/* Material Design inspired CSS */
:root {
    --primary: #ff6a00;
    --primary-variant: #cc5500;
    --secondary: #ff914d;
    --background: #FAFAFA;
    --surface: #FFFFFF;
    --error: #B00020;
    --on-primary: #FFFFFF;
    --on-secondary: #000000;
    --on-background: #000000;
    --on-surface: #000000;
    --text-primary: rgba(0, 0, 0, 0.87);
    --text-secondary: rgba(0, 0, 0, 0.60);
    --shadow-1: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
    --shadow-2: 0 3px 6px rgba(0,0,0,0.16), 0 3px 6px rgba(0,0,0,0.23);
    --shadow-3: 0 10px 20px rgba(0,0,0,0.19), 0 6px 6px rgba(0,0,0,0.23);
    --transition-speed: 0.3s;
}

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

body {
    font-family: 'Roboto', sans-serif;
    background-color: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

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

/* Header */
.header {
    background-color: var(--primary);
    color: var(--on-primary);
    padding: 16px 0;
    box-shadow: var(--shadow-2);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    font-size: 1.5rem;
    font-weight: 500;
    letter-spacing: 0.0125em;
}

/* Main Content */
main {
    flex: 1;
}

/* Hero Section */
.hero {
    padding: 80px 0;
    text-align: center;
    background-color: var(--surface);
    border-bottom: 1px solid rgba(0,0,0,0.12);
}

.hero-title {
    font-size: 3rem;
    font-weight: 300;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
    outline: none;
}

.hero-title:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 8px;
    border-radius: 4px;
}

.static-text {
    font-weight: 500;
}

/* CSS Wheel for non-JS / base styles */
.rotating-text-wrapper {
    display: inline-flex;
    height: 4.5rem; /* Match roughly with word height */
    overflow: hidden;
    position: relative;
    vertical-align: bottom;
    color: var(--primary);
    font-weight: 700;
    min-width: 380px; /* Longest word space */
    text-align: left;
}

.rotating-text {
    display: flex;
    flex-direction: column;
    animation: rotate 18s cubic-bezier(0.2, 0, 0.2, 1) infinite;
}

.word {
    height: 4.5rem;
    line-height: 4.5rem;
    display: flex;
    align-items: center;
}

/* 4 words: 0 to 3 transitions */
@keyframes rotate {
    0%, 11.11% { transform: translateY(0); }
    16.66%, 27.77% { transform: translateY(-4.5rem); }
    33.33%, 44.44% { transform: translateY(-9rem); }
    50%, 61.11% { transform: translateY(-13.5rem); }
    66.66%, 77.77% { transform: translateY(-18rem); }
    83.33%, 94.44% { transform: translateY(-22.5rem); }
    100% { transform: translateY(-27rem); }
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Features Grid */
.features {
    padding: 64px 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
    margin-bottom: 32px; /* space between rows if multiple exist */
}

.feature-card {
    background-color: var(--surface);
    border-radius: 8px;
    padding: 32px;
    box-shadow: var(--shadow-1);
    transition: box-shadow var(--transition-speed), transform var(--transition-speed);
    position: relative;
    overflow: hidden;
    cursor: default;
    outline: none;
}

.feature-card:hover, .feature-card:focus-visible {
    box-shadow: var(--shadow-3);
    transform: translateY(-4px);
}

.feature-card:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Ripple effect container */
.ripple {
    position: absolute;
    border-radius: 50%;
    transform: scale(0);
    animation: ripple-animation 600ms linear;
    background-color: rgba(0, 0, 0, 0.08);
    pointer-events: none; /* Let clicks pass through */
}

@keyframes ripple-animation {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

.card-icon {
    width: 48px;
    height: 48px;
    color: var(--primary);
    margin-bottom: 16px;
}

.card-icon svg {
    width: 100%;
    height: 100%;
}

.card-diagram {
    margin-bottom: 16px;
    display: flex;
    justify-content: flex-start;
    align-items: center;
    min-height: 48px;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
}

.feature-card code {
    background-color: rgba(0, 0, 0, 0.05);
    padding: 2px 4px;
    border-radius: 4px;
    font-family: monospace;
    font-size: 0.9em;
    color: var(--primary-variant);
}

/* Footer */
.footer {
    background-color: #f5f5f5;
    padding: 32px 0;
    text-align: center;
    border-top: 1px solid rgba(0,0,0,0.12);
}

.footer .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.footer p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.footer-links a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-speed);
    padding: 8px 16px;
    border-radius: 4px;
    outline: none;
}

.footer-links a:hover, .footer-links a:focus-visible {
    color: var(--primary);
    background-color: rgba(255, 106, 0, 0.08); /* slight primary background */
}

.footer-links a:focus-visible {
    outline: 2px solid var(--primary);
}

.footer-links svg {
    width: 24px;
    height: 24px;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .hero {
        padding: 48px 0;
    }

    .hero-title {
        font-size: 2.25rem;
        flex-direction: column;
        gap: 0;
    }
    
    .rotating-text-wrapper {
        height: 3.5rem;
        min-width: unset;
        width: 100%;
        text-align: center;
        justify-content: center;
    }
    
    .rotating-text {
        align-items: center;
    }

    .word {
        height: 3.5rem;
        line-height: 3.5rem;
        justify-content: center;
    }
    
    @keyframes rotate {
        0%, 11.11% { transform: translateY(0); }
        16.66%, 27.77% { transform: translateY(-3.5rem); }
        33.33%, 44.44% { transform: translateY(-7rem); }
        50%, 61.11% { transform: translateY(-10.5rem); }
        66.66%, 77.77% { transform: translateY(-14rem); }
        83.33%, 94.44% { transform: translateY(-17.5rem); }
        100% { transform: translateY(-21rem); }
    }

    .features {
        padding: 48px 0;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }
}

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

.main-nav {
    display: flex;
    gap: 24px;
}

.main-nav a {
    color: var(--on-primary);
    text-decoration: none;
    font-weight: 500;
    opacity: 0.8;
    transition: opacity 0.2s ease;
}

.main-nav a:hover, .main-nav a.active {
    opacity: 1;
}


/* Comparison Tables */
.comparison-section {
    padding: 80px 0;
    background-color: var(--surface);
}

.table-container {
    overflow-x: auto;
    margin-bottom: 48px;
    box-shadow: var(--shadow-1);
    border-radius: 8px;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--surface);
    text-align: left;
}

.comparison-table th, .comparison-table td {
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
}

.comparison-table th {
    background-color: #f1f3f5;
    font-weight: 700;
    color: var(--text-primary);
}

.comparison-table tr:last-child td {
    border-bottom: none;
}

.comparison-table td.highlight {
    background-color: #f8fff9; /* very light green for Offscale col */
    font-weight: 500;
}

.comparison-table th.highlight {
    background-color: #e6fced;
    color: var(--primary);
}

.check-yes { color: #3fb950; font-weight: bold; }
.check-no { color: #cf222e; }
.check-partial { color: #d29922; }


/* Dark Theme Variables */
[data-theme="dark"] {
    --background: #121212;
    --surface: #1e1e1e;
    --on-background: #e0e0e0;
    --on-surface: #e0e0e0;
    --text-primary: rgba(255, 255, 255, 0.87);
    --text-secondary: rgba(255, 255, 255, 0.60);
    --shadow-1: 0 1px 3px rgba(0,0,0,0.5), 0 1px 2px rgba(0,0,0,0.5);
    --border: #333;
    --section-alt: #161616;
}

[data-theme="dark"] body {
    background-color: var(--background);
    color: var(--text-primary);
}

[data-theme="dark"] .comparison-table th { background-color: #2a2a2a; color: var(--text-primary); }
[data-theme="dark"] .comparison-table td.highlight { background-color: #1a2a1e; }
[data-theme="dark"] .comparison-table th.highlight { background-color: #1e3a24; }

[data-theme="dark"] .hero-pipeline { background-color: var(--background); }
[data-theme="dark"] .hero-pipeline .hero-title .static-text { color: var(--text-primary); }
[data-theme="dark"] .hero-pipeline .hero-subtitle { color: var(--text-secondary); }

/* SVG Theme Fixes */
[data-theme="dark"] .flowchart text { fill: #e0e0e0 !important; }
[data-theme="dark"] .flowchart .node rect, [data-theme="dark"] .flowchart .node circle, [data-theme="dark"] .flowchart .node polygon { fill: #2c1a0c !important; }

/* Transitions */
body, .feature-card, .comparison-section, .comparison-table th, .comparison-table td, section {
    transition: background-color 0.3s ease, color 0.3s ease;
}


.hero-pipeline a:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(255, 106, 0, 0.35) !important;
}


/* SVG Theme Overrides */
[data-theme="dark"] svg.inline-svg rect,
[data-theme="dark"] svg.inline-svg circle,
[data-theme="dark"] svg.inline-svg polygon,
[data-theme="dark"] svg.inline-svg path.node-bkg {
    fill: #2c1a0c !important;
    stroke: #ff6a00 !important;
}

[data-theme="dark"] svg.inline-svg text,
[data-theme="dark"] svg.inline-svg span {
    fill: #e0e0e0 !important;
    color: #e0e0e0 !important;
}

[data-theme="dark"] svg.inline-svg .cluster rect {
    fill: #1a1a1a !important;
    stroke: #555 !important;
}

[data-theme="dark"] svg.inline-svg .edgePath .path,
[data-theme="dark"] svg.inline-svg .edge-pattern-solid {
    stroke: #ff6a00 !important;
}

[data-theme="dark"] svg.inline-svg .labelBkg {
    fill: #1a1a1a !important;
    background-color: #1a1a1a !important;
}


[data-theme="dark"] .footer {
    background-color: #121212;
    border-top: 1px solid #333;
}


/* General Focus Outline for Accessibility */
:focus-visible {
    outline: 3px solid var(--primary);
    outline-offset: 4px;
}
[data-theme='dark'] :focus-visible {
    outline-color: #ff914d;
}


}


/* Popover CSS replacing JS Modal */
.custom-popover {
    background-color: var(--surface);
    color: var(--text-primary);
    padding: 32px;
    border-radius: 8px;
    width: 90%;
    max-width: 500px;
    box-shadow: var(--shadow-3);
    border: none;
    margin: auto;
}

/* The ::backdrop pseudo-element lets us style the background */
.custom-popover::backdrop {
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(2px);
}

.popover-title {
    margin-top: 0;
    margin-bottom: 16px;
    font-size: 1.5rem;
}

.popover-body {
    margin-bottom: 24px;
    font-size: 1.1rem;
    line-height: 1.5;
}

.popover-button {
    background-color: var(--primary);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s ease;
    display: block;
    margin-left: auto;
}

.popover-button:hover {
    background-color: var(--primary-variant);
}