/**
 * 4M Calculators Styles
 * Professional table-based calculator design.
 */

:root {
    --fourm-primary: #157bd6;
    --fourm-primary-dark: #0d5ea7;
    --fourm-primary-soft: #eaf4ff;
    --fourm-secondary: #eef6fd;
    --fourm-accent: #dfeeda;
    --fourm-text: #24364a;
    --fourm-text-soft: #687889;
    --fourm-border: #d7e2ed;
    --fourm-surface: #ffffff;
    --fourm-surface-alt: #f7fafc;
    --fourm-shadow: 0 14px 36px rgba(14, 39, 67, 0.08);
    --fourm-radius: 18px;
    --fourm-radius-sm: 10px;
}

.fourm-calculator {
    margin: 32px 0;
    padding: 26px;
    background: var(--fourm-surface);
    border: 1px solid var(--fourm-border);
    border-radius: var(--fourm-radius);
    box-shadow: var(--fourm-shadow);
    color: var(--fourm-text);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif;
}

.fourm-calc-hero {
    text-align: center;
    margin-bottom: 22px;
}

.fourm-calc-hero-title {
    margin: 0 0 6px;
    color: var(--fourm-primary);
    font-size: clamp(1.85rem, 3vw, 2.25rem);
    font-weight: 700;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.fourm-calc-hero-subtitle {
    margin: 0;
    color: #8191a2;
    font-size: 1.05rem;
}

.fourm-calc-instruction {
    margin: 0 0 18px;
    padding: 14px 18px;
    background: var(--fourm-surface-alt);
    border: 1px solid var(--fourm-border);
    border-radius: 12px;
    color: var(--fourm-text);
    line-height: 1.65;
}

.fourm-calc-instruction strong {
    margin-right: 4px;
}

.fourm-table-wrap {
    overflow-x: auto;
    border: 1px solid var(--fourm-border);
    border-radius: 14px;
}

.fourm-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 980px;
}

.fourm-table th,
.fourm-table td {
    padding: 13px 12px;
    border: 1px solid var(--fourm-border);
    vertical-align: middle;
    background: #fff;
}

.fourm-table thead th {
    background: #dcedf8;
    color: var(--fourm-text);
    text-align: center;
    font-size: 0.97rem;
    font-weight: 700;
}

.fourm-table tbody th {
    font-weight: 500;
    width: 29%;
    background: #fbfcfe;
}

.fourm-table tbody td {
    width: 16%;
    text-align: center;
    color: var(--fourm-text);
}

.fourm-table strong,
.fourm-highlight-cell {
    font-weight: 700;
}

.fourm-row-highlight th,
.fourm-row-highlight td {
    background: var(--fourm-accent);
    font-weight: 700;
}

.fourm-highlight-cell {
    color: #2d5b1f;
    font-size: 1.02rem;
}

.fourm-input-wrap {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    max-width: 240px;
    margin: 0 auto;
}

.fourm-input {
    width: 100%;
    height: 42px;
    padding: 10px 12px;
    border: 1.5px solid #a7b8c8;
    border-radius: 8px;
    background: #fff;
    color: var(--fourm-text);
    text-align: center;
    font-size: 1rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    box-sizing: border-box;
}

.fourm-input:focus {
    outline: none;
    border-color: var(--fourm-primary);
    box-shadow: 0 0 0 4px rgba(21, 123, 214, 0.12);
}

.fourm-input-wrap.has-prefix .fourm-input {
    padding-left: 36px;
}

.fourm-input-wrap.has-suffix .fourm-input {
    padding-right: 36px;
}

.fourm-input-prefix,
.fourm-input-suffix {
    position: absolute;
    z-index: 2;
    top: 50%;
    transform: translateY(-50%);
    color: #4f6073;
    font-weight: 700;
    font-size: 0.95rem;
}

.fourm-input-prefix {
    left: 12px;
}

.fourm-input-suffix {
    right: 12px;
}

.fourm-calc-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    margin-top: 18px;
    flex-wrap: wrap;
}

.fourm-calc-btn {
    border: none;
    border-radius: 10px;
    padding: 14px 24px;
    cursor: pointer;
    font-size: 0.97rem;
    font-weight: 700;
    letter-spacing: 0.01em;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.fourm-calc-btn:hover {
    transform: translateY(-1px);
}

.fourm-calc-btn-primary {
    min-width: 240px;
    background: linear-gradient(180deg, #2fa0f0 0%, #1678cf 100%);
    color: #fff;
    box-shadow: 0 10px 20px rgba(22, 120, 207, 0.18);
}

.fourm-calc-btn-primary:hover {
    background: linear-gradient(180deg, #2b9bf0 0%, #0f6fc5 100%);
}

.fourm-calc-btn-secondary {
    background: #eef4fa;
    color: var(--fourm-text);
    border: 1px solid var(--fourm-border);
}

.fourm-summary {
    margin-top: 24px;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.fourm-summary-card {
    border: 1px solid var(--fourm-border);
    border-radius: 16px;
    padding: 18px;
    background: #fff;
    box-shadow: 0 10px 26px rgba(14, 39, 67, 0.05);
}

.fourm-summary-card--accent {
    background: linear-gradient(135deg, #1d8feb 0%, #0f6dc3 100%);
    border-color: transparent;
}

.fourm-summary-label {
    display: block;
    margin-bottom: 8px;
    color: #6a7c8f;
    font-size: 0.9rem;
    font-weight: 600;
}

.fourm-summary-value {
    display: block;
    font-size: clamp(1.3rem, 2.5vw, 1.8rem);
    color: var(--fourm-text);
    font-weight: 800;
}

.fourm-summary-negative {
    color: #c64848;
}

.fourm-summary-card--accent .fourm-summary-label,
.fourm-summary-card--accent .fourm-summary-value {
    color: #fff;
}

.fourm-info {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    cursor: help;
}

.fourm-info-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #4e6173;
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    line-height: 1;
}

.fourm-tooltip {
    position: absolute;
    left: 50%;
    bottom: calc(100% + 10px);
    transform: translateX(-50%);
    width: 230px;
    padding: 10px 12px;
    border-radius: 10px;
    background: #203040;
    color: #fff;
    font-size: 0.84rem;
    line-height: 1.4;
    text-align: left;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, visibility 0.2s ease;
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.18);
    z-index: 10;
}

.fourm-tooltip::after {
    content: '';
    position: absolute;
    left: 50%;
    top: 100%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: #203040;
}

.fourm-info:hover .fourm-tooltip,
.fourm-info:focus-within .fourm-tooltip {
    opacity: 1;
    visibility: visible;
}

.fourm-th-icon {
    min-width: 90px;
}

@media (max-width: 1024px) {
    .fourm-calculator {
        padding: 18px;
    }

    .fourm-summary {
        grid-template-columns: 1fr;
    }

    .fourm-calc-actions {
        justify-content: stretch;
    }

    .fourm-calc-btn {
        width: 100%;
    }
}

@media (max-width: 640px) {
    .fourm-calc-hero-title {
        font-size: 1.55rem;
    }

    .fourm-calc-hero-subtitle {
        font-size: 0.96rem;
    }

    .fourm-table th,
    .fourm-table td {
        padding: 11px 10px;
        font-size: 0.92rem;
    }
}