:root {
    --green: #6aaa64;
    --dark-green: #538d4e;
    --yellow: #c9b458;
    --dark-yellow: #b59f3b;
    --grey: #787c7e;
    --dark-grey: #3a3a3c;
    --black: #121213;
    --white: #ffffff;
    --light-grey: #d3d6da;
    --border-color: #d3d6da;
    --header-height: 50px;
    --keyboard-height: 200px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--white);
    color: var(--black);
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 100vh;
    height: 100dvh;
    overflow: hidden;
    user-select: none;
    -webkit-user-select: none;
}

header {
    width: 100%;
    max-width: 500px;
    height: var(--header-height);
    border-bottom: 1px solid var(--light-grey);
    display: grid;
    grid-template-columns: 48px 1fr 48px;
    align-items: center;
    padding: 0 4px;
    flex-shrink: 0;
}

h1 {
    font-size: 24px;
    font-weight: 800;
    letter-spacing: 0.1rem;
    text-transform: uppercase;
    margin: 0;
    text-align: center;
}

#game-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    flex-grow: 1;
    width: 100%;
    max-width: 500px;
    padding-bottom: env(safe-area-inset-bottom);
    overflow: hidden;
}

#board-container {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-grow: 1;
    width: 100%;
    padding: 10px;
    overflow: hidden;
}

#board {
    display: flex;
    flex-direction: column;
    gap: 5px;
    width: 100%;
    height: 100%;
    justify-content: center;
}

.row {
    display: flex;
    justify-content: center;
    gap: 5px;
    width: 100%;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.row::-webkit-scrollbar {
    display: none;
}

.tile {
    --max-tile-size: 62px;
    --gap-count: calc(var(--word-length) - 1);
    --total-gap: calc(var(--gap-count) * 5px);
    --available-width: calc(100% - var(--total-gap));
    --calculated-size: calc(var(--available-width) / var(--word-length));
    
    width: min(var(--max-tile-size), var(--calculated-size));
    aspect-ratio: 1 / 1;
    flex-shrink: 0;
    border: 2px solid var(--border-color);
    display: inline-flex;
    justify-content: center;
    align-items: center;
    font-size: clamp(1rem, 5vw, 2rem);
    font-weight: 700;
    text-transform: uppercase;
    transition: background-color 0.2s, border-color 0.2s, color 0.2s;
}

.tile[data-state="toggled"] {
    border-color: var(--grey);
    animation: pop 0.1s linear 1;
}

.tile[data-state="correct"] {
    background-color: var(--green);
    border-color: var(--green);
    color: var(--white);
}

.tile[data-state="present"] {
    background-color: var(--yellow);
    border-color: var(--yellow);
    color: var(--white);
}

.tile[data-state="absent"] {
    background-color: var(--dark-grey);
    border-color: var(--dark-grey);
    color: var(--white);
}

/* Keyboard */
#keyboard {
    width: 100%;
    max-width: 500px;
    padding: 8px;
    flex-shrink: 0;
}

.keyboard-row {
    display: flex;
    justify-content: center;
    margin-bottom: 8px;
    width: 100%;
}

.key {
    font-family: inherit;
    font-weight: 700;
    border: 0;
    padding: 0;
    margin: 0 2px;
    height: 58px;
    border-radius: 4px;
    cursor: pointer;
    background-color: var(--light-grey);
    color: var(--black);
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    text-transform: uppercase;
    font-size: 14px;
    transition: transform 0.05s, background-color 0.1s;
}

.key.pressed {
    transform: scale(0.9);
    background-color: #bbb;
}

.key.large {
    flex: 1.5;
    font-size: 12px;
}

.key[data-state="correct"] {
    background-color: var(--green);
    color: var(--white);
}

.key[data-state="present"] {
    background-color: var(--yellow);
    color: var(--white);
}

.key[data-state="absent"] {
    background-color: var(--dark-grey);
    color: var(--white);
}

/* Toasts */
#toast-container {
    position: fixed;
    top: 10%;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    align-items: center;
    pointer-events: none;
}

.toast {
    background-color: var(--black);
    color: var(--white);
    padding: 12px 16px;
    border-radius: 4px;
    margin-bottom: 8px;
    font-weight: bold;
    opacity: 1;
    transition: opacity 0.5s ease-out;
}

.toast.fade-out {
    opacity: 0;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(2px);
    align-items: center;
    justify-content: center;
}

.modal.show {
    display: flex;
}

.modal-content {
    background-color: var(--white);
    padding: 24px;
    border: 1px solid var(--light-grey);
    width: 90%;
    max-width: 350px;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    text-align: center;
    animation: slideUp 0.3s ease-out;
}

.modal-body {
    margin: 16px 0;
}

.modal-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

@keyframes slideUp {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

#share-button, #reset-button-modal {
    background-color: var(--green);
    color: var(--white);
    border: none;
    padding: 14px 20px;
    font-size: 16px;
    font-weight: bold;
    border-radius: 8px;
    cursor: pointer;
    text-transform: uppercase;
    width: 100%;
}

#reset-button-header {
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

#reset-button-header svg {
    fill: var(--grey);
}

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

@keyframes shake {
    10%, 90% { transform: translate3d(-1px, 0, 0); }
    20%, 80% { transform: translate3d(2px, 0, 0); }
    30%, 50%, 70% { transform: translate3d(-4px, 0, 0); }
    40%, 60% { transform: translate3d(4px, 0, 0); }
}

.shake {
    animation: shake 0.5s cubic-bezier(.36,.07,.19,.97) both;
}

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

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

.flip-in {
    animation: flip-in 0.25s ease-in forwards;
}

.flip-out {
    animation: flip-out 0.25s ease-out forwards;
}

@keyframes bounce {
    0%, 20% { transform: translateY(0); }
    40% { transform: translateY(-30px); }
    50% { transform: translateY(5px); }
    60% { transform: translateY(-15px); }
    80% { transform: translateY(2px); }
    100% { transform: translateY(0); }
}

.bounce {
    animation: bounce 1s;
}

/* Responsive */
@media (max-height: 700px) {
    :root {
        --tile-size: 50px;
    }
    .key {
        height: 48px;
    }
}

@media (max-width: 400px) {
    :root {
        --tile-size: 45px;
    }
    .key {
        margin: 0 2px;
        font-size: 14px;
    }
    .key.large {
        font-size: 10px;
    }
}