/* Color Palette */
:root {
    --bg-main: #000028;
    --text-stone: #E5E5E5;
    --accent-cyan: #00FFB9;
    --color-snow: #FFFFFF;
    --board-bg: #111111;
    --flap-bg: #222222;
    --flap-text: var(--text-stone);
    --border-color: #333333;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-main);
    color: var(--color-snow);
    font-family: 'Arial', sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    overflow-x: hidden;
}

#controls-container {
    padding: 2rem;
    width: 100%;
    max-width: 800px;
    text-align: center;
}

h1 {
    color: var(--accent-cyan);
    margin-bottom: 1.5rem;
    font-size: 2.5rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    align-items: center;
}

textarea {
    width: 100%;
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--accent-cyan);
    border: 2px solid var(--accent-cyan);
    padding: 1rem;
    font-family: 'Courier New', Courier, monospace;
    font-size: 1.5rem;
    resize: none;
    line-height: 1.5;
    border-radius: 4px;
    text-transform: uppercase;
}

textarea:focus {
    outline: none;
    box-shadow: 0 0 15px rgba(0, 255, 185, 0.5);
}

button {
    background-color: var(--accent-cyan);
    color: var(--bg-main);
    border: 2px solid var(--accent-cyan);
    padding: 1rem 3rem;
    font-size: 1.5rem;
    font-weight: bold;
    cursor: pointer;
    text-transform: uppercase;
    border-radius: 4px;
    transition: background-color 0.2s, transform 0.1s, color 0.2s;
    box-shadow: 0 4px 6px rgba(0,0,0,0.3);
}

button:hover {
    background-color: #00cc94;
    border-color: #00cc94;
}

button:active {
    transform: scale(0.98);
    box-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.button-group {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    width: 100%;
    flex-wrap: wrap;
}

button.secondary-btn {
    background-color: transparent;
    color: var(--accent-cyan);
}

button.secondary-btn:hover {
    background-color: rgba(0, 255, 185, 0.1);
}

.hints {
    margin-top: 1.5rem;
    color: var(--siemens-stone);
    font-style: italic;
    opacity: 0.7;
}

.template-bar {
    margin-top: 1.5rem;
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

.template-label {
    color: var(--accent-cyan);
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    opacity: 0.7;
}

.tpl-btn {
    padding: 0.5rem 1.2rem;
    font-size: 0.9rem;
    background-color: transparent;
    color: var(--accent-cyan);
    border: 1px solid var(--accent-cyan);
    box-shadow: none;
}

.tpl-btn:hover {
    background-color: rgba(0,255,185,0.1);
    border-color: var(--accent-cyan);
}

.tpl-btn.active {
    background-color: var(--accent-cyan);
    color: var(--bg-main);
}

/* Themes */
body.theme-siemens {
    --bg-main: #000028;
    --accent-cyan: #00BEDC;
    --flap-bg: #001a33;
    --flap-text: #00BEDC;
    --board-bg: #000d1a;
    --border-color: #003355;
}

body.theme-amber {
    --bg-main: #1a0d00;
    --accent-cyan: #FFB000;
    --flap-bg: #1f1000;
    --flap-text: #FFB000;
    --board-bg: #0d0800;
    --border-color: #3d2200;
}

body.theme-green {
    --bg-main: #001a00;
    --accent-cyan: #33FF33;
    --flap-bg: #001400;
    --flap-text: #33FF33;
    --board-bg: #000d00;
    --border-color: #004400;
}

/* Fullscreen Wrapper Logic */
#fullscreen-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    /* On regular view, leave some space. On fullscreen, take 100% */
    padding: 2rem;
}

:fullscreen #fullscreen-wrapper {
    padding: 0;
    width: 100vw;
    height: 100vh;
    background-color: #000;
}

:fullscreen #display-container {
    max-width: none;
    width: 100vw;
    height: 100vh;
    padding: 15px;
}

/* 1024x600 Board optimizations */
#display-container {
    width: 100%;
    max-width: 1024px;
    aspect-ratio: 1024 / 600;
    
    /* Simulate a thick industrial metallic/plastic casing */
    background-color: #0d0d0d;
    border: 12px solid #2b2b2b;
    border-top-color: #444;
    border-left-color: #333;
    border-bottom-color: #111;
    border-right-color: #222;
    border-radius: 12px;
    
    /* Double depth shadow */
    box-shadow: 
        0 15px 40px rgba(0, 0, 0, 0.8),
        inset 0 10px 20px rgba(0, 0, 0, 0.9),
        inset 0 0 10px rgba(0, 0, 0, 1);
        
    padding: 2.5%;
    display: flex;
}

/* Container query for resizing the text naturally */
.board {
    display: grid;
    grid-template-columns: repeat(18, 1fr);
    grid-template-rows: repeat(5, 1fr);
    gap: 0.5%;
    width: 100%;
    height: 100%;
    container-type: size;
    
    /* Back plate frame styling */
    background-color: #0f0f0f;
    padding: 0.6%;
    border: 3px solid #1a1a1a;
    border-radius: 6px;
    box-shadow: inset 0 0 15px rgba(0,0,0,1);
}

.flap-wrapper {
    background-color: var(--border-color);
    padding: 2px;
    border-radius: 4px;
    width: 100%;
    height: 100%;
}

.flap {
    position: relative;
    width: 100%;
    height: 100%;
    background-color: var(--flap-bg);
    font-family: 'Oswald', sans-serif;
    font-weight: 700;
    perspective: 1000px;
    border-radius: 3px;
    box-shadow: inset 0 0 10px rgba(0,0,0,0.8);
}

.flap-half {
    position: absolute;
    left: 0;
    width: 100%;
    height: 50%;
    background-color: var(--flap-bg);
    overflow: hidden;
    color: var(--flap-text);
    backface-visibility: hidden;
}

.flap-half.top {
    top: 0;
    border-bottom: 2px solid var(--board-bg);
    border-radius: 3px 3px 0 0;
}

.flap-half.bottom {
    bottom: 0;
    border-radius: 0 0 3px 3px;
}

/* Positioning the character text perfectly */
.flap-half span {
    position: absolute;
    left: 0;
    width: 100%;
    height: 200%; /* Spans both halves */
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 15cqh; /* 15% of the total board height gives perfect scaling */
    text-shadow: 2px 2px 4px rgba(0,0,0,0.8);
}

.flap-half.top span {
    top: 0;
}

.flap-half.bottom span {
    bottom: 0;
}

/* Animation Classes */
.flip-top {
    transform-origin: bottom;
    z-index: 2;
    animation: flipDownTop 0.04s ease-in forwards;
}

.flip-bottom {
    transform-origin: top;
    z-index: 2;
    transform: rotateX(90deg);
    animation: flipDownBottom 0.04s ease-out 0.04s forwards;
}

@keyframes flipDownTop {
    0% { transform: rotateX(0deg); }
    100% { transform: rotateX(-90deg); filter: brightness(0.5); }
}

@keyframes flipDownBottom {
    0% { transform: rotateX(90deg); filter: brightness(0.5); }
    100% { transform: rotateX(0deg); filter: brightness(1); }
}