:root {
    --bg-image-dark: url('https://placehold.co/1920x1080/0c0a1e/0c0a1e?text=');
    --bg-color-dark: #0c0a1e;
    --text-color-dark: #e0e0e0;
    --card-bg-dark: rgba(30, 27, 58, 0.7);
    --card-border-dark: #a855f7;
    --btn-primary-bg-dark: #8b5cf6;
    --btn-primary-hover-bg-dark: #a855f7;
    --btn-option-bg-dark: #282347;
    --btn-option-border-dark: #4c1d95;
    --btn-option-hover-bg-dark: #4c1d95;
    --pixel-color-dark: #FFFFFF;
    --glowing-text-shadow-dark: 0 0 8px #d946ef, 0 0 12px #d946ef;

    --bg-image-light: url('https://images.unsplash.com/photo-1593369459307-d4724da273de?q=80&w=1920&auto=format&fit=crop');
    --bg-color-light: #effaee;
    --text-color-light: #4a4a4a;
    --card-bg-light: rgba(255, 255, 255, 0.8);
    --card-border-light: #876145;
    --btn-primary-bg-light: #5a9a50;
    --btn-primary-hover-bg-light: #6cba60;
    --btn-option-bg-light: #d3b8a3;
    --btn-option-border-light: #876145;
    --btn-option-hover-bg-light: #bca08a;
    --pixel-color-light: #000000;
    --glowing-text-shadow-light: none;
}

body {
    font-family: 'Inter', sans-serif;
    background-image: var(--bg-image-dark);
    background-color: var(--bg-color-dark);
    color: var(--text-color-dark);
    transition: background-color 0.5s, color 0.5s;
}
.card {
    background-color: var(--card-bg-dark);
    border: 1px solid var(--card-border-dark);
    backdrop-filter: blur(10px);
    transition: background-color 0.5s, border-color 0.5s;
}
.btn-primary, .btn-menu {
    background-color: var(--btn-primary-bg-dark);
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0,0,0,0.2);
}
.btn-primary:hover, .btn-menu:hover {
    background-color: var(--btn-primary-hover-bg-dark);
    transform: translateY(-2px);
}
.btn-option {
    background-color: var(--btn-option-bg-dark);
    border: 1px solid var(--btn-option-border-dark);
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 70px;
}
.btn-option:hover {
    background-color: var(--btn-option-hover-bg-dark);
    border-color: var(--btn-option-hover-bg-dark);
}
.btn-option.correct {
    background-color: #22c55e !important;
    border-color: #16a34a !important;
    color: white;
}
.btn-option.incorrect {
    background-color: #ef4444 !important;
    border-color: #dc2626 !important;
    color: white;
}
.progress-bar-bg {
    background-color: var(--btn-option-bg-dark);
}
.progress-bar-fill {
    background: var(--btn-primary-bg-dark);
    transition: width 0.5s ease-in-out, background-color 0.5s;
}
.keyboard-key {
    cursor: pointer;
    user-select: none;
    min-height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.keyboard-key:active {
    transform: scale(0.95);
}
.input-box {
    min-height: 80px;
    background-color: rgba(12, 10, 30, 0.8);
    border: 1px dashed var(--btn-option-border-dark);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
}
.glowing-text {
    text-shadow: var(--glowing-text-shadow-dark);
}
.question-display-container {
    min-height: 140px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.pixel-on {
    background-color: var(--pixel-color-dark);
}

/* Light Mode Styles */
body.light-mode {
    background-image: var(--bg-image-light);
    background-color: var(--bg-color-light);
    color: var(--text-color-light);
}
.light-mode .card {
    background-color: var(--card-bg-light);
    border-color: var(--card-border-light);
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}
.light-mode .btn-primary, .light-mode .btn-menu {
    background-color: var(--btn-primary-bg-light);
    color: white;
}
.light-mode .btn-primary:hover, .light-mode .btn-menu:hover {
    background-color: var(--btn-primary-hover-bg-light);
}
.light-mode .btn-option {
    background-color: var(--btn-option-bg-light);
    border-color: var(--btn-option-border-light);
    color: var(--text-color-light);
}
.light-mode .btn-option:hover {
    background-color: var(--btn-option-hover-bg-light);
}
.light-mode .progress-bar-bg {
    background-color: #d3b8a3;
}
.light-mode .progress-bar-fill {
    background: var(--btn-primary-bg-light);
}
.light-mode .input-box {
    background-color: rgba(255, 255, 255, 0.6);
    border-color: var(--btn-option-border-light);
}
.light-mode .glowing-text {
    text-shadow: var(--glowing-text-shadow-light);
}
.light-mode #level-title, .light-mode .glowing-text, .light-mode .menu-title {
    color: #4a7a42;
}
.light-mode .pixel-on {
    background-color: var(--pixel-color-light);
}

#theme-toggle {
    position: absolute;
    top: 20px;
    right: 20px;
    cursor: pointer;
    background-color: rgba(40, 35, 71, 0.7);
    border-radius: 9999px;
    padding: 8px;
    border: 1px solid #4c1d95;
    z-index: 50;
}
.light-mode #theme-toggle {
    background-color: rgba(211, 184, 163, 0.8);
    border-color: #876145;
}
#back-to-main-menu-2 {
    position: absolute;
    top: 20px;
    left: 20px;
    z-index: 50;
}

/* Cheatsheet Styles */
#cheatsheet {
    transition: transform 0.3s ease-in-out, opacity 0.3s ease-in-out;
    transform: translateY(20px);
    opacity: 0;
}

#cheatsheet.hidden {
    transform: translateY(20px);
    opacity: 0;
    pointer-events: none;
}

#cheatsheet:not(.hidden) {
    transform: translateY(0);
    opacity: 1;
}

.cheatsheet-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 8px;
    border-radius: 8px;
    background-color: var(--btn-option-bg-dark);
}

.light-mode .cheatsheet-item {
    background-color: var(--btn-option-bg-light);
}

.cheatsheet-char {
    font-weight: bold;
    font-size: 1.25rem;
}