/* Boiled Ocean - Architected Intent */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600&family=JetBrains+Mono:wght@400;700&display=swap');

:root {
    --bg-color: #050505;
    --text-primary: #f0f0f0;
    --text-secondary: #a0a0a0;
    --accent-color: #00f0ff;
    /* Cyan for schematic feel */
    --border-color: #333;
    --grid-color: rgba(255, 255, 255, 0.03);
    --font-mono: 'JetBrains Mono', monospace;
    --font-sans: 'Inter', sans-serif;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    overflow-x: hidden;
    /* Blueprint Grid Background */
    background-image:
        linear-gradient(var(--grid-color) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
    background-size: 40px 40px;
}

/* Typography Utilities */
.mono {
    font-family: var(--font-mono);
}

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

h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 600;
    letter-spacing: -0.02em;
}

h1 {
    font-size: 3.5rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    border-left: 4px solid var(--accent-color);
    padding-left: 1rem;
}

p {
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
    max-width: 65ch;
    font-size: 1.125rem;
}

strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* Layout */
.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 2rem;
}

section {
    padding: 6rem 0;
    border-bottom: 1px solid var(--border-color);
    position: relative;
}

section::before {
    /* Section Marker */
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 1px;
    background: var(--border-color);
    display: none;
    /* Only show on wide screens if needed, or keep simple */
}

/* Components */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    background: transparent;
    border: 1px solid var(--accent-color);
    color: var(--accent-color);
    font-family: var(--font-mono);
    text-transform: uppercase;
    text-decoration: none;
    font-weight: 700;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn:hover {
    background: var(--accent-color);
    color: var(--bg-color);
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.3);
}

.input-group {
    margin-top: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

input[type="text"],
textarea {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    padding: 1rem;
    color: var(--text-primary);
    font-family: var(--font-mono);
    width: 100%;
    max-width: 500px;
}

input[type="text"]:focus,
textarea:focus {
    outline: none;
    border-color: var(--accent-color);
}

/* Specific Sections */
.hero {
    min-height: 90vh;
    display: flex;
    align-items: center;
    padding-top: 0;
}

.hero-content {
    border: 1px solid var(--border-color);
    padding: 3rem;
    background: rgba(5, 5, 5, 0.8);
    backdrop-filter: blur(5px);
    position: relative;
}

.hero-content::after {
    /* Corner accent */
    content: '';
    position: absolute;
    top: -1px;
    right: -1px;
    width: 20px;
    height: 20px;
    border-top: 2px solid var(--accent-color);
    border-right: 2px solid var(--accent-color);
}

.comparison-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-top: 3rem;
}

.comparison-item {
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.02);
}

.comparison-item h3 {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.principal-card {
    border: 1px solid var(--border-color);
    padding: 2rem;
    margin-top: 2rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.footer {
    padding: 3rem 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

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

    .principal-card {
        flex-direction: row;
        align-items: flex-start;
    }

    h1 {
        font-size: 4.5rem;
    }
}

.principal-details {
    border-left: 1px solid var(--border-color);
    padding-left: 2rem;
    min-width: 300px;
}

.principal-list {
    list-style: none;
    color: var(--text-secondary);
}

.principal-list li {
    margin-bottom: 0.5rem;
}

.principal-list li:last-child {
    margin-bottom: 0;
}

@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
        /* Reduced from 3.5rem */
    }

    h2 {
        font-size: 2rem;
    }

    .container {
        padding: 0 1.5rem;
        /* Reduced from 2rem */
    }

    .hero-content {
        padding: 1.5rem;
        /* Reduced from 3rem */
    }

    .principal-details {
        border-left: none;
        border-top: 1px solid var(--border-color);
        padding-left: 0;
        padding-top: 2rem;
        min-width: auto;
        /* Remove fixed width */
    }
}