/*
 * 知序学生端 · 基础运算学习页
 * 以清晰阅读为首要目标，所有可见辅助文字不小于 14px。
 */

body[data-page="display"].math-blue-page {
    --learning-navy: #08284f;
    --learning-navy-deep: #061b36;
    --learning-blue: #176fc1;
    --learning-blue-bright: #3d99e8;
    --learning-blue-soft: #edf6ff;
    --learning-ink: #102c49;
    --learning-muted: #5f748a;
    --learning-line: #d7e4f0;
    --learning-gold: #b98b38;
    min-width: 320px;
    color: var(--learning-ink);
    background:
        radial-gradient(circle at 4% 3%, rgba(47, 132, 216, .11), transparent 24rem),
        radial-gradient(circle at 96% 15%, rgba(117, 188, 235, .10), transparent 26rem),
        linear-gradient(180deg, #f6f9fd 0%, #eef4fa 100%) !important;
    font-size: 16px;
}

body[data-page="display"].math-blue-page .header {
    position: sticky;
    z-index: 100;
    top: 0;
    height: 76px;
    padding: 0 max(24px, calc((100vw - 1480px) / 2 + 30px));
    border-top: 0 !important;
    border-bottom: 1px solid rgba(182, 203, 224, .75) !important;
    background: rgba(255, 255, 255, .94) !important;
    box-shadow: 0 8px 28px rgba(23, 61, 101, .07) !important;
    backdrop-filter: blur(16px);
}

body[data-page="display"].math-blue-page .header h1 {
    position: relative;
    min-height: 48px;
    padding: 4px 0 0 60px;
    color: var(--learning-ink) !important;
    font-size: 19px;
    font-weight: 750;
    line-height: 1.22;
}

body[data-page="display"].math-blue-page .header h1::before {
    content: "知";
    position: absolute;
    top: 0;
    left: 0;
    display: grid;
    width: 46px;
    height: 46px;
    place-items: center;
    border: 1px solid #cfe0f0;
    border-radius: 13px;
    color: #fff;
    background: linear-gradient(145deg, #0a315f, #1975c8);
    box-shadow: 0 7px 18px rgba(20, 91, 158, .18);
    font-family: "Noto Serif SC", "Songti SC", SimSun, serif;
    font-size: 23px;
    font-weight: 700;
}

body[data-page="display"].math-blue-page .header h1::after {
    content: "知序学习中心 · 数学";
    display: block;
    margin-top: 4px;
    color: #6d8297;
    font-size: 14px;
    font-weight: 500;
}

body[data-page="display"].math-blue-page .header .user-info { gap: 12px; }

body[data-page="display"].math-blue-page .header .back-btn,
body[data-page="display"].math-blue-page .header .logout-btn {
    display: inline-flex;
    min-height: 44px;
    align-items: center;
    justify-content: center;
    padding: 0 16px;
    border: 1px solid #cfdeec !important;
    border-radius: 11px !important;
    color: #294966 !important;
    background: #fff !important;
    font-size: 15px;
    font-weight: 650;
    transition: color .2s ease, border-color .2s ease, background .2s ease, transform .2s ease;
}

body[data-page="display"].math-blue-page .header .back-btn::before {
    content: "←";
    margin-right: 7px;
    font-size: 18px;
    line-height: 1;
}

body[data-page="display"].math-blue-page .header .back-btn:hover,
body[data-page="display"].math-blue-page .header .logout-btn:hover {
    color: #0f60a9 !important;
    border-color: #9fc3e5 !important;
    background: #f0f7ff !important;
    transform: translateY(-1px);
}

body[data-page="display"].math-blue-page .container {
    width: 100%;
    max-width: 1480px;
    margin: 0 auto;
    padding: clamp(22px, 2.4vw, 36px);
}

body[data-page="display"].math-blue-page .math-page-shell {
    width: 100%;
    max-width: 1408px;
    margin: 0 auto;
}

body[data-page="display"].math-blue-page .math-hero {
    position: relative;
    min-height: 0;
    margin: 0 0 28px;
    padding: clamp(30px, 3.2vw, 48px);
    isolation: isolate;
    overflow: hidden;
    border: 1px solid rgba(122, 178, 228, .26);
    border-radius: 28px;
    color: #fff;
    background:
        radial-gradient(circle at 72% 4%, rgba(74, 160, 234, .36), transparent 31%),
        radial-gradient(circle at 101% 102%, rgba(205, 167, 91, .17), transparent 28%),
        linear-gradient(124deg, #061a34 0%, #0a3568 52%, #156fbd 100%);
    box-shadow: 0 24px 60px rgba(8, 47, 88, .20);
}

body[data-page="display"].math-blue-page .math-hero::before {
    content: "";
    position: absolute;
    z-index: -1;
    inset: 0;
    width: auto;
    height: auto;
    border: 0;
    border-radius: inherit;
    opacity: .45;
    background-image:
        linear-gradient(rgba(255, 255, 255, .055) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, .055) 1px, transparent 1px);
    background-size: 52px 52px;
    pointer-events: none;
    -webkit-mask-image: linear-gradient(90deg, #000, transparent 88%);
    mask-image: linear-gradient(90deg, #000, transparent 88%);
}

body[data-page="display"].math-blue-page .math-hero::after {
    content: "";
    position: absolute;
    z-index: -1;
    top: auto;
    right: -180px;
    bottom: -310px;
    width: 530px;
    height: 530px;
    border: 1px solid rgba(192, 223, 250, .19);
    border-radius: 50%;
    box-shadow:
        0 0 0 54px rgba(161, 207, 246, .035),
        0 0 0 108px rgba(161, 207, 246, .025);
    pointer-events: none;
}

body[data-page="display"].math-blue-page .math-hero-layout {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: minmax(0, 1.18fr) minmax(390px, .82fr);
    gap: clamp(34px, 5vw, 76px);
    align-items: stretch;
}

body[data-page="display"].math-blue-page .math-hero-content {
    display: flex;
    max-width: none;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    padding: 8px 0;
}

body[data-page="display"].math-blue-page .math-hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin: 0 0 18px;
    color: #b8dbfb;
    font-size: 15px;
    font-weight: 700;
    letter-spacing: .06em;
}

body[data-page="display"].math-blue-page .math-hero-eyebrow::before { display: none; }

body[data-page="display"].math-blue-page .math-hero-eyebrow i {
    display: block;
    width: 28px;
    height: 1px;
    background: rgba(188, 221, 251, .72);
}

body[data-page="display"].math-blue-page .math-hero h1 {
    margin: 0 0 16px;
    color: #fff;
    font-family: "Noto Serif SC", "Songti SC", "Microsoft YaHei", serif;
    font-size: clamp(42px, 4.3vw, 58px);
    font-weight: 750;
    line-height: 1.15;
    letter-spacing: .02em;
    text-shadow: 0 10px 32px rgba(2, 19, 39, .25);
}

body[data-page="display"].math-blue-page .math-hero-description {
    max-width: 670px;
    margin: 0;
    color: rgba(239, 247, 255, .84);
    font-size: 17px;
    line-height: 1.9;
}

body[data-page="display"].math-blue-page .math-learning-values {
    display: flex;
    flex-wrap: wrap;
    gap: 13px 22px;
    margin-top: 22px;
    color: #d3e9fb;
    font-size: 15px;
    font-weight: 600;
}

body[data-page="display"].math-blue-page .math-learning-values span {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

body[data-page="display"].math-blue-page .math-learning-values span::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #78baf0;
    box-shadow: 0 0 0 4px rgba(120, 186, 240, .12);
}

body[data-page="display"].math-blue-page .math-hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 30px;
}

body[data-page="display"].math-blue-page .math-action {
    display: inline-flex;
    min-height: 50px;
    align-items: center;
    justify-content: center;
    gap: 9px;
    padding: 0 21px;
    border: 1px solid rgba(205, 230, 251, .38);
    border-radius: 12px !important;
    color: #fff;
    background: rgba(238, 247, 255, .09);
    box-shadow: none;
    font-size: 16px;
    font-weight: 700;
    text-decoration: none;
    transition: transform .2s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease !important;
}

body[data-page="display"].math-blue-page .math-action svg {
    width: 19px;
    height: 19px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
}

body[data-page="display"].math-blue-page .math-action-primary svg { fill: currentColor; stroke: none; }

body[data-page="display"].math-blue-page .math-action:hover {
    color: #fff;
    border-color: rgba(222, 239, 253, .68);
    background: rgba(177, 216, 248, .19);
    transform: translateY(-2px) !important;
}

body[data-page="display"].math-blue-page .math-action-primary {
    color: #103e6d;
    border-color: #fff;
    background: #fff;
    box-shadow: 0 10px 25px rgba(2, 25, 52, .22);
}

body[data-page="display"].math-blue-page .math-action-primary:hover {
    color: #0c5596;
    border-color: #eff7ff;
    background: #eff7ff;
    box-shadow: 0 14px 30px rgba(2, 25, 52, .25);
}

body[data-page="display"].math-blue-page .math-overview-panel {
    display: flex;
    min-width: 0;
    flex-direction: column;
    justify-content: space-between;
    padding: 25px;
    border: 1px solid rgba(210, 233, 252, .24);
    border-radius: 22px;
    background: linear-gradient(145deg, rgba(255, 255, 255, .15), rgba(255, 255, 255, .07));
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, .11), 0 18px 34px rgba(3, 25, 52, .15);
    backdrop-filter: blur(14px);
}

body[data-page="display"].math-blue-page .math-overview-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    color: #f4f9ff;
    font-size: 16px;
    font-weight: 700;
}

body[data-page="display"].math-blue-page .math-live-badge {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 6px 10px;
    border: 1px solid rgba(205, 231, 251, .20);
    border-radius: 99px;
    color: #c9e5fb;
    background: rgba(6, 35, 70, .22);
    font-size: 14px;
    font-weight: 600;
}

body[data-page="display"].math-blue-page .math-live-badge i {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #71c7ff;
    box-shadow: 0 0 0 4px rgba(113, 199, 255, .13);
}

body[data-page="display"].math-blue-page .math-hero-mark {
    position: static;
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 12px;
    margin: 22px 0 24px;
    color: #fff;
    opacity: 1;
    font-family: Cambria, Georgia, "Times New Roman", serif;
    font-weight: 700;
    line-height: 1;
    text-shadow: 0 13px 34px rgba(2, 20, 43, .33);
}

body[data-page="display"].math-blue-page .math-hero-mark span { font-size: 68px; }

body[data-page="display"].math-blue-page .math-hero-mark small {
    padding: 0;
    color: #a6d5fa;
    font-size: 38px;
    font-weight: 650;
}

body[data-page="display"].math-blue-page .math-hero-mark em {
    color: rgba(255, 255, 255, .88);
    font-size: 38px;
    font-style: normal;
    font-weight: 600;
}

body[data-page="display"].math-blue-page .math-hero-stats {
    position: static;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 9px;
    overflow: visible;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
    backdrop-filter: none;
}

body[data-page="display"].math-blue-page .math-hero-stat {
    min-width: 0;
    padding: 15px 12px;
    border: 1px solid rgba(210, 233, 252, .16);
    border-radius: 13px;
    background: rgba(4, 31, 65, .26);
}

body[data-page="display"].math-blue-page .math-hero-stat strong {
    display: block;
    overflow: hidden;
    color: #fff;
    font-size: clamp(22px, 2vw, 29px);
    font-weight: 750;
    line-height: 1.2;
    text-overflow: ellipsis;
}

body[data-page="display"].math-blue-page .math-hero-stat span {
    display: block;
    margin-top: 6px;
    color: #c7e0f5;
    font-size: 14px;
    line-height: 1.45;
}

body[data-page="display"].math-blue-page .math-board {
    padding: clamp(26px, 3vw, 40px);
    border: 1px solid #d6e3ef;
    border-radius: 26px;
    background: rgba(255, 255, 255, .97);
    box-shadow: 0 18px 50px rgba(26, 67, 110, .08);
}

body[data-page="display"].math-blue-page .math-board-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 32px;
    margin: 0;
}

body[data-page="display"].math-blue-page .math-board-title { max-width: 610px; }

body[data-page="display"].math-blue-page .math-section-kicker {
    display: flex;
    align-items: center;
    gap: 9px;
    margin-bottom: 10px;
    color: #3976ad;
    font-size: 14px;
    font-weight: 750;
    letter-spacing: .06em;
}

body[data-page="display"].math-blue-page .math-section-kicker i {
    width: 24px;
    height: 2px;
    border-radius: 2px;
    background: #2a80ca;
}

body[data-page="display"].math-blue-page .math-board-title h2 {
    margin: 0;
    color: #112f4e;
    font-family: "Noto Serif SC", "Songti SC", "Microsoft YaHei", serif;
    font-size: 28px;
    font-weight: 750;
    line-height: 1.3;
}

body[data-page="display"].math-blue-page .math-board-title p {
    margin: 10px 0 0;
    color: #60768c;
    font-size: 16px;
    line-height: 1.75;
}

body[data-page="display"].math-blue-page .math-board-tools {
    display: grid;
    grid-template-columns: minmax(240px, 1fr) auto auto;
    gap: 10px;
    align-items: center;
}

body[data-page="display"].math-blue-page .math-visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

body[data-page="display"].math-blue-page .math-search-input {
    width: 100%;
    min-height: 50px;
    padding: 11px 15px;
    border: 1px solid #cbdceb !important;
    border-radius: 12px !important;
    color: #173a5b;
    background: #f9fcff;
    box-shadow: inset 0 1px 2px rgba(19, 59, 96, .03);
    font-size: 16px;
}

body[data-page="display"].math-blue-page .math-search-input::placeholder { color: #7d91a5; }

body[data-page="display"].math-blue-page .math-search-input:focus {
    border-color: #2d7fc6 !important;
    outline: none;
    box-shadow: 0 0 0 4px rgba(45, 127, 198, .13) !important;
}

body[data-page="display"].math-blue-page .math-tool-button {
    display: inline-flex;
    min-height: 50px;
    align-items: center;
    justify-content: center;
    gap: 7px;
    padding: 0 17px;
    border: 1px solid #cbdceb;
    border-radius: 12px !important;
    color: #315371;
    background: #fff;
    font-size: 15px;
    font-weight: 700;
    white-space: nowrap;
    cursor: pointer;
    transition: color .2s ease, border-color .2s ease, background .2s ease, box-shadow .2s ease;
}

body[data-page="display"].math-blue-page .math-tool-button svg {
    width: 18px;
    height: 18px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.9;
    stroke-linecap: round;
}

body[data-page="display"].math-blue-page .math-tool-button:hover,
body[data-page="display"].math-blue-page .math-tool-button.is-active {
    color: #145f9f;
    border-color: #9fc3e3;
    background: #edf6ff;
}

body[data-page="display"].math-blue-page .math-search-button {
    color: #fff;
    border-color: #1466ad;
    background: linear-gradient(145deg, #176fba, #0f599c);
    box-shadow: 0 8px 18px rgba(20, 102, 173, .18);
}

body[data-page="display"].math-blue-page .math-search-button:hover {
    color: #fff;
    border-color: #0b4e8b;
    background: linear-gradient(145deg, #1264aa, #0b4e8b);
}

body[data-page="display"].math-blue-page .math-board-legend {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-start;
    gap: 12px 22px;
    margin: 28px 0 24px;
    padding: 16px 0;
    border-top: 1px solid #e3ebf3;
    border-bottom: 1px solid #e3ebf3;
    color: #61778c;
    font-size: 14px;
}

body[data-page="display"].math-blue-page .math-board-legend strong {
    color: #294a68;
    font-size: 14px;
    font-weight: 750;
}

body[data-page="display"].math-blue-page .math-board-legend span {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

body[data-page="display"].math-blue-page .math-board-legend i {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: #aebdcb;
    box-shadow: 0 0 0 4px rgba(174, 189, 203, .13);
}

body[data-page="display"].math-blue-page .math-board-legend .is-learning {
    background: #2478c7;
    box-shadow: 0 0 0 4px rgba(36, 120, 199, .12);
}

body[data-page="display"].math-blue-page .math-board-legend .is-mastered {
    background: var(--learning-gold);
    box-shadow: 0 0 0 4px rgba(185, 139, 56, .13);
}

body[data-page="display"].math-blue-page .math-kp-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
    gap: 18px;
}

body[data-page="display"].math-blue-page .math-kp-card {
    position: relative;
    min-width: 0;
    overflow: hidden;
    border: 1px solid #d9e5f0;
    border-radius: 18px;
    background: #fff;
    box-shadow: 0 5px 18px rgba(24, 65, 105, .055);
    transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease;
}

body[data-page="display"].math-blue-page .math-kp-card::before {
    content: "";
    position: absolute;
    z-index: 1;
    top: 0;
    right: 0;
    left: 0;
    height: 4px;
    background: var(--math-card-accent, #aebdcb);
}

body[data-page="display"].math-blue-page .math-kp-card:hover {
    border-color: color-mix(in srgb, var(--math-card-accent) 55%, #d9e5f0);
    box-shadow: 0 15px 32px rgba(22, 72, 120, .13);
    transform: translateY(-3px);
}

body[data-page="display"].math-blue-page .math-kp-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 20px 20px 0;
}

body[data-page="display"].math-blue-page .math-kp-operation {
    color: #58718a;
    font-size: 14px;
    font-weight: 750;
}

body[data-page="display"].math-blue-page .math-kp-state {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    color: #657b91;
    font-size: 14px;
    font-weight: 600;
    white-space: nowrap;
}

body[data-page="display"].math-blue-page .math-kp-state::before {
    width: 8px;
    height: 8px;
    background: var(--math-card-accent, #aebdcb);
    box-shadow: 0 0 0 4px color-mix(in srgb, var(--math-card-accent) 13%, transparent);
}

body[data-page="display"].math-blue-page .math-kp-name {
    display: block;
    padding: 28px 20px 24px;
    text-align: center;
    text-decoration: none;
    border-radius: 10px;
}

body[data-page="display"].math-blue-page .math-kp-name span {
    display: block;
    margin-bottom: 9px;
    color: #768ca1;
    font-size: 14px;
    font-weight: 600;
}

body[data-page="display"].math-blue-page .math-kp-name strong {
    display: block;
    overflow: hidden;
    color: #0e3154;
    font-family: Cambria, Georgia, "Times New Roman", "Noto Serif SC", serif;
    font-size: 38px;
    font-weight: 700;
    line-height: 1.15;
    text-overflow: ellipsis;
    white-space: nowrap;
    transition: color .2s ease;
}

body[data-page="display"].math-blue-page .math-kp-name:hover strong { color: #1169b3; }

body[data-page="display"].math-blue-page .math-kp-score { padding: 0 20px 22px; }

body[data-page="display"].math-blue-page .math-kp-score-row {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 12px;
}

body[data-page="display"].math-blue-page .math-kp-score-row > span {
    color: #61788e;
    font-size: 15px;
    font-weight: 600;
}

body[data-page="display"].math-blue-page .math-kp-score-row strong {
    color: #173f63;
    font-size: 24px;
    font-weight: 750;
}

body[data-page="display"].math-blue-page .math-kp-score-row small {
    margin-left: 3px;
    color: #71869b;
    font-size: 14px;
    font-weight: 600;
}

body[data-page="display"].math-blue-page .math-kp-track {
    height: 8px;
    margin-top: 10px;
    overflow: hidden;
    border-radius: 99px;
    background: #e8eff6;
}

body[data-page="display"].math-blue-page .math-kp-track span {
    display: block;
    width: var(--math-score, 0%);
    height: 100%;
    border-radius: inherit;
    background: var(--math-card-accent, #aebdcb);
}

body[data-page="display"].math-blue-page .math-kp-footer {
    display: flex;
    min-height: 62px;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 15px 20px;
    border-top: 1px solid #e2ebf3;
    background: #f7faff;
}

body[data-page="display"].math-blue-page .math-kp-count {
    color: #647b91;
    font-size: 14px;
    white-space: nowrap;
}

body[data-page="display"].math-blue-page .math-kp-count strong {
    color: #234968;
    font-size: 16px;
    font-weight: 750;
}

body[data-page="display"].math-blue-page .math-kp-record {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: #1269b3;
    font-size: 14px;
    font-weight: 750;
    text-decoration: none;
    white-space: nowrap;
}

body[data-page="display"].math-blue-page .math-kp-record:hover { color: #084d89; }

body[data-page="display"].math-blue-page .math-kp-record span {
    font-size: 18px;
    transition: transform .2s ease;
}

body[data-page="display"].math-blue-page .math-kp-record:hover span { transform: translateX(3px); }

body[data-page="display"].math-blue-page .math-pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 30px;
    padding-top: 26px;
    border-top: 1px solid #e3ebf3;
}

body[data-page="display"].math-blue-page .math-pagination-summary {
    margin-right: 8px;
    color: #637a90;
    font-size: 15px;
}

body[data-page="display"].math-blue-page .math-pagination-current {
    min-width: 112px;
    color: #294b69;
    font-size: 15px;
    font-weight: 650;
    text-align: center;
}

body[data-page="display"].math-blue-page .math-page-button {
    min-height: 44px;
    padding: 0 16px;
    border: 1px solid #cbdceb;
    border-radius: 11px !important;
    color: #315371;
    background: #fff;
    font-size: 15px;
    font-weight: 650;
    cursor: pointer;
}

body[data-page="display"].math-blue-page .math-page-button:hover:not(:disabled) {
    color: #125f9f;
    border-color: #9fc3e3;
    background: #edf6ff;
}

body[data-page="display"].math-blue-page .math-page-button:disabled {
    color: #94a4b4;
    border-color: #e0e7ee;
    background: #f2f5f8;
    cursor: not-allowed;
}

body[data-page="display"].math-blue-page .loading,
body[data-page="display"].math-blue-page .empty-state,
body[data-page="display"].math-blue-page .error-state { color: #62798f; font-size: 16px; }

body[data-page="display"].math-blue-page .loading-spinner {
    width: 44px;
    height: 44px;
    border-width: 4px;
    border-top-color: #2377c2;
}

@media (max-width: 1120px) {
    body[data-page="display"].math-blue-page .math-hero-layout {
        grid-template-columns: minmax(0, 1fr) minmax(340px, .78fr);
        gap: 32px;
    }

    body[data-page="display"].math-blue-page .math-board-head {
        align-items: flex-start;
        flex-direction: column;
        gap: 22px;
    }

    body[data-page="display"].math-blue-page .math-board-tools {
        width: 100%;
        grid-template-columns: minmax(220px, 1fr) auto auto;
    }
}

@media (max-width: 860px) {
    body[data-page="display"].math-blue-page .math-hero-layout { grid-template-columns: 1fr; }
    body[data-page="display"].math-blue-page .math-hero-content { padding: 0; }
    body[data-page="display"].math-blue-page .math-overview-panel { min-height: 265px; }
}

@media (max-width: 620px) {
    body[data-page="display"].math-blue-page .header {
        height: 68px;
        padding: 0 14px;
    }

    body[data-page="display"].math-blue-page .header h1 {
        min-height: 42px;
        padding: 1px 0 0 50px;
        font-size: 17px;
    }

    body[data-page="display"].math-blue-page .header h1::before {
        width: 41px;
        height: 41px;
        border-radius: 11px;
        font-size: 20px;
    }

    body[data-page="display"].math-blue-page .header h1::after { display: none; }
    body[data-page="display"].math-blue-page .header .user-info { gap: 7px; }

    body[data-page="display"].math-blue-page .header .back-btn,
    body[data-page="display"].math-blue-page .header .logout-btn {
        min-height: 40px;
        padding: 0 10px;
        font-size: 14px;
    }

    body[data-page="display"].math-blue-page .header .back-btn::before { display: none; }

    body[data-page="display"].math-blue-page .container { padding: 16px 14px 24px; }

    body[data-page="display"].math-blue-page .math-hero {
        margin-bottom: 18px;
        padding: 25px 20px 20px;
        border-radius: 21px;
    }

    body[data-page="display"].math-blue-page .math-hero-layout { gap: 26px; }

    body[data-page="display"].math-blue-page .math-hero-eyebrow {
        gap: 8px;
        margin-bottom: 15px;
        font-size: 14px;
    }

    body[data-page="display"].math-blue-page .math-hero-eyebrow i { width: 18px; }

    body[data-page="display"].math-blue-page .math-hero h1 {
        margin-bottom: 13px;
        font-size: 38px;
    }

    body[data-page="display"].math-blue-page .math-hero-description {
        max-width: none;
        font-size: 16px;
        line-height: 1.8;
    }

    body[data-page="display"].math-blue-page .math-learning-values {
        gap: 10px 16px;
        margin-top: 18px;
        font-size: 14px;
    }

    body[data-page="display"].math-blue-page .math-hero-actions {
        display: grid;
        width: 100%;
        grid-template-columns: 1fr;
        gap: 10px;
        margin-top: 24px;
    }

    body[data-page="display"].math-blue-page .math-action {
        width: 100%;
        min-height: 50px;
        padding: 0 14px;
        font-size: 15px;
    }

    body[data-page="display"].math-blue-page .math-overview-panel {
        min-height: 0;
        padding: 19px 15px 15px;
        border-radius: 17px;
    }

    body[data-page="display"].math-blue-page .math-overview-head { font-size: 15px; }
    body[data-page="display"].math-blue-page .math-live-badge { font-size: 14px; }

    body[data-page="display"].math-blue-page .math-hero-mark {
        gap: 8px;
        margin: 19px 0;
    }

    body[data-page="display"].math-blue-page .math-hero-mark span { font-size: 54px; }
    body[data-page="display"].math-blue-page .math-hero-mark small,
    body[data-page="display"].math-blue-page .math-hero-mark em { font-size: 30px; }

    body[data-page="display"].math-blue-page .math-hero-stats { gap: 6px; }

    body[data-page="display"].math-blue-page .math-hero-stat {
        padding: 13px 7px;
        border-radius: 11px;
    }

    body[data-page="display"].math-blue-page .math-hero-stat strong { font-size: 21px; }
    body[data-page="display"].math-blue-page .math-hero-stat span { font-size: 14px; }

    body[data-page="display"].math-blue-page .math-board {
        padding: 23px 18px;
        border-radius: 21px;
    }

    body[data-page="display"].math-blue-page .math-board-title h2 { font-size: 25px; }
    body[data-page="display"].math-blue-page .math-board-title p { font-size: 15px; }

    body[data-page="display"].math-blue-page .math-board-tools {
        grid-template-columns: 1fr 1fr;
        gap: 9px;
    }

    body[data-page="display"].math-blue-page .math-search-input { grid-column: 1 / -1; }
    body[data-page="display"].math-blue-page .math-tool-button { width: 100%; font-size: 15px; }

    body[data-page="display"].math-blue-page .math-board-legend {
        gap: 12px 16px;
        margin: 22px 0 18px;
    }

    body[data-page="display"].math-blue-page .math-board-legend strong { width: 100%; }

    body[data-page="display"].math-blue-page .math-kp-grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    body[data-page="display"].math-blue-page .math-kp-card { border-radius: 16px; }
    body[data-page="display"].math-blue-page .math-kp-top { padding: 18px 18px 0; }
    body[data-page="display"].math-blue-page .math-kp-name { padding: 22px 18px 20px; }
    body[data-page="display"].math-blue-page .math-kp-name strong { font-size: 36px; }
    body[data-page="display"].math-blue-page .math-kp-score { padding: 0 18px 19px; }
    body[data-page="display"].math-blue-page .math-kp-footer { padding: 14px 18px; }

    body[data-page="display"].math-blue-page .math-pagination {
        gap: 9px;
        margin-top: 24px;
        padding-top: 22px;
    }

    body[data-page="display"].math-blue-page .math-pagination-summary {
        width: 100%;
        margin: 0 0 4px;
        text-align: center;
    }

    body[data-page="display"].math-blue-page .math-pagination-current {
        order: -1;
        width: 100%;
    }
}

@media (max-width: 385px) {
    body[data-page="display"].math-blue-page .header h1::before { display: none; }
    body[data-page="display"].math-blue-page .header h1 { padding-left: 0; }
    body[data-page="display"].math-blue-page .header .back-btn,
    body[data-page="display"].math-blue-page .header .logout-btn { padding: 0 8px; }
    body[data-page="display"].math-blue-page .math-learning-values { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
    body[data-page="display"].math-blue-page *,
    body[data-page="display"].math-blue-page *::before,
    body[data-page="display"].math-blue-page *::after {
        scroll-behavior: auto !important;
        transition-duration: .01ms !important;
        animation-duration: .01ms !important;
        animation-iteration-count: 1 !important;
    }
}