/* นำเข้าฟอนต์ Kanit จาก Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Kanit:wght@300;400;500;600&display=swap');

:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --success-color: #10b981;
    --success-hover: #059669;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
}

body {
    font-family: 'Kanit', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 20px;
    box-sizing: border-box;
}

.container {
    background-color: var(--card-bg);
    padding: 35px;
    border-radius: 16px;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
    width: 100%;
    max-width: 600px;
    box-sizing: border-box;
}

/* ส่วนหัวและโลโก้ */
.logo-container {
    text-align: center;
    margin-bottom: 20px;
}

.logo {
    max-height: 70px;
    object-fit: contain;
}

h1 {
    font-size: 26px;
    font-weight: 600;
    color: var(--text-main);
    text-align: center;
    margin-top: 0;
    margin-bottom: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

h1 img {
    object-fit: contain;
}

/* ฟอร์มและอินพุต */
.input-group {
    margin-bottom: 20px;
    text-align: left;
}

.input-group label {
    display: block;
    font-size: 15px;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-main);
}

select, input[type="number"] {
    width: 100%;
    padding: 12px 16px;
    font-family: 'Kanit', sans-serif;
    font-size: 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: #fff;
    color: var(--text-main);
    box-sizing: border-box;
    transition: all 0.2s ease-in-out;
}

select:focus, input[type="number"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

/* การจัดรูปแบบตารางผลลัพธ์ */
.table-container {
    margin-top: 30px;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    background: #fff;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 15px;
}

th {
    background-color: #f1f5f9;
    color: var(--text-muted);
    font-weight: 500;
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-main);
}

tr:last-child td {
    border-bottom: none;
}

/* สีพื้นหลังพิเศษสำหรับสรุปผล */
tr[style*="background:#fdf2e2;"] {
    background-color: #fefce8 !important; /* เปลี่ยนเป็นสีเหลืองพาสเทลละมุนตา */
}

tr[style*="background:#fdf2e2;"] td:nth-child(3) {
    font-weight: 600;
}

hr {
    border: 0;
    height: 1px;
    background: var(--border-color);
    margin: 25px 0;
}

/* ส่วนแสดงข้อความผลลัพธ์เพิ่มเติม */
.result {
    margin-top: 15px;
    padding: 12px 16px;
    border-radius: 8px;
    background-color: #f8fafc;
    border-left: 4px solid var(--primary-color);
    font-size: 14px;
    color: var(--text-muted);
    text-align: left;
}

/* สไตล์ปุ่มกด */
#exportBtn {
    width: 100%;
    padding: 14px 20px;
    background-color: var(--success-color);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    font-family: 'Kanit', sans-serif;
    transition: all 0.2s ease;
    box-shadow: 0 4px 6px -1px rgba(16, 185, 129, 0.2);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    box-sizing: border-box;
}

#exportBtn:hover {
    background-color: var(--success-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 12px -2px rgba(16, 185, 129, 0.3);
}

#exportBtn:active {
    transform: translateY(0);
}

/* ปุ่ม Back to Top */
#backToTopBtn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 99;
    border: none;
    outline: none;
    background-color: var(--primary-color);
    color: white;
    cursor: pointer;
    padding: 12px 20px;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 500;
    font-family: 'Kanit', sans-serif;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
    transition: all 0.2s ease-in-out;
}

#backToTopBtn:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
}
/* สไตล์ปุ่มกด */
#copyResultBtn {
    width: 100%;
    padding: 14px 20px;
    background-color: var(--success-color);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    font-family: 'Kanit', sans-serif;
    transition: all 0.2s ease;
    box-shadow: 0 4px 6px -1px rgba(16, 185, 129, 0.2);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    box-sizing: border-box;
}

#copyResultBtn:hover {
    background-color: var(--success-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 12px -2px rgba(16, 185, 129, 0.3);
}