:root {
    --bg-dark: #212121;
    --accent: #B71C1C;
    --accent-glow: rgba(183, 28, 28, 0.4);
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text-primary: #ffffff;
    --text-secondary: #aaaaaa;
    --risk-low: #10b981;
    /* Emerald */
    --risk-moderate: #f59e0b;
    /* Amber */
    --risk-severe: #ef4444;
    /* Red */
    --zone-high: #f97316;
    /* Orange-Red */
    --zone-severe: #b91c1c;
    /* Deep Red */
    --transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

h1,
h2,
h3,
.logo {
    font-family: 'Outfit', sans-serif;
    font-weight: 800;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section-padding {
    padding: 100px 0;
}

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

.accent {
    color: var(--accent);
}

/* Background Seismic Pulse */
.bg-animation::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 200vmax;
    height: 200vmax;
    transform: translate(-50%, -50%);
    background: repeating-radial-gradient(circle,
            var(--accent-glow) 0%,
            transparent 5%,
            transparent 10%);
    opacity: 0.05;
    animation: seismic-pulse 15s infinite linear;
}

@keyframes seismic-pulse {
    0% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0.05;
    }

    50% {
        opacity: 0.1;
    }

    100% {
        transform: translate(-50%, -50%) scale(1.5);
        opacity: 0.05;
    }
}

/* Glassmorphism utility with glowing borders */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    position: relative;
    overflow: hidden;
}

.glass::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 1px;
    background: linear-gradient(45deg, transparent, var(--glass-border), var(--accent), var(--glass-border), transparent);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0.3;
    transition: var(--transition);
    pointer-events: none;
    /* Add this to allow clicks through the border */
}

.card:hover::after {
    opacity: 1;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 90%;
    max-width: 1000px;
    z-index: 1000;
    padding: 15px 30px;
    display: flex;
    justify-content: center;
}

.nav-container {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    text-decoration: none;
    color: #fff;
    letter-spacing: 1px;
}

.logo span {
    color: var(--accent);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    transition: var(--transition);
}

.nav-links a:hover {
    color: var(--accent);
    text-shadow: 0 0 10px var(--accent-glow);
}

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    padding-top: 80px;
}

.hero h1 {
    font-size: clamp(2.5rem, 8vw, 5rem);
    line-height: 1.1;
    margin-bottom: 20px;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 40px;
}

/* Seismic Wave Animation */
.seismic-wave-container {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 150px;
    display: flex;
    justify-content: center;
    align-items: flex-end;
    pointer-events: none;
    z-index: -1;
}

.wave {
    position: absolute;
    width: 200%;
    height: 100%;
    background: linear-gradient(transparent, var(--accent-glow));
    opacity: 0.3;
    animation: wave-anim 8s infinite linear;
    mask-image: linear-gradient(to top, black, transparent);
}

.wave:nth-child(2) {
    animation-delay: -2s;
    opacity: 0.2;
}

.wave:nth-child(3) {
    animation-delay: -4s;
    opacity: 0.1;
}

@keyframes wave-anim {
    0% {
        transform: translateX(0) scaleY(1);
    }

    50% {
        transform: translateX(-25%) scaleY(1.2);
    }

    100% {
        transform: translateX(-50%) scaleY(1);
    }
}

/* CTA Button */
.cta-button {
    display: inline-block;
    padding: 18px 40px;
    text-decoration: none;
    color: #000;
    background: var(--accent);
    border-radius: 50px;
    font-weight: 800;
    font-size: 1.1rem;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.cta-button:hover {
    transform: scale(1.05);
    box-shadow: 0 0 30px var(--accent-glow);
}

.cta-button .glow {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, #fff 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
}

.cta-button:hover .glow {
    opacity: 0.2;
}

/* Prediction Section */
.grid-layout {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr 1.2fr;
    gap: 30px;
    align-items: start;
}

.card {
    padding: 40px;
    transition: var(--transition);
}

.card:hover {
    border-color: var(--accent-glow);
    transform: translateY(-5px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

.unit-converter {
    padding: 25px !important;
    height: fit-content;
}

.unit-converter h3 {
    font-size: 1.1rem;
    margin-bottom: 20px;
    color: var(--accent);
}

.converter-inputs {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
}

.c-input {
    position: relative;
    flex: 1;
}

.c-input span {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.7rem;
    color: var(--text-secondary);
    pointer-events: none;
}

.c-input input {
    padding-right: 30px !important;
}

.c-swap {
    color: var(--text-secondary);
    display: flex;
    align-items: center;
}

.c-swap i {
    width: 16px;
    height: 16px;
}

.converter-actions {
    display: flex;
    gap: 10px;
}

.btn-micro {
    flex: 1;
    padding: 8px;
    font-size: 0.7rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    border-radius: 5px;
    cursor: pointer;
    transition: var(--transition);
}

.btn-micro:hover {
    background: var(--accent);
    color: #000;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 50px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 60px;
    height: 4px;
    background: var(--accent);
}

/* Form Styling */
.form-group {
    margin-bottom: 25px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

label {
    display: block;
    margin-bottom: 10px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
}

input,
select {
    width: 100%;
    padding: 12px 20px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    color: #fff;
    font-family: inherit;
    transition: var(--transition);
}

select option {
    background-color: var(--bg-dark);
    color: #fff;
}

input:focus,
select:focus {
    outline: none;
    border-color: var(--accent);
    background: rgba(255, 255, 255, 0.1);
}

input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    background: rgba(255, 255, 255, 0.1);
    height: 6px;
    border-radius: 3px;
    border: none;
    padding: 0;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    background: var(--accent);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 0 10px var(--accent-glow);
}

.sparkline-container {
    margin-top: 15px;
    height: 40px;
    position: relative;
    opacity: 0.6;
    transition: var(--transition);
}

.sparkline-container:hover {
    opacity: 1;
}

.sparkline-label {
    position: absolute;
    bottom: -18px;
    right: 0;
    font-size: 0.7rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.analyze-btn {
    width: 100%;
    padding: 15px;
    background: transparent;
    border: 2px solid var(--accent);
    color: var(--accent);
    font-weight: 800;
    border-radius: 10px;
    cursor: pointer;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.analyze-btn:hover {
    background: var(--accent);
    color: #000;
    box-shadow: 0 0 20px var(--accent-glow);
}

/* Results Panel */
.results-panel {
    animation: fadeIn 0.8s ease forwards;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

.result-visualization {
    display: flex;
    align-items: center;
    gap: 40px;
    margin: 30px 0;
}

.results-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    flex: 1;
}

.stat-box {
    padding: 15px;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 12px;
    border: 1px solid var(--glass-border);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
    font-weight: 600;
}

.zone-badge,
.shear-badge {
    transition: var(--transition);
    width: 100%;
    justify-content: center;
}

.shear-badge {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--accent-glow);
}

.progress-container {
    position: relative;
    width: 120px;
    height: 120px;
}

.percentage-display {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    line-height: 1;
    width: 100%;
}

.main-percent {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--accent);
    display: flex;
    align-items: baseline;
}

.main-percent span {
    font-size: 2.2rem;
}

.confidence-text {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-top: 2px;
    opacity: 0.8;
}

.sensitivity-analysis {
    margin: 20px 0;
    padding: 20px;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 12px;
    border: 1px solid var(--glass-border);
}

.sensitivity-analysis h4 {
    font-size: 0.85rem;
    color: var(--accent);
    margin-bottom: 15px;
    text-transform: uppercase;
}

.drivers-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.driver-item {
    display: grid;
    grid-template-columns: 1fr 2fr 40px;
    align-items: center;
    gap: 15px;
    font-size: 0.85rem;
}

.driver-bar-bg {
    height: 6px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 3px;
    overflow: hidden;
}

.driver-bar-fill {
    height: 100%;
    background: var(--accent);
    box-shadow: 0 0 10px var(--accent-glow);
    transition: width 1s ease-out;
}

.scientific-assumptions {
    margin: 30px 0;
    padding: 25px;
}

.scientific-assumptions h4 {
    margin-bottom: 15px;
    color: var(--accent);
    font-size: 1rem;
}

.assumption-list {
    list-style: none;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.assumption-list li {
    margin-bottom: 10px;
    padding-left: 20px;
    position: relative;
}

.assumption-list li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--accent);
}

.engine-toggle-container {
    margin-bottom: 25px;
}

.engine-toggle {
    display: flex;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    padding: 4px;
    margin-top: 10px;
}

.tgl-btn {
    flex: 1;
    padding: 10px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.85rem;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
}

.tgl-btn.active {
    background: var(--accent);
    color: #000;
    box-shadow: 0 0 15px var(--accent-glow);
}

.fem-analysis {
    margin: 20px 0;
    padding: 20px;
    background: rgba(183, 28, 28, 0.02);
    border: 1px solid var(--accent-glow);
    border-radius: 15px;
}

.fem-analysis h4 {
    font-size: 0.85rem;
    color: var(--accent);
    margin-bottom: 15px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.fem-simulation-viewport {
    height: 300px;
    width: 100%;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 10px;
    position: relative;
    padding: 20px;
}

.fem-legend {
    position: absolute;
    bottom: 10px;
    right: 20px;
    font-size: 0.7rem;
    color: var(--text-secondary);
    text-transform: uppercase;
}

.badge {
    padding: 8px 16px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 5px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.badge i {
    width: 18px;
    height: 18px;
}

/* Component Analysis Chart */
.component-analysis {
    margin: 30px 0;
    padding: 20px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 15px;
    border: 1px solid var(--glass-border);
}

.component-analysis h4 {
    margin-bottom: 20px;
    color: var(--accent);
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 1px;
}

.chart-container {
    position: relative;
    height: 300px;
    width: 100%;
}

/* Building Visual */
.building-preview {
    height: 200px;
    display: flex;
    justify-content: center;
    align-items: flex-end;
    margin: 30px 0;
    perspective: 1000px;
}

.building {
    width: 100px;
    height: 150px;
    background: #333;
    border: 2px solid #555;
    position: relative;
    border-radius: 5px 5px 0 0;
}

.windows {
    position: absolute;
    top: 10px;
    left: 10px;
    right: 10px;
    bottom: 0;
    background-image:
        radial-gradient(circle, var(--accent-glow) 1px, transparent 1px);
    background-size: 15px 15px;
}

.cracks {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s, transform 0.5s;
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="150" viewBox="0 0 100 150"><path d="M10 20 L30 50 L20 80 L50 100 L40 130 M60 10 L80 40 L70 90 L90 120" stroke="%23ff4444" stroke-width="2" fill="none"/></svg>');
    filter: drop-shadow(0 0 5px rgba(255, 68, 68, 0.5));
}

.debris {
    position: absolute;
    inset: -20px;
    pointer-events: none;
    opacity: 0;
    background-image: radial-gradient(circle, rgba(170, 170, 170, 0.4) 1px, transparent 1px);
    background-size: 10px 10px;
    transition: opacity 0.5s;
}

/* Sequence Classes */
.shake-intense {
    animation: shake 0.1s infinite !important;
}

.structural-failure {
    transform: translateY(20px) rotate(2deg);
    filter: grayscale(0.5) contrast(1.2);
    transition: transform 1s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.debris-cloud {
    opacity: 1 !important;
    animation: smoke 2s ease-out forwards;
}

@keyframes smoke {
    0% {
        transform: scale(1);
        opacity: 0.8;
        filter: blur(2px);
    }

    100% {
        transform: scale(2);
        opacity: 0;
        filter: blur(10px);
    }
}

@keyframes flash-red {

    0%,
    100% {
        box-shadow: 0 0 0px transparent;
    }

    50% {
        box-shadow: 0 0 50px var(--risk-severe);
    }
}

.critical-flash {
    animation: flash-red 0.5s 3;
}

/* History Table Styles */
.table-responsive {
    overflow-x: auto;
    margin-top: 20px;
}

#history-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

#history-table th,
#history-table td {
    padding: 15px 20px;
    border-bottom: 1px solid var(--glass-border);
}

#history-table th {
    color: var(--accent);
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 1px;
}

#history-table td {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

#history-table tr:last-child td {
    border-bottom: none;
}

#history-table tr:hover td {
    color: #fff;
    background: rgba(255, 255, 255, 0.02);
}

/* Map Section */
.map-container {
    height: 500px;
    margin-top: 40px;
    border-radius: 30px;
    overflow: hidden;
    z-index: 10;
}

/* Methodology Additional Styles */
.method-list {
    list-style: none;
    margin: 20px 0;
}

.method-list li {
    margin-bottom: 15px;
    padding-left: 25px;
    position: relative;
    color: var(--text-secondary);
}

.method-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent);
}

.about-image {
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.methodology-card {
    position: relative;
    width: 200px;
    height: 200px;
}

.pulse-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    border: 2px solid var(--accent);
    border-radius: 50%;
    animation: ring-pulse 3s infinite;
}

.pulse-ring:nth-child(2) {
    animation-delay: 1s;
}

.pulse-ring:nth-child(3) {
    animation-delay: 2s;
}

@keyframes ring-pulse {
    0% {
        width: 0;
        height: 0;
        opacity: 1;
    }

    100% {
        width: 300%;
        height: 300%;
        opacity: 0;
    }
}

.center-label {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-weight: 800;
    color: var(--accent);
    text-shadow: 0 0 10px var(--accent-glow);
}

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

@media (max-width: 900px) {
    .grid-2 {
        grid-template-columns: 1fr;
    }
}

/* Stats Counter */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 40px;
}

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

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent);
}

/* Footer */
footer {
    padding: 50px 0;
    background: #080808;
    border-top: 1px solid var(--glass-border);
    text-align: center;
}

.credits {
    color: var(--text-secondary);
    font-size: 0.8rem;
    margin-top: 10px;
}

/* Responsive */
@media (max-width: 900px) {
    .grid-layout {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 3rem;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    /* Rule for results panel in third column on smaller screens */
    .results-panel {
        grid-column: 1 / -1;
        /* Make it span full width */
    }
}