:root {
    --bg: #f5f7fa;
    --surface: #ffffff;
    --text: #1f2937;
    --muted: #667085;
    --line: #e5e7eb;
    --primary: #2457a7;
    --primary-hover: #1d4789;
    --primary-soft: #f2f6fc;
    --danger: #b42318;
    --danger-hover: #8f1c13;
    --danger-bg: #fff4f2;
    --warning: #6f5310;
    --warning-bg: #fff9e8;
    --focus: #7aa7ff;
    --control-height: 48px;
    --control-radius: 10px;
}

body {
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
}

h1 {
    margin: 0;
    color: #24364b;
    font-size: clamp(24px, 4vw, 32px);
}

.page-main {
    width: 100%;
}

.page-heading {
    width: min(100% - 40px, var(--global-max-width));
    margin: 30px auto 0;
    padding: 2px 2px 0;
}

.page-heading h1 {
    margin: 0;
}

.page-heading p {
    margin: 7px 0 0;
    color: var(--muted);
    font-size: 14px;
}

.calculator-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    grid-template-areas:
        "form result"
        "list result";
    gap: 24px 30px;
    align-items: start;
    width: min(100% - 40px, var(--global-max-width));
    margin: 30px auto 50px;
}

.form-card {
    grid-area: form;
}

.list-card {
    grid-area: list;
}

.result-column {
    grid-area: result;
    display: grid;
    gap: 20px;
}

.card {
    padding: 28px;
    border: 1px solid rgba(229, 231, 235, 0.9);
    border-radius: 16px;
    background: var(--surface);
    box-shadow: 0 10px 30px rgba(31, 41, 55, 0.07);
}

.section-title {
    margin: 0 0 22px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--line);
    font-size: 20px;
}

.section-title-split {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.section-count {
    color: var(--muted);
    font-size: 13px;
    font-weight: 700;
    white-space: nowrap;
}

.editing-banner {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 18px;
    padding: 12px 14px;
    border: 1px solid #e5c77a;
    border-radius: 10px;
    background: var(--warning-bg);
    color: var(--warning);
    font-size: 14px;
    font-weight: 700;
}

.form-group {
    margin-bottom: 18px;
}

label {
    display: block;
    margin-bottom: 7px;
    font-size: 15px;
    font-weight: 700;
}

.calculator-control {
    width: 100%;
    min-height: var(--control-height);
    padding: 11px 12px;
    border: 1px solid #cfd5dd;
    border-radius: var(--control-radius);
    background: #ffffff;
    color: var(--text);
    font-size: 16px;
}

select.calculator-control {
    cursor: pointer;
}

.calculator-control[aria-invalid="true"] {
    border-color: var(--danger);
    background: #fffafa;
}

.hint {
    margin: 6px 0 0;
    color: var(--muted);
    font-size: 13px;
}

.inline-alert {
    margin: 0 0 18px;
    padding: 11px 13px;
    border: 1px solid #efc0ba;
    border-radius: 9px;
    background: var(--danger-bg);
    color: #9e2f23;
    font-size: 14px;
    font-weight: 700;
}

.inline-alert:empty {
    display: none;
}

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

.button-row .button-primary {
    flex: 1 1 auto;
}

.button-row .button-secondary {
    flex: 0 0 auto;
}

.button {
    display: inline-flex;
    min-height: var(--control-height);
    align-items: center;
    justify-content: center;
    padding: 11px 16px;
    border: 0;
    border-radius: 11px;
    font-weight: 800;
    text-decoration: none;
    cursor: pointer;
}

.button-primary {
    background: var(--primary);
    color: #ffffff;
}

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

.button-secondary {
    border: 1px solid #ccd3dc;
    background: #ffffff;
    color: #344054;
}

.button-secondary:hover {
    background: #f7f8fa;
}

.button-danger {
    background: var(--danger);
    color: #ffffff;
}

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

.reset-form {
    margin: 10px 0 0;
}

.reset-button {
    width: 100%;
    min-height: 44px;
    border: 0;
    background: transparent;
    color: var(--danger);
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
}

.calculation-basis-note {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    margin: 15px 0 0;
    padding-top: 13px;
    border-top: 1px dashed var(--line);
    color: var(--muted);
    font-size: 13px;
    text-align: left;
}

.calculation-basis-note strong {
    flex: 0 0 auto;
    color: #475467;
    font-size: 13px;
    font-weight: 850;
}

.calculation-basis-note ol {
    display: flex;
    flex-wrap: wrap;
    gap: 4px 24px;
    margin: 0;
    padding-left: 20px;
}

.calculation-basis-note li {
    padding-left: 1px;
}

.actions {
    display: flex;
    justify-content: flex-end;
    gap: 2px;
    margin: 0;
}

.actions form {
    margin: 0;
}

.action-button {
    min-width: auto;
    min-height: 40px;
    padding: 8px 10px;
    border: 0;
    border-radius: 8px;
    background: transparent;
    font-size: 14px;
    font-weight: 800;
    cursor: pointer;
}

.action-button:hover {
    background: var(--bg);
}

.edit-button {
    color: var(--primary);
}

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

.result-card {
    text-align: center;
}

.result-kicker {
    margin: 0;
    color: var(--muted);
    font-size: 14px;
    font-weight: 700;
}

.total-result {
    display: block;
    margin: 5px 0 20px;
    color: var(--primary);
    font-size: clamp(30px, 6vw, 42px);
    font-weight: 900;
    letter-spacing: -0.04em;
}

.sub-result {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 13px 16px;
    border: 1px solid #e1e8f2;
    border-radius: 10px;
    background: var(--primary-soft);
    color: #425466;
    text-align: left;
}

.sub-result span {
    font-size: 14px;
    font-weight: 600;
}

.sub-result strong {
    color: var(--primary);
    font-size: 24px;
    font-weight: 800;
    white-space: nowrap;
}

.result-note {
    margin: 16px 0 0;
    color: var(--muted);
    font-size: 13px;
    text-align: left;
}

.copy-button,
.result-action-button {
    width: 100%;
    margin-top: 18px;
}

.result-action-button:first-child {
    margin-top: 0;
}

.empty-state {
    padding: 35px 5px;
    color: #7b8492;
}

.error-state {
    margin-bottom: 16px;
    padding: 13px 14px;
    border: 1px solid #efc0ba;
    border-radius: 9px;
    background: var(--danger-bg);
    color: var(--danger);
    font-weight: 800;
    text-align: left;
}

.ad-container {
    min-height: 90px;
    overflow: hidden;
    border-radius: 10px;
    background: #f8fafc;
}

.ad-container .adsbygoogle {
    min-height: 90px;
}

.ad-placeholder {
    display: grid;
    min-height: 90px;
    place-items: center;
    padding: 18px;
    border: 1px dashed #cfd5dd;
    border-radius: 10px;
    color: var(--muted);
    font-size: 13px;
}

.toast {
    position: fixed;
    z-index: 1000;
    left: 50%;
    bottom: 24px;
    max-width: calc(100% - 32px);
    transform: translate(-50%, 18px);
    padding: 12px 16px;
    border-radius: 10px;
    background: #1f2937;
    color: #ffffff;
    font-size: 14px;
    font-weight: 700;
    text-align: center;
    opacity: 0;
    pointer-events: none;
    transition: 0.2s;
}

.toast.visible {
    transform: translate(-50%, 0);
    opacity: 1;
}

.confirm-dialog {
    width: min(calc(100% - 32px), 420px);
    padding: 0;
    border: 0;
    border-radius: 16px;
    background: var(--surface);
    color: var(--text);
    box-shadow: 0 24px 70px rgba(15, 23, 42, 0.28);
}

.confirm-dialog::backdrop {
    background: rgba(15, 23, 42, 0.55);
}

.dialog-content {
    padding: 24px;
}

.dialog-title {
    margin: 0;
    font-size: 20px;
}

.dialog-description {
    margin: 10px 0 0;
    color: var(--muted);
    font-size: 14px;
}

.dialog-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-top: 24px;
}

:focus-visible {
    outline: 3px solid var(--focus);
    outline-offset: 3px;
}

@media (max-width: 760px) {
    .page-heading {
        width: min(100% - 28px, var(--global-max-width));
        margin-top: 20px;
    }

    .calculator-layout {
        grid-template-columns: 1fr;
        grid-template-areas:
            "form"
            "result"
            "list";
        width: min(100% - 28px, var(--global-max-width));
        margin-top: 18px;
        gap: 16px;
    }

    .card {
        padding: 22px 18px;
    }

    .button-row {
        flex-direction: column;
    }

    .button-row .button-secondary {
        width: 100%;
    }

    .sub-result strong {
        font-size: 22px;
    }

    .calculation-basis-note {
        display: block;
    }

    .calculation-basis-note ol {
        display: grid;
        gap: 4px;
        margin-top: 6px;
    }
}

.calculator-guide {
    width: min(100% - 40px, var(--global-max-width));
    margin: -20px auto 50px;
}

.calculator-guide__items {
    display: grid;
    gap: 10px;
}

.calculator-guide__item {
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: #ffffff;
}

.calculator-guide__item summary {
    display: flex;
    min-height: 52px;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 13px 16px;
    color: #344054;
    font-size: 15px;
    font-weight: 850;
    cursor: pointer;
    list-style: none;
}

.calculator-guide__item summary::-webkit-details-marker {
    display: none;
}

.calculator-guide__item summary::after {
    color: var(--primary);
    content: '+';
    font-size: 22px;
    font-weight: 500;
    line-height: 1;
}

.calculator-guide__item[open] summary {
    border-bottom: 1px solid var(--line);
    background: var(--primary-soft);
    color: var(--primary);
}

.calculator-guide__item[open] summary::after {
    content: '−';
}

.calculator-guide__content {
    padding: 15px 18px 17px;
    color: #475467;
    font-size: 14px;
    line-height: 1.7;
}

.calculator-guide__content ol {
    margin: 0;
    padding-left: 22px;
}

.calculator-guide__content li + li {
    margin-top: 7px;
}

@media (max-width: 760px) {
    .calculator-guide {
        width: min(100% - 28px, var(--global-max-width));
        margin-top: 0;
    }
}