/* =========================================================
   NeoCalculator.net — Gravel Calculator
   Professional page-specific styles.
   Reuses the existing global calculator/theme system.
   ========================================================= */

@import url('/css/percent-calculator-22ddf0d06da58bee5476ea4f3d55f776.css');

/* ---------- PAGE LAYOUT ---------- */

.gravel-container {
    padding-top: 30px;
    padding-bottom: 50px;
}

.gravel-container .hero-section,
.gravel-container .page-title,
.gravel-container .page-subtitle {
    text-align: center;
}

.gravel-container .page-subtitle {
    max-width: 850px;
    margin-left: auto;
    margin-right: auto;
}

/* ---------- CALCULATOR CARD ---------- */

.gravel-calculator-card {
    width: 100%;
    box-sizing: border-box;
    padding: 26px;
}

.gravel-calculator-card > h2 {
    margin-top: 0;
    margin-bottom: 6px;
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--text-dark);
}

.gravel-calculator-card .panel-desc {
    margin-top: 0;
    margin-bottom: 22px;
    color: var(--text-muted);
    line-height: 1.6;
}

/* Main form surface */
.gravel-form-grid {
    display: flex;
    flex-direction: column;
    gap: 0;
    background: var(--bg-input);
    padding: 22px 24px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

/* ---------- SECTION HEADINGS ---------- */

.gravel-section-title {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    box-sizing: border-box;
    padding: 8px 0 11px;
    margin: 8px 0 4px;
    border-bottom: 1px solid var(--border);
    font-size: 0.98rem;
    font-weight: 800;
    color: var(--text-dark);
}

.gravel-section-title:first-child {
    margin-top: 0;
}

.gravel-section-title::before {
    content: "";
    width: 4px;
    height: 18px;
    flex: 0 0 4px;
    border-radius: 4px;
    background: var(--primary);
}

/* ---------- AREA METHOD ---------- */

.gravel-method-group {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 10px 0 18px;
}

.gravel-radio-option {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 40px;
    box-sizing: border-box;
    padding: 8px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    color: var(--text-dark);
    font-size: 0.92rem;
    font-weight: 600;
    cursor: pointer;
    transition: border-color 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.gravel-radio-option:hover {
    border-color: var(--primary);
}

.gravel-radio-option input {
    width: auto !important;
    max-width: none !important;
    accent-color: var(--primary);
}

/* ---------- FORM ROWS ---------- */

.gravel-form-row {
    display: grid;
    grid-template-columns: 170px minmax(0, 1fr);
    align-items: center;
    gap: 18px;
    width: 100%;
    max-width: 760px;
    margin-bottom: 14px;
}

.gravel-form-row > label {
    font-weight: 650;
    font-size: 0.93rem;
    color: var(--text-dark);
}

.gravel-input-unit {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 205px;
    gap: 10px;
    min-width: 0;
    width: 100%;
}

/*
 * Important override:
 * The common calculator stylesheet may constrain number inputs.
 * Gravel inputs should fill their dedicated field area.
 */
.gravel-input,
.gravel-select {
    width: 100% !important;
    max-width: none !important;
    min-width: 0;
    min-height: 42px;
    box-sizing: border-box;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text-dark);
    font-size: 0.95rem;
    line-height: 1.2;
}

.gravel-input::placeholder {
    color: var(--text-muted);
    opacity: 0.85;
}

.gravel-input:focus,
.gravel-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

/* Disabled standard density input */
.gravel-input:disabled {
    background: var(--bg-input);
    color: var(--text-muted);
    cursor: not-allowed;
}

/* Rectangle fields */
.gravel-subgrid {
    display: flex;
    flex-direction: column;
    gap: 0;
    width: 100%;
    box-sizing: border-box;
    padding: 14px 16px 2px;
    margin-bottom: 4px;
    border: 1px dashed var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-card);
}

/* ---------- ACTION BUTTONS ---------- */

.gravel-calculator-card .pct-action-btns {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 8px;
    padding-top: 18px;
    border-top: 1px solid var(--border);
}

.gravel-calculator-card .pct-action-btns .btn {
    min-height: 42px;
}

/* ---------- RESULTS ---------- */

.gravel-result-box {
    margin-top: 22px;
}

.gravel-result-summary {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
    margin: 0 0 16px;
}

.gravel-result-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 15px;
}

.gravel-result-card span {
    display: block;
    margin-bottom: 6px;
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 600;
}

.gravel-result-card strong {
    color: var(--accent);
    font-size: 1.08rem;
    font-weight: 800;
}

.gravel-result-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 12px;
    overflow: hidden;
    border-radius: var(--radius-sm);
}

.gravel-result-table th,
.gravel-result-table td {
    padding: 11px 13px;
    border: 1px solid var(--border);
    text-align: left;
    font-size: 0.92rem;
    line-height: 1.45;
}

.gravel-result-table th {
    width: 48%;
    background: var(--bg-input);
    color: var(--text-dark);
    font-weight: 700;
}

.gravel-result-table td {
    background: var(--bg-card);
    color: var(--text-dark);
}

.gravel-result-note {
    margin-top: 14px;
    color: var(--text-muted);
    font-size: 0.88rem;
    line-height: 1.55;
}

.gravel-error {
    color: var(--danger);
    font-weight: 600;
    margin: 0;
}

/* ---------- HOW TO USE / FAQ ---------- */

.gravel-info-card {
    margin-top: 30px;
}

.gravel-info-card ol {
    margin: 0;
    padding-left: 22px;
}

.gravel-info-card li {
    margin-bottom: 8px;
}

.gravel-disclaimer {
    margin-top: 16px;
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* ---------- RESPONSIVE ---------- */

@media (max-width: 900px) {
    .gravel-result-summary {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .gravel-form-row {
        max-width: 100%;
    }
}

@media (max-width: 760px) {
    .gravel-calculator-card {
        padding: 22px 18px;
    }

    .gravel-form-grid {
        padding: 18px;
    }

    .gravel-form-row {
        grid-template-columns: 1fr;
        gap: 7px;
        margin-bottom: 15px;
    }

    .gravel-input-unit {
        grid-template-columns: minmax(0, 1fr) 180px;
    }

    .gravel-method-group {
        flex-direction: column;
        align-items: stretch;
    }

    .gravel-radio-option {
        width: 100%;
    }
}

@media (max-width: 520px) {
    .gravel-container {
        padding-top: 20px;
        padding-bottom: 35px;
    }

    .gravel-calculator-card {
        padding: 18px 14px;
    }

    .gravel-calculator-card > h2 {
        font-size: 1.18rem;
    }

    .gravel-form-grid {
        padding: 15px;
    }

    .gravel-input-unit {
        grid-template-columns: 1fr;
        gap: 8px;
    }

    .gravel-calculator-card .pct-action-btns {
        flex-direction: column;
        align-items: stretch;
    }

    .gravel-calculator-card .pct-action-btns .btn {
        width: 100%;
    }

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

    .gravel-result-table {
        table-layout: fixed;
    }

    .gravel-result-table th,
    .gravel-result-table td {
        padding: 9px 8px;
        font-size: 0.82rem;
        word-break: break-word;
    }
}