:root {
    /* Color Palette */
    --accent-color: #43d465;
    --accent-color-dark: #218838;
    --accent-color-light: #e9f5ec;
    --danger-color: #dc3545;
    --danger-color-dark: #c82333;
    
    /* Grey Scale */
    --grey-100: #f8f9fa;
    --grey-200: #e9ecef;
    --grey-300: #dee2e6;
    --grey-400: #ced4da;
    --grey-500: #adb5bd;
    --grey-700: #6c757d;
    --grey-900: #212529;
    --white: #ffffff;

    /* Semantic Variables */
    --bg-color: var(--grey-100);
    --card-bg: var(--white);
    --text-color: var(--grey-900);
    --text-muted: var(--grey-700);
    --border-color: var(--grey-300);
    --progress-bar-bg: var(--grey-200);

    /* Dynamic Effect Variables */
    --shadow-card: 0 1px 3px rgba(0,0,0,0.05);
    --shadow-card-hover: 0 4px 12px rgba(40, 167, 69, 0.2);
    --shadow-card-active: 0 1px 3px rgba(40, 167, 69, 0.15);
    --shadow-button: 0 5px 15px rgba(40, 167, 69, 0.3), inset 0 -4px 0 rgba(0,0,0,0.2);
    --shadow-button-hover: 0 7px 20px rgba(40, 167, 69, 0.4), inset 0 -4px 0 rgba(0,0,0,0.2);
    --shadow-button-active: 0 2px 8px rgba(40, 167, 69, 0.4), inset 0 -2px 0 rgba(0,0,0,0.2);
    --shadow-notification: 0 4px 12px rgba(0,0,0,0.15);
    --shadow-text: 0 0 5px rgba(0, 0, 0, 0.5);
}

body.no-shadows {
    --shadow-card: none;
    --shadow-card-hover: none;
    --shadow-card-active: none;
    --shadow-button: none;
    --shadow-button-hover: none;
    --shadow-button-active: none;
    --shadow-notification: none;
    --shadow-text: none;
}


body {
    font-family: system-ui, -apple-system, sans-serif;
    background-color: var(--bg-color); 
    color: var(--text-color); 
    margin: 0; 
    overflow-x: hidden;
}

.container { display: flex; flex-wrap: wrap; padding: 15px; gap: 15px; max-width: 1400px; margin: 0 auto; }
.column { padding: 20px; box-sizing: border-box; background-color: var(--card-bg); border: 1px solid var(--border-color); border-radius: 8px; }
#left-column { flex: 2; min-width: 400px; }
#right-column { flex: 1; min-width: 340px; max-height: 95vh; overflow-y: auto; }

#game-title {
    font-size: 2.5em;
    font-weight: 700;
    color: var(--text-color);
    text-align: center;
    margin: 0 0 20px 0;
}

.game-header { 
    position: relative;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    background-color: var(--grey-100);
    padding: 15px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}
.stats-bar {
    display: flex;
    flex-direction: column;
    gap: 5px;
}
#totalData { 
    font-size: 2em; 
    font-weight: 700;
    color: var(--grey-900);
}
#dataPerSecond {
    display: flex;
    align-items: center;
    font-size: 1.2em;
    font-weight: 500;
    color: var(--text-muted);
}
#dataPerSecond img {
    width: 20px;
    height: 20px;
    margin-right: 8px;
}

.header-icons {
    display: flex;
    gap: 15px;
}
.header-icon {
    font-size: 1.8em;
    cursor: pointer;
    color: var(--grey-700);
    transition: transform 0.2s, color 0.2s;
}
.header-icon:hover {
    transform: scale(1.1);
    color: var(--accent-color);
}
.header-icon svg {
    width: 1em;
    height: 1em;
}

#clickButton {
    width: 100%; 
    padding: 20px 0; 
    font-size: 1.6em; 
    font-weight: 700; 
    cursor: pointer;
    border: 1px solid var(--accent-color-dark); 
    border-radius: 12px; 
    background-color: var(--accent-color);
    color: var(--white); 
    transition: all 0.15s ease-in-out; 
    box-shadow: var(--shadow-button);
    margin-bottom: 25px;
    text-transform: uppercase;
}
#clickButton:hover { 
    background-color: var(--accent-color-dark);
    transform: translateY(-2px); 
    box-shadow: var(--shadow-button-hover); 
}
#clickButton:active { 
    transform: translateY(1px); 
    box-shadow: var(--shadow-button-active); 
}

h2 { 
    font-size: 1.4em; 
    font-weight: 600; 
    border-bottom: 1px solid var(--border-color); 
    padding-bottom: 10px; 
    margin-top: 0; 
    margin-bottom: 20px; 
}
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 15px; }
.card-list { display: flex; flex-direction: column; gap: 12px; }

.card { 
    border: 1px solid var(--border-color); 
    border-radius: 8px; 
    background-color: var(--card-bg); 
    position: relative; 
    overflow: hidden; 
    box-shadow: var(--shadow-card); 
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, background-color 0.2s ease, color 0.2s ease;
}

.card-progress {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    background-color: var(--progress-bar-bg);
    z-index: 1;
    width: 0%;
}
.card-content { position: relative; z-index: 2; padding: 12px; }
.card-header { display: flex; justify-content: space-between; align-items: center; font-weight: 600; font-size: 1.1em; margin-bottom: 8px; }
.card-stats { color: var(--text-muted); font-size: 0.9em; margin-bottom: 8px; }
.card-description { font-size: 0.9em; margin-bottom: 15px; color: var(--text-muted); }

.achievement-card .card-name { font-weight: 600; margin-bottom: 4px; }
.achievement-card .card-description { margin-bottom: 0; }

.device-card { cursor: not-allowed; }

.device-card.can-buy {
    cursor: pointer;
    border-color: var(--accent-color);
    box-shadow: 0 2px 8px rgba(40, 167, 69, 0.15);
}

.device-card.can-buy:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(40, 167, 69, 0.2);
}

.device-card.can-buy:active {
    transform: translateY(0);
    background-color: var(--accent-color-light); /* Flash light green on click */
    box-shadow: var(--shadow-card-active);
}

.device-cost {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8px;
    margin-top: 8px;
    border-radius: 6px;
    background-color: var(--grey-200);
    font-weight: 600;
    color: var(--text-color);
    border: 1px solid var(--border-color);
    transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.cost-icon { 
    width: 20px; 
    height: 20px; 
    margin-right: 8px; 
    transition: filter 0.2s ease;
}

/* Style ONLY the cost element when buyable */
.device-card.can-buy .device-cost {
    background-color: var(--accent-color);
    border-color: var(--accent-color-dark);
    color: var(--white);
}

.device-card.can-buy .device-cost .cost-icon {
    filter: brightness(0) invert(1);
}

.device-card:not(.can-buy) .device-cost { 
    background-color: var(--grey-100); 
    color: var(--grey-500); 
}

.buy-button {
    width: 100%; 
    padding: 10px; 
    border-radius: 6px; 
    font-weight: 600; 
    border: 1px solid var(--border-color);
    background-color: var(--grey-100); 
    color: var(--grey-500); 
    cursor: not-allowed; 
    text-align: center; 
    transition: all 0.2s ease;
}
.buy-button.can-buy { 
    background-color: var(--accent-color); 
    border-color: var(--accent-color); 
    color: var(--white); 
    cursor: pointer; 
}
.buy-button.can-buy:hover { 
    background-color: var(--accent-color-dark); 
    border-color: var(--accent-color-dark); 
    transform: scale(1.02); 
}

/* --- ÍCONES --- */
.info-icon {
    cursor: pointer;
    width: 24px;
    height: 24px;
    color: var(--text-muted);
    transition: color 0.2s ease, transform 0.2s ease;
}
.info-icon:hover {
    color: var(--accent-color);
    transform: scale(1.1);
}

/* --- MODALS (POP-UPS) --- */
.modal-backdrop {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background-color: rgba(0,0,0,0.5); 
    z-index: 1010;
    display: flex; justify-content: center; align-items: center;
    opacity: 0; transition: opacity 0.3s ease; pointer-events: none;
}
.modal-backdrop:not(.hidden) { opacity: 1; pointer-events: all; }
.modal-content {
    background: var(--card-bg); padding: 25px; border-radius: 8px;
    width: 90%; max-width: 500px; max-height: 80vh; overflow-y: auto;
    transform: scale(0.95); transition: transform 0.3s ease;
}
.modal-backdrop:not(.hidden) .modal-content { transform: scale(1); }
.modal-header { display: flex; justify-content: space-between; align-items: center; }
.modal-header h2 { border-bottom: none; margin-bottom: 15px; }
.modal-close { font-size: 2em; font-weight: bold; cursor: pointer; color: var(--text-muted); }
.modal-list { max-height: 60vh; overflow-y: auto; padding-right: 10px;}
.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 25px;
}

/* --- UNIFIED BUTTON STYLES --- */
.control-button {
    padding: 12px 20px;
    font-size: 1em;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--grey-100);
    color: var(--text-color);
    transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.1s ease;
}
.control-button:hover {
    background-color: var(--grey-200);
    border-color: var(--grey-400);
}
.control-button:active {
    transform: translateY(1px);
}

.button-danger {
    background-color: var(--danger-color);
    border-color: var(--danger-color-dark);
    color: var(--white);
}
.button-danger:hover {
    background-color: var(--danger-color-dark) !important;
    border-color: var(--danger-color-dark);
}

.settings-content {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-top: 20px;
}
.setting-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.setting-item label {
    font-weight: 500;
}
.setting-item select {
    padding: 8px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    background-color: var(--white);
    min-width: 200px;
}
.toggle-switch {
    appearance: none;
    width: 50px;
    height: 26px;
    background: var(--grey-300);
    border-radius: 15px;
    position: relative;
    cursor: pointer;
    transition: background-color 0.3s;
}
.toggle-switch::before {
    content: '';
    position: absolute;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: white;
    top: 2px;
    left: 2px;
    transition: transform 0.3s;
}
.toggle-switch:checked {
    background: var(--accent-color);
}
.toggle-switch:checked::before {
    transform: translateX(24px);
}


.hidden { display: none !important; }
.achievement-card.completed { border-left: 5px solid var(--accent-color); }

/* SCROLLBAR & NOTIFICATIONS */
::-webkit-scrollbar { width: 10px; } 
::-webkit-scrollbar-track { background: var(--bg-color); }
::-webkit-scrollbar-thumb { background: var(--grey-400); border-radius: 5px; } 
::-webkit-scrollbar-thumb:hover { background: var(--grey-500); }

#notification-container {
    position: fixed; top: 20px; left: 50%; transform: translateX(-50%); 
    z-index: 1020;
    display: flex; flex-direction: column; align-items: center; gap: 10px; pointer-events: none;
}
.notification {
    padding: 12px 20px;
    border-radius: 8px;
    background-color: var(--card-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-notification);
    font-weight: 500;
    animation: slideDownFadeOut 4s ease-in-out forwards;
}
@keyframes slideDownFadeOut {
    0% { transform: translateY(-100px); opacity: 0; }
    10% { transform: translateY(0); opacity: 1; }
    90% { transform: translateY(0); opacity: 1; }
    100% { transform: translateY(-100px); opacity: 0; }
}

/* --- NEW POPUP STYLES --- */
#autosave-toast-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1025;
    pointer-events: none;
}
.autosave-toast {
    padding: 15px 25px;
    border-radius: 8px;
    background-color: var(--grey-900);
    color: var(--white);
    box-shadow: var(--shadow-notification);
    font-weight: 500;
    animation: fadeInOut 8s ease-in-out forwards;
}
@keyframes fadeInOut {
    0% { opacity: 0; transform: translateY(20px); }
    10% { opacity: 1; transform: translateY(0); }
    90% { opacity: 1; transform: translateY(0); }
    100% { opacity: 0; transform: translateY(20px); }
}

#did-you-know-container {
    position: fixed;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 500px;
    display: flex;
    flex-direction: column-reverse;
    align-items: center;
    z-index: 1024;
    pointer-events: none;
}
.did-you-know-popup {
    background-color: rgba(20, 20, 20, 0.85);
    color: var(--white);
    padding: 12px 20px;
    border-radius: 8px;
    margin-bottom: 10px;
    box-shadow: 0 0 15px rgba(0,0,0,0.3);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    animation: slideUpFadeOut 10s ease-out forwards;
    text-align: center;
    font-size: 0.9em;
}
@keyframes slideUpFadeOut {
    0% { transform: translateY(100%); opacity: 0; }
    10% { transform: translateY(0); opacity: 1; }
    90% { transform: translateY(0); opacity: 1; }
    100% { transform: translateY(-50px); opacity: 0; }
}


/* ANIMATIONS */
.data-animation {
    position: fixed;
    font-weight: bold;
    pointer-events: none;
    text-shadow: var(--shadow-text);
    animation: floatUp 2s ease-out forwards;
    z-index: 1000;
    transform: translate(-50%, -50%);
}
.click-animation { font-size: 1.5em; color: var(--accent-color); }
.cycle-animation { font-size: 1.2em; color: var(--accent-color-dark); }

@keyframes floatUp {
    0% { transform: translate(-50%, -50%); opacity: 1; }
    100% { transform: translate(-50%, -200%); opacity: 0; }
}

.card-progress.running {
    animation-name: progress-fill, progress-color-change;
    animation-duration: var(--cycle-time, 1s);
    animation-timing-function: linear, ease-in;
    animation-fill-mode: forwards;
}

@keyframes progress-fill {
    from { width: 0%; }
    to   { width: 100%; }
}

@keyframes progress-color-change {
    0%   { background-color: var(--white); }
    60%  { background-color: var(--accent-color-light); }
    100% { background-color: var(--accent-color); }
}

.card-controls{
    display: flex;
    flex-direction: row-reverse;
    gap: 8px;
}