============================================================= */
.modal-backdrop {
    position: fixed; inset: 0;
    background: rgba(0, 0, 0, .6);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: grid; place-items: center;
    z-index: 200;
    animation: fade .25s ease;
    padding: 20px;
}
@keyframes fade { from { opacity: 0 } to { opacity: 1 } }

.modal {
    background: var(--card);
    background-image: var(--grad-card);
    border-radius: var(--r-lg);
    padding: 28px;
    width: 100%;
    max-width: 480px;
    border: 1px solid var(--border-hi);
    box-shadow: 0 30px 80px rgba(0,0,0,.55);
    animation: pop .4s cubic-bezier(.2,1.2,.3,1);
    max-height: 90vh;
    overflow-y: auto;
}
@keyframes pop {
    from { transform: scale(.9) translateY(10px); opacity: 0; }
    to   { transform: scale(1) translateY(0); opacity: 1; }
}
.modal h3 { margin-bottom: 18px; font-size: 20px; }
.modal-body { display: flex; flex-direction: column; gap: 12px; }
.modal-body input,
.modal-body select,
.modal-body textarea {
    padding: 13px 16px;
    border-radius: var(--r-md);
    border: 1.5px solid var(--border);
    background: var(--bg-2);
    color: var(--text);
    font-size: 15px;
    font-family: inherit;
    resize: vertical;
    transition: all var(--t);
}
.modal-body input:focus,
.modal-body select:focus,
.modal-body textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 20%, transparent);
    background: var(--card-2);
}
.modal-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    margin-top: 22px;
}

.cred-box {
    background: var(--bg-2);
    padding: 16px;
    border-radius: var(--r-md);
    display: flex;
    flex-direction: column;
    gap: 10px;
    font-size: 15px;
    border: 1px solid var(--border);
}
.cred-box code {
    background: var(--grad-accent);
    color: #fff;
    padding: 3px 10px;
    border-radius: var(--r-sm);
    font-size: 14px;
    font-weight: 700;
    letter-spacing: .5px;
}

/* =============================================================
   МАГАЗИН
============================================================= */
.coins-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(135deg, var(--gold), #ff9800);
    color: #2b1a00;
    padding: 12px 22px;
    border-radius: var(--r-full);
    font-weight: 900;
    font-size: 18px;
    box-shadow: 0 10px 30px color-mix(in srgb, var(--gold) 45%, transparent);
    animation: bob 3s ease-in-out infinite;
}

.tabs {
    display: flex;
    gap: 8px;
    margin: 24px 0;
    flex-wrap: wrap;
    padding: 6px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--r-full);
    width: fit-content;
}
.tabs button {
    padding: 10px 20px;
    border-radius: var(--r-full);
    border: none;
    background: transparent;
    color: var(--text-2);
    font-weight: 600;
    font-size: 14px;
    transition: all var(--t);
}
.tabs button:hover { color: var(--text); transform: translateY(-1px); }
.tabs button.active {
    background: var(--grad-accent);
    color: #fff;
    box-shadow: 0 6px 18px var(--glow);
}

.shop-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
}
.shop-card {
    background: var(--card);
    background-image: var(--grad-card);
    border-radius: var(--r-lg);
    padding: 24px 20px;
    text-align: center;
    border: 1.5px solid var(--border);
    transition: all var(--t);
    position: relative;
    overflow: hidden;
}
.shop-card::before {
    content: '';
    position: absolute;
    top: -50%; left: -50%;
    width: 200%; height: 200%;
    background: radial-gradient(circle, color-mix(in srgb, var(--accent) 30%, transparent), transparent 40%);
    opacity: 0;
    transition: opacity var(--t);
    pointer-events: none;
}
.shop-card:hover {
    transform: translateY(-6px);
    border-color: var(--accent);
    box-shadow: 0 20px 50px var(--glow);
}
.shop-card:hover::before { opacity: .4; }
.shop-card.owned {
    border-color: var(--good);
    background: linear-gradient(145deg, color-mix(in srgb, var(--good) 12%, var(--card)), var(--card));
}
.shop-icon {
    font-size: 64px;
    line-height: 1;
    margin-bottom: 12px;
    filter: drop-shadow(0 8px 20px var(--shadow));
    transition: transform var(--t);
}
.shop-card:hover .shop-icon { transform: scale(1.15) rotate(-6deg); }
.shop-title { font-weight: 700; font-size: 16px; margin-bottom: 6px; }
.shop-foot {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 16px;
    gap: 8px;
}
.price {
    font-weight: 900;
    color: var(--gold);
    font-size: 16px;
}

/* =============================================================
   ИИ
============================================================= */
.ai-card {
    background: linear-gradient(145deg,
        color-mix(in srgb, var(--accent) 18%, var(--card)),
        var(--card));
    border-color: color-mix(in srgb, var(--accent) 40%, transparent);
}
.ai-quick { display: flex; gap: 8px; margin-top: 14px; }
.ai-quick input {
    flex: 1;
    padding: 13px 16px;
    border-radius: var(--r-md);
    border: 1.5px solid var(--border);
    background: var(--bg-2);
    color: var(--text);
    font-size: 15px;
    font-family: inherit;
    transition: all var(--t);
}
.ai-quick input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 20%, transparent);
}
.ai-answer {
    margin-top: 16px;
    padding: 16px 20px;
    border-radius: var(--r-md);
    background: var(--bg-2);
    line-height: 1.6;
    border-left: 3px solid var(--accent);
    animation: fadeUp .4s ease both;
    white-space: pre-wrap;
}

.ai-chat {
    display: flex;
    flex-direction: column;
    height: 72vh;
    padding: 20px;
}
.messages {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 8px 4px;
}
.msg {
    max-width: 78%;
    padding: 13px 18px;
    border-radius: var(--r-lg);
    line-height: 1.55;
    animation: fadeUp .35s ease both;
    white-space: pre-wrap;
    word-wrap: break-word;
}
.msg.bot {
    background: var(--card-2);
    color: var(--text);
    border-bottom-left-radius: 6px;
    align-self: flex-start;
    border: 1px solid var(--border);
}
.msg.user {
    background: var(--grad-accent);
    color: #fff;
    border-bottom-right-radius: 6px;
    align-self: flex-end;
    box-shadow: 0 8px 22px var(--glow);
}
.ai-input {
    display: flex;
    gap: 10px;
    padding-top: 16px;
    margin-top: 12px;
    border-top: 1px solid var(--border);
}
.ai-input input {
    flex: 1;
    padding: 14px 18px;
    border-radius: var(--r-full);
    border: 1.5px solid var(--border);
    background: var(--bg-2);
    color: var(--text);
    font-size: 15px;
    font-family: inherit;
    transition: all var(--t);
}
.ai-input input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 20%, transparent);
}

/* =============================================================
   TOAST
============================================================= */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translate(-50%, 20px) scale(.9);
    background: var(--card);
    color: var(--text);
    padding: 14px 24px;
    border-radius: var(--r-full);
    font-weight: 600;
    font-size: 14px;
    box-shadow: 0 20px 50px rgba(0,0,0,.5);
    border-left: 4px solid var(--accent);
    opacity: 0;
    transition: all var(--t-slow);
    z-index: 300;
    max-width: 90vw;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.toast.show { opacity: 1; transform: translate(-50%, 0) scale(1); }
.toast-error { border-left-color: var(--bad); }

/* =============================================================
   CONFETTI
============================================================= */
.confetti {
    position: fixed;
    top: -20px;
    width: 10px;
    height: 14px;
    z-index: 250;
    pointer-events: none;
    border-radius: 2px;
    animation: fall 2.4s ease-in forwards;
}
@keyframes fall {
    to { transform: translateY(110vh) rotate(720deg); opacity: .2; }
}

/* =============================================================
   LEVEL-UP OVERLAY
============================================================= */
.levelup-overlay {
    position: fixed;
    inset: 0;
    z-index: 400;
    display: grid;
    place-items: center;
    background: radial-gradient(circle at center, rgba(0,0,0,.7), rgba(0,0,0,.96));
    animation: fade .3s ease;
}
.levelup-overlay.fade-out { animation: fadeOut .6s ease forwards; }
@keyframes fadeOut { to { opacity: 0 } }

.levelup-card {
    text-align: center;
    animation: levelPop .9s cubic-bezier(.2,1.5,.4,1);
}
@keyframes levelPop {
    0%   { transform: scale(.3) rotate(-10deg); opacity: 0; }
    60%  { transform: scale(1.15) rotate(3deg); opacity: 1; }
    100% { transform: scale(1) rotate(0); }
}
.levelup-icon {
    font-size: 110px;
    margin-bottom: 12px;
    filter: drop-shadow(0 0 40px var(--accent));
    animation: bob 1.5s ease-in-out infinite;
}
.levelup-title {
    font-size: 22px;
    letter-spacing: 8px;
    color: var(--gold);
    margin-bottom: 10px;
    font-weight: 800;
    text-shadow: 0 0 30px var(--gold);
}
.levelup-level {
    font-size: 140px;
    font-weight: 900;
    line-height: 1;
    color: #fff;
    text-shadow: 0 0 80px var(--accent), 0 0 30px var(--accent);
}
.levelup-status {
    font-size: 26px;
    color: var(--accent);
    margin-top: 14px;
    font-weight: 800;
    letter-spacing: 1px;
}

.cred-box { display: flex; flex-direction: column; gap: 10px; }
.cred-row {
    display: flex; justify-content: space-between; align-items: center;
    gap: 12px; padding: 10px 14px; border-radius: var(--r-md);
    background: var(--bg-2); border: 1px solid var(--border);
}
.cred-label {
    font-size: 12px; color: var(--muted);
    text-transform: uppercase; letter-spacing: .5px; font-weight: 700;
}
.cred-value {
    background: var(--grad-accent); color: #fff;
    padding: 4px 12px; border-radius: var(--r-sm);
    font-family: 'JetBrains Mono', monospace; font-size: 14px; font-weight: 700;
    user-select: all;   /* выделяется двойным кликом целиком */
    cursor: pointer;
}

.field { display: flex; flex-direction: column; gap: 6px; }
.field label {
    font-size: 12px; font-weight: 700; color: var(--text-2);
    text-transform: uppercase; letter-spacing: .5px;
    display: flex; align-items: center; gap: 6px;
}
.field label .muted { text-transform: none; letter-spacing: 0; font-weight: 500; }
.field input, .field select, .field textarea {
    padding: 12px 14px; border-radius: var(--r-md);
    border: 1.5px solid var(--border); background: var(--bg-2);
    color: var(--text); font-size: 15px; font-family: inherit;
    transition: all var(--t);
}
.field input:focus {
    outline: none; border-color: var(--accent);
    box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 20%, transparent);
    background: var(--card-2);
}
/* ========== КРАСИВОЕ ОФОРМЛЕНИЕ MARKDOWN В ЧАТЕ ========== */

.msg {
    line-height: 1.55;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

/* Заголовки внутри сообщения бота */
.msg.bot h1,
.msg.bot h2,
.msg.bot h3,
.msg.bot h4 {
    margin: 12px 0 6px;
    line-height: 1.25;
    color: var(--text);
}
.msg.bot h1 { font-size: 20px; }
.msg.bot h2 { font-size: 17px; }
.msg.bot h3 { font-size: 15px; }
.msg.bot h4 { font-size: 14px; color: var(--text-2); }

/* Параграфы — минимальный отступ */
.msg.bot p { margin: 6px 0; }
.msg.bot p:first-child { margin-top: 0; }
.msg.bot p:last-child { margin-bottom: 0; }

/* Списки */
.msg.bot ul,
.msg.bot ol {
    margin: 8px 0;
    padding-left: 22px;
}
.msg.bot li { margin: 4px 0; }
.msg.bot li > p { margin: 0; }

/* Выделение */
.msg.bot strong { color: var(--accent-3); font-weight: 700; }
.msg.bot em { font-style: italic; color: var(--text-2); }

/* Инлайн-код */
.msg.bot code {
    background: rgba(255, 255, 255, .08);
    color: var(--accent-3);
    padding: 2px 6px;
    border-radius: 6px;
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 13px;
}

/* Блок кода */
.msg.bot pre {
    background: rgba(0, 0, 0, .3);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 12px 14px;
    margin: 10px 0;
    overflow-x: auto;
    font-size: 13px;
    line-height: 1.5;
}
.msg.bot pre code {
    background: transparent;
    padding: 0;
    color: var(--text);
    font-size: inherit;
}

/* Цитаты */
.msg.bot blockquote {
    border-left: 3px solid var(--accent);
    margin: 10px 0;
    padding: 4px 12px;
    background: rgba(255, 255, 255, .03);
    color: var(--text-2);
    border-radius: 0 8px 8px 0;
}

/* Разделитель */
.msg.bot hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 12px 0;
}

/* Ссылки */
.msg.bot a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 2px;
    transition: color .15s;
}
.msg.bot a:hover { color: var(--accent-2); }

/* Таблицы (на случай, если модель выдаст) */
.msg.bot table {
    width: 100%;
    border-collapse: collapse;
    margin: 10px 0;
    font-size: 13px;
}
.msg.bot table th,
.msg.bot table td {
    border: 1px solid var(--border);
    padding: 6px 10px;
    text-align: left;
}
.msg.bot table th {
    background: rgba(255, 255, 255, .05);
    font-weight: 700;
}

/* ========== ЖИВОЙ ИНДИКАТОР ========== */

.msg.loading {
    background: var(--card-2);
    border: 1px solid var(--border);
    padding: 12px 18px;
    min-height: 42px;
    display: flex;
    align-items: center;
}

.typing-indicator {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    color: var(--text-2);
}

/* Три пульсирующие точки */
.typing-dots {
    display: inline-flex;
    gap: 4px;
}
.typing-dots i {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
    display: inline-block;
    animation: pulse 1.2s ease-in-out infinite;
    box-shadow: 0 0 8px var(--glow);
}
.typing-dots i:nth-child(2) { animation-delay: 0.15s; }
.typing-dots i:nth-child(3) { animation-delay: 0.3s; }

@keyframes pulse {
    0%, 60%, 100% {
        opacity: .35;
        transform: scale(1);
    }
    30% {
        opacity: 1;
        transform: scale(1.35);
    }
}

/* Фраза «Думаю…» — плавно меняется */
.typing-phrase {
    transition: opacity .25s ease;
    font-style: italic;
    color: var(--text-2);
    letter-spacing: .2px;
}

/* ========== ЭФФЕКТ НАБОРА ========== */

.msg.bot:not(.loading)::after {
    /* Курсор-мигалка в конце, пока идёт набор.
       Убирается, когда убираем класс .typing */
    content: '';
    display: inline-block;
    width: 2px;
    height: 1em;
    background: var(--accent);
    margin-left: 2px;
    vertical-align: text-bottom;
    animation: blink 0.9s steps(2) infinite;
    border-radius: 1px;
}

@keyframes blink {
    0%, 50%   { opacity: 1; }
    50.01%, 100% { opacity: 0; }
}

/* Убираем курсор, когда набор закончен */
.msg.bot.typed::after {
    display: none;
}
/* ========== PUSH-БАННЕР ========== */
.push-banner {
    position: fixed;
    left: 16px;
    right: 16px;
    bottom: 16px;
    z-index: 150;
    background: var(--card);
    border: 1px solid var(--border-hi);
    border-radius: var(--r-lg);
    padding: 16px 18px;
    display: flex;
    align-items: flex-start;
    gap: 14px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, .5);
    transform: translateY(120%);
    transition: transform .4s cubic-bezier(.2,1,.3,1);
    max-width: 520px;
    margin: 0 auto;
    pointer-events: auto;
}
.push-banner.show { transform: translateY(0); }

.push-banner-icon {
    font-size: 32px;
    flex-shrink: 0;
    filter: drop-shadow(0 4px 12px var(--glow));
}

.push-banner-body { flex: 1; min-width: 0; }
.push-banner-title {
    font-weight: 700;
    font-size: 15px;
    margin-bottom: 4px;
}
.push-banner-text {
    color: var(--text-2);
    font-size: 13px;
    line-height: 1.4;
}

.push-banner-actions {
    display: flex;
    gap: 8px;
    flex-shrink: 0;
    flex-direction: column;
}
.push-banner-primary {
    padding: 8px 14px;
    border-radius: var(--r-full);
    background: var(--grad-accent);
    color: #fff;
    border: none;
    font-weight: 700;
    font-size: 13px;
    cursor: pointer;
    box-shadow: 0 6px 18px var(--glow);
    transition: transform .15s;
}
.push-banner-primary:hover { transform: translateY(-2px); }
.push-banner-later {
    padding: 6px 12px;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-2);
    border-radius: var(--r-full);
    font-size: 12px;
    cursor: pointer;
}
.push-banner-later:hover { background: rgba(255,255,255,.05); }

.push-banner-close {
    position: absolute;
    top: 8px; right: 10px;
    background: transparent;
    border: none;
    color: var(--muted);
    font-size: 20px;
    cursor: pointer;
    line-height: 1;
    padding: 4px 8px;
    border-radius: 8px;
}
.push-banner-close:hover { background: rgba(255,255,255,.08); color: var(--text); }

@media (max-width: 520px) {
    .push-banner {
        flex-wrap: wrap;
        padding: 14px;
    }
    .push-banner-actions {
        width: 100%;
        flex-direction: row;
        justify-content: flex-end;
        margin-top: 8px;
    }
}
/* ========== ЧЕК ПОКУПКИ ========== */
.receipt-modal {
    max-width: 420px;
    padding: 0;
    overflow: hidden;
    border: 2px solid var(--accent);
    background: var(--card);
}

.receipt-header {
    background: var(--grad-accent);
    color: #fff;
    padding: 24px 20px 18px;
    text-align: center;
    position: relative;
}
.receipt-header::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 8px;
    background:
        linear-gradient(-45deg, var(--card) 6px, transparent 0),
        linear-gradient(45deg, var(--card) 6px, transparent 0);
    background-size: 12px 12px;
    background-repeat: repeat-x;
}

.receipt-icon {
    font-size: 56px;
    line-height: 1;
    margin-bottom: 8px;
    filter: drop-shadow(0 6px 20px rgba(0,0,0,.3));
}

.receipt-title {
    font-size: 18px;
    font-weight: 800;
    letter-spacing: 2px;
    margin-bottom: 4px;
}

.receipt-sub {
    font-size: 13px;
    opacity: .9;
}

.receipt-body {
    padding: 20px 20px 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.receipt-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 12px;
    padding: 6px 0;
    border-bottom: 1px dashed var(--border);
    font-size: 14px;
}
.receipt-row:last-child { border-bottom: none; }

.receipt-label {
    color: var(--muted);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: .5px;
    font-weight: 600;
    flex-shrink: 0;
}

.receipt-value {
    font-weight: 600;
    color: var(--text);
    text-align: right;
    word-break: break-word;
}

.receipt-code-row {
    background: color-mix(in srgb, var(--accent) 15%, transparent);
    border-radius: var(--r-md);
    padding: 12px 14px !important;
    border-bottom: none !important;
    margin-bottom: 6px;
    flex-direction: column;
    align-items: center;
}
.receipt-code-row .receipt-label {
    font-size: 11px;
}
.receipt-code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 28px;
    font-weight: 900;
    letter-spacing: 4px;
    color: var(--accent);
    text-shadow: 0 0 20px var(--glow);
}

.receipt-item-row .receipt-value {
    font-size: 16px;
}

.receipt-note {
    background: color-mix(in srgb, var(--warn) 12%, transparent);
    border-left: 3px solid var(--warn);
    padding: 12px 18px;
    font-size: 13px;
    line-height: 1.4;
    color: var(--text-2);
    margin: 0 20px 16px;
    border-radius: var(--r-sm);
}

.receipt-actions {
    display: flex;
    gap: 10px;
    padding: 0 20px 20px;
}
.receipt-actions button {
    flex: 1;
}
.field-hint { font-size: 12px; color: var(--muted); line-height: 1.4; }
.field-group { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 480px) { .field-group { grid-template-columns: 1fr; } }

/* =============================================================
   АНИМАЦИИ / УТИЛИТЫ
============================================================= */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(14px); }
    to   { opacity: 1; transform: translateY(0); }
}
@keyframes pop {
    from { transform: scale(.9); opacity: 0; }
    to   { transform: scale(1); opacity: 1; }
}

.muted { color: var(--muted); }
.small { font-size: 13px; }
.grow { flex: 1; }

/* Адаптив */
@media (max-width: 720px) {
    .container { padding: 18px 14px 60px; }
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        padding: 22px;
    }
    .hero-avatar { margin: 0 auto; width: 80px; height: 80px; font-size: 44px; }
    .hero-info .subtitle { text-align: center; }
    .hero-stats { justify-content: center; }
    .mainnav { padding: 10px 14px; gap: 4px; overflow-x: auto; }
    .mainnav > a:not(.nav-logo) { padding: 8px 10px; font-size: 13px; }
    .user-chip { display: none; }
    .theme-switcher { margin-left: auto; }
    .topbar h1 { font-size: 24px; }
    .login-card { padding: 32px 24px; }
    .rank-big { font-size: 34px; }
    .hw-done-btn { margin-left: 0; width: 100%; text-align: center; justify-content: center; }
    .students-table { font-size: 13px; }
    .students-table tbody td { padding: 10px 8px; }
    .row-actions button { width: 30px; height: 30px; }
}