/* site.css — Shared layout for all pages on Naraku's RPGs
   Accessibility: Web Accessibility Cookbook (O'Reilly)
   Security:      Web Application Security 2nd Ed (O'Reilly)  */

/* ---- Reset ---- */
* { box-sizing: border-box; }

/* ---- Visually-hidden utility (Web Accessibility Cookbook, ch. 8)
   Clip-path technique — visible to screen readers, hidden visually.
   Becomes visible on :focus/:active (used by skip-link). ---- */
.visually-hidden:not(:focus):not(:active),
.skip-link:not(:focus):not(:active) {
    clip-path: inset(50%);
    height: 1px;
    overflow: hidden;
    position: absolute;
    white-space: nowrap;
    width: 1px;
}

/* ---- Skip-to-content (Web Accessibility Cookbook, ch. 5) ---- */
.skip-link {
    background: var(--accent-green);
    color: var(--bg-color);
    padding: 8px 16px;
    z-index: 9999;
    font-family: 'Roboto', sans-serif;
    font-weight: 700;
    text-decoration: none;
    border-radius: 0 0 5px 0;
    position: absolute;
    top: 0;
    left: 0;
}

/* ---- Body ---- */
body {
    font-family: 'Roboto', sans-serif;
    background: var(--body-gradient);
    margin: 0;
    padding: 0;
    min-height: 100vh;
    color: var(--text-light);
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* ---- Header ---- */
header {
    background: var(--dark-panel);
    width: 100%;
    padding: 15px 20px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
}

/* Nav list — list-style-type: "" preserves semantics in Safari/VoiceOver
   (Web Accessibility Cookbook, ch. 1) */
header nav ul {
    list-style-type: "";
    padding: 0;
    margin: 0;
    display: flex;
    gap: 30px;
}

header nav ul li a {
    text-decoration: none;
    color: var(--text-light);
    font-family: 'Orbitron', sans-serif;
    font-size: 1em;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding-bottom: 4px;
    border-bottom: 2px solid transparent;
}

/* Hover and active nav link — underline for non-color-only indication
   (Web Accessibility Cookbook, ch. 3) */
header nav ul li a:hover {
    color: var(--accent-green);
    text-shadow: 0 0 8px rgba(var(--accent-green-rgb), 0.6);
    border-bottom-color: var(--accent-green);
}

/* aria-current="page" (Web Accessibility Cookbook, ch. 2) — screen readers
   announce "current page"; also drives visual indicator */
header nav ul li a[aria-current="page"] {
    color: var(--accent-green);
    text-shadow: 0 0 8px rgba(var(--accent-green-rgb), 0.6);
    border-bottom: 2px solid var(--accent-green);
}

/* ---- Theme Switcher ---- */
.theme-switcher {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9em;
    color: var(--text-light);
    font-family: 'Roboto', sans-serif;
}

.theme-switcher label {
    font-weight: 700;
}

.theme-switcher select {
    padding: 5px 10px;
    border-radius: 5px;
    border: 1px solid var(--dark-panel-alt);
    background-color: var(--dark-panel);
    color: var(--text-light);
    font-family: 'Roboto', sans-serif;
    cursor: pointer;
}

/* ---- Main Content ---- */
main {
    flex-grow: 1;
    width: 100%;
    padding: 0 20px;
    text-align: center;
}

.main-title {
    font-family: 'Orbitron', sans-serif;
    color: var(--accent-green);
    margin-bottom: 50px;
    font-size: 3em;
    text-transform: uppercase;
    letter-spacing: 3px;
    text-shadow: 0 0 15px rgba(var(--accent-green-rgb), 0.8);
}

/* ---- Preview Grid / Cards ---- */
.preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(var(--preview-card-min, 280px), 1fr));
    gap: 30px;
    margin-bottom: 50px;
}

.preview-card {
    background: var(--dark-panel);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    border: 2px solid rgba(var(--accent-purple-rgb), 0.3);
    display: flex;
    flex-direction: column;
    cursor: pointer;
    position: relative; /* for card-link ::after overlay */
}

.preview-card.disabled {
    cursor: default;
}

.preview-image {
    width: 100%;
    height: 220px;
    object-fit: cover;
    border-bottom: 3px solid var(--accent-green);
}

.preview-content {
    padding: 20px;
    text-align: left;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.preview-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.3em;
    margin-top: 0;
    margin-bottom: 10px;
    color: var(--accent-green);
    text-shadow: 0 0 5px rgba(var(--accent-green-rgb), 0.4);
}

.preview-description {
    font-size: 0.95em;
    color: var(--text-subtle);
    margin-bottom: 20px;
    flex-grow: 1;
}

.preview-link {
    display: block;
    width: calc(100% - 40px);
    margin: 0 auto;
    text-decoration: none;
    color: var(--button-text-default);
    background-color: var(--accent-green);
    padding: 12px 25px;
    border-radius: 5px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    font-family: 'Orbitron', sans-serif;
    text-align: center;
    border: none;
}

.preview-link:hover {
    background-color: var(--accent-purple);
    color: var(--button-text-hover);
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.3), 0 0 15px rgba(var(--accent-purple-rgb), 0.7);
}

.preview-link.coming-soon {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* ---- Footer ---- */
footer {
    width: 100%;
    padding: 20px;
    background: var(--dark-panel);
    color: var(--text-subtle);
    text-align: center;
    margin-top: 40px;
    font-size: 0.9em;
}

/* ---- Focus-visible (Web Accessibility Cookbook, ch. 8)
   Use outline (not box-shadow alone) so it remains visible in
   Windows forced-colors / high-contrast mode.
   Combine with transparent outline for forced-colors fallback. ---- */
a:focus-visible,
button:focus-visible,
select:focus-visible,
input:focus-visible {
    outline: 0.25em solid var(--accent-green);
    outline-offset: 0.25em;
}

/* Remove the default outline override on select focus —
   let focus-visible handle it */
.theme-switcher select:focus-visible {
    border-color: var(--accent-green);
    box-shadow: 0 0 5px rgba(var(--accent-green-rgb), 0.5);
}

.preview-card:focus-within {
    outline: 0.25em solid var(--accent-green);
    outline-offset: 0.25em;
}

/* ---- Ko-fi Widget ---- */
#kofi-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1000;
}

/* ---- Back Link ---- */
.back-link {
    text-align: center;
    margin-top: 30px;
    margin-bottom: 30px;
}

.back-link a {
    color: var(--text-light);
    text-decoration: underline;
    text-decoration-color: transparent;
    font-family: 'Orbitron', sans-serif;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.back-link a:hover {
    color: var(--accent-green);
    text-decoration-color: var(--accent-green);
    text-shadow: 0 0 8px rgba(var(--accent-green-rgb), 0.6);
}

/* ---- Reduced motion (Web Accessibility Cookbook, ch. 10)
   Animations only play when the user has NOT requested reduced motion. ---- */
@media (prefers-reduced-motion: no-preference) {
    body {
        transition: background-color 0.5s ease, color 0.5s ease;
    }
    .preview-card {
        transition: transform 0.3s ease, box-shadow 0.3s ease,
                    background-color 0.3s ease, border-color 0.3s ease;
    }
    .preview-card:hover {
        transform: translateY(-8px);
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.5),
                    0 0 20px rgba(var(--accent-purple-rgb), 0.5);
    }
    .preview-card.disabled:hover {
        transform: none;
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    }
    .preview-link {
        transition: all 0.3s ease;
    }
    .preview-link:hover {
        transform: translateY(-3px);
    }
    header nav ul li a {
        transition: color 0.3s ease, text-shadow 0.3s ease,
                    border-bottom-color 0.3s ease;
    }
    .back-link a {
        transition: color 0.3s ease, text-shadow 0.3s ease,
                    text-decoration-color 0.3s ease;
    }
}

/* ---- High contrast (Web Accessibility Cookbook, ch. 3) ---- */
@media (prefers-contrast: more) {
    :root {
        --text-subtle: #d0d0d0;
    }
    body.theme-rpg {
        --text-subtle: #3a2a1a;
    }
}

/* ---- Forced colors / Windows high-contrast mode (Web Accessibility Cookbook, ch. 3)
   Transparent outlines become visible; box-shadows do not. ---- */
@media (forced-colors: active) {
    .preview-card {
        border: 2px solid ButtonText;
    }
    .preview-link {
        border: 1px solid ButtonText;
    }
    a:focus-visible,
    button:focus-visible,
    select:focus-visible {
        outline: 2px solid Highlight;
    }
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
    header {
        flex-direction: column;
        gap: 15px;
    }
    header nav ul {
        gap: 20px;
        justify-content: center;
        flex-wrap: wrap;
    }
    .main-title {
        font-size: 2em;
        margin-bottom: 30px;
    }
    .preview-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 20px;
    }
    .preview-image {
        height: 180px;
    }
    .preview-link {
        width: calc(100% - 30px);
        padding: 10px 20px;
    }
    #kofi-container {
        bottom: 10px;
        right: 10px;
    }
    .theme-switcher {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .main-title {
        font-size: 1.8em;
        letter-spacing: 2px;
    }
    header {
        padding: 10px;
        gap: 10px;
    }
    header nav ul {
        gap: 15px;
    }
    header nav ul li a {
        font-size: 0.9em;
        letter-spacing: 0.5px;
    }
    .preview-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .preview-image {
        height: 160px;
    }
    .preview-content {
        padding: 15px;
    }
    .preview-link {
        width: calc(100% - 20px);
        padding: 8px 15px;
        font-size: 0.9em;
        letter-spacing: 1px;
    }
}