:root {
    --primary: #6d28d9;
    --primary-dark: #5b21b6;
    --secondary: #0e7490;
    --success: #16a34a;
    --warning: #ea580c;
    --danger: #dc2626;
    
    --bg-color: #111827;
    --text-color: #f1f5f9;
    --text-secondary-color: #9ca3af;
    --container-bg: #1e293b;
    --container-border: #334155;
    --key-bg: #4b5563;
    --key-bg-hover: #6b7280;
    --key-text-color: #f1f5f9;
    --tile-border: #4b5563;
    --header-btn-bg: #475569;
    --header-btn-bg-hover: #64748b;
    --toast-bg: #1f2937;
    --modal-bg: #283447;
    --modal-header-bg: #334155;
    --modal-backdrop-bg: rgba(0, 0, 0, 0.3);
    --card-bg: #334155;
    --card-hover-bg: #475569;
    --score-bg: #334155;
    --score-breakdown-bg: #374151;
    --select-bg: #374151;
    --select-border: #4b5563;
    --disabled-bg: #4b5563;
    --disabled-opacity: 0.5;
    --tooltip-bg: #111827;
    --tooltip-text: #ffffff;
}

html.light {
    --bg-color: #f3f4f6;
    --text-color: #1f2937;
    --text-secondary-color: #4b5563;
    --container-bg: #ffffff;
    --container-border: #e5e7eb;
    --key-bg: #d1d5db;
    --key-bg-hover: #9ca3af;
    --key-text-color: #1f2937;
    --tile-border: #d1d5db;
    --header-btn-bg: #e5e7eb;
    --header-btn-bg-hover: #d1d5db;
    --toast-bg: #ffffff;
    --modal-bg: #ffffff;
    --modal-header-bg: #f3f4f6;
    --modal-backdrop-bg: rgba(255, 255, 255, 0.3);
    --card-bg: #e5e7eb;
    --card-hover-bg: #d1d5db;
    --score-bg: #e5e7eb;
    --score-breakdown-bg: #f3f4f6;
    --select-bg: #f3f4f6;
    --select-border: #d1d5db;
    --disabled-bg: #d1d5db;
    --disabled-opacity: 0.7;
    --tooltip-bg: #ffffff;
    --tooltip-text: #1f2937;
}

body {
    font-family: 'Inter', sans-serif;
    touch-action: manipulation;
    background-color: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
    overflow-x: hidden;
    transition: background-color 0.3s, color 0.3s;
}

.game-container {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    padding: 0 0.5rem; 
}

.header-glow { text-shadow: 0 0 15px rgba(139, 92, 246, 0.7); }
.tile { transition: transform 0.6s, background-color 0.3s; transform-style: preserve-3d; }
.tile.flip { transform: rotateX(180deg); }
.front, .back { backface-visibility: hidden; -webkit-backface-visibility: hidden; }
.front { border: 2px solid var(--tile-border); }
.back { transform: rotateX(180deg); }

#toast {
    transition: transform 0.5s, opacity 0.5s;
    transform: translateY(100px);
    opacity: 0;
    background-color: var(--toast-bg);
    color: var(--text-color);
    border: 1px solid var(--container-border);
}
#toast.show { transform: translateY(0); opacity: 1; }

.modal-backdrop {
    background-color: var(--modal-backdrop-bg);
    transition: opacity 0.3s ease-in-out;
    opacity: 0;
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
}
.modal-scale { transition: transform 0.3s ease-out, opacity 0.3s ease-out; }

.modal-content {
        background: var(--modal-bg);
        border: 1px solid var(--container-border);
        border-radius: 1rem;
        box-shadow: 0 10px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
        transition: background-color 0.3s, border-color 0.3s;
        display: flex;
        flex-direction: column;
        overflow: hidden;
        max-height: 90vh;
}
.modal-header {
    padding: 1rem 1.5rem;
    background-color: var(--modal-header-bg);
    border-bottom: 1px solid var(--container-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
#modal-title-generic, #modal-title-end { font-size: 1.25rem; font-weight: 600; }
.modal-body { padding: 1.5rem; overflow-y: auto; }
.close-modal-btn {
    background: none; border: none; font-size: 1.5rem; line-height: 1;
    color: var(--text-secondary-color); cursor: pointer; transition: color 0.2s;
}
.close-modal-btn:hover { color: var(--text-color); }

.loader { border: 2px solid #f3f3f3; border-top: 2px solid var(--primary); border-radius: 50%; width: 16px; height: 16px; animation: spin 1s linear infinite; }
@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }
@keyframes pulse { 0% { transform: scale(1); } 50% { transform: scale(1.05); } 100% { transform: scale(1); } }
.pulse-animation { animation: pulse 2s infinite; }
@keyframes jiggle {
    0%, 100% { transform: rotate(0deg); }
    10%, 60% { transform: rotate(-4deg); }
    35%, 85% { transform: rotate(4deg); }
}
.jiggle-it { animation: jiggle 0.6s ease-in-out; }

.geimini-logo { color: #7b9ae5; }
.feature-card { background: var(--card-bg); border-radius: 12px; padding: 12px; transition: all 0.3s; border: 1px solid var(--container-border); }
.feature-card:hover { transform: translateY(-5px); background: var(--card-hover-bg); box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1); }
.btn-primary { background: var(--primary); transition: all 0.3s; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 5px 15px rgba(109, 40, 217, 0.4); }
.btn-secondary { background: var(--secondary); transition: all 0.3s; }
.btn-secondary:hover { background: #0c636e; transform: translateY(-2px); box-shadow: 0 5px 15px rgba(14, 116, 144, 0.4); }

.btn-primary:disabled, .hint-btn:disabled {
    background: var(--disabled-bg);
    opacity: var(--disabled-opacity);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.score-display { background: var(--score-bg); border-radius: 10px; padding: 10px 20px; font-weight: bold; color: #fbbf24; text-shadow: 0 0 5px rgba(251, 191, 36, 0.5); display: flex; align-items: center; transition: background-color 0.3s, text-shadow 0.3s; }

.keyboard-key {
    min-width: 30px; height: 50px; display: flex; align-items: center; justify-content: center; border-radius: 8px; font-weight: bold; cursor: pointer; user-select: none;
    background-color: var(--key-bg); color: var(--key-text-color); transition: background-color 0.3s, color 0.3s;
}
.keyboard-key:hover { background-color: var(--key-bg-hover); }
.keyboard-key.special { font-size: 0.8rem; }

.color-indicator { width: 20px; height: 20px; border-radius: 4px; display: inline-block; margin: 0 5px; }

.tooltip-container { position: relative; display: inline-flex; }
.tooltip {
    position: fixed;
    background-color: var(--tooltip-bg); color: var(--tooltip-text);
    padding: 6px 10px; border-radius: 6px; font-size: 0.8rem; line-height: 1.4;
    white-space: nowrap; max-width: 220px; text-align: center;
    opacity: 0; visibility: hidden; transition: opacity 0.2s, visibility 0.2s, transform 0.2s;
    pointer-events: none; z-index: 100;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.header-btn {
    background-color: var(--header-btn-bg); width: 36px; height: 36px; border-radius: 50%; display: flex; align-items: center; justify-content: center; cursor: pointer;
    transition: background-color 0.3s; color: var(--text-color); border: 1px solid var(--container-border);
}
.header-btn:hover { background-color: var(--header-btn-bg-hover); }

#flipper-container { perspective: 1000px; }
#flipper-inner { transition: transform 0.6s; transform-style: preserve-3d; position: relative; min-height: 420px; }
#flipper-inner.is-flipped { transform: rotateY(180deg); }
#end-card-front, #end-card-back {
    position: absolute; width: 100%; height: 100%; top: 0; left: 0;
    backface-visibility: hidden; -webkit-backface-visibility: hidden;
    overflow: auto;
}
#end-card-back { transform: rotateY(180deg); }

.word-info-loader-dots { display: flex; justify-content: center; align-items: center; gap: 8px; height: 150px; }
.word-info-loader-dots div { width: 10px; height: 10px; background-color: var(--primary); border-radius: 50%; animation: bounce 1.4s infinite ease-in-out both; }
.word-info-loader-dots .dot1 { animation-delay: -0.32s; }
.word-info-loader-dots .dot2 { animation-delay: -0.16s; }
@keyframes bounce { 0%, 80%, 100% { transform: scale(0); } 40% { transform: scale(1.0); } }

#word-info-content { text-align: left; }
#word-info-content h3 { font-size: 1.1rem; font-weight: 600; color: var(--primary); margin-top: 1rem; margin-bottom: 0.5rem; border-bottom: 1px solid var(--container-border); padding-bottom: 0.5rem; }
#word-info-content ol { list-style: decimal; padding-left: 1.5rem; }
#word-info-content li { margin-bottom: 1.25rem; }
#word-info-content li > p { margin-bottom: 0.25rem; }
#word-info-content em { color: var(--text-secondary-color); font-style: italic; display: block; margin-top: 0.25rem; }
#play-audio-btn { background: none; border: none; color: var(--primary); cursor: pointer; margin-left: 0.5rem; }

html.light .header-glow { text-shadow: none; }
html.light .score-display { text-shadow: none; }
html.light .modal-content { color: var(--text-color); }
html.light .text-gray-300, html.light .text-gray-400 { color: var(--text-secondary-color) !important; }
html.light .keyboard-key.bg-green-600, html.light .keyboard-key.bg-amber-500, html.light .keyboard-key.bg-gray-700 { color: #ffffff; }
html.light #modal-body-generic hr { border-color: var(--tile-border); }
html.light #history-modal-list li { background-color: var(--key-bg) !important; color: var(--text-color); }
.score-breakdown { background-color: var(--score-breakdown-bg); transition: background-color 0.3s; }
html.light .score-breakdown * { color: var(--text-color); }
html.light .score-breakdown .text-amber-400 { color: #fbbf24 !important; }

.theme-switch-wrapper { display: flex; align-items: center; }
.theme-switch-wrapper i { color: var(--text-color); }
.theme-switch { display: inline-block; height: 24px; position: relative; width: 44px; margin: 0 10px; }
.theme-switch input { display:none; }
.slider { background-color: #ccc; bottom: 0; cursor: pointer; left: 0; position: absolute; right: 0; top: 0; transition: .4s; border-radius: 24px; }
.slider:before { background-color: #fff; bottom: 4px; content: ""; height: 16px; left: 4px; position: absolute; transition: .4s; width: 16px; border-radius: 50%; }
input:checked + .slider { background-color: var(--primary); }
input:checked + .slider:before { transform: translateX(20px); }

#end-card-back::-webkit-scrollbar-track {
    background: transparent;
}

#end-card-back::-webkit-scrollbar {
    width: 15px;
}

#end-card-back::-webkit-scrollbar-thumb {
    background-clip: content-box; 
    border-radius: 10px;
    border: 5px solid transparent; 
    background-color: rgba(128, 128, 128, 0.7);
}

#end-card-back:hover::-webkit-scrollbar-thumb {
    background-color: rgba(160, 160, 160, 0.8);
    border: 4px solid transparent;
}

#end-card-back:hover::-webkit-scrollbar-thumb:active {
    background-color: rgba(190, 190, 190, 0.9);
    border: 2px solid transparent; 
}

@supports (scrollbar-color: auto) {
  #end-card-back {
    scrollbar-width: thin;
    scrollbar-color: rgba(160, 160, 160, 0.8) transparent; 
  }
}

.definition-box {
    background-color: var(--score-breakdown-bg);
    padding: 0.75rem;
    border-radius: 0.375rem;
    margin-top: 1rem;
    font-size: 0.875rem;
    line-height: 1.25rem;
}

.more-options-modal .modal-content {
    max-width: 280px;
}

.more-options-modal .modal-body {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    padding: 1rem;
}

.modal-option-btn {
    width: 100%;
    padding: 0.75rem;
    font-size: 1rem;
    font-weight: 600;
    text-align: left;
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    background-color: var(--header-btn-bg);
    color: var(--text-color);
    transition: background-color 0.2s;
}

.modal-option-btn:hover {
    background-color: var(--header-btn-bg-hover);
}

@media (min-width: 640px) {
    html, body {
        height: auto;
        overflow: auto;
        padding: 0;
    }
    body {
        padding: 1rem;
    }
}

.accordion-item {
    border-bottom: 1px solid var(--container-border);
}
.accordion-item:last-child {
    border-bottom: none;
}
.accordion-header {
    width: 100%;
    padding: 1rem;
    font-size: 1rem;
    font-weight: 600;
    text-align: left;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: none;
    border: none;
    color: var(--text-color);
    cursor: pointer;
}
.accordion-header::after {
    content: '\f078';
    font-family: 'Font Awesome 7 Free';
    font-weight: 900;
    transition: transform 0.3s ease;
}
.accordion-header.active::after {
    transform: rotate(180deg);
}
.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-in-out;
    padding: 0 1rem;
}
.accordion-content-inner {
    padding-bottom: 1rem;
}

.modal-theme-switcher {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
}

.score-display {
    padding: 5px 10px; 
    font-size: 0.9rem; 
}

.score-display .fa-star, .score-display .fa-clock {
    margin-right: 0.25rem; 
}

.game-container {
    background: none;
    border: none;
    box-shadow: none;
    border-radius: 0;
}

@media (min-width: 500px) {
    .score-display {
        padding: 10px 20px; 
        font-size: 1rem;  
    }
    
    .score-display .fa-star, .score-display .fa-clock {
        margin-right: 0.5rem; 
    }

    .game-container {
        max-width: 500px;
        height: auto;
        margin: 1rem auto;
        padding: 0;
        background: var(--container-bg);
        border: 1px solid var(--container-border);
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        border-radius: 16px;
        overflow: hidden;
        transition: background-color 0.3s, border-color 0.3s;
    }
}

@keyframes shake-key {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-2px); }
  75% { transform: translateX(2px); }
}

.shake-key-animation {
  animation: shake-key 0.2s ease-in-out;
}

.custom-select {
  position: relative;
  width: 100px;
}

.custom-select select {
  display: none;
}

.select-selected {
  background-color: var(--select-bg);
  border: 1px solid var(--select-border);
  border-radius: 0.5rem;
  padding: 0.6rem 2.5rem 0.6rem 1rem;
  color: var(--text-color);
  cursor: pointer;
  transition: all 0.3s;
  position: relative;
  user-select: none;
}

.select-selected::after {
  content: '\f078';
  font-family: 'Font Awesome 7 Free';
  font-weight: 900;
  position: absolute;
  top: 50%;
  right: 1rem;
  transform: translateY(-50%);
  color: var(--text-secondary-color);
  transition: transform 0.3s ease;
}

.select-selected.select-arrow-active::after {
  transform: translateY(-50%) rotate(180deg);
}

.select-items {
  position: absolute;
  background-color: var(--select-bg);
  border: 1px solid var(--select-border);
  top: 110%;
  left: 0;
  right: 0;
  z-index: 99;
  border-radius: 0.5rem;
  max-height: 220px;
  overflow-y: auto;
  box-shadow: 0 8px 16px rgba(0,0,0,0.2);
}

.select-hide {
  display: none;
}

.select-items div {
  color: var(--text-color);
  padding: 0.75rem 1rem;
  cursor: pointer;
  transition: background-color 0.2s;
}

.select-items div:hover {
  background-color: var(--primary-dark);
  color: #ffffff;
}

.select-items .same-as-selected {
  background-color: var(--primary);
  color: #ffffff;
}

.select-items::-webkit-scrollbar-track {
    background: transparent;
}

.select-items::-webkit-scrollbar {
    width: 15px;
}

.select-items::-webkit-scrollbar-thumb {
    background-clip: content-box; 
    border-radius: 10px;
    border: 5px solid transparent; 
    background-color: rgba(128, 128, 128, 0.7);
}

.select-items:hover::-webkit-scrollbar-thumb {
    background-color: rgba(160, 160, 160, 0.8);
    border: 4px solid transparent;
}

.select-items:hover::-webkit-scrollbar-thumb:active {
    background-color: rgba(190, 190, 190, 0.9);
    border: 2px solid transparent; 
}

@supports (scrollbar-color: auto) {
  .select-items {
    scrollbar-width: thin;
    scrollbar-color: rgba(160, 160, 160, 0.8) transparent; 
  }
}