.calc-box {
    background: #fff;
    border: 2px solid #d6d6d6;
    border-radius: 10px 10px 0 0;
    padding: 1.5em 1.8em;
    margin: 2em 0 0;
    font-family: inherit;
}
.calc-box h3 {
    margin-top: 0;
    color: #ec6607;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.8em 1.5em;
    margin-bottom: 1.2em;
}
@media (max-width: 550px) {
    .calc-grid { grid-template-columns: 1fr; }
}
.calc-grid label {
    display: block;
    font-size: 0.88em;
    font-weight: 700;
    margin-bottom: 0.2em;
    color: #404040;
}
.calc-grid input {
    width: 100%;
    padding: 0.45em 0.6em;
    border: 1px solid #d6d6d6;
    border-radius: 6px;
    font-size: 1em;
    font-family: inherit;
    box-sizing: border-box;
}
.calc-grid input:focus {
    border-color: #ec6607;
    outline: none;
    box-shadow: 0 0 0 2px rgba(236, 102, 7, 0.15);
}

.calc-btn {
    background: #ec6607;
    color: #fff;
    border: none;
    padding: 0.55em 1.4em;
    border-radius: 8px;
    font-size: 1em;
    font-weight: 700;
    cursor: pointer;
    font-family: inherit;
}
.calc-btn:hover { background: #f18c45; }

.calc-example-btn {
    background: none;
    border: 1px solid #d6d6d6;
    color: #777777;
    font-size: 0.88em;
    cursor: pointer;
    font-family: inherit;
    padding: 0.45em 1em;
    border-radius: 6px;
}
.calc-example-btn:hover { border-color: #ec6607; color: #ec6607; }

.calc-reset {
    background: none;
    border: none;
    color: #aaa;
    font-size: 0.83em;
    cursor: pointer;
    font-family: inherit;
    padding: 0;
    text-decoration: underline;
    text-underline-offset: 3px;
}
.calc-reset:hover { color: #ec6607; }

.calc-results {
    margin-top: 1.4em;
    display: none;
    border-top: 1px solid #eee;
    padding-top: 1.2em;
}
.calc-results.visible { display: block; }

.calc-warning {
    background: #fff3cd;
    border: 1px solid #ffc107;
    border-radius: 6px;
    padding: 0.55em 0.9em;
    margin-bottom: 0.7em;
    font-size: 0.85em;
    color: #6d4c00;
}

.calc-final {
    background: #ec6607;
    color: #fff;
    border-radius: 8px;
    padding: 1em 1.3em;
}
.calc-final .fold-change {
    font-size: 1.7em;
    font-weight: 700;
    line-height: 1.2;
}
.calc-final .interpretation {
    font-size: 0.9em;
    margin-top: 0.5em;
    opacity: 0.93;
    line-height: 1.5;
}

.calc-copy-btn {
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: #fff;
    font-size: 0.8em;
    cursor: pointer;
    font-family: inherit;
    padding: 0.3em 0.7em;
    border-radius: 5px;
    white-space: nowrap;
    flex-shrink: 0;
    margin-top: 0.2em;
}
.calc-copy-btn:hover,
.calc-copy-btn.copied { background: rgba(255, 255, 255, 0.25); }

.show-working-btn {
    background: none;
    border: none;
    color: #ec6607;
    font-size: 0.85em;
    font-weight: 700;
    cursor: pointer;
    font-family: inherit;
    padding: 0.6em 0 0;
    display: block;
    text-decoration: underline;
    text-underline-offset: 3px;
}
.show-working-btn:hover { color: #f18c45; }

.calc-working { display: none; margin-top: 0.8em; }
.calc-working.open { display: block; }

.calc-step {
    background: #f5f5f5;
    border-radius: 5px;
    padding: 0.55em 0.9em;
    margin-bottom: 0.4em;
    font-size: 0.85em;
    color: #404040;
}
.calc-step strong { color: #777777; font-weight: 700; }

.calc-suggestions-panel {
    display: none;
    margin-top: 0;
    margin-bottom: 1.5em;
    background: #f5f5f5;
    border-radius: 0 0 10px 10px;
    border: 2px solid #d6d6d6;
    border-top: none;
    padding: 1.2em 1.8em 1.4em;
    opacity: 0;
    transition: opacity 0.2s ease;
}
.calc-suggestions-panel.visible {
    display: block;
    opacity: 1;
}
.calc-suggestions-panel .suggestions-label {
    font-size: 0.78em;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: #adadad;
    margin-bottom: 0.8em;
}

.calc-validation {
    background: #fff3cd;
    border: 1px solid #ffc107;
    border-radius: 6px;
    padding: 0.5em 0.9em;
    margin-bottom: 0.8em;
    font-size: 0.88em;
    color: #6d4c00;
}

.suggestion-item {
    display: flex;
    align-items: flex-start;
    gap: 0.8em;
    background: #fff;
    border-radius: 7px;
    padding: 0.7em 1em;
    margin-bottom: 0.5em;
    text-decoration: none;
    color: #242425;
    border: 1px solid #e8e8e8;
    transition: border-color 0.15s;
}
.suggestion-item:last-child { margin-bottom: 0; }
.suggestion-item:hover { border-color: #ec6607; color: #242425; }

.suggestion-icon {
    font-size: 1.1em;
    flex-shrink: 0;
    line-height: 1.5;
    opacity: 0.8;
}
.suggestion-text strong {
    display: block;
    font-size: 0.88em;
    font-weight: 700;
    color: #242425;
    margin-bottom: 0.1em;
}
.suggestion-text span {
    font-size: 0.8em;
    color: #777777;
    line-height: 1.4;
}