:root {
    --bg: #f6efe5;
    --panel: #fffdf8;
    --panel-border: #eadcca;
    --text: #2f241d;
    --muted: #776456;
    --primary: #b85c38;
    --primary-dark: #8f4529;
    --success: #2f7d4c;
    --success-soft: #e3f4e8;
    --warning: #a35d1c;
    --warning-soft: #fff0df;
    --shadow: 0 18px 45px rgba(104, 67, 35, 0.12);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(180deg, #f3eadf 0%, #f8f4ec 30%, #fcfbf8 100%);
    color: var(--text);
}

.page {
    width: min(1120px, calc(100% - 32px));
    margin: 0 auto;
    padding: 32px 0 48px;
}

.hero {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    align-items: flex-start;
    background: radial-gradient(circle at top left, #fff6ec 0%, #fffdf8 55%, #f9f0e5 100%);
    border: 1px solid var(--panel-border);
    border-radius: 28px;
    padding: 28px;
    box-shadow: var(--shadow);
}

.eyebrow {
    margin: 0 0 8px;
    font-size: 0.82rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--primary);
    font-weight: 700;
}

.hero h1,
.section-heading h2,
.empty-state h2 {
    margin: 0;
}

.hero-text {
    margin: 12px 0 0;
    max-width: 680px;
    color: var(--muted);
    line-height: 1.6;
}

.stats {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
    margin: 24px 0;
}

.stat-card,
.panel {
    background: var(--panel);
    border: 1px solid var(--panel-border);
    border-radius: 24px;
    box-shadow: var(--shadow);
}

.stat-card {
    padding: 20px 24px;
}

.stat-card span {
    display: block;
    color: var(--muted);
    margin-bottom: 10px;
}

.stat-card strong {
    font-size: 2rem;
}

.stat-card.success {
    background: linear-gradient(135deg, #f7fff9 0%, var(--success-soft) 100%);
}

.stat-card.warning {
    background: linear-gradient(135deg, #fff9f2 0%, var(--warning-soft) 100%);
}

.toolbar {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(220px, 1fr) auto;
    gap: 16px;
    align-items: end;
    padding: 24px;
}

.field {
    display: grid;
    gap: 8px;
}

.field span {
    font-weight: 600;
}

input[type="search"],
select,
.note-input {
    width: 100%;
    border: 1px solid #d8c6b4;
    border-radius: 16px;
    padding: 14px 16px;
    font-size: 1rem;
    color: var(--text);
    background: #fff;
}

input[type="search"]:focus,
select:focus,
.note-input:focus {
    outline: 2px solid rgba(184, 92, 56, 0.2);
    border-color: var(--primary);
}

.toolbar-actions {
    display: flex;
    gap: 12px;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: none;
    border-radius: 16px;
    padding: 14px 20px;
    font-size: 0.98rem;
    font-weight: 700;
    text-decoration: none;
    cursor: pointer;
    background: var(--primary);
    color: #fff;
    transition: transform 0.15s ease, background 0.15s ease;
}

.button:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

.button-secondary {
    background: #fff;
    color: var(--primary);
    border: 1px solid var(--panel-border);
}

.button-ghost {
    background: #f8efe4;
    color: var(--text);
}

.button-small {
    padding: 10px 14px;
    font-size: 0.9rem;
    border-radius: 12px;
}

.class-section {
    margin-top: 24px;
}

.section-heading {
    padding: 24px 24px 0;
}

.table-wrap {
    overflow-x: auto;
    padding: 20px 24px 24px;
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead th {
    text-align: left;
    font-size: 0.9rem;
    color: var(--muted);
    padding-bottom: 14px;
    border-bottom: 1px solid #efdfd0;
}

tbody td {
    padding: 16px 0;
    border-bottom: 1px solid #f3e8dc;
    vertical-align: middle;
}

.status-badge {
    display: inline-flex;
    align-items: center;
    padding: 9px 14px;
    border-radius: 999px;
    font-weight: 700;
    font-size: 0.9rem;
}

.status-badge.paid {
    color: var(--success);
    background: var(--success-soft);
}

.status-badge.unpaid {
    color: var(--warning);
    background: var(--warning-soft);
}

.status-badge.partial {
    color: #8b5a18;
    background: #ffe8bf;
}

.checkbox-wrap {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
}

.payment-checkbox {
    width: 20px;
    height: 20px;
    accent-color: var(--primary);
}

.note-form {
    display: grid;
    gap: 10px;
    min-width: 220px;
}

.note-input {
    min-height: 74px;
    resize: vertical;
    font-family: inherit;
}

.empty-state {
    margin-top: 24px;
    padding: 28px;
    text-align: center;
}

.toast {
    position: fixed;
    right: 20px;
    bottom: 20px;
    background: #2b241f;
    color: #fff;
    padding: 14px 18px;
    border-radius: 14px;
    opacity: 0;
    pointer-events: none;
    transform: translateY(10px);
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.toast.show {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 860px) {
    .hero,
    .toolbar {
        grid-template-columns: 1fr;
        display: grid;
    }

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

    .toolbar-actions {
        width: 100%;
    }

    .button,
    .button-secondary,
    .button-ghost {
        width: 100%;
    }

    .page {
        width: min(100% - 20px, 1120px);
        padding-top: 20px;
    }

    .hero,
    .panel,
    .stat-card {
        border-radius: 20px;
    }

    .table-wrap {
        padding: 16px;
    }

    table,
    thead,
    tbody,
    tr,
    th,
    td {
        display: block;
        width: 100%;
    }

    thead {
        display: none;
    }

    tbody tr {
        border: 1px solid #efdfd0;
        border-radius: 18px;
        padding: 14px;
        margin-bottom: 14px;
        background: #fffdfa;
    }

    tbody td {
        border-bottom: none;
        padding: 8px 0;
    }

    tbody td::before {
        content: attr(data-label);
        display: block;
        margin-bottom: 6px;
        color: var(--muted);
        font-size: 0.84rem;
        font-weight: 700;
        text-transform: uppercase;
        letter-spacing: 0.04em;
    }

    .checkbox-wrap {
        align-items: flex-start;
    }

    .note-form,
    .button-small {
        width: 100%;
    }
}