:root {
    --primary-color: #dc2626;
    --line-color: #06C755;
    /* Chinese New Year Palette 🧧 */
    --metal-shine: #fbbf24;
    --metal-base: #dc2626;
    --metal-shadow: #991b1b;
    --gold-light: #fef3c7;
    --lucky-red: #fecaca;
}

body {
    font-family: 'Kanit', sans-serif;
    background: linear-gradient(180deg, #fef2f2 0%, #fff7ed 50%, #fffbeb 100%);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin: 0;
    padding: 20px;
    padding-top: 60px;
}

/* Chinese New Year Banner Flags 🏮 */
.cny-banner {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 50px;
    background: linear-gradient(90deg, #dc2626 0%, #b91c1c 50%, #dc2626 100%);
    display: flex;
    align-items: flex-start;
    justify-content: center;
    z-index: 1000;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(220, 38, 38, 0.4);
    border-bottom: 3px solid #fbbf24;
}

/* Firecracker Button 🧨 */
.firecracker-btn {
    position: fixed;
    top: 60px;
    left: 15px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(145deg, #fbbf24 0%, #dc2626 50%, #991b1b 100%);
    border: 3px solid #fbbf24;
    font-size: 24px;
    cursor: pointer;
    z-index: 1001;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(220, 38, 38, 0.5);
    transition: all 0.3s ease;
    animation: firecracker-pulse 2s ease-in-out infinite;
}

.firecracker-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(220, 38, 38, 0.7);
}

.firecracker-btn:active {
    transform: scale(0.95);
}

@keyframes firecracker-pulse {
    0%, 100% {
        box-shadow: 0 4px 15px rgba(220, 38, 38, 0.5);
    }
    50% {
        box-shadow: 0 4px 25px rgba(251, 191, 36, 0.8);
    }
}

/* Firecracker Container */
.firecracker-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 100;
    overflow: hidden;
}

/* Individual Firecracker */
.firecracker {
    position: absolute;
    font-size: 50px;
    animation: firecracker-explode 2s ease-out forwards;
    filter: drop-shadow(0 0 15px rgba(251, 191, 36, 1)) drop-shadow(0 0 30px rgba(220, 38, 38, 0.8));
    text-shadow: 0 0 20px rgba(251, 191, 36, 0.8);
}

@keyframes firecracker-explode {
    0% {
        transform: scale(0.5) rotate(0deg);
        opacity: 1;
    }
    20% {
        transform: scale(1.2) rotate(15deg);
        opacity: 1;
    }
    40% {
        transform: scale(1) rotate(-10deg);
        opacity: 1;
    }
    100% {
        transform: scale(0.3) rotate(360deg) translateY(100px);
        opacity: 0;
    }
}

/* Spark particles */
.spark {
    position: absolute;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    animation: spark-fly 1.2s ease-out forwards;
    box-shadow: 0 0 10px currentColor, 0 0 20px currentColor;
}

@keyframes spark-fly {
    0% {
        transform: scale(1);
        opacity: 1;
    }
    100% {
        transform: scale(0) translateY(50px);
        opacity: 0;
    }
}

.cny-flags {
    display: flex;
    gap: 20px;
    padding-top: 5px;
}

.flag {
    font-size: 28px;
    display: inline-block;
    transform-origin: top center;
    animation: flag-wave 2s ease-in-out infinite;
    filter: drop-shadow(0 3px 6px rgba(0, 0, 0, 0.3));
    cursor: default;
}

.flag-1, .flag-5, .flag-9, .flag-13 { animation-delay: 0s; }
.flag-2, .flag-6, .flag-10, .flag-14 { animation-delay: 0.15s; }
.flag-3, .flag-7, .flag-11, .flag-15 { animation-delay: 0.3s; }
.flag-4, .flag-8, .flag-12, .flag-16 { animation-delay: 0.45s; }

@keyframes flag-wave {
    0%, 100% {
        transform: rotate(-8deg) translateY(0);
    }
    25% {
        transform: rotate(8deg) translateY(2px);
    }
    50% {
        transform: rotate(-5deg) translateY(-1px);
    }
    75% {
        transform: rotate(5deg) translateY(1px);
    }
}

.login-card {
    width: 100%;
    max-width: 1100px;
    background: #ffffff;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 20px 50px rgba(220, 38, 38, 0.15);
    border: 1px solid #fecaca;
}

/* ส่วนซ้าย: Lucky Red & Gold Side */
.image-side {
    /* ไล่เฉดสีแดงมงคล-ทอง */
    background: linear-gradient(145deg, var(--metal-shine) 0%, var(--metal-base) 35%, var(--metal-base) 65%, var(--metal-shadow) 100%);
    color: white;
    padding: 3rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
    /* เพิ่มขอบนูนแบบ Bezel */
    box-shadow: 
        inset 3px 3px 6px rgba(251, 191, 36, 0.4), 
        inset -3px -3px 6px rgba(0, 0, 0, 0.3);
    border-right: 1px solid rgba(251, 191, 36, 0.3);
}

/* เพิ่มลายมังกรทอง */
.image-side::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(115deg, transparent 40%, rgba(251,191,36,0.15) 45%, rgba(251,191,36,0.15) 50%, transparent 55%);
    pointer-events: none;
}

.logo-img {
    max-width: 150px;
    height: auto;
    margin-bottom: 1.5rem;
    filter: drop-shadow(0 8px 15px rgba(0,0,0,0.2));
    z-index: 2;
}

.logo-img-lg {
    max-width: 250px;
    height: auto;
    /* margin-bottom: 1.5rem; */
    filter: drop-shadow(0 8px 15px rgba(0,0,0,0.3));
    filter: drop-shadow(0 8px 15px rgba(0,0,0,0.2));
    z-index: 2;
}

.qr-wrapper {
    /* สไตล์แบบกรอบทอง (Gold Frame) */
    background: rgba(251, 191, 36, 0.15);
    padding: 20px;
    border-radius: 24px;
    border: 2px solid rgba(251, 191, 36, 0.5);
    box-shadow: 
        inset 4px 4px 8px rgba(0, 0, 0, 0.2),
        0 0 20px rgba(251, 191, 36, 0.3);
    margin-bottom: 1.5rem;
    z-index: 2;
    backdrop-filter: blur(10px);
}

.qr-box {
    background: white;
    padding: 10px;
    border-radius: 14px;
    display: inline-block;
    box-shadow: 0 5px 15px rgba(0,0,0,0.15);
}

.line-btn {
    background-color: var(--line-color);
    color: white;
    border: none;
    padding: 12px 30px;
    border-radius: 12px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 4px 10px rgba(6, 199, 85, 0.3);
    z-index: 2;
}

.line-btn:hover {
    background-color: #05b34c;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(6, 199, 85, 0.4);
}

/* ส่วนขวา: ฟอร์ม Login */
.form-side {
    padding: 4rem;
    background: white;
    position: relative;
    overflow: hidden;
}

/* Chinese New Year Watermark 🧧 */
.form-side::before {
    content: "福";
    position: absolute;
    font-size: 320px;
    font-family: 'KaiTi', 'STKaiti', 'SimSun', serif;
    font-weight: bold;
    opacity: 0.06;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(180deg);
    color: #dc2626;
    pointer-events: none;
    z-index: 0;
}

.form-side::after {
    content: "🧧 🏮 🐉 🎊 🧧 🏮 🐉 🎊 🧧 🏮 🐉 🎊 🧧 🏮 🐉";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    font-size: 24px;
    letter-spacing: 30px;
    line-height: 80px;
    word-spacing: 40px;
    opacity: 0.08;
    overflow: hidden;
    white-space: normal;
    display: flex;
    flex-wrap: wrap;
    align-content: space-around;
    justify-content: center;
    padding: 20px;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(220, 38, 38, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 90% 80%, rgba(251, 191, 36, 0.1) 0%, transparent 40%),
        radial-gradient(circle at 80% 10%, rgba(220, 38, 38, 0.05) 0%, transparent 30%),
        radial-gradient(circle at 20% 90%, rgba(251, 191, 36, 0.08) 0%, transparent 35%);
    pointer-events: none;
    z-index: 0;
}

.form-side > * {
    position: relative;
    z-index: 1;
}

.form-label {
    font-size: 0.9rem;
    font-weight: 500;
    color: #4b5563;
}

.form-control {
    padding: 12px 16px;
    border-radius: 12px;
    border: 1.5px solid #fecaca;
    background-color: #fef2f2;
}

.form-control:focus {
    box-shadow: 0 0 0 4px rgba(220, 38, 38, 0.15);
    border-color: var(--primary-color);
    background-color: #fff;
}

.password-field-group {
    position: relative;
}

.btn-toggle-password {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: #9ca3af;
    cursor: pointer;
    padding: 5px;
    display: flex;
    align-items: center;
    z-index: 10;
}

.btn-submit {
    background: linear-gradient(135deg, var(--metal-shine) 0%, var(--primary-color) 50%, var(--metal-base) 100%);
    color: white;
    border: none;
    padding: 14px;
    border-radius: 12px;
    font-weight: 600;
    width: 100%;
    transition: all 0.3s ease;
}

.btn-submit:hover {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--metal-base) 50%, var(--metal-shadow) 100%);
    box-shadow: 0 10px 15px rgba(220, 38, 38, 0.3);
    color: white;
}

/* สำหรับมือถือ */
@media (max-width: 991.98px) {
    .image-side {
        padding: 3rem 1.5rem;
        border-right: none;
        border-bottom: 1px solid rgba(251, 191, 36, 0.3);
    }
    .form-side {
        padding: 2.5rem 1.5rem;
    }
    .login-card {
        border-radius: 16px;
        box-shadow: none;
        border: none;
    }
}

/* Chinese New Year Loader Animation 🧧 */
.cny-loader {
    display: inline-block;
    animation: lantern-swing 1s ease-in-out infinite;
    margin-right: 8px;
    filter: drop-shadow(0 0 5px rgba(251, 191, 36, 0.8));
}

@keyframes lantern-swing {
    0%, 100% {
        transform: rotate(-10deg) scale(1);
    }
    50% {
        transform: rotate(10deg) scale(1.1);
    }
}

.menu-card {
    transition: all 0.3s ease; /* เพิ่ม Transition ให้ลื่นไหล */
    cursor: pointer;
    border: 1px solid rgba(0,0,0,0.05);
}

/* เมื่อเอาเมาส์ชี้ (Hover) */
.menu-card:hover {
    transform: translateY(-5px); /* ขยับขึ้นเล็กน้อย */
    box-shadow: 0 .5rem 1rem rgba(225, 29, 72, 0.15)!important; /* เพิ่มเงา */
    border-color: #e11d48; /* เปลี่ยนสีขอบเป็นสี Valentine */
}

/* ขนาดกล่องไอคอน */
.icon-box {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px; /* ทำมุมโค้งมน */
    font-size: 1.5rem;
}

.text-primary {
    color: #e11d48 !important;
}

.text-info {
    color: #fb7185 !important;
}

.line-connect-btn {
    display: inline-flex; /* จัดเรียงไอคอนกับข้อความในแนวนอน */
    align-items: center; /* จัดให้อยู่กึ่งกลางแนวตั้ง */
    justify-content: center; /* จัดให้อยู่กึ่งกลางแนวนอน */
    
    background-color: #06C755; /* สีเขียวทางการของ LINE */
    color: white; /* สีข้อความ */
    
    padding: 12px 24px; /* ระยะห่างภายในปุ่ม (แนวตั้ง แนวนอน) */
    border-radius: 8px; /* ทำให้ขอบปุ่มโค้งมน */
    border: none; /* ไม่มีเส้นขอบ */
    
    font-size: 16px;
    font-weight: bold; /* ทำให้ตัวอักษรหนา */
    
    text-decoration: none; /* ลบเส้นใต้ของลิงก์ */
    cursor: pointer; /* เปลี่ยนเมาส์เป็นรูปมือเมื่อชี้ */
    
    transition: background-color 0.3s ease, transform 0.2s ease; /* เพิ่มอนิเมชันตอนเปลี่ยนสีและขนาด */
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.15); /* เพิ่มเงาเล็กน้อย */
}