* {
    box-sizing: border-box;
    user-select: none;
}
body {
    margin: 0;
    padding: 0;
    background: linear-gradient(to bottom, #0f2027, #203a43, #2c5364);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    color: white;
}
header {
    text-align: center;
    margin-top: 10px;
}
h1 { 
    margin: 5px 0; 
    font-size: 24px; 
    text-shadow: 2px 2px 4px rgba(0,0,0,0.6); 
}
.stats { 
    font-size: 15px; 
    margin-bottom: 5px; 
    color: #cbd5e1; 
}

/* Bar Skor dan Kontrol */
.control-bar {
    display: flex;
    gap: 15px;
    align-items: center;
    margin-bottom: 10px;
}
.btn-utility {
    background: #f59e0b;
    color: #1e293b;
    border: none;
    padding: 6px 14px;
    font-weight: bold;
    border-radius: 20px;
    cursor: pointer;
    box-shadow: 0 4px 6px rgba(0,0,0,0.3);
    transition: background 0.2s, transform 0.1s;
}
.btn-utility:hover { 
    background: #d97706; 
}
.btn-utility:active { 
    transform: scale(0.95); 
}

/* Slot Penampung Atas */
#slot-container {
    width: 290px;
    height: 75px;
    background-color: rgba(0, 0, 0, 0.6);
    border: 3px solid #5c3a21;
    border-radius: 10px;
    display: flex;
    justify-content: flex-start;
    align-items: center;
    padding: 5px;
    gap: 8px;
    margin-bottom: 15px;
    box-shadow: inset 0 0 15px rgba(0,0,0,0.9);
}

/* Area Papan Mahjong */
#game-board {
    position: relative;
    width: 400px;
    height: 520px;
    background-color: rgba(0, 0, 0, 0.2);
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.7);
    border: 1px solid rgba(255,255,255,0.05);
}

/* Kartu Mahjong dengan Efek 3D Tebal Miring */
.tile {
    position: absolute;
    width: 44px;
    height: 58px;
    background: #ffffff;
    border-radius: 4px;
    border-bottom: 5px solid #a3a3a3;
    border-right: 4px solid #c2c2c2;
    border-top: 1px solid #fff;
    border-left: 1px solid #fff;
    box-shadow: 3px 4px 6px rgba(0,0,0,0.4);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 24px;
    cursor: pointer;
    transition: transform 0.1s, opacity 0.15s, filter 0.2s, left 0.3s ease, top 0.3s ease;
}

.tile.locked {
    filter: brightness(0.55) grayscale(0.1);
    cursor: not-allowed;
    box-shadow: 1px 2px 3px rgba(0,0,0,0.5);
    transform: none !important;
}

.tile:hover:not(.locked) {
    transform: translateY(-3px);
    filter: brightness(1.15);
    box-shadow: 3px 7px 10px rgba(0,0,0,0.5);
}

/* Slot Kartu Atas */
.slot-tile {
    width: 46px;
    height: 56px;
    background: #ffffff;
    border-radius: 4px;
    border-bottom: 4px solid #a3a3a3;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 24px;
    box-shadow: 1px 2px 4px rgba(0,0,0,0.5);
    animation: popIn 0.2s forwards;
}

@keyframes popIn {
    0% { transform: scale(0.5); opacity: 0; }
    100% { transform: scale(1); opacity: 1; }
}

.slot-tile.destroying {
    animation: shatter 0.3s ease-out forwards;
    pointer-events: none;
}

@keyframes shatter {
    0% { transform: scale(1); opacity: 1; filter: brightness(1.5); }
    100% { transform: scale(0); opacity: 0; filter: brightness(2.5) blur(3px); }
}

.burst-particle {
    position: absolute;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    pointer-events: none;
    animation: flyAway 0.3s ease-out forwards;
}

@keyframes flyAway {
    0% { transform: translate(0, 0) scale(1); opacity: 1; }
    100% { transform: translate(var(--x), var(--y)) scale(0); opacity: 0; }
}

/* Pop-up Overlay */
.overlay {
    display: none;
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.85);
    z-index: 999;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}
.modal {
    background: #ffffff;
    color: #1e293b;
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 10px 25px rgba(0,0,0,0.5);
    max-width: 300px;
    width: 80%;
}
.modal h2 { margin-top: 0; color: #e11d48; }
.modal.win h2 { color: #16a34a; }

/* Desain Bintang */
.star-container {
    font-size: 32px;
    color: #e2e8f0;
    margin: 15px 0;
}
.star-container .fill {
    color: #fbbf24;
    text-shadow: 0 0 8px rgba(251,191,36,0.6);
}

.modal button {
    background: #2563eb;
    color: white;
    border: none;
    padding: 10px 22px;
    font-size: 16px;
    border-radius: 6px;
    cursor: pointer;
    margin-top: 15px;
    font-weight: bold;
}
.modal button:hover { background: #1d4ed8; }

/* ==========================================
   DESAIN FOOTER CASCADE TILES
   ========================================== */
footer {
    width: 100%;
    text-align: center;
    padding: 20px 10px;
    margin-top: auto; /* Memaksa footer tetap di bawah jika layar tinggi */
    font-size: 13px;
    color: #94a3b8;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    background-color: rgba(15, 32, 39, 0.5);
    backdrop-filter: blur(5px);
}

footer p {
    margin: 4px 0;
}

footer .brand-name {
    color: #f59e0b;
    font-weight: 600;
    letter-spacing: 0.5px;
}

/* ==========================================
   MODAL INFORMASI / PANDUAN GAME
   ========================================== */
.btn-info {
    background: #0ea5e9 !important; /* Warna biru informatif */
    color: white !important;
}
.btn-info:hover {
    background: #0284c7 !important;
}

.modal-info {
    max-width: 360px !important;
    width: 90% !important;
    text-align: left !important; /* Teks rata kiri agar rapi dibaca */
    max-height: 80vh;
    display: flex;
    flex-direction: column;
}

.modal-info h2 {
    text-align: center;
    color: #0ea5e9;
    margin-bottom: 10px;
}

.info-content {
    overflow-y: auto; /* Bisa di-scroll jika teksnya panjang di HP */
    font-size: 14px;
    line-height: 1.5;
    color: #334155;
    padding-right: 5px;
}

.info-content hr {
    border: 0;
    border-top: 1px solid #e2e8f0;
    margin: 10px 0;
}

.info-content ul {
    padding-left: 20px;
    margin: 5px 0;
}

.info-content li {
    margin-bottom: 5px;
}

.modal-info button {
    width: 100%;
    margin-top: 20px;
    background: #0ea5e9;
}
.modal-info button:hover {
    background: #0284c7;
}