/* ============================================================
   班级积分系统 —— 样式表
   设计取向：明亮、圆润、适合小学生的教室大屏与平板触屏操作，
   所有交互元素高度 ≥ 44px，方便手指点击。
   ============================================================ */

:root {
    --bg: #eef3fb;
    --card: #ffffff;
    --text: #1f2a44;
    --muted: #7b879e;
    --border: #e4eaf5;
    --primary: #4f7cff;
    --primary-dark: #3a63e0;
    --primary-soft: #eaf0ff;
    --plus: #1fae6a;
    --plus-soft: #e6f8ef;
    --minus: #f0564a;
    --minus-soft: #feeceb;
    --gold: #ffb020;
    --radius: 16px;
    --shadow: 0 6px 20px rgba(56, 84, 145, .08);
    --shadow-hover: 0 10px 26px rgba(56, 84, 145, .16);
}

* { box-sizing: border-box; }

/* 这些元素在样式里写了 display，必须显式声明 hidden 时隐藏 */
[hidden] { display: none !important; }

html, body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--text);
    font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, "Segoe UI", sans-serif;
    font-size: 15px;
    -webkit-tap-highlight-color: transparent;
}

body { background-image: radial-gradient(circle at 12% 0%, #dfe8ff 0%, transparent 46%), radial-gradient(circle at 92% 4%, #ffe6ef 0%, transparent 40%); background-attachment: fixed; }

h1, h2, h3, p { margin: 0; }
button { font-family: inherit; cursor: pointer; }
input, select, textarea { font-family: inherit; font-size: 15px; }

/* ---------------- 顶部栏 ---------------- */
.topbar {
    position: sticky;
    top: 0;
    z-index: 30;
    display: flex;
    align-items: center;
    gap: 18px;
    padding: 12px 22px;
    background: rgba(255, 255, 255, .92);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
}

.brand { display: flex; align-items: center; gap: 12px; min-width: 210px; }

.logo {
    width: 46px; height: 46px;
    border-radius: 14px;
    background: linear-gradient(135deg, #ffd45e, #ff9f43);
    display: grid; place-items: center;
    font-size: 24px;
    box-shadow: 0 5px 14px rgba(255, 159, 67, .38);
}

.brand-text h1 { font-size: 19px; font-weight: 700; letter-spacing: .4px; }
.brand-text p { font-size: 12px; color: var(--muted); margin-top: 2px; }

.tabs { display: flex; gap: 6px; flex: 1; flex-wrap: wrap; }

.tab {
    border: 1px solid transparent;
    background: #f2f5fc;
    color: #56617a;
    padding: 10px 15px;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 600;
    transition: .16s;
    min-height: 42px;
}
.tab:hover { background: #e9effc; color: var(--primary); }
.tab.active { background: var(--primary); color: #fff; box-shadow: 0 6px 16px rgba(79, 124, 255, .32); }

.topbar-right { display: flex; gap: 8px; }

/* ---------------- 主体 ---------------- */
main { max-width: 1320px; margin: 0 auto; padding: 20px 22px 60px; }

.panel { display: none; animation: fade .22s ease; }
.panel.active { display: block; }
@keyframes fade { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

.card {
    background: var(--card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 18px 20px;
    margin-bottom: 18px;
}

.card-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    flex-wrap: wrap;
    margin-bottom: 14px;
}
.card-head h2 { font-size: 16px; font-weight: 700; display: flex; align-items: center; gap: 8px; }

.step {
    display: inline-grid; place-items: center;
    width: 22px; height: 22px; border-radius: 50%;
    background: var(--primary); color: #fff;
    font-size: 13px; font-weight: 700;
}

.head-actions { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.hint { font-size: 13px; color: var(--muted); }

/* ---------------- 按钮 ---------------- */
.btn {
    border: 1px solid var(--border);
    background: #fff;
    color: var(--text);
    padding: 10px 16px;
    border-radius: 11px;
    font-size: 14px;
    font-weight: 600;
    min-height: 42px;
    transition: .16s;
    white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow); }
.btn:active { transform: none; }
.btn:disabled { opacity: .45; cursor: not-allowed; transform: none; box-shadow: none; }

.btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn.primary:hover { background: var(--primary-dark); }
.btn.danger { background: var(--minus); border-color: var(--minus); color: #fff; }
.btn.ghost { background: #f4f7fd; color: #56617a; }
.btn.small { padding: 7px 12px; font-size: 13px; min-height: 36px; border-radius: 10px; }
.btn.block { width: 100%; }

.icon-btn {
    border: none; background: transparent; font-size: 16px; color: var(--muted);
    width: 34px; height: 34px; border-radius: 9px;
}
.icon-btn:hover { background: #f2f5fc; color: var(--text); }

.row-btns { display: flex; gap: 10px; flex-wrap: wrap; }

/* ---------------- 开关 / 分段控件 ---------------- */
.switch { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; color: #56617a; cursor: pointer; user-select: none; }
.switch input { width: 18px; height: 18px; accent-color: var(--primary); }

.seg { display: inline-flex; background: #f2f5fc; border-radius: 11px; padding: 3px; gap: 2px; }
.seg button {
    border: none; background: transparent; color: #56617a;
    padding: 8px 13px; border-radius: 9px; font-size: 13px; font-weight: 600;
}
.seg button.active { background: #fff; color: var(--primary); box-shadow: 0 2px 8px rgba(56, 84, 145, .14); }

/* ---------------- 统计卡片 ---------------- */
.stat-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 14px;
    margin-bottom: 18px;
}
.stat {
    border-radius: var(--radius);
    padding: 16px 18px;
    color: #fff;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}
.stat .stat-label { font-size: 13px; opacity: .92; }
.stat .stat-value { font-size: 30px; font-weight: 800; line-height: 1.25; letter-spacing: .5px; }
.stat .stat-sub { font-size: 12px; opacity: .88; }
.stat.c1 { background: linear-gradient(135deg, #6d9bff, #4f7cff); }
.stat.c2 { background: linear-gradient(135deg, #43cf8e, #1fae6a); }
.stat.c3 { background: linear-gradient(135deg, #ff9a76, #f0564a); }
.stat.c4 { background: linear-gradient(135deg, #b98cff, #8659f0); }
.stat .stat-emoji { position: absolute; right: 12px; top: 8px; font-size: 34px; opacity: .28; }

/* ---------------- 规则条 ---------------- */
.rule-strip { display: flex; flex-wrap: wrap; gap: 10px; }

.rule-chip {
    display: flex; align-items: center; gap: 8px;
    border: 2px solid var(--border);
    background: #fff;
    border-radius: 14px;
    padding: 10px 14px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
    min-height: 46px;
    transition: .15s;
}
.rule-chip:hover { border-color: #c9d7ff; transform: translateY(-2px); box-shadow: var(--shadow); }
.rule-chip .chip-icon { font-size: 18px; }
.rule-chip .chip-points { font-size: 13px; font-weight: 800; padding: 2px 8px; border-radius: 8px; }
.rule-chip.plus .chip-points { background: var(--plus-soft); color: var(--plus); }
.rule-chip.minus .chip-points { background: var(--minus-soft); color: var(--minus); }
.rule-chip.active { border-color: var(--primary); background: var(--primary-soft); }
.rule-chip.active.plus { border-color: var(--plus); background: var(--plus-soft); }
.rule-chip.active.minus { border-color: var(--minus); background: var(--minus-soft); }
.rule-chip.custom { border-style: dashed; color: var(--primary); }

/* ---------------- 学生卡片 ---------------- */
.student-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(132px, 1fr));
    gap: 12px;
}

.stu-card {
    position: relative;
    border: 2px solid var(--border);
    border-radius: 14px;
    background: #fff;
    padding: 12px 10px 10px;
    text-align: center;
    transition: .15s;
    user-select: none;
    min-height: 108px;
}
.stu-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); border-color: #c9d7ff; }
.stu-card .avatar {
    width: 42px; height: 42px; margin: 0 auto 6px;
    border-radius: 50%;
    display: grid; place-items: center;
    color: #fff; font-size: 17px; font-weight: 700;
}
.stu-card .stu-name { font-size: 14px; font-weight: 700; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.stu-card .stu-meta { font-size: 11px; color: var(--muted); margin-top: 2px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.stu-card .stu-score {
    display: inline-block; margin-top: 6px;
    font-size: 13px; font-weight: 800;
    padding: 2px 10px; border-radius: 9px;
    background: var(--primary-soft); color: var(--primary);
}
.stu-card.selected { border-color: var(--primary); background: var(--primary-soft); }
.stu-card.selected::after {
    content: "✓";
    position: absolute; top: 6px; right: 8px;
    width: 20px; height: 20px; border-radius: 50%;
    background: var(--primary); color: #fff;
    font-size: 12px; display: grid; place-items: center;
}
.stu-card.flash-plus { animation: flashPlus .6s ease; }
.stu-card.flash-minus { animation: flashMinus .6s ease; }
@keyframes flashPlus {
    0% { box-shadow: 0 0 0 0 rgba(31, 174, 106, .55); }
    100% { box-shadow: 0 0 0 18px rgba(31, 174, 106, 0); }
}
@keyframes flashMinus {
    0% { box-shadow: 0 0 0 0 rgba(240, 86, 74, .55); }
    100% { box-shadow: 0 0 0 18px rgba(240, 86, 74, 0); }
}

.empty {
    padding: 34px 16px;
    text-align: center;
    color: var(--muted);
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    font-size: 14px;
    line-height: 1.9;
}

/* ---------------- 走势图 ---------------- */
.trend { display: flex; align-items: flex-end; gap: 10px; height: 168px; padding: 8px 4px 0; }
.trend .bar-col { flex: 1; display: flex; flex-direction: column; justify-content: flex-end; align-items: center; height: 100%; gap: 4px; }
.trend .bar-val { font-size: 12px; font-weight: 700; color: var(--plus); }
.trend .bar {
    width: 100%; max-width: 46px;
    background: linear-gradient(180deg, #6fe0a9, var(--plus));
    border-radius: 9px 9px 4px 4px;
    min-height: 3px;
    transition: height .3s;
}
.trend .bar.zero { background: #e8edf7; }
.trend .bar-label { font-size: 11px; color: var(--muted); }
.trend .bar-minus { font-size: 11px; font-weight: 700; color: var(--minus); }

/* ---------------- 排行榜 ---------------- */
.rank-list { display: flex; flex-direction: column; gap: 10px; }

.rank-item {
    display: flex; align-items: center; gap: 14px;
    padding: 12px 16px;
    border-radius: 14px;
    background: #fafbff;
    border: 1px solid var(--border);
}
.rank-item.top1 { background: linear-gradient(90deg, #fff6dd, #fffdf5); border-color: #ffe0a3; }
.rank-item.top2 { background: linear-gradient(90deg, #f3f6ff, #fbfcff); border-color: #d8e2ff; }
.rank-item.top3 { background: linear-gradient(90deg, #fff1ea, #fffaf7); border-color: #ffd9c6; }

.rank-no {
    width: 34px; height: 34px; border-radius: 50%;
    display: grid; place-items: center;
    background: #eef2fb; color: #56617a;
    font-weight: 800; font-size: 15px; flex: none;
}
.rank-item.top1 .rank-no { background: linear-gradient(135deg, #ffd45e, #ffb020); color: #fff; }
.rank-item.top2 .rank-no { background: linear-gradient(135deg, #c9d6ee, #9fb2d4); color: #fff; }
.rank-item.top3 .rank-no { background: linear-gradient(135deg, #ffc09a, #f0915a); color: #fff; }

.rank-info { flex: 1; min-width: 0; }
.rank-name { font-weight: 700; font-size: 15px; }
.rank-sub { font-size: 12px; color: var(--muted); margin-top: 2px; }
.rank-bar { height: 7px; border-radius: 5px; background: #e8edf7; margin-top: 7px; overflow: hidden; }
.rank-bar > i { display: block; height: 100%; border-radius: 5px; background: linear-gradient(90deg, #8fb0ff, var(--primary)); }
.rank-points { font-size: 20px; font-weight: 800; color: var(--primary); flex: none; }
.rank-points.neg { color: var(--minus); }

/* ---------------- 表格 ---------------- */
.table-wrap { overflow-x: auto; border-radius: 12px; }
.table { width: 100%; border-collapse: collapse; font-size: 14px; }
.table th, .table td { padding: 11px 12px; text-align: left; border-bottom: 1px solid var(--border); white-space: nowrap; }
.table th { background: #f7f9ff; color: #56617a; font-size: 13px; font-weight: 700; position: sticky; top: 0; }
.table tbody tr:hover { background: #fafbff; }
.table tr.revoked { color: #b6bfd2; text-decoration: line-through; }
.table .pts { font-weight: 800; }
.table .pts.plus { color: var(--plus); }
.table .pts.minus { color: var(--minus); }
.table .op { display: flex; gap: 8px; }

.tag { display: inline-block; padding: 2px 9px; border-radius: 8px; font-size: 12px; background: #f2f5fc; color: #56617a; }
.tag.plus { background: var(--plus-soft); color: var(--plus); }
.tag.minus { background: var(--minus-soft); color: var(--minus); }

/* ---------------- 筛选 / 分页 ---------------- */
.filters { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 14px; }
.filters-sep { color: var(--muted); font-size: 13px; }
input[type="text"], input[type="password"], input[type="number"], input[type="date"], select, textarea {
    border: 1px solid var(--border);
    background: #fff;
    border-radius: 11px;
    padding: 9px 12px;
    color: var(--text);
    min-height: 40px;
    outline: none;
    transition: .15s;
}
input:focus, select:focus, textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(79, 124, 255, .14); }
.filters input[type="text"] { min-width: 200px; }

.pager { display: flex; align-items: center; gap: 12px; justify-content: center; margin-top: 14px; font-size: 13px; color: var(--muted); }

/* ---------------- 奖励 ---------------- */
.reward-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: 14px; }
.reward-card {
    border: 2px solid var(--border);
    border-radius: 15px;
    padding: 16px;
    text-align: center;
    background: #fff;
    transition: .15s;
}
.reward-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); border-color: #ffd9c6; }
.reward-card .r-icon { font-size: 34px; }
.reward-card .r-name { font-weight: 700; margin: 6px 0 2px; }
.reward-card .r-cost { font-size: 13px; color: var(--gold); font-weight: 800; }
.reward-card .r-stock { font-size: 12px; color: var(--muted); margin-top: 4px; }
.reward-card .r-actions { display: flex; gap: 8px; justify-content: center; margin-top: 12px; flex-wrap: wrap; }
.reward-card.sold-out { opacity: .6; }

/* ---------------- 规则管理 ---------------- */
.rule-cols, .settings-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.settings-cols { grid-template-columns: 1fr 1fr; }
.rule-list { display: flex; flex-direction: column; gap: 8px; }
.rule-row {
    display: flex; align-items: center; gap: 10px;
    padding: 10px 14px; border-radius: 12px; background: #fafbff; border: 1px solid var(--border);
}
.rule-row .r-icon { font-size: 18px; }
.rule-row .r-name { flex: 1; font-weight: 600; }
.rule-row .r-pts { font-weight: 800; font-size: 14px; }
.rule-row .r-pts.plus { color: var(--plus); }
.rule-row .r-pts.minus { color: var(--minus); }

/* ---------------- 表单 ---------------- */
.form { display: flex; flex-direction: column; gap: 12px; }
.form label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: #56617a; font-weight: 600; }
.form input, .form select { width: 100%; }
.form .btn { align-self: flex-start; }
.danger-zone { border: 2px solid #ffdcd8; }
.danger-zone h2 { color: var(--minus); }

/* ---------------- 遮罩 / 弹窗 ---------------- */
.mask { position: fixed; inset: 0; background: rgba(24, 34, 58, .42); z-index: 60; }

.modal {
    position: fixed; z-index: 61;
    top: 50%; left: 50%; transform: translate(-50%, -50%);
    width: min(520px, 92vw);
    max-height: 88vh;
    background: #fff;
    border-radius: 18px;
    box-shadow: 0 24px 60px rgba(24, 34, 58, .3);
    display: flex; flex-direction: column;
    overflow: hidden;
}
.modal-head { display: flex; align-items: center; justify-content: space-between; padding: 16px 18px; border-bottom: 1px solid var(--border); }
.modal-head h3 { font-size: 16px; }
.modal-body { padding: 18px; overflow-y: auto; display: flex; flex-direction: column; gap: 12px; }
.modal-foot { padding: 14px 18px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 10px; }
.modal-body label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: #56617a; font-weight: 600; }
.modal-body input, .modal-body select, .modal-body textarea { width: 100%; }
.modal-body textarea { min-height: 150px; resize: vertical; line-height: 1.6; }

.stu-pick { display: flex; flex-wrap: wrap; gap: 8px; max-height: 240px; overflow-y: auto; }
.stu-pick button {
    border: 1px solid var(--border); background: #fff; border-radius: 10px;
    padding: 8px 12px; font-size: 13px; font-weight: 600;
}
.stu-pick button.active { background: var(--primary); border-color: var(--primary); color: #fff; }

/* ---------------- 登录 ---------------- */
.login-mask {
    position: fixed; inset: 0; z-index: 80;
    display: grid; place-items: center;
    background: linear-gradient(135deg, #dfe8ff, #f8eaff 60%, #ffe6ef);
}
.login-box {
    width: min(380px, 90vw);
    background: #fff; border-radius: 22px; padding: 30px 26px;
    box-shadow: 0 20px 50px rgba(56, 84, 145, .22);
    text-align: center;
}
.login-logo {
    width: 62px; height: 62px; margin: 0 auto 12px;
    border-radius: 20px; display: grid; place-items: center; font-size: 32px;
    background: linear-gradient(135deg, #ffd45e, #ff9f43);
    box-shadow: 0 8px 20px rgba(255, 159, 67, .4);
}
.login-box h2 { font-size: 19px; margin-bottom: 6px; }
.login-box .muted { font-size: 13px; color: var(--muted); margin-bottom: 16px; }
.login-box input { width: 100%; margin-bottom: 12px; text-align: center; letter-spacing: 2px; }
.login-box .err { color: var(--minus); font-size: 13px; min-height: 18px; margin-top: 10px; }

/* ---------------- 提示 ---------------- */
.toast-wrap { position: fixed; top: 18px; left: 50%; transform: translateX(-50%); z-index: 90; display: flex; flex-direction: column; gap: 8px; align-items: center; pointer-events: none; }
.toast {
    background: #223055; color: #fff;
    padding: 11px 20px; border-radius: 12px;
    font-size: 14px; font-weight: 600;
    box-shadow: 0 10px 28px rgba(24, 34, 58, .28);
    animation: toastIn .2s ease;
    max-width: 80vw;
}
.toast.ok { background: linear-gradient(135deg, #2fc07a, #1fae6a); }
.toast.err { background: linear-gradient(135deg, #f4655a, #e0433a); }
@keyframes toastIn { from { opacity: 0; transform: translateY(-10px); } to { opacity: 1; transform: none; } }

/* ---------------- 大屏 ---------------- */
.bigscreen {
    position: fixed; inset: 0; z-index: 70;
    background: linear-gradient(160deg, #101a35, #1c2a52 60%, #25335e);
    color: #fff;
    padding: 26px 40px;
    display: flex; flex-direction: column;
}
.bs-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; }
.bs-head h1 { font-size: 30px; letter-spacing: 2px; }
.bs-right { display: flex; align-items: center; gap: 14px; font-size: 14px; opacity: .85; }
.bs-list { flex: 1; display: flex; flex-direction: column; gap: 12px; overflow: hidden; }
.bs-item { display: flex; align-items: center; gap: 20px; background: rgba(255, 255, 255, .07); border-radius: 16px; padding: 14px 24px; }
.bs-item.top1 { background: linear-gradient(90deg, rgba(255, 200, 60, .28), rgba(255, 255, 255, .06)); }
.bs-item.top2 { background: linear-gradient(90deg, rgba(180, 200, 240, .22), rgba(255, 255, 255, .06)); }
.bs-item.top3 { background: linear-gradient(90deg, rgba(255, 150, 90, .22), rgba(255, 255, 255, .06)); }
.bs-no { width: 46px; font-size: 26px; font-weight: 800; text-align: center; opacity: .9; }
.bs-name { flex: 1; font-size: 26px; font-weight: 700; }
.bs-sub { font-size: 15px; opacity: .7; margin-left: 12px; font-weight: 400; }
.bs-points { font-size: 32px; font-weight: 800; color: #ffd45e; }
.bs-foot { text-align: center; opacity: .6; font-size: 13px; margin-top: 14px; }

/* ---------------- 小屏适配 ---------------- */
@media (max-width: 900px) {
    .rule-cols, .settings-cols { grid-template-columns: 1fr; }
    main { padding: 14px 12px 50px; }
    .brand { min-width: auto; }
    .tabs { order: 3; width: 100%; }
    .student-grid { grid-template-columns: repeat(auto-fill, minmax(112px, 1fr)); }
}