/**
 * Material Strength Table – Frontend Styles
 *
 * Clean, professional engineering-tool aesthetic.
 * @package MaterialStrengthTable
 */

/* ==========================================================================
   Variables
   ========================================================================== */
:root {
    --mst-primary: #1a3a5c;
    --mst-primary-light: #2b5a8c;
    --mst-accent: #2d7dd2;
    --mst-accent-hover: #1b6ec2;
    --mst-success: #1a7f4b;
    --mst-success-bg: #ecfdf5;
    --mst-success-border: #86efac;
    --mst-warning: #92600a;
    --mst-warning-bg: #fffbeb;
    --mst-warning-border: #fcd34d;
    --mst-danger: #991b1b;
    --mst-danger-bg: #fef2f2;
    --mst-danger-border: #fca5a5;
    --mst-text: #1e293b;
    --mst-text-secondary: #64748b;
    --mst-bg: #ffffff;
    --mst-bg-muted: #f8fafc;
    --mst-border: #e2e8f0;
    --mst-border-focus: #2d7dd2;
    --mst-radius: 8px;
    --mst-radius-lg: 12px;
    --mst-shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --mst-shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
    --mst-shadow-lg: 0 4px 12px rgba(0,0,0,0.08);
    --mst-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, sans-serif;
    --mst-font-mono: "SF Mono", "Cascadia Code", "Fira Code", monospace;
    --mst-transition: 0.2s ease;
}

/* ==========================================================================
   Container
   ========================================================================== */
.mst-calculator {
    max-width: 820px;
    margin: 2em auto;
    padding: 0;
    font-family: var(--mst-font);
    color: var(--mst-text);
    background: var(--mst-bg);
    border: 1px solid var(--mst-border);
    border-radius: var(--mst-radius-lg);
    box-shadow: var(--mst-shadow-lg);
    overflow: hidden;
    line-height: 1.5;
}

.mst-calculator *,
.mst-calculator *::before,
.mst-calculator *::after {
    box-sizing: border-box;
}

/* ==========================================================================
   Header
   ========================================================================== */
.mst-calc-header {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 24px 28px;
    background: linear-gradient(135deg, var(--mst-primary) 0%, var(--mst-primary-light) 100%);
    color: #fff;
}

.mst-calc-header-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: rgba(255,255,255,0.15);
    border-radius: var(--mst-radius);
    flex-shrink: 0;
}

.mst-calc-title {
    font-size: 1.35em;
    font-weight: 700;
    margin: 0;
    letter-spacing: -0.01em;
    color: #fff;
}

.mst-calc-subtitle {
    font-size: 0.85em;
    margin: 2px 0 0;
    opacity: 0.8;
    font-weight: 400;
}

/* ==========================================================================
   Form
   ========================================================================== */
.mst-calc-form {
    padding: 28px;
    background: var(--mst-bg-muted);
    border-bottom: 1px solid var(--mst-border);
}

.mst-form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
}

.mst-form-grid {
    align-items: start;
}

.mst-label-placeholder,
.mst-field-error-placeholder {
    visibility: hidden;
}

.mst-btn-group {
    justify-content: flex-start;
}

.mst-btn-group .mst-btn-primary {
    min-height: 44px;
}

.mst-field-group {
    display: flex;
    flex-direction: column;
}

.mst-label {
    font-size: 0.8em;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--mst-text-secondary);
    margin-bottom: 6px;
}

.mst-required {
    color: var(--mst-danger);
}

.mst-select,
.mst-input,
.mst-textarea {
    width: 100%;
    padding: 10px 14px;
    font-size: 0.95em;
    font-family: var(--mst-font);
    color: var(--mst-text);
    background: var(--mst-bg);
    border: 1px solid var(--mst-border);
    border-radius: var(--mst-radius);
    transition: border-color var(--mst-transition), box-shadow var(--mst-transition);
    outline: none;
}

.mst-select:focus,
.mst-input:focus,
.mst-textarea:focus {
    border-color: var(--mst-border-focus);
    box-shadow: 0 0 0 3px rgba(45,125,210,0.12);
}

.mst-select:disabled {
    background: #f1f5f9;
    color: #94a3b8;
    cursor: not-allowed;
}

.mst-input-wrapper {
    position: relative;
}

.mst-input-wrapper .mst-input {
    padding-right: 50px;
}

.mst-input-unit {
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.85em;
    font-weight: 600;
    color: var(--mst-text-secondary);
    pointer-events: none;
}

.mst-field-error {
    font-size: 0.78em;
    color: var(--mst-danger);
    margin-top: 4px;
    min-height: 1em;
}

.mst-btn-group {
    display: flex;
    align-items: flex-end;
}

.mst-btn-primary,
.mst-btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 11px 28px;
    font-size: 0.95em;
    font-weight: 600;
    font-family: var(--mst-font);
    border: none;
    border-radius: var(--mst-radius);
    cursor: pointer;
    transition: background var(--mst-transition), transform var(--mst-transition);
    width: 100%;
}

.mst-btn-primary {
    background: var(--mst-accent);
    color: #fff;
}

.mst-btn-primary:hover {
    background: var(--mst-accent-hover);
}

.mst-btn-primary:active {
    transform: scale(0.98);
}

.mst-btn-secondary {
    background: var(--mst-primary);
    color: #fff;
}

.mst-btn-secondary:hover {
    background: var(--mst-primary-light);
}

.mst-btn-primary:disabled,
.mst-btn-secondary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Spinner */
.mst-spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: mst-spin 0.6s linear infinite;
}

@keyframes mst-spin {
    to { transform: rotate(360deg); }
}

/* ==========================================================================
   Messages
   ========================================================================== */
.mst-message {
    margin: 16px 28px;
    padding: 14px 18px;
    border-radius: var(--mst-radius);
    font-size: 0.9em;
    line-height: 1.5;
}

.mst-message-error {
    background: var(--mst-danger-bg);
    border: 1px solid var(--mst-danger-border);
    color: var(--mst-danger);
}

.mst-message-success {
    background: var(--mst-success-bg);
    border: 1px solid var(--mst-success-border);
    color: var(--mst-success);
}

/* ==========================================================================
   Results
   ========================================================================== */
.mst-results {
    padding: 28px;
    animation: mst-fadeIn 0.3s ease;
}

@keyframes mst-fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* Status Banner */
.mst-status-banner {
    padding: 14px 18px;
    border-radius: var(--mst-radius);
    font-weight: 600;
    font-size: 0.9em;
    margin-bottom: 22px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.mst-status-safe {
    background: var(--mst-success-bg);
    border: 1px solid var(--mst-success-border);
    color: var(--mst-success);
}

.mst-status-at_limit {
    background: var(--mst-warning-bg);
    border: 1px solid var(--mst-warning-border);
    color: var(--mst-warning);
}

.mst-status-exceeds {
    background: var(--mst-danger-bg);
    border: 1px solid var(--mst-danger-border);
    color: var(--mst-danger);
}

.mst-status-icon {
    font-size: 1.2em;
}

/* Result Grid */
.mst-result-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 20px;
}

.mst-result-card {
    padding: 16px 18px;
    background: var(--mst-bg-muted);
    border: 1px solid var(--mst-border);
    border-radius: var(--mst-radius);
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.mst-result-card-primary {
    background: linear-gradient(135deg, #eff6ff 0%, #f0f9ff 100%);
    border-color: #93c5fd;
}

.mst-result-label {
    font-size: 0.72em;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--mst-text-secondary);
    font-weight: 600;
}

.mst-result-value {
    font-size: 1.1em;
    font-weight: 700;
    color: var(--mst-text);
    font-variant-numeric: lining-nums tabular-nums;
    font-feature-settings: "zero" 0;
}

.mst-result-highlight {
    font-family: var(--mst-font);
    font-size: 1.25em;
    font-variant-numeric: lining-nums tabular-nums;
    font-feature-settings: "zero" 0;
}

.mst-result-unit {
    font-size: 0.78em;
    color: var(--mst-text-secondary);
    font-weight: 500;
}

/* Lookup Note */
.mst-lookup-note {
    padding: 12px 16px;
    background: #fffbeb;
    border: 1px solid #fde68a;
    border-radius: var(--mst-radius);
    font-size: 0.85em;
    color: #92400e;
    margin-bottom: 20px;
}

/* Comparison Bars */
.mst-comparison-bar-wrapper {
    margin-bottom: 22px;
}

.mst-section-title {
    font-size: 0.82em;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--mst-text-secondary);
    font-weight: 600;
    margin: 0 0 12px;
}

.mst-comparison-bars {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.mst-bar-row {
    display: grid;
    grid-template-columns: 70px 1fr 90px;
    gap: 10px;
    align-items: center;
}

.mst-bar-label {
    font-size: 0.82em;
    font-weight: 600;
    color: var(--mst-text-secondary);
}

.mst-bar-track {
    height: 22px;
    background: #f1f5f9;
    border-radius: 4px;
    overflow: hidden;
}

.mst-bar-fill {
    height: 100%;
    border-radius: 4px;
    transition: width 0.6s cubic-bezier(0.25, 1, 0.5, 1);
}

.mst-bar-ambient {
    background: linear-gradient(90deg, var(--mst-primary), var(--mst-primary-light));
}

.mst-bar-design {
    background: linear-gradient(90deg, var(--mst-accent), #60a5fa);
}

.mst-bar-value {
    font-size: 0.82em;
    font-weight: 600;
    font-family: var(--mst-font);
    color: var(--mst-text);
    text-align: right;
    font-variant-numeric: lining-nums tabular-nums;
    font-feature-settings: "zero" 0;
}

/* Disclaimers */
.mst-disclaimers {
    padding-top: 16px;
    border-top: 1px solid var(--mst-border);
}

.mst-disclaimer {
    font-size: 0.78em;
    color: #94a3b8;
    line-height: 1.5;
    margin: 0 0 8px;
    font-style: italic;
}

/* ==========================================================================
   Lead Form
   ========================================================================== */
.mst-lead-section {
    padding: 0 28px 28px;
}

.mst-lead-divider {
    height: 1px;
    background: var(--mst-border);
    margin-bottom: 24px;
}

.mst-lead-title {
    font-size: 1.15em;
    font-weight: 700;
    color: var(--mst-primary);
    margin: 0 0 4px;
}

.mst-lead-subtitle {
    font-size: 0.88em;
    color: var(--mst-text-secondary);
    margin: 0 0 20px;
}

.mst-lead-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 16px;
}

.mst-textarea {
    resize: vertical;
    min-height: 80px;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.mst-calc-footer {
    padding: 14px 28px;
    text-align: center;
    font-size: 0.75em;
    color: #94a3b8;
    background: var(--mst-bg-muted);
    border-top: 1px solid var(--mst-border);
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 640px) {
    .mst-calculator {
        margin: 1em;
        border-radius: var(--mst-radius);
    }

    .mst-calc-header {
        padding: 18px 20px;
    }

    .mst-calc-form {
        padding: 20px;
    }

    .mst-form-grid,
    .mst-result-grid,
    .mst-lead-grid {
        grid-template-columns: 1fr;
    }

    .mst-results {
        padding: 20px;
    }

    .mst-lead-section {
        padding: 0 20px 20px;
    }

    .mst-bar-row {
        grid-template-columns: 60px 1fr 70px;
    }
}

.mst-hp-field{position:absolute !important;left:-9999px !important;opacity:0 !important;pointer-events:none !important;}