@import url('https://fonts.googleapis.com/css2?family=Exo+2:wght@400;500;600;700&display=swap');

.dr-calculator {
    --dr-accent: #003228;
    --dr-accent-soft: #0b4b3e;
    --dr-text: #0f221d;
    --dr-bg: #f4f9f7;
    --dr-surface: #ffffff;
    --dr-border: #c9dbd4;
    --dr-shadow: 0 14px 35px rgba(0, 50, 40, 0.12);

    font-family: 'Exo 2', 'Segoe UI', Tahoma, sans-serif;
    color: var(--dr-text);
    background:
        radial-gradient(circle at 100% 0, rgba(0, 50, 40, 0.08) 0, transparent 48%),
        linear-gradient(165deg, #f8fdfb 0%, var(--dr-bg) 55%, #e8f1ee 100%);
    border: 1px solid var(--dr-border);
    border-radius: 18px;
    box-shadow: var(--dr-shadow);
    padding: 1.4rem;
    max-width: 1080px;
    margin: 1rem auto;
}

.dr-header h2 {
    margin: 0;
    font-size: clamp(1.3rem, 1.8vw, 1.8rem);
    line-height: 1.2;
    color: var(--dr-accent);
    letter-spacing: 0.02em;
    display: flex;
    align-items: center;
    gap: 0.55rem;
    flex-wrap: wrap;
}

.dr-info {
    position: relative;
    display: inline-flex;
    align-items: center;
    flex-shrink: 0;
}

.dr-info-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    border: 1.5px solid var(--dr-accent);
    color: var(--dr-accent);
    font-size: 0.75rem;
    font-style: italic;
    font-weight: 700;
    font-family: Georgia, serif;
    cursor: default;
    transition: background 0.2s ease, color 0.2s ease;
    user-select: none;
    line-height: 1;
}

.dr-info:hover .dr-info-icon,
.dr-info:focus .dr-info-icon,
.dr-info:focus-within .dr-info-icon {
    background: var(--dr-accent);
    color: #ffffff;
}

.dr-info-tip {
    position: absolute;
    top: calc(100% + 12px);
    left: 50%;
    transform: translateX(-50%) translateY(-6px);
    min-width: 290px;
    max-width: 320px;
    background: #ffffff;
    border: 1px solid var(--dr-border);
    border-radius: 14px;
    padding: 0.9rem 1rem;
    box-shadow: 0 12px 32px rgba(0, 50, 40, 0.16);
    font-size: 0.84rem;
    font-weight: 400;
    color: var(--dr-text);
    font-family: 'Exo 2', 'Segoe UI', Tahoma, sans-serif;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.22s ease, transform 0.22s ease;
    z-index: 200;
    text-align: left;
    white-space: normal;
    letter-spacing: 0;
}

.dr-info:hover .dr-info-tip,
.dr-info:focus .dr-info-tip,
.dr-info:focus-within .dr-info-tip {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
    pointer-events: auto;
}

/* Arrow pointing up toward the icon */
.dr-info-tip::before {
    content: '';
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 7px solid transparent;
    border-bottom-color: var(--dr-border);
}

.dr-info-tip::after {
    content: '';
    position: absolute;
    bottom: calc(100% - 1px);
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-bottom-color: #ffffff;
}

.dr-info-tip strong {
    display: block;
    color: var(--dr-accent);
    font-size: 0.88rem;
    margin-bottom: 0.55rem;
}

.dr-info-tip ul {
    margin: 0;
    padding: 0 0 0 1rem;
}

.dr-info-tip li {
    margin-bottom: 0.32rem;
    line-height: 1.45;
}

.dr-info-tip li:last-child {
    margin-bottom: 0;
}

.dr-info-tip b {
    color: #0a3d32;
}

.dr-header p {
    margin: 0.6rem 0 1.2rem;
    color: #2f4e46;
}

.dr-form {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
    background: rgba(255, 255, 255, 0.75);
    border: 1px solid var(--dr-border);
    border-radius: 12px;
    padding: 1rem;
}

.dr-field {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.dr-field label {
    font-weight: 600;
    font-size: 0.95rem;
}

.dr-field input {
    border: 1px solid #9bb8af;
    border-radius: 10px;
    background: #ffffff;
    color: #123029;
    padding: 0.62rem 0.72rem;
    font-size: 1rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.dr-field input:focus {
    outline: none;
    border-color: var(--dr-accent);
    box-shadow: 0 0 0 3px rgba(0, 50, 40, 0.18);
}

.dr-field small {
    color: #45665d;
    font-size: 0.82rem;
}

.dr-field input[readonly] {
    background: #eef5f2;
    border-color: #9ab7ae;
    color: #20443b;
    cursor: default;
}

.dr-actions {
    grid-column: 1 / -1;
}

.dr-actions button {
    background: linear-gradient(135deg, var(--dr-accent) 0%, var(--dr-accent-soft) 100%);
    color: #ffffff;
    border: 0;
    border-radius: 5px;
    padding: 0.7rem 1.2rem;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    letter-spacing: 0.01em;
    transition: transform 0.15s ease, box-shadow 0.2s ease;
}

.dr-actions button:hover {
    transform: translateY(-1px);
    box-shadow: 0 10px 20px rgba(0, 50, 40, 0.2);
}

.dr-actions button:active {
    transform: translateY(0);
}

.dr-error {
    grid-column: 1 / -1;
    margin: 0;
    color: #8f1f28;
    font-weight: 600;
}

.dr-results {
    margin-top: 1.2rem;
    animation: dr-fade-up 0.33s ease;
}

.dr-results h3 {
    color: var(--dr-accent);
    margin-bottom: 0.7rem;
}

.dr-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}

.dr-card {
    background: var(--dr-surface);
    border: 1px solid var(--dr-border);
    border-radius: 12px;
    padding: 0.95rem;
}

.dr-card h4 {
    margin-top: 0;
    margin-bottom: 0.6rem;
    color: #124238;
}

.dr-card dl {
    margin: 0;
}

.dr-card dl div {
    display: flex;
    justify-content: space-between;
    gap: 0.8rem;
    margin: 0.4rem 0;
}

.dr-card dt {
    font-weight: 500;
}

.dr-card dd {
    margin: 0;
    font-weight: 700;
}

.dr-section-title {
    margin: 1.1rem 0 0.45rem;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #4a7268;
}

.dr-diff {
    margin-top: 0;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.8rem;
}

.dr-diff div {
    background: linear-gradient(150deg, #f7fcfa 0%, #ecf6f2 100%);
    border: 1px solid var(--dr-border);
    border-radius: 12px;
    padding: 0.75rem 0.85rem;
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.dr-diff span {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: #1a3d34;
}

.dr-diff small {
    font-size: 0.78rem;
    color: #557a6f;
    line-height: 1.35;
}

.dr-diff strong {
    font-size: 1.12rem;
    color: #0a473b;
    margin-top: 0.15rem;
}

.dr-accordion {
    margin-top: 1rem;
    border: 1px solid var(--dr-border);
    border-radius: 14px;
    overflow: hidden;
    background: var(--dr-surface);
}

.dr-accordion-trigger {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.9rem 1rem;
    cursor: pointer;
    font-weight: 700;
    font-size: 0.97rem;
    color: var(--dr-accent);
    list-style: none;
    user-select: none;
    gap: 0.5rem;
    transition: background 0.18s ease;
}

.dr-accordion-trigger::-webkit-details-marker {
    display: none;
}

.dr-accordion-trigger:hover {
    background: #f0f8f5;
}

.dr-accordion-arrow {
    width: 10px;
    height: 10px;
    flex-shrink: 0;
    border-right: 2px solid var(--dr-accent);
    border-bottom: 2px solid var(--dr-accent);
    transform: rotate(45deg);
    transition: transform 0.22s ease;
    margin-top: -4px;
}

details[open] .dr-accordion-arrow {
    transform: rotate(-135deg);
    margin-top: 4px;
}

.dr-accordion-body {
    border-top: 1px solid var(--dr-border);
    padding: 0.85rem;
}

.dr-kpi {
    margin-top: 0;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.8rem;
}

.dr-kpi div {
    background: var(--dr-surface);
    border: 1px solid var(--dr-border);
    border-radius: 12px;
    padding: 0.75rem 0.85rem;
}

.dr-kpi span {
    display: block;
    font-size: 0.86rem;
    color: #33574e;
    margin-bottom: 0.35rem;
}

.dr-kpi strong {
    font-size: 1.18rem;
    color: var(--dr-accent);
}

.dr-kpi-total strong {
    color: #0b4b3e;
}

.dr-table-wrap h4 {
    margin: 0 0 0.65rem;
    color: var(--dr-accent);
}

.dr-table {
    width: 100%;
    border-collapse: collapse;
}

.dr-table th,
.dr-table td {
    text-align: left;
    padding: 0.55rem 0.5rem;
    border-bottom: 1px solid #d8e4df;
}

.dr-table th {
    font-size: 0.86rem;
    color: #345d53;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.dr-table td {
    font-weight: 600;
}

@keyframes dr-fade-up {
    from {
        opacity: 0;
        transform: translateY(6px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 900px) {
    .dr-form,
    .dr-grid,
    .dr-diff,
    .dr-kpi {
        grid-template-columns: 1fr;
    }

    .dr-info-tip {
        min-width: 240px;
        max-width: 90vw;
    }

    .dr-calculator {
        padding: 1rem;
    }
}