/*
 * CSS Variables setup for theme management
 * Refined color palette: Slate & Crimson
 */
:root {
    --bg-color: #f1f5f9; /* Soft Slate-Grey Background */
    --text-color: #1e293b;
    --secondary-text-color: #475569;
    --card-bg-color: #f8fafc; /* Off-white for cards to reduce glare */
    --border-color: #cbd5e1;
    --accent-color: #be123c; /* Muted Crimson */
    --button-bg: #e2e8f0;
    --button-hover-bg: #cbd5e1;
    --table-header-bg: #334155; /* Slate Blue-Grey */
    --link-color: #0369a1; /* Deep Cerulean */
}

/* Dark Mode Overrides */
.dark-mode {
    --bg-color: #0f172a;
    --text-color: #f1f5f9;
    --secondary-text-color: #94a3b8;
    --card-bg-color: #1e293b;
    --border-color: #334155;
    --accent-color: #fb7185; /* Soft Rose */
    --button-bg: #334155;
    --button-hover-bg: #475569;
    --table-header-bg: #111827;
    --link-color: #38bdf8; /* Soft Sky Blue */
}

/* General Reset and Body Styling */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Montserrat', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
    min-height: 100vh;
}

/* Header Styling */
.landing-header {
    position: relative;
    text-align: center;
    padding: 80px 20px 50px;
    background-color: var(--card-bg-color);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.site-title {
    font-size: clamp(2rem, 5vw, 2.75rem);
    color: var(--accent-color);
    margin-bottom: 0.3em;
    font-weight: 700;
    letter-spacing: -0.025em;
}

.site-description {
    font-size: 1.1rem;
    color: var(--secondary-text-color);
    max-width: 650px;
    margin: 0 auto;
}

/* Theme Toggle Styling */
.icon-button {
    position: absolute;
    top: 24px;
    right: 24px;
    background-color: var(--button-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 12px;
    border-radius: 10px; /* Slightly squircle for modern look */
    cursor: pointer;
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.icon-button:hover {
    background-color: var(--button-hover-bg);
    border-color: var(--secondary-text-color);
    transform: translateY(-1px);
}

.icon-button i {
    font-size: 1.1rem;
}

/* Main Content Layout */
.container {
    width: 100%;
    max-width: 1100px;
    margin: 40px auto;
    padding: 0 24px;
}

.content-section {
    background-color: var(--card-bg-color);
    padding: 40px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.04);
    transition: background-color 0.3s ease;
}

.content-section h2 {
    color: var(--text-color);
    font-size: 1.5rem;
    margin-bottom: 24px;
    font-weight: 600;
}

.content-intro {
    margin-bottom: 32px;
    color: var(--secondary-text-color);
    font-size: 1rem;
}

/* Table Styling */
.version-table-wrapper {
    overflow-x: auto;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    background-color: var(--card-bg-color);
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead tr {
    background-color: var(--table-header-bg);
    color: #ffffff;
}

th,
td {
    text-align: left;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
}

th {
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    color: #cbd5e1; /* Light slate text for header */
}

/* Zebra striping */
tbody tr:nth-child(even) {
    background-color: rgba(0, 0, 0, 0.03);
}

.dark-mode tbody tr:nth-child(even) {
    background-color: rgba(255, 255, 255, 0.02);
}

/* Hover effect */
tbody tr:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

.dark-mode tbody tr:hover {
    background-color: rgba(255, 255, 255, 0.04);
}

/* Link Styling */
a {
    color: var(--link-color);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s;
    padding: 2px 4px;
    margin: -2px -4px;
    border-radius: 4px;
}

a:hover {
    background-color: rgba(var(--link-color), 0.1);
    color: var(--accent-color);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .landing-header {
        padding: 90px 20px 40px;
    }

    .icon-button {
        top: 20px;
        right: 20px;
    }

    .content-section {
        padding: 24px 16px;
    }

    .container {
        margin: 24px auto;
    }

    th, td {
        padding: 12px 14px;
        font-size: 0.9rem;
    }
}