:root {
    --kcb-card-bg: linear-gradient(180deg, rgba(255, 255, 255, 0.985), rgba(248, 251, 248, 0.955));
    --kcb-soft-border: rgba(207, 221, 209, 0.98);
    --kcb-strong-border: rgba(191, 209, 197, 0.98);
    --kcb-shadow-lg:
        0 30px 60px rgba(8, 35, 21, 0.10),
        0 12px 28px rgba(8, 35, 21, 0.06),
        inset 0 1px 0 rgba(255, 255, 255, 0.96);
    --kcb-shadow-md:
        0 20px 38px rgba(8, 35, 21, 0.08),
        0 8px 18px rgba(8, 35, 21, 0.04),
        inset 0 1px 0 rgba(255, 255, 255, 0.96);
    --kcb-shadow-sm:
        0 14px 24px rgba(8, 35, 21, 0.06),
        inset 0 1px 0 rgba(255, 255, 255, 0.95);
}

.kcb-guide-shell {
    padding: 42px 0 84px;
}

.kcb-guide-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.72fr) minmax(280px, 0.88fr);
    gap: 28px;
    align-items: start;
}

.kcb-guide-article {
    min-width: 0;
}

.kcb-guide-body {
    padding: clamp(28px, 3vw, 42px);
    border: 1px solid var(--kcb-strong-border);
    border-radius: 32px;
    background:
        radial-gradient(circle at top right, rgba(185, 124, 34, 0.10), transparent 26%),
        radial-gradient(circle at top left, rgba(11, 92, 52, 0.05), transparent 30%),
        var(--kcb-card-bg);
    box-shadow: var(--kcb-shadow-lg);
}

.kcb-guide-heading {
    margin-bottom: 24px;
}

.kcb-guide-heading h1 {
    margin: 0;
    color: var(--text-strong);
    font-family: var(--font-heading);
    font-size: clamp(2.1rem, 4vw, 3.35rem);
    line-height: 1.04;
    letter-spacing: -0.06em;
}

.kcb-guide-summary {
    margin: 0 0 28px;
    padding: 22px 22px 20px;
    border: 1px solid rgba(232, 198, 135, 0.95);
    border-radius: 24px;
    background:
        linear-gradient(180deg, rgba(255, 251, 244, 0.98), rgba(255, 246, 231, 0.95));
    box-shadow:
        0 16px 28px rgba(180, 130, 38, 0.08),
        inset 0 1px 0 rgba(255, 255, 255, 0.96);
}

.kcb-guide-summary p {
    margin: 0;
}

.kcb-guide-body p,
.kcb-guide-body li {
    color: #1f3527;
    font-size: 1.04rem;
    line-height: 1.9;
}

.kcb-guide-body p {
    margin: 0 0 20px;
}

.kcb-guide-body a {
    color: var(--primary);
    font-weight: 700;
    text-decoration-thickness: 1.4px;
    text-underline-offset: 0.16em;
    text-decoration-color: rgba(11, 92, 52, 0.34);
}

.kcb-guide-body a:hover,
.kcb-guide-body a:focus-visible {
    color: var(--primary-2);
    text-decoration-color: rgba(15, 115, 67, 0.72);
}

.kcb-guide-body h2 {
    margin: 44px 0 18px;
    color: var(--text-strong);
    font-family: var(--font-heading);
    font-size: clamp(1.7rem, 2.3vw, 2.25rem);
    line-height: 1.14;
    letter-spacing: -0.05em;
}

.kcb-guide-body h3 {
    margin: 30px 0 14px;
    color: var(--text-strong);
    font-family: var(--font-heading);
    font-size: clamp(1.22rem, 1.7vw, 1.48rem);
    line-height: 1.18;
    letter-spacing: -0.04em;
}

.kcb-guide-body ul,
.kcb-guide-body ol {
    margin: 0 0 20px 1.2rem;
    padding: 0;
}

.kcb-guide-feature-list {
    margin: 0 0 22px;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 14px;
}

.kcb-guide-feature-list li {
    position: relative;
    margin: 0;
    padding: 18px 18px 18px 52px;
    border: 1px solid rgba(214, 226, 217, 0.98);
    border-radius: 22px;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(247, 250, 247, 0.95));
    box-shadow: var(--kcb-shadow-sm);
}

.kcb-guide-feature-list li::before {
    content: "";
    position: absolute;
    top: 22px;
    left: 22px;
    width: 10px;
    height: 10px;
    border-radius: 999px;
    background: linear-gradient(180deg, #d9b370, #b97c22);
    box-shadow: 0 0 0 6px rgba(185, 124, 34, 0.11);
}

.kcb-guide-body strong {
    color: var(--text-strong);
}

.kcb-guide-calc {
    margin: 30px 0 34px;
}

.kcb-guide-calc__surface {
    padding: clamp(24px, 3vw, 34px);
    border: 1px solid var(--kcb-soft-border);
    border-radius: 30px;
    background:
        radial-gradient(circle at top center, rgba(185, 124, 34, 0.08), transparent 28%),
        linear-gradient(180deg, rgba(255, 255, 255, 0.985), rgba(244, 249, 245, 0.96));
    box-shadow: var(--kcb-shadow-md);
}

.kcb-guide-calc__surface h2 {
    margin: 0 0 10px;
    text-align: center;
}

.kcb-guide-calc__surface > p {
    max-width: 700px;
    margin: 0 auto 24px;
    text-align: center;
    color: var(--muted);
}

.kcb-guide-calc__field label {
    display: block;
    margin-bottom: 12px;
    color: var(--text-strong);
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    text-align: center;
}

.kcb-guide-calc__input-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 14px;
    align-items: center;
}

.kcb-guide-calc__input-row input {
    width: 100%;
    min-height: 64px;
    padding: 0 22px;
    border: 1px solid rgba(183, 205, 189, 0.96);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.98);
    color: var(--text-strong);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.94),
        0 12px 24px rgba(8, 35, 21, 0.05);
}

.kcb-guide-calc__input-row input::placeholder {
    color: #7a8d82;
}

.kcb-guide-calc__input-row button {
    min-height: 64px;
    padding: 0 28px;
    border: 0;
    border-radius: 999px;
    background: linear-gradient(180deg, var(--primary-2), var(--primary));
    color: #fff;
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    box-shadow:
        0 18px 32px rgba(11, 92, 52, 0.24),
        inset 0 1px 0 rgba(255, 255, 255, 0.18);
    cursor: pointer;
}

.kcb-guide-calc__input-row button:hover,
.kcb-guide-calc__input-row button:focus-visible {
    transform: translateY(-1px);
    box-shadow:
        0 22px 36px rgba(11, 92, 52, 0.28),
        inset 0 1px 0 rgba(255, 255, 255, 0.18);
}

.kcb-guide-calc__input-row button:active {
    transform: translateY(0);
}

.kcb-guide-calc__field.is-error input,
.kcb-guide-calc__input-row input.is-error {
    border-color: rgba(183, 55, 55, 0.92);
    box-shadow:
        0 0 0 4px rgba(183, 55, 55, 0.12),
        inset 0 1px 0 rgba(255, 255, 255, 0.94);
}

.kcb-guide-calc__results {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
    margin-top: 24px;
}

.kcb-guide-calc__result-card {
    padding: 20px 18px;
    border: 1px solid var(--kcb-soft-border);
    border-radius: 22px;
    background:
        linear-gradient(180deg, rgba(253, 254, 253, 0.98), rgba(244, 248, 244, 0.95));
    box-shadow: var(--kcb-shadow-sm);
}

.kcb-guide-calc__result-card.is-error {
    border-color: rgba(183, 55, 55, 0.45);
    background:
        linear-gradient(180deg, rgba(255, 249, 249, 0.98), rgba(255, 241, 241, 0.96));
}

.kcb-guide-calc__result-card--wide {
    grid-column: 1 / -1;
}

.kcb-guide-calc__result-label {
    display: block;
    margin-bottom: 10px;
    color: var(--muted);
    font-size: 0.92rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.kcb-guide-calc__result-value {
    display: block;
    color: var(--text-strong);
    font-family: var(--font-heading);
    font-size: clamp(1.28rem, 2vw, 1.88rem);
    line-height: 1.12;
    letter-spacing: -0.05em;
}

.kcb-guide-table-wrap {
    margin: 22px 0 26px;
    overflow-x: auto;
    border: 1px solid var(--kcb-soft-border);
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.97);
    box-shadow: var(--kcb-shadow-md);
}

.kcb-guide-table-wrap table {
    width: 100%;
    border-collapse: collapse;
    min-width: 640px;
}

.kcb-guide-table-wrap thead th {
    padding: 18px 18px;
    background:
        linear-gradient(180deg, rgba(241, 247, 241, 0.98), rgba(229, 238, 231, 0.96));
    color: var(--text-strong);
    font-family: var(--font-heading);
    font-size: 0.98rem;
    font-weight: 800;
    text-align: left;
    letter-spacing: -0.02em;
    border-bottom: 1px solid rgba(206, 220, 208, 0.98);
}

.kcb-guide-table-wrap tbody td {
    padding: 16px 18px;
    color: #254233;
    font-size: 0.98rem;
    line-height: 1.65;
    border-top: 1px solid rgba(224, 232, 225, 0.9);
}

.kcb-guide-table-wrap tbody tr:nth-child(even) td {
    background: rgba(247, 250, 247, 0.72);
}

.kcb-guide-note {
    margin-top: 30px;
    padding: 18px 20px;
    border: 1px solid rgba(214, 226, 217, 0.98);
    border-radius: 20px;
    background:
        linear-gradient(180deg, rgba(250, 252, 250, 0.98), rgba(245, 249, 245, 0.95));
    box-shadow: var(--kcb-shadow-sm);
}

.kcb-guide-faqs {
    margin-top: 42px;
    counter-reset: kcb-faq-counter;
}

.kcb-guide-faqs__header {
    margin-bottom: 18px;
}

.kcb-guide-faqs__header h2 {
    margin: 0;
}

.kcb-guide-faq-card {
    counter-increment: kcb-faq-counter;
    border: 1px solid rgba(208, 220, 210, 0.98);
    border-radius: 24px;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(248, 251, 248, 0.95));
    box-shadow:
        0 18px 34px rgba(8, 35, 21, 0.07),
        inset 0 1px 0 rgba(255, 255, 255, 0.96);
    overflow: hidden;
}

.kcb-guide-faq-card + .kcb-guide-faq-card {
    margin-top: 14px;
}

.kcb-guide-faq-card summary {
    position: relative;
    display: flex;
    align-items: center;
    gap: 18px;
    padding: 20px 62px 20px 76px;
    cursor: pointer;
    list-style: none;
    color: var(--text-strong);
    font-family: var(--font-heading);
    font-size: 1.08rem;
    font-weight: 700;
    line-height: 1.35;
    letter-spacing: -0.03em;
}

.kcb-guide-faq-card summary::-webkit-details-marker {
    display: none;
}

.kcb-guide-faq-card summary::before {
    content: counter(kcb-faq-counter, decimal-leading-zero);
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    display: grid;
    place-items: center;
    width: 32px;
    height: 32px;
    border-radius: 999px;
    border: 1px solid rgba(220, 184, 113, 0.94);
    background: linear-gradient(180deg, rgba(255, 250, 240, 0.98), rgba(251, 239, 213, 0.95));
    color: #996516;
    font-size: 0.82rem;
    font-weight: 800;
    letter-spacing: 0.02em;
}

.kcb-guide-faq-card summary::after {
    content: "+";
    position: absolute;
    right: 22px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--primary);
    font-size: 1.55rem;
    font-weight: 500;
    line-height: 1;
}

.kcb-guide-faq-card[open] summary::after {
    content: "-";
}

.kcb-guide-faq-card__content {
    padding: 0 24px 22px 76px;
    border-top: 1px solid rgba(220, 230, 222, 0.9);
}

.kcb-guide-faq-card__content p {
    margin: 18px 0 0;
}

.kcb-guide-note p {
    margin: 0;
    color: #305040;
}

.kcb-guide-note a,
.kcb-guide-table-wrap a {
    color: var(--primary);
    font-weight: 700;
    text-decoration-thickness: 1.25px;
    text-underline-offset: 0.16em;
    text-decoration-color: rgba(11, 92, 52, 0.34);
}

.kcb-guide-note a:hover,
.kcb-guide-note a:focus-visible,
.kcb-guide-table-wrap a:hover,
.kcb-guide-table-wrap a:focus-visible {
    color: var(--primary-2);
    text-decoration-color: rgba(15, 115, 67, 0.68);
}

.kcb-guide-table-wrap a::after {
    content: "\2197";
    font-size: 0.88em;
    line-height: 1;
    opacity: 0.68;
}

@media (max-width: 1100px) {
    .kcb-guide-grid {
        grid-template-columns: minmax(0, 1fr);
    }

}

@media (max-width: 720px) {
    .kcb-guide-shell {
        padding: 28px 0 64px;
    }

    .kcb-guide-body {
        padding: 24px 18px;
        border-radius: 26px;
    }

    .kcb-guide-heading h1 {
        font-size: clamp(1.8rem, 9vw, 2.6rem);
    }

    .kcb-guide-calc__surface {
        padding: 22px 16px;
        border-radius: 24px;
    }

    .kcb-guide-calc__input-row {
        grid-template-columns: 1fr;
    }

    .kcb-guide-calc__input-row input,
    .kcb-guide-calc__input-row button {
        width: 100%;
    }

    .kcb-guide-calc__results {
        grid-template-columns: 1fr;
    }

    .kcb-guide-calc__result-card--wide {
        grid-column: auto;
    }

    .kcb-guide-table-wrap {
        border-radius: 20px;
    }

    .kcb-guide-feature-list li {
        padding: 16px 16px 16px 46px;
    }

    .kcb-guide-feature-list li::before {
        top: 20px;
        left: 18px;
    }

    .kcb-guide-faq-card summary {
        padding: 18px 56px 18px 68px;
        font-size: 1rem;
    }

    .kcb-guide-faq-card__content {
        padding: 0 18px 18px 68px;
    }
}