/* Shared visual system (aligned with site calculators) */
:root {
    --avc-primary: #449BD5;
    --avc-border-color: #dcdcdc;
    --avc-bg-card: #ffffff;
    --avc-bg-page: #ffffff;
    --avc-text-main: #333;
    --avc-label-color: #4a5568;
    --avc-info-icon: #6c757d; /* base (not used directly for the lighter variant) */
    --avc-green-start: #1f9252;
    --avc-green-end: #00723f;
    --avc-gray-btn: #4a4a4a;
    --avc-optional-bg: #198754;
    --avc-optional-text: #ffffff;

    --avc-input-bg: #f8f9fa;
    --avc-input-border: #d1d5db;
    --avc-input-text: #333;

    --avc-radius-card: 4px;
    --avc-radius-pill: 999px;
    --avc-radius-btn: 4px;

    --avc-font-stack: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
                      Roboto, "Helvetica Neue", Arial, sans-serif;
}

/* WRAPPER + CARD */
.avc-wrapper {
    font-family: var(--avc-font-stack);
    color: var(--avc-text-main);
    background-color: var(--avc-bg-page);
    padding: 10px;
}

.avc-card {
    background: var(--avc-bg-card);
    border: 1px solid var(--avc-border-color);
    border-radius: var(--avc-radius-card);
    padding: 15px 20px 20px;
    max-width: 1150px;
    margin: 0 auto;
}

/* FORM */
.avc-form { width: 100%; display: block; }

/* Rows for inputs */
.avc-row {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 20px;
}

.avc-field-group {
    flex: 1 1 250px;
    min-width: 250px;
}

/* LABELS */
.avc-label,
.avc-label-sm {
    display: flex;
    align-items: center;
    color: var(--avc-label-color);
    margin-bottom: 6px;
    line-height: 1.4;
}
.avc-label { font-size: 0.9rem; font-weight: 600; }
.avc-label-sm { font-size: 0.85rem; font-weight: 600; }

/* PRIMARY BLUE LABEL TEXT */
.avc-label-primary { color: var(--avc-primary); }

/* INFO ICON + TOOLTIP (lighter, transparent; unbold tooltip text) */
.avc-info-icon {
    font-size: .8rem;
    line-height: 1;
    color: rgba(68,155,213,0.45); /* subtle */
    margin-left: 4px;
    cursor: help;
    position: relative;
}

.tooltip { position: relative; display: inline-block; cursor: help; }
.tooltip .tooltiptext{
    visibility:hidden;
    width:250px;
    background:#555;
    color:#fff;
    text-align:center;
    border-radius:6px;
    padding:8px;
    position:absolute;
    z-index:9999;
    top:125%;
    left:50%;
    transform: translateX(-50%);
    opacity:0;
    transition:opacity .2s ease;
    font-size:14px;
    font-weight:400; /* not bold */
    line-height:1.4;
}
.tooltip:hover .tooltiptext,
.tooltip:focus .tooltiptext { visibility:visible; opacity:1; }

/* CUSTOM SELECT PILL WRAP */
.avc-select-wrap {
    position: relative;
    display: flex;
    align-items: center;
    border: 1px solid var(--avc-input-border);
    border-radius: var(--avc-radius-pill);
    background: var(--avc-input-bg);
    width: 100%;
    box-sizing: border-box;
}

/* remove native arrows, keep single caret */
.avc-input-select {
    appearance: none !important;
    -webkit-appearance: none !important;
    -moz-appearance: none !important;
    background: transparent !important;
    background-image: none !important;
    border: none;
    outline: none;
    width: 100%;
    font-size: 1rem;
    line-height: 1.4;
    color: var(--avc-input-text);
    padding: 10px 36px 10px 14px;
    border-radius: var(--avc-radius-pill);
    box-sizing: border-box;
}
.avc-input-select::-ms-expand { display: none; }

.avc-caret-icon {
    position: absolute;
    right: 12px;
    font-size: 1rem;
    color: rgba(0,0,0,0.35);
    line-height: 1;
    pointer-events: none;
}

/* DIMENSIONS GROUP */
.avc-dims-container { margin-top: 20px; }
.avc-dims-group { margin-bottom: 20px; }
.avc-dim-row { display:flex; flex-wrap:wrap; gap:20px; }
.avc-dim-field { flex:1 1 200px; min-width:200px; }

/* PILL INPUTS */
.avc-input-pill {
    width: 100%;
    border: 1px solid var(--avc-input-border);
    border-radius: var(--avc-radius-pill);
    background: var(--avc-input-bg);
    color: var(--avc-input-text);
    font-size: 1rem;
    line-height: 1.4;
    padding: 10px 14px;
    outline: none;
    box-sizing: border-box;
}
.avc-input-pill:focus {
    outline: 2px solid var(--avc-primary);
    background: #fff;
}

/* ERROR STATE */
.error-message {
    color: #FF4444;
    font-weight: 600;
    margin: 10px 0;
    font-size: 14px;
    display: none;
    line-height: 1.4;
}
.avc-input-pill.error {
    border-color: #FF4444;
    background: #ffecec;
}

/* ADVANCED CARD */
.avc-advanced-card {
    border: 1px solid var(--avc-border-color);
    border-radius: var(--avc-radius-card);
    background: #ffffff;
    margin-top: 20px;
}

.avc-advanced-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    padding: 12px 15px;
    font-size: 1rem;
    font-weight: 600;
    color: var(--avc-primary);
}

.avc-advanced-left { display:flex; align-items:center; flex-wrap:wrap; gap:8px; }
.avc-advanced-gear { color: rgba(0,0,0,0.35); font-size: 1.1rem; }
.avc-advanced-title { font-size:1rem; font-weight:600; color:var(--avc-primary); }

.avc-advanced-optional-badge {
    background: var(--avc-optional-bg);
    color: var(--avc-optional-text);
    border-radius: var(--avc-radius-card);
    padding: 2px 6px;
    font-size: 0.8rem;
    font-weight: 600;
    line-height: 1.2;
}

.avc-advanced-right .avc-advanced-chevron {
    color: rgba(0,0,0,0.45);
    font-size: 1.1rem;
    transition: transform 0.2s ease;
}
.avc-advanced-chevron.avc-rotate { transform: rotate(180deg); }

.avc-advanced-body {
    border-top: 1px solid var(--avc-border-color);
    padding: 15px;
    background: #fafafa;
    font-size: 0.9rem;
    color: var(--avc-text-main);
}

/* Advanced rows/cols */
.avc-advanced-grid { display:flex; flex-direction:column; gap:20px; }
.avc-adv-row { display:flex; flex-wrap:wrap; gap:20px; }
.avc-adv-field { flex:1 1 250px; min-width:250px; }

/* BUTTON ROWS */
.avc-action-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 20px;
}

.avc-btn {
    flex: 1 1 200px;
    min-width: 200px;
    border: none;
    border-radius: var(--avc-radius-btn);
    padding: 12px 15px;
    font-size: 1rem;
    font-weight: 600;
    line-height: 1.3;
    color: #fff;
    cursor: pointer;
    text-align: center;
    box-sizing: border-box;
}
.avc-btn-icon { margin-right: 6px; font-size: 1.1rem; vertical-align: middle; }

.avc-btn-calc {
    background-image: linear-gradient(90deg, var(--avc-green-start) 0%, var(--avc-green-end) 100%);
}
.avc-btn-reset { background: var(--avc-gray-btn); }

/* RESULTS GRID (centered, labels not bold) */
.avc-results-grid {
    display: flex;
    flex-wrap: wrap;
    margin-top: 20px;
    border-top: 1px solid var(--avc-border-color);
    padding-top: 20px;
    text-align: center;
    row-gap: 20px;
}
.avc-result-block { flex:1 1 200px; min-width:200px; padding:0 10px; box-sizing:border-box; text-align:center; }

.avc-result-label {
    font-size: 1rem;
    font-weight: 400; /* not bold */
    color: var(--avc-label-color);
    margin-bottom: 8px;
    text-align: center;
}
.avc-no-bold { font-weight: 400 !important; }

.avc-result-value {
    font-size: 2rem;
    font-weight: 600;
    color: #000;
    line-height: 1.2;
    word-break: break-word;
    text-align: center;
}
.gph-value { font-size:.8rem; color:#666; margin-top:5px; line-height:1.3; }
.avc-hint { font-size:.8rem; color:#666; line-height:1.3; margin-top:4px; }

/* RECOMMENDATION BOX (gap after title) */
.afc-recommend-box {
    background: rgba(68,155,213,0.1);
    border-radius: var(--avc-radius-card);
    padding: 15px;
    margin-top: 20px;
}
.afc-recommend-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--avc-primary);
    margin: 0 0 12px; /* gap after title */
    line-height: 1.4;
}
.afc-recommend-box p {
    margin: 0 0 10px;
    font-size: 0.9rem;
    color: var(--avc-text-main);
    line-height: 1.5;
}

/* FOOTER NOTE */
.avc-footer-note {
    text-align: center;
    color: #666;
    font-size: 0.8rem;
    line-height: 1.4;
    margin-top: 25px;
}

/* RESPONSIVE */
@media (max-width: 768px) {
    .avc-result-value { font-size: 1.6rem; }
}