/* =========================
   Quadratic Calculator (scoped)
========================= */

.qcalc,
.qcalc * {
    box-sizing: border-box;
}

.qcalc {
    --cc-card: #fff;
    --cc-text: #222;
    --cc-muted: #6b7280;
    --cc-brand: #283b69;
    --cc-brand2: #1f2f55;
    --cc-border: #e6e8ef;
    --cc-shadow: 0 10px 25px rgba(16, 24, 40, 0.08);
    --cc-radius: 16px;

    font-family: Arial, Helvetica, sans-serif;
    color: var(--cc-text);
}

.qcalc .ccalc__wrap {
    max-width: 1200px;
    margin: 0 auto;
    padding: 18px 0 40px;
}

.qcalc .ccalc__titlebar {
    background: linear-gradient(180deg, var(--cc-brand), var(--cc-brand2));
    color: #fff;
    border-radius: var(--cc-radius);
    padding: 16px;
    box-shadow: var(--cc-shadow);
    margin-bottom: 14px;
}

.qcalc .ccalc__h1 {
    margin: 0;
    font-size: 20px;
    font-weight: 800;
}

.qcalc .ccalc__p {
    margin: 6px 0 0;
    opacity: 0.92;
    font-size: 13px;
}

.qcalc .ccalc__grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 14px;
    align-items: start;
}

.qcalc .ccalc__grid>.evc-topline {
    grid-column: 1;
    grid-row: 1;
    margin: 0;
    padding: 0 2px 6px;
}

.qcalc .ccalc__grid>.ccalc__card:first-of-type {
    grid-column: 1;
    grid-row: 2;
}

.qcalc .ccalc__grid>.ccalc__card:last-of-type {
    grid-column: 2;
    grid-row: 1 / span 2;
    margin-top: 46px;
}

@media (max-width: 980px) {
    .qcalc .ccalc__grid {
        grid-template-columns: 1fr;
    }

    .qcalc .ccalc__grid>.evc-topline,
    .qcalc .ccalc__grid>.ccalc__card:first-of-type,
    .qcalc .ccalc__grid>.ccalc__card:last-of-type {
        grid-column: 1;
        grid-row: auto;
        margin-top: 0;
    }
}

.qcalc .ccalc__card {
    background: var(--cc-card);
    border: 1px solid var(--cc-border);
    border-radius: var(--cc-radius);
    box-shadow: var(--cc-shadow);
    padding: 14px;
    min-width: 0;
}

.qcalc .ccalc__sectionTitle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding-bottom: 10px;
    margin-bottom: 12px;
    border-bottom: 1px solid var(--cc-border);
}

.qcalc .ccalc__h2 {
    font-size: 15px;
    margin: 0;
    font-weight: 800;
    color: var(--cc-brand2);
}

.qcalc .ccalc__badge {
    font-size: 12px;
    color: #fff;
    background: rgba(40, 59, 105, 0.9);
    padding: 6px 10px;
    border-radius: 999px;
    white-space: nowrap;
}

.qcalc .ccalc__rows {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 10px;
}

@media (max-width: 680px) {
    .qcalc .ccalc__rows {
        grid-template-columns: 1fr;
    }
}

.qcalc .ccalc__field {
    display: flex;
    flex-direction: column;
    gap: 6px;
    min-width: 0;
}

.qcalc-full {
    grid-column: 1 / -1;
}

.qcalc .ccalc__label {
    font-weight: 900;
    color: #2b3a55;
    font-size: 13px;
}

.qcalc .ccalc__input {
    width: 100%;
    height: 44px;
    border: 1px solid #d4d7de;
    border-radius: 12px;
    padding: 0 12px;
    outline: none;
    background: #fff;
    color: #1f2937;
    font-size: 13px;
}

.qcalc .ccalc__input::placeholder {
    color: #9ca3af;
    opacity: 1;
}

.qcalc .ccalc__input:focus {
    border-color: rgba(40, 59, 105, 0.55);
    box-shadow: 0 0 0 3px rgba(40, 59, 105, 0.12);
    color: #111827;
}

.qcalc .ccalc__actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.qcalc .ccalc__btn {
    height: 44px;
    padding: 0 14px;
    border-radius: 12px;
    border: 1px solid #d4d7de;
    background: #fff;
    cursor: pointer;
    font-weight: 900;
    color: #1f2f55;
    min-width: 160px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
}

.qcalc .ccalc__btn:hover {
    background: #f6f7fb;
    border-color: #b9c2da;
    box-shadow: 0 4px 12px rgba(31, 47, 85, 0.08);
    transform: translateY(-1px);
}

.qcalc .ccalc__btn--primary {
    background: rgba(40, 59, 105, 0.08);
    border: 1px solid rgba(40, 59, 105, 0.35);
}

.qcalc .ccalc__btn--primary:hover {
    background: rgba(40, 59, 105, 0.14);
}

.qcalc .ccalc__mt10 {
    margin-top: 10px;
}

.qcalc .ccalc__bigNumber {
    background: linear-gradient(180deg, #e9f7ef, #f6fbf8);
    border: 1px solid #bfe3cd;
    color: #1f513a;
    border-radius: var(--cc-radius);
    padding: 12px;
    font-weight: 900;
    font-size: 16px;
    box-shadow: 0 8px 20px rgba(46, 125, 90, 0.1);
    min-height: 74px;
    display: flex;
    align-items: center;
}

.qcalc .ccalc__bigNumber:not(:empty) {
    animation: resultGlow 0.35s ease;
}

@keyframes resultGlow {
    0% {
        transform: scale(0.98);
        opacity: 0.6;
    }

    100% {
        transform: scale(1);
        opacity: 1;
    }
}

.qcalc-details {
    margin-top: 12px;
    border: 1px solid var(--cc-border);
    border-radius: 14px;
    padding: 12px;
    background: #fff;
    color: #374151;
    font-size: 13px;
}

.qcalc-details:empty {
    display: none;
}

.qcalc .ccalc__toast {
    margin-top: 10px;
    font-size: 12px;
    color: var(--cc-muted);
    min-height: 16px;
}

.qcalc-formula {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 14px;
    padding: 12px;
    border-radius: 14px;
    border: 1px solid rgba(40, 59, 105, 0.12);
    background: linear-gradient(180deg, rgba(40, 59, 105, 0.04), rgba(40, 59, 105, 0.02));
}

.qcalc-formula__part {
    font-weight: 900;
    color: #1f2f55;
    font-size: 18px;
}

.qcalc-presets {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 12px;
}

.qcalc-presets .ccalc__btn {
    min-width: auto;
}

.qcalc-result-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    margin-bottom: 14px;
}

@media (max-width: 640px) {
    .qcalc-result-grid {
        grid-template-columns: 1fr;
    }
}

.qcalc-stat {
    background: #f8fafc;
    border: 1px solid rgba(40, 59, 105, 0.12);
    border-radius: 14px;
    padding: 12px;
}

.qcalc-stat__label {
    font-size: 12px;
    font-weight: 800;
    color: #6b7280;
    margin-bottom: 6px;
}

.qcalc-stat__value {
    font-size: 19px;
    font-weight: 900;
    color: #1f2f55;
    word-break: break-word;
}

.qcalc-steps {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.qcalc-step {
    background: #fff;
    border: 1px solid rgba(40, 59, 105, 0.1);
    border-radius: 12px;
    padding: 12px;
}

.qcalc-step__title {
    font-size: 13px;
    font-weight: 900;
    color: #283b69;
    margin-bottom: 6px;
}

.qcalc-step__text {
    font-size: 14px;
    line-height: 1.6;
    color: #374151;
    word-break: break-word;
}

.cc-divider {
    width: 100%;
    max-width: 900px;
    margin: 20px auto;
    border-top: 2px dashed rgba(40, 59, 105, 0.35);
}

.cc-seo,
.cc-faq {
    max-width: 900px;
    margin: 20px auto 0;
    padding: 0 16px;
}

.cc-seo h2,
.cc-faq h2 {
    font-size: 22px;
    color: #283b69;
    margin-bottom: 14px;
}

.cc-seo p {
    margin-bottom: 14px;
    line-height: 1.6;
    font-size: 15px;
    color: #222;
}

.cc-seo ul {
    margin: 0 0 14px 18px;
    padding: 0;
}

.cc-seo li {
    margin: 6px 0;
    font-size: 15px;
    color: #222;
}

.cc-faq-item {
    background: #fff;
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 14px;
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.05);
    border: 1px solid rgba(40, 59, 105, 0.1);
}

.cc-faq-item h3 {
    font-size: 16px;
    margin-bottom: 6px;
    color: #283b69;
    font-weight: 900;
}

.cc-faq-item p {
    font-size: 14px;
    color: #444;
    line-height: 1.6;
}

@media (max-width: 520px) {

    .cc-seo h2,
    .cc-faq h2 {
        font-size: 18px;
    }

    .cc-seo p,
    .cc-seo li {
        font-size: 14px;
    }

    .cc-faq-item {
        padding: 14px;
    }
}

.evc-topline {
    margin: 10px 0 10px;
}

.evc-autocalc {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 900;
    color: #111827;
    font-size: 14px;
    user-select: none;
    white-space: nowrap;
}

.evc-autocalc input {
    width: 16px;
    height: 16px;
    accent-color: #283b69;
}
.quad-examples {
    margin-top: 14px;
    padding: 14px;
    border: 1px solid #e6e8ef;
    border-radius: 14px;
    background: #f8fafc;
}

.quad-examples-title {
    font-size: 13px;
    font-weight: 700;
    color: #283b69;
    margin-bottom: 10px;
}

.quad-examples-list {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.quad-example {
    padding: 8px 12px;
    border-radius: 10px;
    border: 1px solid #d4d7de;
    background: #fff;
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    transition: all .15s ease;
}

.quad-example:hover {
    background: #f1f5f9;
    border-color: #b9c2da;
    transform: translateY(-1px);
}
.calc-nav{
    margin-top:14px;
    display:flex;
    gap:10px;
    flex-wrap:wrap;
}

.calc-nav-btn{
    flex:1;
    text-align:center;
    padding:10px 12px;
    border-radius:10px;
    font-size:13px;
    font-weight:700;
    text-decoration:none;

    background:#e6f4ea;
    border:1px solid #c8e6d1;

    /* такий самий текст як у кнопок */
    color:#1f2f55;

    transition:all .15s ease;
}

.calc-nav-btn:hover{
    background:#d7f0df;
    border-color:#b7dcc2;
    transform:translateY(-1px);
}
.calc-reset-btn {
    background: #fde8e8 !important;
    border: 1px solid #f3c6c6 !important;
    color: #1f2f55 !important;
}

.calc-reset-btn:hover {
    background: #fde6e6 !important;
    border-color: #efc1c1 !important;
}
/* operator select between fractions */

.qcalc-op {
    height: 40px;
    min-width: 64px;
    border-radius: 12px;
    border: 1px solid #d4d7de;
    font-weight: 900;
    background: #fff;
    color: #1f2f55;
    text-align: center;
    padding: 0 10px;
    cursor: pointer;
}

.qcalc-op:hover {
    background: #f6f7fb;
    border-color: #b9c2da;
}

.qcalc-op:focus {
    border-color: rgba(40, 59, 105, 0.55);
    box-shadow: 0 0 0 3px rgba(40, 59, 105, 0.12);
    outline: none;
}