/* style.css */
:root {
    /* Light Theme - Coffee-house calm */
    --bg-color: #fdfbf7; /* Cream */
    --text-color: #2c1e16; /* Espresso Brown */
    --text-muted: #5c4e46;
    --accent-color: #6b705c; /* Muted Olive */
    --accent-hover: #565a4a;
    --surface-color: #f4f0ea;
    --surface-border: #e0d7cb;
    --focus-ring: #6b705c;
    --error-color: #9d3a3a;

    /* System Font Stacks */
    --font-serif: Georgia, "Times New Roman", Times, serif;
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

    /* Layout */
    --container-width: 800px;
}

@media (prefers-color-scheme: dark) {
    :root {
        /* Dark Theme */
        --bg-color: #1f1612; /* Dark Espresso */
        --text-color: #ebd9c8; /* Warm Cream */
        --text-muted: #a69b92;
        --accent-color: #8a9a7a; /* Lighter Muted Olive */
        --accent-hover: #9eaf8c;
        --surface-color: #2c1e16;
        --surface-border: #4a362a;
        --focus-ring: #8a9a7a;
        --error-color: #d27979;
    }
}

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

body {
    font-family: var(--font-serif);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    font-size: 18px;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-sans);
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 1rem;
    color: var(--text-color);
}

h1 { font-size: 2.5rem; margin-top: 2rem; margin-bottom: 1.5rem; text-align: center; }
h2 { font-size: 1.8rem; margin-top: 2.5rem; border-bottom: 1px solid var(--surface-border); padding-bottom: 0.5rem; }
h3 { font-size: 1.4rem; margin-top: 2rem; }

p, ul, ol {
    margin-bottom: 1.5rem;
}

ul, ol {
    padding-left: 2rem;
}

li {
    margin-bottom: 0.5rem;
}

a {
    color: var(--accent-color);
    text-decoration: underline;
    text-underline-offset: 3px;
    transition: color 0.2s ease;
}

a:hover, a:focus {
    color: var(--accent-hover);
}

/* Focus styles for accessibility */
*:focus-visible {
    outline: 2px solid var(--focus-ring);
    outline-offset: 4px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Layout */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

header {
    padding: 2rem 0;
    text-align: center;
    border-bottom: 1px solid var(--surface-border);
    margin-bottom: 2rem;
}

.site-title {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    margin: 0;
    color: var(--text-color);
    text-decoration: none;
}

.site-subtitle {
    font-family: var(--font-sans);
    font-size: 1rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 0.5rem;
}

nav {
    margin-top: 1.5rem;
}

nav ul {
    list-style: none;
    padding: 0;
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

nav a {
    font-family: var(--font-sans);
    text-decoration: none;
    font-weight: 500;
}

main {
    min-height: 60vh;
}

footer {
    margin-top: 4rem;
    padding: 2rem 0;
    border-top: 1px solid var(--surface-border);
    text-align: center;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    color: var(--text-muted);
}

footer p {
    margin-bottom: 0.5rem;
}

footer nav ul {
    gap: 1rem;
}

/* Interactive Component: Scenario Selector */
.scenario-selector {
    background-color: var(--surface-color);
    border: 1px solid var(--surface-border);
    border-radius: 8px;
    padding: 2rem;
    margin: 2.5rem 0;
}

.scenario-selector h3 {
    margin-top: 0;
    text-align: center;
}

.scenario-controls {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.scenario-controls label {
    font-family: var(--font-sans);
    font-weight: 500;
}

.scenario-controls select {
    width: 100%;
    padding: 0.75rem;
    font-family: var(--font-sans);
    font-size: 1rem;
    background-color: var(--bg-color);
    color: var(--text-color);
    border: 1px solid var(--surface-border);
    border-radius: 4px;
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
}

.scenario-controls select:focus {
    outline: 2px solid var(--focus-ring);
    border-color: var(--focus-ring);
}

/* For dark mode select arrows */
@media (prefers-color-scheme: dark) {
    .scenario-controls select {
        background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23ebd9c8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    }
}

.scenario-result {
    padding: 1.5rem;
    background-color: var(--bg-color);
    border-left: 4px solid var(--accent-color);
    border-radius: 0 4px 4px 0;
    min-height: 100px;
}

.scenario-result p:last-child {
    margin-bottom: 0;
}

/* Age Gate Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.85);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 1;
    transition: opacity 0.3s ease;
}

.modal-overlay[aria-hidden="true"] {
    opacity: 0;
    pointer-events: none;
}

body.modal-open {
    overflow: hidden;
}

.modal {
    background-color: var(--surface-color);
    padding: 3rem 2rem;
    border-radius: 8px;
    max-width: 500px;
    width: 90%;
    text-align: center;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
    border: 1px solid var(--surface-border);
}

.modal h2 {
    margin-top: 0;
}

.modal-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}

button {
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 1rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.1s ease;
}

button:active {
    transform: translateY(1px);
}

.btn-primary {
    background-color: var(--accent-color);
    color: #fdfbf7;
}

.btn-primary:hover, .btn-primary:focus {
    background-color: var(--accent-hover);
}

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

.btn-secondary:hover, .btn-secondary:focus {
    background-color: var(--surface-border);
}

.error-message {
    color: var(--error-color);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    margin-top: 1rem;
    min-height: 1.5em;
}

/* Callout Boxes */
.callout {
    background-color: var(--surface-color);
    border-radius: 4px;
    padding: 1.5rem;
    margin: 2rem 0;
}

.callout h3 {
    margin-top: 0;
}

.callout.warning {
    border-left: 4px solid var(--error-color);
}

.callout.info {
    border-left: 4px solid var(--accent-color);
}

/* Utility */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Table styles */
table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1.5rem;
    font-family: var(--font-sans);
}

th, td {
    padding: 0.75rem;
    border-bottom: 1px solid var(--surface-border);
    text-align: left;
}

th {
    font-weight: 600;
    background-color: var(--surface-color);
}