:root {
    /* Colors - Dark Gunmetal & Teal Theme */
    --color-bg-body: #1b2026;
    /* Dark Gunmetal */
    --color-bg-subtle: #232a31;
    /* Slightly lighter/different tone for contrast */
    --color-text-main: #ffffff;
    --color-text-muted: rgba(255, 255, 255, 0.85);

    --color-primary: #6dbfb8;
    /* Users Light Teal - High Contrast Accent for Buttons/Links */
    --color-accent: #008477;
    /* Users Dark Teal - Secondary Accent */

    --color-border: rgba(255, 255, 255, 0.2);

    /* Spacing */
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 2rem;
    --space-xl: 4rem;
    --container-max-width: 1200px;
}

/* Reset & Base */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--color-bg-body);
    color: var(--color-text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s ease;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

/* Utility / Layout */
.container {
    width: 90%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.section {
    padding: var(--space-xl) 0;
}

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

.mb-md {
    margin-bottom: var(--space-md);
}

.mb-lg {
    margin-bottom: var(--space-lg);
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    line-height: 1.2;
    font-weight: 700;
    margin-bottom: var(--space-md);
    letter-spacing: -0.02em;
    color: var(--color-text-main);
}

h1 {
    font-size: 3rem;
}

h2 {
    font-size: 2.25rem;
}

h3 {
    font-size: 1.5rem;
}

p {
    margin-bottom: var(--space-md);
    color: var(--color-text-muted);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.2s ease;
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-bg-body);
    /* Dark text on light teal button */
}

.btn-primary:hover {
    background-color: #ffffff;
    color: var(--color-primary);
    transform: translateY(-1px);
}

.btn-outline {
    border: 1px solid var(--color-text-main);
    background: transparent;
    color: var(--color-text-main);
}

.btn-outline:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: #ffffff;
    border-color: #ffffff;
}

/* Header & Nav */
header {
    padding: var(--space-md) 0;
    background-color: var(--color-bg-body);
    /* Match body */
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo {
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.03em;
    color: var(--color-text-main);
}

.nav-links {
    display: flex;
    gap: var(--space-md);
    align-items: center;
}

.nav-links a {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    font-weight: 500;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--color-primary);
}

/* Footer */
footer {
    background-color: var(--color-bg-subtle);
    padding: var(--space-xl) 0;
    border-top: 1px solid var(--color-border);
    margin-top: var(--space-xl);
}