:root {
    /* Πολύ πιο ζωντανά, έντονα και παιδικά χρώματα */
    --primary-color: #FF1E56;
    --primary-color-hover: #FF4C79;
    --secondary-color: #00E676;
    --secondary-color-hover: #69F0AE;
    --tertiary-color: #FF9100;
    --tertiary-color-hover: #FFAB40;
    --quaternary-color: #00B0FF;
    --quaternary-color-hover: #40C4FF;
    --bg-gradient: linear-gradient(135deg, #FFE259 0%, #FFA751 100%);
    --card-bg: rgba(255, 255, 255, 0.95);
    --text-color: #2D3436;
    --correct-color: #00E676;
    --wrong-color: #FF1E56;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Nunito', sans-serif;
}

body {
    background: var(--bg-gradient);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--text-color);
    overflow: hidden;
    padding: 10px;
}

/* Πιο στρογγυλεμένο και "παχουλό" container */
.app-container {
    background: var(--card-bg);
    width: 100%;
    max-width: 900px; /* Αυξήθηκε για να χωράει τα 2 boards */
    min-height: 80vh;
    border-radius: 40px;
    padding: 1.2rem;
    box-shadow: 0 15px 35px rgba(0,0,0,0.15), inset 0 0 20px rgba(255,255,255,1);
    border: 6px solid white;
    text-align: center;
    position: relative;
    z-index: 10;
    display: flex;
    flex-direction: column;
}

/* Αρχική Οθόνη */
.start-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
}

.mode-options {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 2rem;
    width: 100%;
    max-width: 400px;
}

.mode-btn {
    background: white;
    border: 4px solid #6C5CE7;
    border-radius: 20px;
    padding: 1rem;
    font-size: 1.3rem;
    font-weight: 800;
    color: #6C5CE7;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.mode-btn .icon {
    font-size: 2rem;
}

.mode-btn:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 10px 20px rgba(0,0,0,0.15);
    background: #F8F9FA;
}

.mode-btn:active {
    transform: translateY(2px);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.game-container {
    display: flex;
    flex-direction: row;
    gap: 2rem;
    justify-content: center;
    align-items: center;
    flex: 1;
    width: 100%;
    position: relative;
}

.hidden {
    display: none !important;
}

.home-btn {
    position: absolute;
    top: -10px;
    left: 0;
    background: #FF9100;
    color: white;
    border: none;
    border-radius: 15px;
    padding: 0.5rem 1rem;
    font-weight: bold;
    cursor: pointer;
    box-shadow: 0 4px 0px #CC7400;
    z-index: 100;
}

.home-btn:hover {
    transform: translateY(-2px);
}

.home-btn:active {
    transform: translateY(2px);
    box-shadow: 0 2px 0px #CC7400;
}

/* Game Modes Layouts */
.mode-single {
    max-width: 500px;
    margin: 0 auto;
}

.mode-tablet {
    flex-direction: column-reverse; /* Το player 1 είναι κάτω, το player 2 πάνω */
    justify-content: space-between;
}

.mode-tablet .player-board:nth-child(2) {
    /* Το πάνω board γυρνάει 180 μοίρες */
    transform: rotate(180deg);
}

.mode-board {
    flex-direction: row;
}

.player-board {
    background: rgba(255,255,255,0.5);
    border-radius: 30px;
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 300px;
    max-width: 450px;
    border: 3px dashed rgba(108, 92, 231, 0.3);
}

@keyframes titleBounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

header h1 {
    font-size: 1.8rem;
    font-weight: 900;
    color: #6C5CE7;
    margin-bottom: 0.2rem;
    text-shadow: 3px 3px 0px rgba(255,255,255,1), 5px 5px 0px rgba(0,0,0,0.1);
    animation: titleBounce 2s infinite ease-in-out;
}

header p {
    font-size: 1rem;
    font-weight: 800;
    color: #2D3436;
    margin-bottom: 0.5rem;
}

.score-board {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1.2rem;
}

.score-badge {
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-size: 1.1rem;
    font-weight: 800;
    box-shadow: 0 4px 0px rgba(0,0,0,0.1);
}

.score-badge.correct {
    background: #E8F8F5;
    color: var(--correct-color);
    border: 3px solid var(--correct-color);
}

.score-badge.wrong {
    background: #FDEDEC;
    color: var(--wrong-color);
    border: 3px solid var(--wrong-color);
}

.game-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

/* Πιο μικρή κάρτα με animation για να μην πιάνει όλη την οθόνη */
@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-8px); }
    100% { transform: translateY(0px); }
}

.word-card {
    background: #FFFFFF;
    border: 5px dashed #FF9100;
    border-radius: 20px;
    padding: 0.5rem;
    width: 100%;
    font-size: 2.6rem;  /* Μικρότερο από 4rem που ήταν */
    font-weight: 900;
    letter-spacing: 2px;
    color: #2D3436;
    text-shadow: 2px 2px 0px #FFE259, 4px 4px 0px rgba(0,0,0,0.1); /* Τονισμένη λέξη με σκιά/χρώμα */
    transition: all 0.3s ease;
    min-height: 70px; /* Μικρότερο ύψος */
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 8px 15px rgba(0,0,0,0.1);
    animation: float 3s ease-in-out infinite;
}

.word-article {
    margin-right: 15px; /* Απόσταση από τη λέξη */
    color: #6C5CE7; /* Ελαφρώς διαφορετικό χρώμα για να ξεχωρίζει */
}

.missing {
    color: var(--wrong-color);
    border-bottom: 5px solid var(--wrong-color);
    display: inline-block;
    min-width: 35px;
    text-align: center;
    padding: 0 4px;
    margin-left: 2px;
}

.missing.filled-correct {
    color: var(--correct-color);
    border-bottom-color: var(--correct-color);
    animation: pop-in 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes pop-in {
    0% { transform: scale(0.5); opacity: 0; }
    80% { transform: scale(1.2); }
    100% { transform: scale(1); opacity: 1; }
}
.pop-in {
    animation: pop-in 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.feedback-message {
    font-size: 1.3rem;
    font-weight: 900;
    min-height: 30px;
}

.feedback-message.success {
    color: var(--correct-color);
}

.feedback-message.error {
    color: var(--wrong-color);
}

/* Μικρότερα κουμπιά για να χωρούν πιο εύκολα σε κινητά και tablets */
@keyframes subtleWiggle {
    0% { transform: rotate(0deg); }
    25% { transform: rotate(-2deg); }
    50% { transform: rotate(0deg); }
    75% { transform: rotate(2deg); }
    100% { transform: rotate(0deg); }
}

.options-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
}

.option-btn {
    border: 4px solid rgba(255,255,255,0.8);
    border-radius: 18px;
    padding: 0.6rem 1rem;
    font-size: 1.5rem;
    font-weight: 900;
    color: white;
    cursor: pointer;
    transition: transform 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.2s, opacity 0.2s;
    box-shadow: 0 5px 0 rgba(0,0,0,0.15);
    text-shadow: 2px 2px 0px rgba(0,0,0,0.3);
    animation: subtleWiggle 3s infinite ease-in-out;
    flex: 1 1 30%; /* Will try to fit 3 per row */
    min-width: 80px;
}

.option-btn:active {
    transform: translateY(6px) !important;
    box-shadow: 0 0 0 rgba(0,0,0,0.15);
}

.option-btn:hover:not(:disabled) {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 10px 0 rgba(0,0,0,0.15);
}

.option-btn[data-ending="ι"] { background: var(--primary-color); box-shadow: 0 6px 0 var(--primary-color-hover); }
.option-btn[data-ending="η"] { background: var(--secondary-color); box-shadow: 0 6px 0 var(--secondary-color-hover); }
.option-btn[data-ending="ει"] { background: var(--tertiary-color); box-shadow: 0 6px 0 var(--tertiary-color-hover); }
.option-btn[data-ending="οι"] { background: var(--quaternary-color); box-shadow: 0 6px 0 var(--quaternary-color-hover); }
.option-btn[data-ending="ω"] { background: #9B59B6; box-shadow: 0 6px 0 #8E44AD; }
.option-btn[data-ending="ο"] { background: #FFB142; box-shadow: 0 6px 0 #CC8E35; }

/* Animation για το σωστό κουμπί όταν βρεθεί */
@keyframes pulse-btn {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}
.pulse-btn {
    animation: pulse-btn 1s infinite;
}

.next-btn {
    background: #6C5CE7;
    color: white;
    border: 4px solid white;
    border-radius: 20px;
    padding: 0.6rem 1.2rem;
    font-size: 1.2rem;
    font-weight: 900;
    cursor: pointer;
    margin-top: 0.3rem;
    transition: all 0.3s ease;
    box-shadow: 0 5px 0 rgba(0,0,0,0.2);
    width: 100%;
    animation: titleBounce 2s infinite ease-in-out;
}

.next-btn:hover {
    background: #4834D4;
    transform: translateY(-2px);
}

.next-btn:active {
    transform: translateY(4px);
    box-shadow: 0 2px 0 rgba(0,0,0,0.2);
}

.next-btn.hidden {
    display: none;
    animation: none;
}

/* Animations Κάρτας */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-10px) rotate(-2deg); }
    20%, 40%, 60%, 80% { transform: translateX(10px) rotate(2deg); }
}

.shake {
    animation: shake 0.6s cubic-bezier(.36,.07,.19,.97) both;
    border-color: var(--wrong-color);
}

@keyframes pulse-green {
    0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(46, 213, 115, 0.7); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); box-shadow: 0 0 0 20px rgba(46, 213, 115, 0); }
}

.correct-anim {
    animation: pulse-green 0.6s ease-in-out;
    border-color: var(--correct-color);
    background-color: #E8F8F5;
}

#confetti-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

/* Responsive updates for very small screens */
@media (max-width: 480px) {
    header h1 { font-size: 1.5rem; }
    header p { font-size: 0.9rem; margin-bottom: 0.4rem; }
    .word-card { font-size: 2.2rem; min-height: 60px; padding: 0.4rem; }
    .option-btn { font-size: 1.3rem; padding: 0.5rem; grid-gap: 0.4rem; }
    .app-container { padding: 0.8rem; border-width: 4px; border-radius: 25px; }
    .score-badge { font-size: 0.9rem; padding: 0.3rem 0.6rem; }
}