:root {
    /* Color Palette */
    --bg-light: #f8f9fa;
    --bg-dark: #0f1115;
    
    --text-light: #1a1a1a;
    --text-dark: #e0e0e0;
    
    --muted-light: #595959;
    --muted-dark: #a0a0a0;

    --primary-hue: 25; /* Warm Orange/Clay */
    --accent-light: hsl(var(--primary-hue), 60%, 65%);
    --accent-dark: hsl(var(--primary-hue), 70%, 70%);
    
    --card-bg-light: rgba(255, 255, 255, 0.7);
    --card-bg-dark: rgba(20, 20, 25, 0.6);
    
    --border-light: rgba(0, 0, 0, 0.08);
    --border-dark: rgba(255, 255, 255, 0.1);

    /* Fonts */
    --font-heading: 'Merriweather', serif;
    --font-body: 'Noto Serif', serif;
    --font-logo: 'Montserrat', sans-serif;

    /* Spacing & Layout */
    --container-width: 1200px;
    --header-height: 80px;
    
    /* Animation */
    --transition-speed: 0.4s;
    --ease-out-expo: cubic-bezier(0.19, 1, 0.22, 1);
}

[data-theme="dark"] {
    --bg-color: var(--bg-dark);
    --text-color: var(--text-dark);
    --text-muted: var(--muted-dark);
    --accent-color: var(--accent-dark);
    --card-bg: var(--card-bg-dark);
    --border-color: var(--border-dark);
    --shadow: 0 10px 40px -10px rgba(0, 0, 0, 0.5);
    --footer-bg: rgba(20, 20, 25, 0.8);
}

:root:not([data-theme="dark"]) {
    --bg-color: var(--bg-light);
    --text-color: var(--text-light);
    --text-muted: var(--muted-light);
    --accent-color: var(--accent-light);
    --card-bg: var(--card-bg-light);
    --border-color: var(--border-light);
    --shadow: 0 10px 40px -10px rgba(31, 38, 135, 0.15);
    --footer-bg: rgba(248, 249, 250, 0.8);
}

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

html {
    scroll-behavior: smooth;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-color);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 5px;
    border: 2px solid var(--bg-color);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-color);
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(210, 157, 120, 0.05) 0%, transparent 20%),
        radial-gradient(circle at 90% 80%, rgba(156, 65, 61, 0.05) 0%, transparent 20%);
}

/* Scroll Animation Helper Classes */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s var(--ease-out-expo);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Staggered Delay for Grid Items */
.reveal:nth-child(2) { transition-delay: 0.1s; }
.reveal:nth-child(3) { transition-delay: 0.2s; }
.reveal:nth-child(4) { transition-delay: 0.3s; }

/* Typography Enhancements */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--text-color);
    line-height: 1.2;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-speed) ease;
}

/* Accessibility Focus States */
:focus-visible {
    outline: 2px solid var(--accent-color);
    outline-offset: 4px;
}

/* Header */
header {
    height: var(--header-height);
    padding: 0 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent;
    transition: all var(--transition-speed) var(--ease-out-expo);
}

header.scrolled {
    background-color: var(--footer-bg);
    border-bottom-color: var(--border-color);
    height: 70px;
}

.brand {
    display: flex;
    align-items: center;
}

/* Brand Hover Effect */
.brand:hover .brand-text {
    transform: scale(1.02);
    filter: drop-shadow(0 0 15px var(--accent-color));
}

.brand-text {
    height: 40px;
    width: auto;
    image-rendering: -webkit-optimize-contrast;
    transition: all 0.5s var(--ease-out-expo);
}

[data-theme="dark"] .brand-text {
    filter: invert(1) brightness(1.5);
}

/* Navigation */
nav {
    display: flex;
    gap: 2rem;
    align-items: center;
}

nav a {
    font-size: 1rem;
    font-weight: 500;
    position: relative;
    padding: 0.5rem 0;
}

nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent-color);
    transition: width var(--transition-speed) ease;
}

nav a:hover::after,
nav a.active::after {
    width: 100%;
}

/* Controls (Theme/Lang) */
.controls {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding-left: 2rem;
    border-left: 1px solid var(--border-color);
}

.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    color: var(--text-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color var(--transition-speed);
}

.theme-toggle:hover {
    background-color: var(--border-color);
}

.icon {
    width: 20px;
    height: 20px;
    stroke-width: 2;
}

select#language-selector {
    background: transparent;
    color: var(--text-color);
    border: 1px solid var(--border-color);
    padding: 0.4rem 0.8rem;
    border-radius: 8px;
    font-family: var(--font-body);
    font-size: 0.9rem;
    cursor: pointer;
    transition: border-color var(--transition-speed);
}

select#language-selector:hover {
    border-color: var(--accent-color);
}

select#language-selector option {
    background-color: var(--bg-color);
    color: var(--text-color);
}

/* Main Content */
main {
    flex: 1;
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    flex-direction: column;
}

/* Hero Section */
.hero-container {
    padding: 180px 0 120px;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-container h1 {
    font-family: var(--font-heading);
    font-size: clamp(3rem, 6vw, 4.5rem);
    font-weight: 400; /* Serif elegance */
    line-height: 1.1;
    margin-bottom: 2rem;
    letter-spacing: -0.03em;
    color: var(--text-color); /* Solid color, no gradient */
    animation: fadeInUp 1.2s var(--ease-out-expo);
}

.description {
    font-family: var(--font-body);
    font-size: clamp(1.2rem, 2vw, 1.4rem);
    color: var(--muted-light); /* Softer text */
    margin-bottom: 3.5rem;
    line-height: 1.8;
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 1.2s var(--ease-out-expo) 0.2s backwards;
}

.cta-button {
    display: inline-block;
    padding: 1rem 2.5rem;
    background-color: var(--accent-color); /* Use accent */
    color: #fff; /* White text on accent */
    font-family: var(--font-logo);
    font-weight: 600;
    font-size: 1rem;
    text-transform: none; /* No uppercase */
    letter-spacing: 0.5px;
    border-radius: 8px; /* Slightly rounded, not full pill */
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    animation: fadeInUp 1.2s var(--ease-out-expo) 0.4s backwards;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.2);
    background-color: var(--text-color); /* Dark on hover */
    color: var(--bg-color);
}

/* Features Section */
.features-section {
    padding: 100px 0;
}

.section-title {
    text-align: left; /* Editorial alignment */
    font-family: var(--font-heading);
    font-size: clamp(2rem, 4vw, 2.5rem);
    margin-bottom: 60px;
    font-weight: 400;
    letter-spacing: -0.02em;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 20px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

/* Structured Cards */
.feature-card {
    background: var(--card-bg);
    padding: 3rem 2rem;
    border-radius: 12px; /* Tighter radius */
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
    /* Removed backdrop-filter for solid paper look */
    transition: all 0.4s ease;
    text-align: left; /* Left align */
    display: flex;
    flex-direction: column;
    align-items: flex-start; /* Align start */
    gap: 1.5rem;
    height: 100%;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-color);
    box-shadow: 0 12px 30px rgba(0,0,0,0.08);
}

.feature-icon {
    width: 50px; /* Smaller, more refined */
    height: 50px;
    background: transparent; /* No background */
    border-radius: 0;
    display: flex;
    align-items: center;
    justify-content: flex-start; /* Align start */
    padding: 0;
    transition: all 0.5s var(--ease-out-expo);
    margin-bottom: 0.5rem;
}

.feature-card:hover .feature-icon {
    transform: none; /* No rotation */
    box-shadow: none;
}

.feature-icon img {
    width: 100%;
    height: 100%;
    /* Adapt icon color to text color via filter or keep original if suitable */
    filter: sepia(100%) hue-rotate(-50deg) saturate(600%) brightness(0.7); /* Warm brown/orange filter approximation */
}

[data-theme="dark"] .feature-icon img {
    filter: invert(1) brightness(0.9);
}

.feature-card h3 {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 0.2rem;
    color: var(--text-color);
}

.feature-card p {
    color: var(--text-muted);
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.6;
}

/* Footer Improvements */
footer {
    border-top: 1px solid var(--border-color);
    padding: 100px 5% 60px;
    background-color: var(--footer-bg);
    backdrop-filter: blur(20px);
    margin-top: 80px;
}

.footer-content {
    max-width: var(--container-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 60px;
}

.footer-brand .brand-logo-full {
    margin-bottom: 2rem;
    display: block;
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 1.1rem;
    line-height: 1.8;
    max-width: 300px;
    margin-bottom: 2rem;
}

.footer-column h4 {
    font-family: var(--font-logo);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: 2.5rem;
    color: var(--accent-color);
    font-weight: 700;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.footer-links a {
    color: var(--text-muted);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.footer-links a:hover {
    color: var(--text-color);
    transform: translateX(8px);
}

.footer-social {
    display: flex;
    gap: 2rem;
}

.footer-social img {
    opacity: 0.6;
    transition: all 0.3s ease;
}

.footer-social a:hover img {
    opacity: 1;
    transform: scale(1.2);
}

.footer-bottom {
    max-width: var(--container-width);
    margin: 80px auto 0;
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive */
@media (max-width: 1200px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }
}

@media (max-width: 1024px) {
    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    main {
        padding: 2rem 1.5rem;
        gap: 4rem;
    }
    
    .hero-container {
        padding: 120px 0 60px;
    }

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

    .footer-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 1.5rem;
        text-align: center;
    }
}

/* Theme Icon Toggling */
.sun-icon {
    display: none;
}
.moon-icon {
    display: block;
}

[data-theme="dark"] .sun-icon {
    display: block;
}

[data-theme="dark"] .moon-icon {
    display: none;
}