:root {
    --bg: #f6f8fb;
    --bg-grad-a: #eef3ff;
    --bg-grad-b: #f9f4ee;
    --text: #1f2430;
    --muted: #5c667a;
    --line: #d8deeb;
    --surface: #ffffff;
    --surface-soft: #f8fafe;
    --primary: #0f6fdc;
    --primary-ink: #ffffff;
}

body.theme-slate {
    --bg: #f7f7f5;
    --bg-grad-a: #f2f2ed;
    --bg-grad-b: #f9f3e7;
    --text: #22252d;
    --muted: #60656f;
    --line: #ddd8cf;
    --surface: #ffffff;
    --surface-soft: #fbf9f5;
    --primary: #9a6a1f;
    --primary-ink: #ffffff;
}

body.theme-graphite {
    --bg: #eef2f3;
    --bg-grad-a: #e4ecef;
    --bg-grad-b: #eef4f3;
    --text: #1c2329;
    --muted: #54616a;
    --line: #cfd8df;
    --surface: #ffffff;
    --surface-soft: #f4f8f9;
    --primary: #00756b;
    --primary-ink: #ffffff;
}

body {
    margin: 0;
    padding: 0;
    color: var(--text);
    font-family: "Trebuchet MS", "Gill Sans", "Noto Sans", sans-serif;
    background:
        radial-gradient(1200px 500px at 0% 0%, var(--bg-grad-a), transparent 60%),
        radial-gradient(900px 500px at 100% 0%, var(--bg-grad-b), transparent 58%),
        var(--bg);
}

.container.my-5 {
    max-width: 1120px;
}

.top-controls {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 0.9rem;
}

.top-controls .nav-tabs {
    margin-bottom: 0;
}

.theme-switch {
    max-width: 260px;
    min-width: 220px;
}

.footer-meta {
    margin-top: 0.75rem;
    text-align: right;
}

.footer-meta a {
    color: var(--muted);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
}

.footer-meta a:hover {
    text-decoration: underline;
}

.card {
    border: 1px solid var(--line);
    border-radius: 18px;
    box-shadow: 0 10px 30px rgba(27, 46, 94, 0.06);
    overflow: hidden;
}

.card-title {
    font-size: clamp(1.4rem, 2.4vw, 1.9rem);
    font-weight: 800;
    letter-spacing: 0.01em;
    margin-bottom: 1.25rem;
}

.nav-tabs {
    border-bottom: 1px solid var(--line);
    gap: 0.4rem;
}

.nav-tabs .nav-link {
    border: 1px solid transparent;
    border-top-left-radius: 12px;
    border-top-right-radius: 12px;
    color: var(--muted);
    font-weight: 700;
}

.nav-tabs .nav-link.active {
    color: var(--text);
    background: var(--surface);
    border-color: var(--line) var(--line) var(--surface);
}

.alert {
    border-radius: 12px;
    border: 1px solid #f1d7a2;
}

.form-label {
    font-weight: 700;
    color: #283047;
    margin-bottom: 0.35rem;
}

.form-control,
.form-select {
    border-radius: 10px;
    border: 1px solid #cfd8ea;
    min-height: 42px;
}

.form-control:focus,
.form-select:focus {
    border-color: #8fb7f0;
    box-shadow: 0 0 0 0.2rem rgba(15, 111, 220, 0.15);
}

.form-check {
    display: flex;
    align-items: center;
    margin-bottom: 0.45rem;
}

.form-check-input {
    margin-right: 0.5rem;
}

.options-card {
    border: 1px solid var(--line);
    border-radius: 12px;
    background: var(--surface-soft);
    padding: 0.75rem;
}

.inputs-card {
    border: 1px solid var(--line);
    border-radius: 12px;
    background: var(--surface-soft);
    padding: 0.75rem;
}

.notice-block {
    margin-top: 0.9rem;
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
}

.notice-block .alert {
    margin-bottom: 0;
    margin-top: auto;
}

.notice-note {
    margin: 0.55rem 0 0;
    color: var(--muted);
    font-size: 0.9rem;
    line-height: 1.35;
}

.options-title {
    font-weight: 700;
    color: #283047;
    margin-bottom: 0.55rem;
}

.options-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.55rem;
}

.option-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: var(--surface);
    padding: 0.5rem 0.65rem;
    min-height: 44px;
}

.option-item .form-check-label {
    margin: 0;
    font-weight: 600;
    cursor: pointer;
}

.option-item .form-check-input {
    margin: 0;
    cursor: pointer;
}

button[type="submit"].btn-primary {
    background-color: var(--primary);
    border-color: var(--primary);
    color: var(--primary-ink);
    border-radius: 10px;
    font-weight: 700;
    padding: 0.68rem 0.9rem;
}

button[type="submit"].btn-primary:hover {
    filter: brightness(0.95);
}

.table {
    margin-bottom: 0;
    border-color: #d8deeb;
}

.table thead th {
    background: linear-gradient(180deg, #f8faff 0%, #f1f5fe 100%);
    color: #2f3a56;
    font-weight: 700;
    border-bottom-width: 1px;
}

.table td,
.table th {
    vertical-align: middle;
}

.table tbody tr:nth-child(odd) td {
    background-color: var(--surface-soft);
}

.tab-pane .card-body.bg-light {
    background: linear-gradient(180deg, #f7f8fc 0%, #f2f5fb 100%) !important;
}

pre.bg-light {
    border: 1px solid #d8deeb;
    border-radius: 10px;
    background: #ffffff !important;
}

@media (min-width: 992px) {
    .form-layout > [class*="col-"] {
        display: flex;
    }

    .form-layout .inputs-card,
    .form-layout .options-card {
        width: 100%;
        height: 100%;
    }

    .form-layout .inputs-card {
        display: flex;
        flex-direction: column;
    }
}

@media (max-width: 768px) {
    .container.mt-3.mb-5 {
        padding-left: 0.85rem;
        padding-right: 0.85rem;
    }

    .top-controls {
        flex-direction: column;
        align-items: stretch;
    }

    .theme-switch {
        max-width: none;
        min-width: 0;
    }

    .footer-meta {
        text-align: left;
    }

    .card {
        border-radius: 14px;
    }

    .card-body {
        padding: 1rem;
    }

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

    .table th,
    .table td {
        white-space: nowrap;
        font-size: 0.92rem;
    }
}

@media (max-width: 576px) {
    .results-table thead {
        display: none;
    }

    .results-table,
    .results-table tbody,
    .results-table tr,
    .results-table td {
        display: block;
        width: 100%;
    }

    .results-table tbody tr {
        border: 1px solid var(--line);
        border-radius: 12px;
        background: var(--surface);
        margin-bottom: 0.75rem;
        overflow: hidden;
    }

    .results-table tbody tr:nth-child(odd) td {
        background: transparent;
    }

    .results-table tbody td {
        padding: 0.5rem 0.75rem;
        border: 0;
        border-bottom: 1px solid var(--line);
        font-size: 0.91rem;
        white-space: normal;
    }

    .results-table tbody td:first-child {
        font-weight: 700;
        color: #283047;
        background: var(--surface-soft);
    }

    .results-table tbody td:last-child {
        border-bottom: 0;
    }

    .results-table tbody td:nth-child(n + 2) {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 0.5rem;
    }

    .results-table tbody td:nth-child(2)::before {
        content: "Yearly";
        color: var(--muted);
        font-weight: 700;
    }

    .results-table tbody td:nth-child(3)::before {
        content: "Monthly";
        color: var(--muted);
        font-weight: 700;
    }

    .results-table tbody td:nth-child(4)::before {
        content: "Weekly";
        color: var(--muted);
        font-weight: 700;
    }

    .results-table tbody td:nth-child(5)::before {
        content: "Hourly";
        color: var(--muted);
        font-weight: 700;
    }

    .results-table tbody td:empty::after {
        content: "-";
        color: var(--muted);
    }
}