:root {
    --game-primary-bg: #f3e5f5; /* ม่วงอ่อน */
    --game-secondary-bg: #FFFFFF;
    --game-text-color: #333;
    --game-accent-color1: #8E24AA; /* ม่วงเข้ม */
    --game-accent-color2: #FDD835; /* เหลือง */
    --game-button-color: #5E35B1; /* ม่วงน้ำเงิน */
    --font-family-game: 'Kanit', sans-serif;
}

body {
    font-family: var(--font-family-game);
    margin: 0;
    background-color: var(--game-primary-bg);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    color: var(--game-text-color);
    overflow: hidden;
}

.game-container {
    width: 100%;
    max-width: 1000px;
    height: 95vh;
    max-height: 750px;
    background-color: var(--game-secondary-bg);
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.game-header {
    padding: 12px 20px;
    background-color: var(--game-accent-color1);
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;
}
.game-header h1 { margin: 0; font-size: 1.6em; }
.back-to-activities-btn {
    color: white; text-decoration: none; font-size: 0.9em;
    padding: 7px 10px; background-color: rgba(255,255,255,0.15);
    border-radius: 5px; transition: background-color 0.3s;
}
.back-to-activities-btn:hover { background-color: rgba(255,255,255,0.3); }

.game-area {
    flex-grow: 1;
    padding: 15px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.game-status { text-align: center; margin-bottom: 10px; }
.game-status h2 { margin: 0 0 10px 0; font-size: 1.4em; color: var(--game-accent-color1); }
.progress-bar-container { width: 100%; height: 15px; background-color: #E0E0E0; border-radius: 10px; overflow: hidden; }
.progress-bar-fill { height: 100%; background-color: var(--game-accent-color2); border-radius: 10px; transition: width 0.5s ease; }

.mascot-instruction { display: flex; align-items: center; background-color: #F9FBE7; border-radius: 10px; padding: 10px; margin-bottom: 15px; border-left: 5px solid var(--game-accent-color2); }
.mascot-instruction img { height: 50px; width: auto; margin-right: 15px; border-radius: 50%; object-fit: cover;}
.mascot-instruction p { margin: 0; font-size: 0.95em; }

.matchup-board {
    display: flex;
    gap: 20px;
    flex-grow: 1;
    overflow: hidden;
}

.column {
    flex: 1;
    padding: 10px;
    background-color: #f5f5f5;
    border-radius: 10px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

/* --- Drop Zone Styling (สำคัญ) --- */
.drop-zone {
    background-color: #fff;
    border: 2px dashed #ccc;
    border-radius: 8px;
    padding: 10px;
    min-height: 60px;
    display: flex;
    justify-content: space-between; /* จัด content และ placeholder ให้อยู่คนละฝั่ง */
    align-items: center;
    transition: background-color 0.3s, border-color 0.3s;
}
.drop-zone.drag-over {
    background-color: #e3f2fd;
    border-color: var(--game-button-color);
}
.drop-zone.correct {
    border-style: solid;
    border-color: #66BB6A; /* Green */
    background-color: #E8F5E9;
}
.drop-zone.correct .draggable-card { /* การ์ดที่ลากมาวางแล้ว */
    border-color: #66BB6A;
    background-color: #fff;
    width: 60%; /* กำหนดขนาดการ์ดที่วางแล้ว */
    padding: 10px;
}

.drop-zone-content {
    display: flex;
    align-items: center;
    gap: 10px; /* ระยะห่างระหว่างไอคอนกับข้อความ */
}
.drop-zone-icon {
    width: 40px;
    height: 40px;
    object-fit: contain;
    flex-shrink: 0; /* ไม่ให้ไอคอนหด */
}
.drop-zone-term {
    font-weight: bold;
}
.drop-zone-placeholder {
    width: 60%;
    height: 100%;
    background-color: #e0e0e0;
    border-radius: 8px;
    display: flex;
    justify-content: center;
    align-items: center;
    color: #9e9e9e;
    font-size: 0.9em;
    padding: 10px;
    box-sizing: border-box;
}

/* --- Draggable Card Styling --- */
.draggable-card {
    background-color: #fff;
    border: 2px solid #bdbdbd;
    border-radius: 8px;
    padding: 15px;
    cursor: grab;
    user-select: none;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: box-shadow 0.2s, transform 0.2s;
    font-size: 0.9em;
}
.draggable-card:hover {
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
    transform: translateY(-2px);
}
.draggable-card.dragging {
    opacity: 0.5;
    cursor: grabbing;
    box-shadow: 0 8px 16px rgba(0,0,0,0.2);
}
.draggable-card.dropped {
    cursor: default;
    box-shadow: none;
    transform: none;
}

.round-complete {
    text-align: center;
    padding: 20px;
    background-color: rgba(232, 245, 233, 0.95);
    border-radius: 10px;
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    z-index: 10;
}

.modal { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0,0,0,0.6); display: flex; justify-content: center; align-items: center; z-index: 100; }
.modal-content { background: white; padding: 30px; border-radius: 15px; text-align: center; }
.modal-buttons { display: flex; gap: 10px; margin-top: 20px; }

.game-btn {
    background-color: var(--game-button-color); color: white; border: none;
    padding: 12px 20px; border-radius: 8px; font-size: 1.1em; cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
}
.game-btn:hover { background-color: #4527A0; transform: scale(1.02); }
.game-btn.secondary { background-color: #9E9E9E; }

.hidden { display: none !important; }