:root {
    --bg: #f4f6fb;
    --panel: #ffffff;
    --text: #19213a;
    --muted: #64708f;
    --line: #d8deed;
    --primary: #263784;
    --primary-dark: #18245f;
    --accent: #cf1238;
    --accent-soft: #fde8ed;
    --warning: #a86612;
    --error: #b42332;
    --success: #067647;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: linear-gradient(180deg, rgba(255,255,255,0.8), rgba(244,246,251,0.96)), var(--bg);
    color: var(--text);
    font-family: Arial, "Microsoft YaHei", "PingFang SC", sans-serif;
    display: grid;
    grid-template-columns: 286px 1fr;
    min-height: 100vh;
}

a,
button,
input,
select,
textarea {
    touch-action: manipulation;
}

.sidebar {
    background: linear-gradient(180deg, #263784, #121b4d);
    color: white;
    padding: 18px 16px 24px;
    border-right: 4px solid var(--accent);
}

.brand {
    display: grid;
    gap: 12px;
    margin-bottom: 24px;
    padding: 10px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.1);
}

.brand-logo {
    display: block;
    width: 100%;
    height: auto;
    max-height: 78px;
    object-fit: contain;
    border-radius: 6px;
    background: white;
    padding: 8px;
}

.brand small {
    display: block;
    color: #d9def4;
    margin-top: 3px;
}

.brand strong {
    font-size: 18px;
}

nav {
    display: grid;
    gap: 6px;
}

nav a {
    color: #f6f7ff;
    text-decoration: none;
    padding: 10px 12px;
    border-radius: 6px;
    border-left: 3px solid transparent;
}

nav a:hover {
    background: rgba(255, 255, 255, 0.11);
    border-left-color: var(--accent);
}

.main {
    padding: 30px;
    overflow-x: auto;
    min-width: 0;
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    margin-bottom: 22px;
}

h1, h2, p {
    margin-top: 0;
}

h1 {
    margin-bottom: 4px;
    font-size: 32px;
    color: var(--primary-dark);
}

h2 {
    font-size: 20px;
    color: var(--primary-dark);
}

p {
    color: var(--muted);
}

.button {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    min-height: 40px;
    padding: 0 14px;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: white;
    color: var(--primary);
    text-decoration: none;
    font-weight: 700;
    cursor: pointer;
}

.button.primary {
    background: linear-gradient(180deg, #2d43a1, var(--primary));
    border-color: var(--primary);
    color: white;
    box-shadow: 0 8px 18px rgba(38, 55, 132, 0.18);
}

.button.primary:hover {
    background: var(--primary-dark);
}

.button.danger {
    border-color: #f5b5c0;
    color: var(--error);
}

.row-actions {
    display: flex;
    gap: 10px;
    align-items: center;
    white-space: nowrap;
}

.row-actions form {
    margin: 0;
}

.link-button {
    padding: 0;
    border: 0;
    background: transparent;
    color: var(--primary);
    font: inherit;
    font-weight: 700;
    text-decoration: none;
    cursor: pointer;
}

.link-button.danger {
    color: var(--error);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(150px, 1fr));
    gap: 14px;
    margin-bottom: 24px;
}

.stats-grid article,
.scan-panel {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 18px;
    box-shadow: 0 10px 24px rgba(31, 45, 105, 0.06);
}

.stats-grid strong {
    display: block;
    font-size: 32px;
    margin-bottom: 6px;
    color: var(--primary);
}

.stats-grid span {
    color: var(--muted);
}

.split {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: 22px;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border: 1px solid var(--line);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 10px 24px rgba(31, 45, 105, 0.05);
    min-width: 680px;
}

th, td {
    text-align: left;
    padding: 12px;
    border-bottom: 1px solid var(--line);
    vertical-align: top;
}

th {
    background: #eef1fb;
    font-size: 13px;
    color: var(--primary-dark);
}

tbody tr:hover {
    background: #fbfcff;
}

tr:last-child td {
    border-bottom: 0;
}

.toolbar,
.scan-form,
.form-grid {
    display: grid;
    gap: 14px;
    margin-bottom: 20px;
}

.toolbar {
    grid-template-columns: 1fr 180px auto;
    align-items: end;
}

.scan-form {
    grid-template-columns: 1fr 260px 180px auto;
    align-items: end;
}

.form-grid {
    grid-template-columns: repeat(2, minmax(220px, 1fr));
    max-width: 900px;
}

.wide {
    grid-column: 1 / -1;
}

label {
    display: grid;
    gap: 6px;
    color: var(--primary-dark);
    font-weight: 700;
}

input, select, textarea {
    min-height: 44px;
    border: 1px solid #c9d1e6;
    border-radius: 6px;
    padding: 9px 10px;
    font: inherit;
    background: white;
    color: var(--text);
}

input:focus,
select:focus,
textarea:focus {
    outline: 3px solid rgba(207, 18, 56, 0.14);
    border-color: var(--accent);
}

textarea {
    min-height: 110px;
    resize: vertical;
}

.check {
    display: flex;
    align-items: center;
    gap: 8px;
}

.check input {
    min-height: auto;
}

.actions {
    display: flex;
    gap: 10px;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    margin: 26px 0 12px;
}

.section-header h2 {
    margin-bottom: 4px;
}

.calendar-nav {
    display: flex;
    gap: 8px;
}

.calendar-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    align-items: center;
    margin-bottom: 14px;
    color: var(--muted);
}

.calendar-legend span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.legend-box {
    width: 16px;
    height: 16px;
    border-radius: 4px;
    border: 1px solid var(--line);
}

.legend-box.sunday {
    background: #e5e7eb;
}

.legend-box.attended {
    background: #16a34a;
    border-color: #16a34a;
}

.year-calendar {
    display: grid;
    grid-template-columns: repeat(3, minmax(260px, 1fr));
    gap: 16px;
}

.month-calendar {
    background: white;
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 14px;
}

.month-calendar h3 {
    margin: 0 0 10px;
    font-size: 18px;
    color: var(--primary);
}

.weekday-row,
.day-grid {
    display: grid;
    grid-template-columns: repeat(7, minmax(0, 1fr));
    gap: 5px;
}

.weekday-row {
    margin-bottom: 6px;
    color: var(--muted);
    font-size: 12px;
    text-align: center;
}

.calendar-day {
    min-height: 44px;
    border: 1px solid #e4e7ec;
    border-radius: 6px;
    padding: 5px;
    background: #fff;
    display: grid;
    align-content: space-between;
}

.calendar-day.outside {
    opacity: 0.28;
}

.calendar-day.sunday {
    background: #e5e7eb;
}

.calendar-day.attended {
    background: #138a55;
    border-color: #087443;
    color: white;
}

.day-number {
    font-weight: 700;
    font-size: 13px;
}

.day-time {
    font-size: 11px;
    font-weight: 700;
    line-height: 1;
}

.flash-wrap {
    display: grid;
    gap: 8px;
    margin-bottom: 18px;
}

.flash {
    padding: 11px 13px;
    border-radius: 6px;
    border: 1px solid var(--line);
    background: white;
    border-left: 4px solid var(--primary);
}

.flash.success {
    border-color: #9ad5bd;
    border-left-color: var(--success);
    color: var(--success);
}

.flash.warning {
    border-color: #f1cf8a;
    border-left-color: var(--warning);
    color: var(--warning);
}

.flash.error {
    border-color: #f2a7a2;
    border-left-color: var(--error);
    color: var(--error);
}

@media (max-width: 1180px) {
    body {
        grid-template-columns: 236px 1fr;
    }

    .sidebar {
        padding: 16px 12px 20px;
    }

    .brand {
        padding: 8px;
    }

    .brand-logo {
        max-height: 66px;
    }

    .brand strong {
        font-size: 16px;
    }

    .main {
        padding: 24px;
    }

    .stats-grid {
        grid-template-columns: repeat(2, minmax(180px, 1fr));
    }

    .split {
        grid-template-columns: 1fr;
    }

    .year-calendar {
        grid-template-columns: repeat(2, minmax(270px, 1fr));
    }

    .toolbar {
        grid-template-columns: 1fr 160px auto;
    }

    .scan-form {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 900px) {
    body {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: static;
        border-right: 0;
        border-bottom: 4px solid var(--accent);
        padding: 14px;
    }

    nav {
        grid-template-columns: repeat(4, minmax(0, 1fr));
        gap: 8px;
    }

    nav a {
        display: flex;
        align-items: center;
        justify-content: center;
        min-height: 44px;
        padding: 8px 6px;
        border-left: 0;
        border-bottom: 3px solid transparent;
        text-align: center;
        font-size: 14px;
    }

    nav a:hover {
        border-left-color: transparent;
        border-bottom-color: var(--accent);
    }

    .brand {
        grid-template-columns: 180px 1fr;
        align-items: center;
        margin-bottom: 12px;
    }

    .brand-logo {
        max-height: 58px;
    }

    .page-header,
    .split {
        display: block;
    }

    .stats-grid,
    .toolbar,
    .scan-form,
    .form-grid,
    .year-calendar {
        grid-template-columns: 1fr;
    }

    .section-header {
        display: block;
    }

    .calendar-nav {
        margin-top: 10px;
    }

    table {
        display: block;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
}

@media (max-width: 640px) {
    body {
        display: block;
    }

    .sidebar {
        padding: 10px;
    }

    .brand {
        grid-template-columns: 118px 1fr;
        gap: 10px;
    }

    .brand-logo {
        max-height: 44px;
        padding: 5px;
    }

    .brand strong {
        font-size: 15px;
        line-height: 1.25;
    }

    .brand small {
        font-size: 12px;
    }

    nav {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .main {
        padding: 16px;
    }

    .page-header {
        margin-bottom: 16px;
    }

    .page-header .button {
        width: 100%;
        margin-top: 12px;
    }

    h1 {
        font-size: 26px;
    }

    h2 {
        font-size: 18px;
    }

    p {
        line-height: 1.45;
    }

    .stats-grid {
        gap: 10px;
        margin-bottom: 18px;
    }

    .stats-grid article,
    .scan-panel,
    .month-calendar {
        padding: 14px;
    }

    .stats-grid strong {
        font-size: 28px;
    }

    .button {
        width: 100%;
        min-height: 46px;
    }

    .actions,
    .calendar-nav,
    .row-actions {
        flex-wrap: wrap;
    }

    .actions .button,
    .calendar-nav .button {
        width: auto;
        flex: 1 1 120px;
    }

    .row-actions {
        gap: 8px;
    }

    .toolbar,
    .scan-form,
    .form-grid {
        gap: 12px;
    }

    input,
    select,
    textarea {
        width: 100%;
        font-size: 16px;
    }

    table {
        min-width: 620px;
        font-size: 14px;
    }

    th,
    td {
        padding: 10px;
    }

    .year-calendar {
        gap: 12px;
    }

    .weekday-row,
    .day-grid {
        gap: 4px;
    }

    .calendar-day {
        min-height: 40px;
        padding: 4px;
    }

    .day-number {
        font-size: 12px;
    }

    .day-time {
        font-size: 10px;
    }
}