:root {
    
    --bg-color: #000;
    --card-color: #1a1a1a;
    --text-color: #fff;
    --digit-width: 180px; 
    --digit-height: 250px; 
    --font-size: 12em; 
    --border-radius: 10px;
    --transition-speed: 0.3s; 
    --button-color: #333;
    --highlight-color: #686868; 
}

body {
    background-color: var(--bg-color);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    font-family: 'Arial Black', sans-serif;
}

/* --- Utilities --- */
.hidden { display: none !important; }

/* --- Navegação/Botões de Modo --- */
.mode-selector {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
}

.mode-selector button {
    background-color: var(--button-color);
    color: var(--text-color);
    border: none;
    padding: 10px 20px;
    font-size: 1.2em;
    cursor: pointer;
    border-radius: 5px;
    transition: background-color 0.2s;
}

.mode-selector button:hover {
    background-color: #555;
}

.mode-selector button.active {
    background-color: var(--highlight-color);
    color: var(--bg-color);
}

/* --- Display Principal (Relógio/Timer) --- */
.digital-clock, .timer-display {
    display: flex;
    gap: 10px;
    align-items: center;
}

.digit-group {
    display: flex;
    gap: 5px;
}

.separator {
    color: var(--text-color);
    font-size: var(--font-size);
    height: var(--digit-height); 
    line-height: var(--digit-height);
    margin: 0 5px;
}

/* --- Estilo do Dígito Individual com Efeito de GIRO 3D --- */
.digit-box {
    width: var(--digit-width);
    height: var(--digit-height);
    position: relative;
    font-size: var(--font-size);
    color: var(--text-color);
    background-color: var(--card-color);
    border-radius: var(--border-radius);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.5);
    
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    box-sizing: border-box;
    line-height: 1; 

    perspective: 500px;
    transition: transform var(--transition-speed) ease-in-out, opacity var(--transition-speed) ease-in-out;
    
    transform: rotateY(0deg);
    opacity: 1;
}

.digit-box.change {
    transform: rotateY(180deg);
    opacity: 0.1; 
}

.date-info {
    color: var(--text-color);
    font-size: 2em;
    margin-top: 20px;
    letter-spacing: 8px;
    text-align: center;
}

/* --- Controles do Timer --- */
.timer-controls {
    margin-top: 30px;
    display: flex;
    gap: 15px;
}
.timer-controls button {
    background-color: var(--button-color);
    color: var(--text-color);
    border: none;
    padding: 10px 20px;
    font-size: 1.1em;
    cursor: pointer;
    border-radius: 5px;
}
#start-timer { background-color: var(--highlight-color); color: var(--bg-color); }
#pause-timer { background-color: #f0ad4e; } 
#reset-timer { background-color: #943835; }
#config-timer { background-color: #377385; }

/* --- MODAL (POP-UP) --- */
.modal {
    position: fixed;
    z-index: 10;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background-color: var(--card-color);
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.7);
    color: var(--text-color);
    text-align: center;
}

.modal-content h2 {
    margin-top: 0;
    margin-bottom: 20px;
    font-size: 1.5em;
    letter-spacing: 3px;
}

.config-labels {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 10px;
    font-size: 1em;
    font-weight: bold;
}
.config-labels label {
    width: 100px; 
    text-align: center;
}


.config-time-display {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-size: 3em;
    margin-bottom: 30px;
}

.config-time-display input {
    width: 100px;
    height: 100px;
    background-color: var(--bg-color);
    color: var(--text-color);
    border: 2px solid var(--text-color);
    border-radius: var(--border-radius);
    font-size: 2em;
    text-align: center;
    padding: 0;
    -moz-appearance: textfield; 
}

.config-time-display input::-webkit-outer-spin-button,
.config-time-display input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.modal-actions button {
    background-color: var(--highlight-color);
    color: var(--bg-color);
    border: none;
    padding: 10px 20px;
    font-size: 1.1em;
    cursor: pointer;
    border-radius: 5px;
    margin: 0 10px;
}
#close-modal {
    background-color: #ff0800;
    color: var(--text-color);
}