@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;600;800&display=swap');

:root {
    --bg-color: #020617;
    --text-color: #ffffff;
    --border-color: #1e293b;
    --header-bg: rgba(15, 17, 32, 0.8);
    --tile-bg: rgba(30, 41, 59, 0.5);
    --tile-border: #334155;
    --tile-active-border: #94a3b8;
    --key-bg: #334155;
    --key-hover: #475569;
    
    --color-correct: #22c55e; /* Green */
    --color-present: #eab308; /* Yellow */
    --color-absent: #ffffff; /* White for board tiles */
    --color-absent-key: #3f3f46; /* Dark grey for keyboard keys */
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Inter', sans-serif;
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    user-select: none;
}

/* Header */
header {
    padding: 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--header-bg);
    backdrop-filter: blur(12px);
    z-index: 20;
    flex-shrink: 0;
}

.header-btn {
    padding: 0.5rem;
    border-radius: 0.5rem;
    background: transparent;
    border: none;
    cursor: pointer;
    color: #94a3b8;
    transition: background-color 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.header-btn:hover {
    background-color: #1e293b;
}

.title {
    font-size: 1.25rem;
    font-weight: 900;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0;
}

.title-icon {
    color: var(--color-correct);
}

/* Game Board */
.game-container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    overflow-y: auto;
}

.board {
    display: grid;
    grid-template-rows: repeat(6, 1fr);
    gap: 6px;
    width: 100%;
    max-width: 350px;
    aspect-ratio: 5/6;
}

.row {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 6px;
}

.tile {
    border: 2px solid var(--tile-border);
    background-color: var(--tile-bg);
    border-radius: 0.5rem;
    font-size: 2rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-transform: uppercase;
    transition: transform 0.6s, background-color 0.6s, border-color 0.6s, color 0.6s;
    backface-visibility: hidden;
}

/* Tile States */
.tile.active {
    border-color: var(--tile-active-border);
    animation: pop 0.1s;
}

.tile.correct {
    background-color: var(--color-correct);
    border-color: transparent;
}

.tile.present {
    background-color: var(--color-present);
    border-color: transparent;
    color: black;
}

.tile.absent {
    background-color: var(--color-absent);
    border-color: transparent;
    color: black;
}

/* Keyboard */
.keyboard-container {
    padding: 0.5rem;
    padding-bottom: 1.5rem;
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
    flex-shrink: 0;
}

.keyboard {
    display: flex;
    flex-direction: column;
    gap: 6px;
    width: 100%;
}

.keyboard-row {
    display: flex;
    justify-content: center;
    gap: 4px;
    width: 100%;
}

.key {
    flex: 1;
    height: 50px;
    border-radius: 4px;
    background-color: var(--key-bg);
    border: none;
    color: white;
    font-weight: 700;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background-color 0.2s;
    text-transform: uppercase;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.key:active {
    transform: translateY(1px);
    box-shadow: none;
}

.key:hover {
    background-color: var(--key-hover);
}

.key.wide {
    flex: 1.5;
    font-size: 0.75rem;
}

/* Key States */
.key.correct {
    background-color: var(--color-correct);
    color: white;
}

.key.present {
    background-color: var(--color-present);
    color: black;
}

.key.absent {
    background-color: var(--color-absent-key);
    color: #71717a;
}

/* Toast */
.toast {
    position: fixed;
    top: 12%;
    left: 50%;
    transform: translateX(-50%);
    background-color: white;
    color: black;
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: bold;
    box-shadow: 0 4px 6px rgba(0,0,0,0.3);
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
    z-index: 50;
    font-size: 0.9rem;
}

.toast.show {
    opacity: 1;
}

/* Animations */
.flip {
    animation: flip 0.6s ease forwards;
}

@keyframes flip {
    0% { transform: rotateX(0); }
    50% { transform: rotateX(90deg); }
    100% { transform: rotateX(0); }
}

.shake {
    animation: shake 0.5s;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-4px); }
    20%, 40%, 60%, 80% { transform: translateX(4px); }
}

@keyframes pop {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

@media (min-width: 768px) {
    .board {
        gap: 8px;
    }
    .row {
        gap: 8px;
    }
    .tile {
        border-radius: 0.75rem;
        font-size: 2.25rem;
    }
    .key {
        height: 58px;
        font-size: 1rem;
    }
    .keyboard-row {
        gap: 6px;
    }
    .header-btn:hover {
        background-color: #1e293b;
    }
}