*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    min-width: 320px;
    background:
        radial-gradient(circle at 8% 4%, rgba(59,130,246,.10), transparent 28rem),
        var(--bg);
    color: var(--text);
    font-family: 'Inter', system-ui, sans-serif;
    line-height: 1.5;
}

button, input { font: inherit; }

.calculator-header {
    position: sticky;
    top: 0;
    z-index: var(--z-header);
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 68px;
    padding: 10px max(20px, calc((100vw - 1180px) / 2));
    background: color-mix(in srgb, var(--surface) 88%, transparent);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    backdrop-filter: blur(16px);
}

.brand { display: inline-flex; align-items: center; }
.brand img { width: auto; height: 42px; }
.header-actions { display: flex; align-items: center; gap: 10px; }

.icon-button, .app-link {
    min-height: 40px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--surface);
    color: var(--text);
    cursor: pointer;
}

.icon-button { width: 40px; }
.app-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 0 15px;
    color: var(--primary);
    font-size: .84rem;
    font-weight: 700;
    text-decoration: none;
}

.icon-button:hover, .app-link:hover { border-color: var(--primary-l); }

.calculator-page {
    width: min(1180px, calc(100% - 40px));
    margin: 0 auto;
    padding: 52px 0 84px;
}

.hero { max-width: 790px; margin-bottom: 28px; }
.badge-strip { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 22px; }
.pill {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 7px 12px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 999px;
    color: var(--text-2);
    font-size: .75rem;
    font-weight: 600;
}
.pill i { color: var(--c-success); }
.eyebrow {
    display: inline-block;
    margin: 0 0 12px;
    padding: 6px 12px;
    border-radius: 999px;
    background: rgba(59,130,246,.12);
    color: var(--primary-l);
    font-size: .73rem;
    font-weight: 800;
    letter-spacing: .06em;
    text-transform: uppercase;
}
.hero h1 {
    margin: 0 0 14px;
    font-size: clamp(2rem, 5vw, 3.25rem);
    line-height: 1.08;
    letter-spacing: -.035em;
}
.hero h1 span { color: var(--primary-l); }
.hero-copy { max-width: 720px; margin: 0; color: var(--text-2); font-size: 1rem; }

.status-banner {
    margin-bottom: 18px;
    padding: 11px 14px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--surface);
    color: var(--text-2);
    font-size: .82rem;
}
.status-banner.ready { display: none; }
.status-banner.error { border-color: var(--c-danger-l); color: var(--c-danger); }

.stat-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin-bottom: 18px; }
.stat-card, .panel {
    background: var(--surface);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}
.stat-card { padding: 20px; border-radius: 14px; }
.stat-value { display: block; color: var(--primary-l); font-size: 1.7rem; font-weight: 800; }
.stat-value-success { color: var(--c-success-l); }
.stat-label { display: block; margin-top: 5px; color: var(--text-2); font-size: .78rem; }

.calculator-grid { display: grid; grid-template-columns: minmax(300px, 360px) 1fr; gap: 18px; }
.panel { padding: 24px; border-radius: 16px; }
.panel-heading {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 22px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--border);
}
.panel-heading h2 { margin: 0; font-size: .92rem; }
.panel-heading span { color: var(--text-2); font-size: .74rem; text-align: right; }

.field { margin-bottom: 26px; }
.field-heading { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 10px; }
.field label { font-size: .84rem; font-weight: 700; }
.field p, .button-hint { margin: 7px 0 0; color: var(--text-2); font-size: .72rem; }
.number-input {
    width: 112px;
    padding: 7px 9px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg);
    color: var(--primary-l);
    font-weight: 800;
    text-align: right;
}
.number-input:focus { border-color: var(--primary-l); outline: 3px solid rgba(59,130,246,.12); }
input[type='range'] { width: 100%; accent-color: var(--primary-l); cursor: pointer; }

.primary-button, .secondary-button {
    width: 100%;
    min-height: 46px;
    border-radius: 10px;
    font-weight: 750;
    cursor: pointer;
}
.primary-button {
    border: 0;
    background: linear-gradient(135deg, var(--primary), var(--primary-l));
    color: #fff;
    box-shadow: 0 5px 18px rgba(30,64,175,.25);
}
.primary-button:disabled { cursor: wait; opacity: .55; }
.secondary-button { border: 1px solid var(--border); background: var(--surface); color: var(--text); }
.button-hint { text-align: center; }

.stack { display: flex; height: 34px; overflow: hidden; border-radius: 9px; background: var(--bg); }
.stack-segment { min-width: 2px; transition: flex-grow var(--dur) var(--ease); }
.legend { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 14px 0 20px; }
.legend-item { display: flex; align-items: flex-start; gap: 7px; color: var(--text-2); font-size: .72rem; }
.legend-item i { width: 9px; height: 9px; flex: 0 0 9px; margin-top: 3px; border-radius: 3px; }
.breakdown { border-top: 1px solid var(--border); }
.breakdown-row {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 4px 14px;
    padding: 14px 0;
    border-bottom: 1px solid var(--border);
}
.breakdown-row span { font-size: .82rem; font-weight: 650; }
.breakdown-row small { grid-column: 1; color: var(--text-2); font-size: .7rem; }
.breakdown-row strong { grid-column: 2; grid-row: 1 / span 2; align-self: center; font-size: .88rem; }
.total-row {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 20px;
    margin-top: 18px;
    padding: 18px;
    border-radius: 12px;
    background: rgba(59,130,246,.12);
    color: var(--primary-l);
}
.total-row span { font-size: .76rem; font-weight: 800; letter-spacing: .04em; text-transform: uppercase; }
.total-row small { display: block; margin-top: 3px; color: var(--text-2); font-size: .69rem; }
.total-row strong { font-size: clamp(1.35rem, 3vw, 2rem); white-space: nowrap; }

.tariffs-panel, .tco-panel { margin-top: 18px; }
.tariff-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
.tariff-card {
    position: relative;
    padding: 18px 14px;
    border: 1px solid var(--border);
    border-radius: 13px;
    background: var(--bg);
}
.tariff-card.active { border-color: var(--primary-l); background: rgba(59,130,246,.11); }
.tariff-tag {
    position: absolute;
    top: -9px;
    right: 12px;
    padding: 3px 8px;
    border-radius: 999px;
    background: var(--primary-l);
    color: #fff;
    font-size: .65rem;
    font-weight: 800;
}
.tariff-name { margin-bottom: 9px; color: var(--text-2); font-size: .72rem; font-weight: 800; text-transform: uppercase; }
.tariff-range { min-height: 62px; font-size: .74rem; }
.tariff-price { margin: 12px 0 2px; font-size: 1.05rem; font-weight: 800; }
.tariff-note { color: var(--text-2); font-size: .68rem; }
.tariff-rate { margin-top: 11px; padding-top: 11px; border-top: 1px dashed var(--border); color: var(--primary-l); font-size: .7rem; font-weight: 750; }

.table-scroll { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; min-width: 650px; }
th, td { padding: 13px 10px; border-bottom: 1px solid var(--border); text-align: right; font-size: .8rem; }
th { color: var(--text-2); font-size: .68rem; letter-spacing: .05em; text-transform: uppercase; }
th:first-child, td:first-child { text-align: left; }
td:not(:first-child) { color: var(--primary-l); font-weight: 750; }

.disclaimer {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-top: 18px;
    padding: 18px 20px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: var(--surface);
    color: var(--text-2);
}
.disclaimer i { margin-top: 3px; color: var(--primary-l); }
.disclaimer p { margin: 0; font-size: .76rem; }

.proposal-dialog {
    width: min(480px, calc(100% - 28px));
    max-height: calc(100vh - 28px);
    padding: 28px;
    border: 1px solid var(--border);
    border-radius: 16px;
    background: var(--surface);
    color: var(--text);
    box-shadow: var(--shadow-lg);
}
.proposal-dialog::backdrop { background: rgba(15,23,42,.62); backdrop-filter: blur(4px); }
.dialog-close {
    position: absolute;
    top: 13px;
    right: 13px;
    width: 34px;
    height: 34px;
    border: 1px solid var(--border);
    border-radius: 50%;
    background: var(--bg);
    color: var(--text-2);
    cursor: pointer;
    font-size: 1.2rem;
}
.proposal-dialog h2 { margin: 0 35px 5px 0; font-size: 1.2rem; }
.dialog-copy { margin: 0 0 17px; color: var(--text-2); font-size: .8rem; }
.quote-snapshot { margin-bottom: 18px; padding: 13px 15px; border-radius: 10px; background: rgba(59,130,246,.12); font-size: .78rem; }
.quote-snapshot strong { color: var(--primary-l); }
.proposal-dialog form > label:not(.consent-row) { display: block; margin: 12px 0 5px; color: var(--text-2); font-size: .72rem; font-weight: 700; }
.proposal-dialog form > input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg);
    color: var(--text);
}
.proposal-dialog form > input:focus { border-color: var(--primary-l); outline: 3px solid rgba(59,130,246,.12); }
.consent-row { display: flex; align-items: flex-start; gap: 9px; margin: 16px 0; color: var(--text-2); font-size: .72rem; cursor: pointer; }
.consent-row input { margin-top: 3px; }
.form-error { min-height: 18px; margin: 0 0 8px; color: var(--c-danger-l); font-size: .75rem; }
.success-state { padding: 22px 0 4px; text-align: center; }
.success-state[hidden] { display: none; }
.success-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 54px;
    height: 54px;
    margin-bottom: 14px;
    border-radius: 50%;
    background: rgba(34,197,94,.15);
    color: var(--c-success-l);
    font-size: 1.35rem;
}
.success-state p { margin: 8px 0 20px; color: var(--text-2); font-size: .82rem; }

@media (max-width: 980px) {
    .tariff-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 760px) {
    .calculator-page { width: min(100% - 24px, 1180px); padding-top: 34px; }
    .calculator-grid, .stat-grid { grid-template-columns: 1fr; }
    .legend { grid-template-columns: 1fr; }
    .tariff-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
    .calculator-header { padding-inline: 12px; }
    .app-link span { display: none; }
    .app-link { width: 40px; padding: 0; justify-content: center; }
    .panel { padding: 18px; }
    .tariff-grid { grid-template-columns: 1fr; }
    .tariff-range { min-height: 0; }
    .total-row { align-items: flex-start; flex-direction: column; }
    .proposal-dialog { padding: 23px 18px; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { transition-duration: .01ms !important; }
}