/*!
 * Mach Number Calculator — module CSS (e2z-mch- prefix).
 * Color scheme (spec): Primary #0E7490 (supersonic cyan), Secondary #083344,
 * Accent #F43F5E (shock rose), BG #ECFEFF.
 * Scope: .e2z-tool-mach-number-calculator (framework shortcode wrapper).
 */

.e2z-tool-mach-number-calculator,
.e2z-tool-mach-number-calculator *,
.e2z-tool-mach-number-calculator *::before,
.e2z-tool-mach-number-calculator *::after {
	box-sizing: border-box;
}

.e2z-tool-mach-number-calculator .e2z-mch-container {
	font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
	line-height: 1.5;
	color: #083344;
	width: 100%;
	margin: 0 auto;
	background: #ECFEFF;
	border-radius: 12px;
	box-shadow: 0 4px 20px rgba(14, 116, 144, 0.13);
	overflow: hidden;
}

/* Monospace technical fields */
.e2z-tool-mach-number-calculator .e2z-mch-mono,
.e2z-tool-mach-number-calculator .e2z-mch-stat-value,
.e2z-tool-mach-number-calculator .e2z-mch-formula {
	font-family: 'SF Mono', 'Courier New', ui-monospace, Menlo, Consolas, monospace;
}

/* Header */
.e2z-tool-mach-number-calculator .e2z-mch-header {
	padding: 24px 16px;
	background: linear-gradient(135deg, #083344, #0E7490);
	color: #fff;
	text-align: center;
	border-bottom: 3px solid #F43F5E;
}
.e2z-tool-mach-number-calculator .e2z-mch-title {
	font-size: 1.75rem;
	font-weight: 700;
	margin: 0 0 4px;
	color: #fff;
}
.e2z-tool-mach-number-calculator .e2z-mch-subtitle {
	font-size: 0.88rem;
	opacity: 0.85;
	margin: 0;
}

/* Layout */
.e2z-tool-mach-number-calculator .e2z-mch-main-grid {
	display: flex;
	flex-direction: column;
	gap: 20px;
	padding: 16px;
}
@media (min-width: 1024px) {
	.e2z-tool-mach-number-calculator .e2z-mch-main-grid {
		flex-direction: row;
		align-items: flex-start;
	}
	.e2z-tool-mach-number-calculator .e2z-mch-inputs-panel { flex: 2; }
	.e2z-tool-mach-number-calculator .e2z-mch-results-panel { flex: 3; min-width: 370px; }
}

.e2z-tool-mach-number-calculator .e2z-mch-inputs-panel,
.e2z-tool-mach-number-calculator .e2z-mch-results-panel {
	background: #FFFFFF;
	border-radius: 12px;
	padding: 20px;
	border: 1px solid #A5F3FC;
	box-shadow: 0 2px 8px rgba(14, 116, 144, 0.05);
}
.e2z-tool-mach-number-calculator .e2z-mch-section-title {
	font-size: 1.05rem;
	font-weight: 600;
	color: #0E7490;
	margin: 0 0 12px;
	padding-bottom: 7px;
	border-bottom: 2px solid #FFE4E6;
}
.e2z-tool-mach-number-calculator .e2z-mch-inputs-panel .e2z-mch-section-title { margin-top: 14px; }
.e2z-tool-mach-number-calculator .e2z-mch-inputs-panel .e2z-mch-section-title:first-of-type { margin-top: 0; }

/* Tabs */
.e2z-tool-mach-number-calculator .e2z-mch-tabs {
	display: flex;
	gap: 4px;
	margin-bottom: 16px;
	background: #ECFEFF;
	padding: 4px;
	border-radius: 8px;
	flex-wrap: wrap;
}
.e2z-tool-mach-number-calculator .e2z-mch-tab {
	flex: 1;
	min-width: 140px;
	min-height: 44px;
	padding: 10px 6px;
	border: none;
	border-radius: 6px;
	background: transparent;
	color: #155E75;
	font-family: inherit;
	font-size: 0.84rem;
	font-weight: 600;
	cursor: pointer;
}
.e2z-tool-mach-number-calculator .e2z-mch-tab-active {
	background: #0E7490;
	color: #fff;
}

/* Fields */
.e2z-tool-mach-number-calculator .e2z-mch-row {
	display: flex;
	flex-wrap: wrap;
	gap: 12px;
	margin-bottom: 12px;
}
.e2z-tool-mach-number-calculator .e2z-mch-field {
	flex: 1;
	min-width: 140px;
	display: flex;
	flex-direction: column;
	margin-bottom: 12px;
}
.e2z-tool-mach-number-calculator .e2z-mch-field-narrow { min-width: 92px; max-width: 120px; }
.e2z-tool-mach-number-calculator .e2z-mch-row .e2z-mch-field { margin-bottom: 0; }
.e2z-tool-mach-number-calculator .e2z-mch-label {
	font-size: 0.85rem;
	font-weight: 500;
	color: #164E63;
	margin-bottom: 4px;
}
.e2z-tool-mach-number-calculator .e2z-mch-hint {
	font-size: 0.73rem;
	color: #7DC0CE;
	margin-top: 5px;
	line-height: 1.45;
	display: block;
}
.e2z-tool-mach-number-calculator .e2z-mch-input {
	width: 100%;
	min-height: 44px;
	padding: 10px 12px;
	border: 1px solid #A5F3FC;
	border-radius: 6px;
	font-size: 0.95rem;
	background: #fff;
	color: #083344;
}
.e2z-tool-mach-number-calculator .e2z-mch-input:focus {
	outline: none;
	border-color: #0E7490;
	box-shadow: 0 0 0 3px rgba(14, 116, 144, 0.18);
}

/* Button */
.e2z-tool-mach-number-calculator .e2z-mch-calc-btn {
	width: 100%;
	min-height: 48px;
	padding: 13px;
	border: none;
	border-radius: 8px;
	background: #0E7490;
	color: #fff;
	font-family: inherit;
	font-size: 1rem;
	font-weight: 700;
	cursor: pointer;
	display: flex;
	align-items: center;
	justify-content: center;
	gap: 8px;
	transition: filter 0.15s ease;
	margin-top: 6px;
}
.e2z-tool-mach-number-calculator .e2z-mch-calc-btn:hover { filter: brightness(1.15); }
.e2z-tool-mach-number-calculator .e2z-mch-calc-btn:focus-visible {
	outline: none;
	box-shadow: 0 0 0 3px rgba(244, 63, 94, 0.5);
}

/* Results */
.e2z-tool-mach-number-calculator .e2z-mch-empty-state {
	padding: 24px;
	text-align: center;
	color: #64748B;
	background: #F8FAFC;
	border-radius: 8px;
}
.e2z-tool-mach-number-calculator .e2z-mch-hero {
	border-radius: 10px;
	padding: 16px;
	text-align: center;
	margin-bottom: 14px;
	background: #083344;
	border-bottom: 3px solid #F43F5E;
}
.e2z-tool-mach-number-calculator .e2z-mch-hero-value {
	font-size: 2.1rem;
	font-weight: 800;
	margin: 4px 0;
	line-height: 1.1;
	font-family: 'SF Mono', 'Courier New', ui-monospace, monospace;
	word-break: break-word;
}
.e2z-tool-mach-number-calculator .e2z-mch-hero-label {
	font-size: 0.83rem;
	font-weight: 600;
	color: #67E8F9;
	margin: 0;
	opacity: 0.8;
}
.e2z-tool-mach-number-calculator .e2z-mch-val-subsonic { color: #67E8F9; }
.e2z-tool-mach-number-calculator .e2z-mch-val-transonic { color: #FBBF24; }
.e2z-tool-mach-number-calculator .e2z-mch-val-supersonic { color: #FB7185; }
.e2z-tool-mach-number-calculator .e2z-mch-val-hypersonic { color: #F43F5E; }

.e2z-tool-mach-number-calculator .e2z-mch-badge {
	display: inline-block;
	padding: 4px 14px;
	border-radius: 999px;
	font-size: 0.85rem;
	font-weight: 800;
	margin-top: 6px;
}
.e2z-tool-mach-number-calculator .e2z-mch-badge-subsonic { background: #CFFAFE; color: #155E75; }
.e2z-tool-mach-number-calculator .e2z-mch-badge-transonic { background: #FEF3C7; color: #92400E; }
.e2z-tool-mach-number-calculator .e2z-mch-badge-supersonic { background: #FFE4E6; color: #BE123C; }
.e2z-tool-mach-number-calculator .e2z-mch-badge-hypersonic { background: #F43F5E; color: #fff; }

/* Regime scale bar */
.e2z-tool-mach-number-calculator .e2z-mch-scale-wrap { position: relative; margin: 14px 0 4px; }
.e2z-tool-mach-number-calculator .e2z-mch-scale {
	display: flex;
	height: 24px;
	border-radius: 999px;
	overflow: hidden;
	border: 1px solid #E2E8F0;
}
.e2z-tool-mach-number-calculator .e2z-mch-scale-seg {
	display: flex;
	align-items: center;
	justify-content: center;
	font-size: 0.62rem;
	font-weight: 700;
	color: #fff;
}
.e2z-tool-mach-number-calculator .e2z-mch-scale-sub { background: #06B6D4; }
.e2z-tool-mach-number-calculator .e2z-mch-scale-tra { background: #F59E0B; }
.e2z-tool-mach-number-calculator .e2z-mch-scale-sup { background: #FB7185; }
.e2z-tool-mach-number-calculator .e2z-mch-scale-hyp { background: #BE123C; }
.e2z-tool-mach-number-calculator .e2z-mch-scale-marker {
	position: absolute;
	top: -5px;
	width: 4px;
	height: 34px;
	background: #083344;
	border-radius: 2px;
	border: 1px solid #fff;
}
.e2z-tool-mach-number-calculator .e2z-mch-scale-labels {
	display: flex;
	font-size: 0.66rem;
	color: #64748B;
	margin-top: 4px;
	font-weight: 700;
	position: relative;
	height: 14px;
}
.e2z-tool-mach-number-calculator .e2z-mch-scale-labels span { position: absolute; transform: translateX(-50%); }

.e2z-tool-mach-number-calculator .e2z-mch-result-block {
	background: #F8FAFC;
	border: 1px solid #CFFAFE;
	border-radius: 10px;
	padding: 14px;
	margin-bottom: 12px;
}
.e2z-tool-mach-number-calculator .e2z-mch-result-block h3 {
	font-size: 1rem;
	color: #083344;
	margin: 0 0 10px;
}
.e2z-tool-mach-number-calculator .e2z-mch-stat-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
	gap: 10px;
}
.e2z-tool-mach-number-calculator .e2z-mch-stat {
	background: #fff;
	border: 1px solid #CFFAFE;
	border-radius: 8px;
	padding: 10px;
	text-align: center;
}
.e2z-tool-mach-number-calculator .e2z-mch-stat-label {
	font-size: 0.72rem;
	font-weight: 600;
	color: #64748B;
	margin: 0 0 3px;
	font-family: 'Inter', system-ui, sans-serif;
}
.e2z-tool-mach-number-calculator .e2z-mch-stat-value {
	font-size: 1rem;
	font-weight: 700;
	color: #083344;
	margin: 0;
	word-break: break-word;
}
.e2z-tool-mach-number-calculator .e2z-mch-stat-cyan .e2z-mch-stat-value { color: #0E7490; }
.e2z-tool-mach-number-calculator .e2z-mch-stat-rose .e2z-mch-stat-value { color: #BE123C; }

.e2z-tool-mach-number-calculator .e2z-mch-formula {
	display: block;
	background: #083344;
	color: #67E8F9;
	border-radius: 6px;
	padding: 9px 11px;
	font-size: 0.85rem;
	margin: 8px 0 0;
	overflow-x: auto;
	white-space: pre;
}
.e2z-tool-mach-number-calculator .e2z-mch-steps {
	list-style: none;
	margin: 0;
	padding: 0;
}
.e2z-tool-mach-number-calculator .e2z-mch-steps li {
	padding: 7px 10px 7px 12px;
	border-left: 3px solid #F43F5E;
	margin-bottom: 7px;
	background: #fff;
	border-radius: 0 6px 6px 0;
	font-size: 0.86rem;
	border-top: 1px solid #ECFEFF;
	border-right: 1px solid #ECFEFF;
	border-bottom: 1px solid #ECFEFF;
}

.e2z-tool-mach-number-calculator .e2z-mch-note {
	font-size: 0.84rem;
	margin: 8px 0 0;
	padding: 9px 11px;
	border-radius: 6px;
}
.e2z-tool-mach-number-calculator .e2z-mch-note-info { background: #CFFAFE; color: #155E75; border-left: 3px solid #0E7490; }
.e2z-tool-mach-number-calculator .e2z-mch-note-warn { background: #FFF1F2; color: #9F1239; border-left: 3px solid #F43F5E; }
.e2z-tool-mach-number-calculator .e2z-mch-note-error { background: #FEF2F2; color: #991B1B; border-left: 3px solid #DC2626; }

/* Export */
.e2z-tool-mach-number-calculator .e2z-mch-export-row {
	display: flex;
	gap: 10px;
	flex-wrap: wrap;
	margin-top: 12px;
}
.e2z-tool-mach-number-calculator .e2z-mch-print-btn,
.e2z-tool-mach-number-calculator .e2z-mch-copy-btn {
	flex: 1;
	min-height: 44px;
	padding: 11px;
	border: none;
	border-radius: 8px;
	color: #fff;
	font-family: inherit;
	font-size: 0.88rem;
	font-weight: 600;
	cursor: pointer;
	display: flex;
	align-items: center;
	justify-content: center;
	gap: 6px;
}
.e2z-tool-mach-number-calculator .e2z-mch-print-btn { background: #083344; }
.e2z-tool-mach-number-calculator .e2z-mch-copy-btn { background: #0E7490; }
.e2z-tool-mach-number-calculator .e2z-mch-print-btn:hover,
.e2z-tool-mach-number-calculator .e2z-mch-copy-btn:hover { filter: brightness(1.25); }

.e2z-tool-mach-number-calculator .e2z-mch-disclaimer {
	font-size: 0.75rem;
	color: #7DC0CE;
	margin: 12px 0 0;
	line-height: 1.45;
}

.e2z-tool-mach-number-calculator .e2z-mch-hidden { display: none !important; }

/* Responsive */
@media (max-width: 480px) {
	.e2z-tool-mach-number-calculator .e2z-mch-title { font-size: 1.32rem; }
	.e2z-tool-mach-number-calculator .e2z-mch-inputs-panel,
	.e2z-tool-mach-number-calculator .e2z-mch-results-panel { padding: 14px; }
	.e2z-tool-mach-number-calculator .e2z-mch-hero-value { font-size: 1.6rem; }
	.e2z-tool-mach-number-calculator .e2z-mch-tab { min-width: 100%; }
}
@media (max-width: 360px) {
	.e2z-tool-mach-number-calculator .e2z-mch-header { padding: 16px 10px; }
	.e2z-tool-mach-number-calculator .e2z-mch-title { font-size: 1.14rem; }
	.e2z-tool-mach-number-calculator .e2z-mch-field { min-width: 100%; }
	.e2z-tool-mach-number-calculator .e2z-mch-field-narrow { max-width: 100%; }
}