/* --- Variables & Dark Theme --- */
:root {
    --primary-color: #6366f1;
    /* Indigo */
    --primary-hover: #818cf8;
    --primary-glow: rgba(99, 102, 241, 0.4);

    --bg-color: #0f172a;
    /* Deep Slate */
    --surface-color: #1e293b;
    --surface-hover: #334155;

    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --text-light: #cbd5e1;

    --border-color: #334155;
    --border-highlight: #475569;

    --shadow-glow: 0 0 15px var(--primary-glow);
    --shadow-card: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -4px rgba(0, 0, 0, 0.5);

    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;

    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Base Styles --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Cairo', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* --- Utilities --- */
.glass-card {
    background: rgba(30, 41, 59, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
}

.glow {
    box-shadow: var(--shadow-glow);
}

.text-glow {
    text-shadow: 0 0 8px rgba(255, 255, 255, 0.3);
}

/* --- Layout --- */
.app-header {
    background-color: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

.logo-icon {
    background-color: var(--primary-color);
    color: white;
    padding: 0.6rem;
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.header-titles h1 {
    font-size: 1.4rem;
    font-weight: 900;
    letter-spacing: -0.5px;
}

.header-titles p {
    font-size: 0.85rem;
    color: var(--primary-hover);
    font-weight: 600;
}

.main-container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

/* --- Section Headers --- */
.section-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.section-header.border-bottom {
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
}

.step-badge {
    background: var(--primary-color);
    color: white;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    font-size: 1.2rem;
    box-shadow: 0 0 10px var(--primary-glow);
}

.section-header h3 {
    font-size: 1.25rem;
    font-weight: 800;
    color: white;
}

.hint-text {
    font-size: 0.85rem;
    color: #fbbf24;
    margin-right: auto;
    background: rgba(251, 191, 36, 0.1);
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
}

/* --- 1. Frequency Section --- */
.frequency-grid {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.freq-card {
    display: flex;
    align-items: center;
    gap: 1.2rem;
    padding: 0.75rem 1rem;
    background: var(--surface-color);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    cursor: pointer;
    font-family: inherit;
    color: var(--text-main);
    text-align: right;
    transition: var(--transition);
    width: 100%;
}

.freq-card:hover {
    border-color: var(--border-highlight);
    background: var(--surface-hover);
    transform: translateX(-3px);
}

.freq-card.active {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, var(--surface-color), rgba(99,102,241,0.12));
    box-shadow: 0 0 20px rgba(99,102,241,0.25), inset 0 0 0 1px var(--primary-color);
}

.freq-dome-img {
    width: 110px;
    height: 75px;
    object-fit: contain;
    flex: 0 0 110px;
    border-radius: 0.4rem;
    filter: invert(1) sepia(1) saturate(4) hue-rotate(175deg) brightness(0.9);
    transition: filter var(--transition);
}

.freq-card.active .freq-dome-img {
    filter: invert(1) sepia(1) saturate(6) hue-rotate(175deg) brightness(1.1);
    filter: drop-shadow(0 0 8px rgba(34,211,238,0.5)) invert(1) sepia(1) saturate(5) hue-rotate(175deg);
}

.freq-card-meta {
    flex: 1;
    text-align: right;
}

.freq-card-title {
    font-size: 1.1rem;
    font-weight: 900;
    color: var(--text-main);
    margin-bottom: 0.25rem;
}

.freq-card.active .freq-card-title {
    color: #a5b4fc;
}

.freq-card-frac {
    display: inline-block;
    background: rgba(99,102,241,0.18);
    color: #a5b4fc;
    font-size: 0.78rem;
    font-weight: 700;
    padding: 0.15rem 0.55rem;
    border-radius: 0.25rem;
    border: 1px solid rgba(99,102,241,0.3);
    margin-bottom: 0.4rem;
}

.freq-card-desc {
    font-size: 0.82rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* --- 2. Controls Section --- */
.controls-section {
    padding: 1.5rem;
}

@media (min-width: 768px) {
    .controls-section {
        padding: 2rem;
    }
}

.controls-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 768px) {
    .controls-grid {
        grid-template-columns: 2fr 1fr;
    }
}

.control-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.control-header label {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-light);
}

.neon-select {
    background: var(--bg-color);
    color: var(--primary-hover);
    border: 1px solid var(--border-color);
    padding: 0.4rem 0.8rem;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-weight: 700;
    cursor: pointer;
    outline: none;
}

.slider-container {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

/* Custom Range Slider */
.neon-slider {
    flex: 1;
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    background: var(--bg-color);
    border-radius: 5px;
    outline: none;
    border: 1px solid var(--border-color);
}

.neon-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    box-shadow: 0 0 10px var(--primary-glow);
    transition: transform 0.1s;
}

.neon-slider::-webkit-slider-thumb:hover {
    transform: scale(1.1);
}

.slider-input-wrapper {
    width: 120px;
    position: relative;
}

.neon-input {
    width: 100%;
    background: var(--bg-color);
    border: 2px solid var(--border-color);
    color: white;
    font-size: 1.25rem;
    font-weight: 900;
    padding: 0.75rem;
    border-radius: var(--radius-md);
    outline: none;
    transition: var(--transition);
    font-family: inherit;
}

.neon-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.text-center {
    text-align: center;
}

.hub-input-wrapper {
    display: flex;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 2px solid var(--border-color);
    transition: var(--transition);
}

.hub-input-wrapper:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.hub-input-wrapper input {
    border: none;
    border-radius: 0;
}

.unit-display {
    background: var(--surface-color);
    color: var(--text-muted);
    padding: 0 1rem;
    display: flex;
    align-items: center;
    font-weight: 700;
    border-right: 1px solid var(--border-color);
}

.hub-box small {
    display: block;
    margin-top: 0.75rem;
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* --- 3. Struts Section --- */
.struts-flex-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

@media (min-width: 900px) {
    .struts-flex-container {
        flex-direction: row;
        flex-wrap: wrap;
    }
}

.strut-card {
    flex: 1;
    min-width: 250px;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    transition: var(--transition);
    overflow: hidden;
}

.strut-card:hover {
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
    transform: translateY(-3px);
    border-color: var(--border-highlight);
}

.strut-color-bg {
    position: absolute;
    top: 0;
    right: 0;
    left: 0;
    height: 4px;
}

.strut-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.strut-title {
    font-size: 1.5rem;
    font-weight: 900;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.strut-title::before {
    content: '';
    display: block;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background-color: currentColor;
    box-shadow: 0 0 8px currentColor;
}

.strut-count {
    background: var(--bg-color);
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.85rem;
    font-weight: 800;
    border: 1px solid var(--border-highlight);
}

.strut-editable {
    position: relative;
}

.strut-editable label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.strut-editable-input {
    width: 100%;
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--border-color);
    color: white;
    font-size: 2rem;
    font-weight: 900;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    text-align: left;
    direction: ltr;
    font-family: inherit;
    outline: none;
    transition: var(--transition);
}

.strut-editable-input:focus {
    background: var(--bg-color);
    border-color: currentColor;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.5), 0 0 0 2px rgba(255, 255, 255, 0.1);
}

.strut-unit {
    position: absolute;
    bottom: 1rem;
    right: 1.5rem;
    color: var(--text-muted);
    font-size: 1.2rem;
    font-weight: 700;
    pointer-events: none;
}

/* --- 4. Stats Summary --- */
.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

@media (min-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(5, 1fr);
    }
}

.stat-card {
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    align-items: flex-start;
}

.stat-icon {
    font-size: 1.5rem;
}

.glow-icon {
    filter: drop-shadow(0 0 8px rgba(255, 255, 255, 0.4));
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 900;
    color: white;
    display: flex;
    align-items: baseline;
    gap: 0.25rem;
}

.stat-value span {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 600;
}

.accent-card {
    background: rgba(99, 102, 241, 0.1);
    border-color: rgba(99, 102, 241, 0.3);
}

.accent-card .stat-value {
    color: #a5b4fc;
}

.primary-card {
    background: linear-gradient(135deg, var(--primary-color), #4338ca);
    border: none;
}

.primary-card .stat-label {
    color: #e0e7ff;
}

.primary-card .stat-value span {
    color: #c7d2fe;
}

/* --- Footer --- */
.app-footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
    font-size: 0.85rem;
    border-top: 1px solid var(--border-color);
    margin-top: 2rem;
}

/* --- Animations --- */
.fade-in {
    opacity: 0;
    animation: fadeIn 0.5s ease-out forwards;
}

.delay-1 {
    animation-delay: 0.1s;
}

.delay-2 {
    animation-delay: 0.2s;
}

.delay-3 {
    animation-delay: 0.3s;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(15px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Hide arrow keys in number input */
input[type=number]::-webkit-inner-spin-button,
input[type=number]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

input[type=number] {
    -moz-appearance: textfield;
}

/* --- 5. Materials Section --- */
.materials-wrapper {
    margin-top: 2rem;
}

.materials-container {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

@media (min-width: 768px) {
    .materials-container {
        padding: 2rem;
    }

    .materials-inputs {
        flex-direction: row;
    }

    .materials-inputs .control-box {
        flex: 1;
    }

    .materials-results {
        grid-template-columns: repeat(3, 1fr);
    }
}

.materials-inputs {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.material-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid #ef4444;
    color: #fca5a5;
    padding: 1rem;
    border-radius: var(--radius-md);
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.materials-results {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}

.mat-card {
    background: rgba(15, 23, 42, 0.4);
    border: 1px solid var(--border-color);
    padding: 1.25rem;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.mat-icon {
    font-size: 2rem;
    background: var(--surface-color);
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.5);
}

.mat-details {
    flex: 1;
}

.mat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.mat-value {
    font-size: 1.75rem;
    font-weight: 900;
    color: white;
}

.mat-value span {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-muted);
}

.alert-card {
    border-color: rgba(245, 158, 11, 0.3);
}

.alert-card .mat-value {
    color: #fcd34d;
}

.highlight-card {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(5, 150, 105, 0.2));
    border-color: rgba(16, 185, 129, 0.5);
}

.highlight-card .mat-value {
    color: #34d399;
}

/* --- Golden Suggestion Box --- */
.golden-suggestion {
    margin-top: 2rem;
    padding: 1.5rem;
    background: linear-gradient(135deg, rgba(234, 179, 8, 0.1), rgba(202, 138, 4, 0.15));
    border: 1px solid rgba(234, 179, 8, 0.5);
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: flex-start;
    animation: pulseGlow 2s infinite alternate;
}

@media (min-width: 768px) {
    .golden-suggestion {
        flex-direction: row;
        align-items: center;
    }
}

@keyframes pulseGlow {
    0% { box-shadow: 0 0 5px rgba(234, 179, 8, 0.2); }
    100% { box-shadow: 0 0 20px rgba(234, 179, 8, 0.6); }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.15); }
}

.glass-btn {
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.15);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
}

.glass-btn:hover {
    background: rgba(255,255,255,0.15);
    transform: translateY(-1px);
}

.glass-btn.primary {
    border-color: rgba(99,102,241,0.4);
    color: #a5b4fc;
}

.golden-icon {
    font-size: 2.5rem;
    text-shadow: 0 0 10px rgba(234, 179, 8, 0.8);
}

.golden-content {
    flex: 1;
}

.golden-content h4 {
    color: #fde047;
    margin-bottom: 0.25rem;
    font-size: 1.25rem;
    font-weight: 900;
}

.golden-content p {
    color: #fef08a;
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.apply-btn {
    background: #eab308;
    color: #422006;
    border: none;
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 800;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

.apply-btn:hover {
    background: #fde047;
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(234, 179, 8, 0.4);
}

/* --- 6. Structural Analysis Section --- */
.engineering-section {
    margin-top: 2rem;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid rgba(59, 130, 246, 0.3);
}

.engineering-cards {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-top: 1rem;
}

@media (min-width: 768px) {
    .engineering-cards {
        grid-template-columns: repeat(3, 1fr);
    }
}

.eng-card {
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    position: relative;
    overflow: hidden;
}

.eng-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    text-shadow: 0 0 15px rgba(59, 130, 246, 0.4);
}

.eng-value {
    font-size: 1.5rem;
    font-weight: 900;
    color: white;
    margin-bottom: 0.5rem;
}

.eng-value span {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-muted);
}

.eng-desc {
    font-size: 0.85rem;
    color: #94a3b8;
    line-height: 1.5;
}

.pipe-suggest-box {
    background: linear-gradient(90deg, rgba(59, 130, 246, 0.1), transparent);
    border-right: 4px solid #3b82f6;
    padding: 1rem;
    margin-top: 1.5rem;
    border-radius: var(--radius-md) 0 0 var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.pipe-suggest-text h4 {
    color: #93c5fd;
    margin-bottom: 0.25rem;
}

.pipe-suggest-text p {
    color: #cbd5e1;
    font-size: 0.9rem;
}

.warning-eng {
    border-color: #ef4444 !important;
}

.warning-eng .eng-icon {
    text-shadow: 0 0 15px rgba(239, 68, 68, 0.4);
}

/* --- Assembly Methods Grid --- */
.assembly-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}

@media (min-width: 768px) {
    .assembly-grid { grid-template-columns: repeat(3, 1fr); }
}

.assembly-card {
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
}

.assembly-icon { font-size: 2rem; margin-bottom: 0.75rem; }

.assembly-card h5 {
    color: #c4b5fd;
    font-size: 1rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
}

.assembly-card p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.7;
}

.assembly-detail {
    margin-top: 0.75rem;
    font-size: 0.85rem;
    color: var(--text-light);
    padding-top: 0.75rem;
    border-top: 1px solid rgba(139, 92, 246, 0.2);
}

/* --- Hub Type Selection (kept for ref) --- */
.hub-type-grid {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.hub-type-btn {
    flex: 1;
    min-width: 180px;
    background: var(--surface-color);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    cursor: pointer;
    font-family: inherit;
    color: var(--text-main);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.hub-type-btn:hover {
    border-color: var(--border-highlight);
    transform: translateY(-2px);
}

.hub-type-btn.active {
    border-color: var(--primary-color);
    background: rgba(99,102,241,0.1);
    box-shadow: 0 0 15px rgba(99,102,241,0.2);
}

.hub-type-icon { font-size: 2rem; }
.hub-type-name { font-weight: 800; font-size: 1rem; }
.hub-type-desc { font-size: 0.8rem; color: var(--text-muted); }

.hub-type-info {
    padding: 1rem;
    background: rgba(99,102,241,0.07);
    border: 1px solid rgba(99,102,241,0.2);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.7;
    min-height: 3rem;
}

/* --- Triangle Map --- */
.tri-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.tri-card {
    flex: 1;
    min-width: 160px;
    border: 2px solid;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--surface-color);
}

.tri-header {
    padding: 0.5rem 1rem;
    font-weight: 800;
    font-size: 0.85rem;
}

.tri-body {
    padding: 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
}

.tri-count {
    font-size: 2.5rem;
    font-weight: 900;
}

.tri-unit {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.tri-desc {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-align: center;
    margin-top: 0.5rem;
}

/* --- Summary Button --- */
.summary-btn {
    background: linear-gradient(135deg, var(--primary-color), #4338ca);
    color: white;
    border: none;
    padding: 1rem 2.5rem;
    border-radius: var(--radius-lg);
    font-family: inherit;
    font-size: 1.1rem;
    font-weight: 800;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 20px rgba(99,102,241,0.4);
}

.summary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(99,102,241,0.6);
}

/* --- Summary Modal Content --- */
.sum-box {
    background: rgba(15,23,42,0.5);
    border: 1px solid #334155;
    border-radius: 0.75rem;
    padding: 1.25rem;
    margin-bottom: 1rem;
}

.sum-box h4 {
    color: #6366f1;
    margin-bottom: 0.75rem;
    font-size: 1rem;
}

.sum-box ul, .sum-box ol {
    padding-right: 1.5rem;
    color: var(--text-light);
    font-size: 0.9rem;
    line-height: 2;
}

.sum-box li {
    margin-bottom: 0.25rem;
}