:root {
    --nebula-color: rgba(0, 0, 0, 0);
    --accent-color: #ffd700;
    --panel-bg: rgba(10, 10, 10, 0.98);
    --star-trail-color: #ffffff;
    --vignette-opacity: 0.78;
    --disabled-opacity: 0.5;
    --disabled-filter: grayscale(0.3);
    --silver-text: #c0c0c0;
}

body, html {
    margin: 0; padding: 0;
    width: 100%; height: 100%;
    background-color: #000;
    overflow: hidden;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    user-select: none;
    cursor: default;
}

/* Darkness mode - hides non-persistent settings, but help content remains */
body.darkness-mode #config-menu .menu-body > *:not(.darkness-persist):not(.help-content) {
    display: none !important;
}
body.darkness-mode .help-content {
    display: block !important;
}
body.darkness-mode #sky-container,
body.darkness-mode #shooting-container,
body.darkness-mode #trail-canvas {
    display: none !important;
}
body.darkness-mode #config-menu {
    border-color: var(--accent-color);
}

#sky-container {
    position: fixed; inset: 0; z-index: 10; pointer-events: none;
}

#nebula, #nebula-secondary, #nebula-tertiary {
    transition: background 1.2s ease, opacity 0.4s;
}
#nebula {
    position: absolute; inset: 0;
    filter: blur(55px);
    opacity: 0.9;
}
#nebula-secondary {
    position: absolute; inset: 0;
    filter: blur(65px);
    opacity: 0.7;
}
#nebula-tertiary {
    position: absolute; inset: 0;
    filter: blur(70px);
    opacity: 0.6;
}

#vignette {
    position: absolute; inset: 0;
    background: radial-gradient(ellipse 60% 60% at 50% 50%, transparent 30%, rgba(0,0,0, var(--vignette-opacity)) 100%);
}

#layer-far, #layer-mid, #layer-near {
    position: absolute; inset: 0;
    transition: transform 0.08s linear;
    will-change: transform;
}

.star-wrapper {
    position: absolute;
    will-change: transform;
}
.star {
    border-radius: 50%;
    animation: twinkle var(--d) infinite ease-in-out;
}
@keyframes twinkle {
    0%, 100% { opacity: 0.3; transform: scale(0.8); }
    50%       { opacity: 1;   transform: scale(1.1); }
}

.star-chroma {
    animation: twinkle var(--d) infinite ease-in-out, chroma var(--chroma-dur) infinite alternate;
}
@keyframes chroma {
    from { box-shadow: -3px 0 5px rgba(255,60,60,var(--chroma-strength)), 3px 0 5px rgba(60,100,255,var(--chroma-strength)); }
    to   { box-shadow:  3px 0 5px rgba(255,60,60,var(--chroma-strength)), -3px 0 5px rgba(60,100,255,var(--chroma-strength)); }
}

.pulsar-wrapper {
    position: absolute;
    will-change: transform;
    pointer-events: none;
    transition: transform 0.08s linear;
}
.pulsar-star {
    width: 4px; height: 4px;
    background: #fff;
    border-radius: 50%;
    animation: pulseStar var(--pulse-dur) infinite ease-in-out;
    transform: translate(-50%, -50%);
}
@keyframes pulseStar {
    0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: var(--pulse-opacity); box-shadow: 0 0 var(--pulse-shadow) var(--pulse-spread) #fff; }
    50%       { transform: translate(-50%, -50%) scale(var(--pulse-scale)); opacity: var(--pulse-opacity-max); box-shadow: 0 0 var(--pulse-shadow-max) var(--pulse-spread-max) #fff; }
}

.dust {
    position: absolute;
    border-radius: 50%;
    animation: dustFloat var(--d) ease-in-out infinite alternate;
}
@keyframes dustFloat {
    from { transform: translate(0, 0); opacity: 0.15; }
    to   { transform: translate(var(--dx), var(--dy)); opacity: var(--dust-opacity); }
}

#aurora-container {
    position: absolute; inset: 0;
    overflow: hidden;
    z-index: 12;
}
.aurora-band {
    position: absolute;
    top: -5%;
    height: 50%;
    filter: blur(28px);
    opacity: 0;
    transform-origin: top center;
    animation: auroraWave var(--d) ease-in-out infinite alternate,
               auroraFade calc(var(--d) * 1.8) ease-in-out infinite;
}
@keyframes auroraWave {
    from { transform: scaleX(0.65) skewX(-6deg) translateY(0); }
    to   { transform: scaleX(1.35) skewX(6deg)  translateY(10%); }
}
@keyframes auroraFade {
    0%, 100% { opacity: 0; }
    25%, 75% { opacity: var(--ao); }
}

#shooting-container {
    position: fixed; inset: 0; z-index: 30; pointer-events: none;
}
.shooting-star {
    position: absolute;
    height: 2px;
    background: linear-gradient(to right, transparent, var(--star-trail-color), #fff);
    transform-origin: left center;
    box-shadow: 0 0 15px var(--star-trail-color);
    animation: shoot var(--d) linear forwards;
}
@keyframes shoot {
    0%   { transform: translate(0,0) rotate(var(--r)) scaleX(0); opacity: 0; }
    15%  { transform: translate(0,0) rotate(var(--r)) scaleX(1); opacity: 1; }
    100% { transform: translate(calc(var(--x)*1px), calc(var(--y)*1px)) rotate(var(--r)) scaleX(0.1); opacity: 0; }
}

#fog-container {
    position: absolute; inset: 0;
    overflow: hidden;
    z-index: 20;
}
.fog-band {
    position: absolute;
    height: 140px;
    border-radius: 50%;
    filter: blur(35px);
    animation: fogDrift var(--d) linear infinite;
    opacity: 0;
    background: radial-gradient(ellipse at center, rgba(160,180,240,0.9) 0%, transparent 70%);
}
@keyframes fogDrift {
    0%  { transform: translateX(-600px); opacity: 0; }
    8%  { opacity: var(--fo); }
    92% { opacity: var(--fo); }
    100%{ transform: translateX(calc(100vw + 600px)); opacity: 0; }
}

#menu-trigger {
    position: fixed; top: 0; right: 0;
    width: 60px; height: 60px;
    z-index: 999;
}
#config-menu {
    position: fixed; top: 15px; right: 15px; width: 380px;
    background: var(--panel-bg); border: 2px solid var(--accent-color);
    border-radius: 8px; color: #fff; z-index: 1000;
    opacity: 0; visibility: hidden;
    transition: opacity 0.2s ease, visibility 0.2s;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 0 30px rgba(0,0,0,1);
}
#config-menu.open {
    opacity: 1;
    visibility: visible;
}
#config-menu.locked {
    opacity: 1 !important;
    visibility: visible !important;
}
#menu-trigger:hover + #config-menu,
#config-menu:hover {
    opacity: 1;
    visibility: visible;
}

.menu-header {
    padding: 12px 20px;
    border-bottom: 2px solid var(--accent-color);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.app-title {
    display: flex;
    align-items: baseline;
    gap: 4px;
    border: 1px solid rgba(255,215,0,0.6);
    border-radius: 32px;
    padding: 4px 12px 4px 8px;
    background: rgba(0,0,0,0.3);
}
.app-icon {
    display: inline-block;
    margin-right: 2px;
}
.app-text {
    font-size: 20px;
    font-weight: bold;
    color: var(--accent-color);
    letter-spacing: 1px;
}
.version-label {
    color: #aaa;
    font-size: 11px;
    margin-left: 6px;
}
.header-buttons {
    display: flex;
    gap: 8px;
}
.lang-switch, .help-btn, .lock-btn {
    display: flex;
    background: #222;
    border-radius: 4px;
    overflow: hidden;
    border: 1px solid rgba(255,215,0,0.4);
    align-items: center;
    justify-content: center;
}
.lang-option, .help-btn, .lock-btn {
    padding: 4px 8px;
    font-size: 11px;
    font-weight: bold;
    cursor: pointer;
    background: transparent;
    color: #aaa;
    transition: 0.2s;
}
.lang-option.active {
    background: var(--accent-color);
    color: #000;
}
.help-btn, .lock-btn {
    color: var(--accent-color);
    min-width: 28px;
}
.help-btn svg, .lock-btn svg {
    width: 16px;
    height: 16px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2.5;
}
.help-btn:hover, .lock-btn:hover {
    background: var(--accent-color);
    color: #000;
}
.help-btn.active, .lock-btn.locked {
    background: var(--accent-color);
    color: #000;
}

.menu-body {
    padding: 14px 20px 20px;
    overflow-y: auto;
    flex: 1;
    font-size: 12px;
}
.menu-body::-webkit-scrollbar {
    width: 8px;
}
.menu-body::-webkit-scrollbar-track {
    background: transparent;
}
.menu-body::-webkit-scrollbar-thumb {
    background: rgba(255,215,0,0.6);
    border-radius: 4px;
}

.help-content {
    text-align: left;
    font-size: 13px;
    line-height: 1.5;
}
.help-content h3 {
    color: var(--accent-color);
    margin-top: 0;
}
.help-content a {
    color: var(--accent-color);
    text-decoration: none;
}
.help-content .quote {
    font-style: italic;
    border-left: 2px solid var(--accent-color);
    padding-left: 12px;
    margin: 15px 0;
    color: #ccc;
}

details {
    margin-bottom: 12px;
    border: 1px solid var(--accent-color);
    border-radius: 6px;
    overflow: hidden;
}
summary {
    padding: 8px 12px;
    font-weight: bold;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
    background: rgba(0,0,0,0.5);
    cursor: pointer;
    color: #fff;  /* branco conforme solicitado */
    list-style: none;
}
summary::-webkit-details-marker { display: none; }
summary::before {
    content: '▶';
    display: inline-block;
    margin-right: 8px;
    font-size: 10px;
    transition: transform 0.2s;
    color: var(--accent-color);
}
details[open] summary::before {
    transform: rotate(90deg);
}
.group-content {
    padding: 12px;
}

.setting {
    margin-bottom: 12px;
    transition: opacity 0.2s, filter 0.2s;
}
.setting.disabled,
.setting-group.disabled {
    opacity: var(--disabled-opacity);
    filter: var(--disabled-filter);
    pointer-events: none;
}
label.setting-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 11px;
    font-weight: bold;
    margin-bottom: 5px;
    color: var(--silver-text);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.slider-container {
    display: flex;
    align-items: center;
    gap: 10px;
}
.slider-value {
    color: var(--accent-color);
    font-size: 12px;
    font-weight: bold;
    min-width: 35px;
    text-align: right;
}
.warning {
    color: #ffaa00;
    font-size: 10px;
    margin-left: 5px;
}
input[type="range"] {
    -webkit-appearance: none;
    flex: 1;
    height: 5px;
    background: #222;
    outline: none;
    border-radius: 3px;
}
input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    background: var(--accent-color);
    border-radius: 2px;
    cursor: pointer;
}
select {
    width: 100%; background: #000; color: var(--silver-text);
    border: 1px solid var(--accent-color); padding: 8px;
    font-size: 11px; cursor: pointer; border-radius: 4px;
}
.toggle-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}
.toggle-label {
    font-size: 11px;
    font-weight: bold;
    color: var(--silver-text);
    text-transform: uppercase;
    letter-spacing: 0.3px;
}
.toggle {
    position: relative;
    width: 36px; height: 18px;
    flex-shrink: 0;
}
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
    position: absolute; inset: 0;
    background: #2a2a2a;
    border-radius: 18px;
    cursor: pointer;
    transition: background 0.25s;
}
.toggle input:checked + .toggle-slider { background: var(--accent-color); }
.toggle-slider::before {
    content: '';
    position: absolute;
    width: 12px; height: 12px;
    background: #fff;
    border-radius: 50%;
    left: 3px; top: 3px;
    transition: transform 0.25s;
}
.toggle input:checked + .toggle-slider::before { transform: translateX(18px); }
.toggle input:disabled + .toggle-slider {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-row {
    display: flex;
    gap: 8px;
    margin-top: 12px;
}
.action-btn {
    flex: 1;
    background: none;
    border: 1px solid rgba(255,215,0,0.5);
    color: var(--accent-color);
    font-size: 10px; font-weight: bold;
    text-transform: uppercase;
    padding: 8px 4px;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.2s;
    letter-spacing: 0.5px;
}
.action-btn:hover { background: rgba(255,215,0,0.12); }
.action-btn.focus-active {
    background: var(--accent-color);
    color: #000;
    border-color: var(--accent-color);
}
.darkness-persist { }