:root {
    --primary: #2563eb;
    --primary-dark: #1e40af;
    --primary-gradient: linear-gradient(135deg, #3b82f6, #2563eb);
    --bg-color: #f0f4f8;
    --white: #ffffff;
    --text-main: #1e293b;
    --text-gray: #64748b;
    --border: #e2e8f0;
    --shadow: 0 10px 40px -10px rgba(37, 99, 235, 0.15);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Prompt', sans-serif;
    background-color: var(--bg-color);
    background-image: radial-gradient(#e0f2fe 1px, transparent 1px);
    background-size: 20px 20px;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    color: var(--text-main);
}

.login-wrapper {
    width: 100%;
    max-width: 420px;
    animation: slideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.login-card {
    background: var(--white);
    border-radius: 24px;
    padding: 40px 30px;
    box-shadow: var(--shadow);
    border: 1px solid rgba(255, 255, 255, 0.8);
    position: relative;
    overflow: hidden;
}

/* แถบสีด้านบน */
.login-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 6px;
    background: var(--primary-gradient);
}

/* Brand Logo */
.brand-section { text-align: center; margin-bottom: 30px; }
.logo-icon {
    width: 64px; height: 64px;
    background: var(--primary-gradient);
    color: white;
    border-radius: 18px;
    font-size: 32px;
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto 15px;
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.25);
}
.brand-section h1 { font-size: 24px; font-weight: 600; margin-bottom: 5px; }
.brand-section p { font-size: 14px; color: var(--text-gray); }

/* Form Styles */
.form-group { margin-bottom: 20px; }
.form-group label {
    display: block; font-size: 14px; font-weight: 500;
    margin-bottom: 8px; color: var(--text-main);
}

/* Container สำหรับช่อง input */
.input-container { position: relative; }

/* ไอคอนด้านซ้าย (อีเมล, กุญแจ) */
.input-container .icon {
    position: absolute; left: 16px; top: 50%; transform: translateY(-50%);
    color: #94a3b8; font-size: 18px; transition: 0.3s;
    z-index: 2; /* ให้อยู่เหนือ input */
}

/* สไตล์ของช่อง input ทั่วไป */
.input-container input {
    width: 100%;
    /* Padding: บน ขวา ล่าง ซ้าย */
    padding: 14px 16px 14px 48px; /* เว้นซ้าย 48px ให้ไอคอนด้านซ้าย */
    border: 1.5px solid var(--border);
    border-radius: 12px;
    font-size: 15px;
    background: #f8fafc;
    transition: all 0.3s ease;
    font-family: inherit;
    color: var(--text-main);
}

/* --- ส่วนที่เพิ่มมาสำหรับช่องรหัสผ่านโดยเฉพาะ --- */
/* ถ้าเป็นช่องรหัสผ่าน ให้เว้นขวาเพิ่มขึ้นเพื่อปุ่มลูกตา */
#passwordInput {
    padding-right: 45px; 
}

/* ปุ่มลูกตา (Toggle Password) */
.toggle-password {
    position: absolute; 
    right: 16px; 
    top: 50%; 
    transform: translateY(-50%);
    color: #94a3b8; 
    cursor: pointer; 
    padding: 5px; 
    transition: 0.3s;
    z-index: 3; /* ให้อยู่บนสุด */
}
.toggle-password:hover { color: var(--primary); }
/* ------------------------------------------- */


.input-container input:focus {
    outline: none;
    border-color: var(--primary);
    background: var(--white);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}
/* เมื่อ focus ที่ input ให้ไอคอนด้านซ้ายเปลี่ยนสี */
.input-container input:focus + .icon { color: var(--primary); }


.forgot-pass { text-align: right; margin-top: 8px; }
.forgot-pass a { font-size: 13px; color: var(--primary); text-decoration: none; font-weight: 500; }

.btn-login {
    width: 100%;
    padding: 15px;
    background: var(--primary-gradient);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 16px; font-weight: 600;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
    transition: transform 0.2s, box-shadow 0.2s;
    display: flex; align-items: center; justify-content: center; gap: 8px;
}
.btn-login:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4); }
.btn-login:active { transform: scale(0.98); }
.btn-login:disabled { opacity: 0.7; cursor: not-allowed; }

/* Divider */
.divider { text-align: center; margin: 25px 0; position: relative; }
.divider::before {
    content: ''; position: absolute; left: 0; right: 0; top: 50%;
    height: 1px; background: var(--border);
}
.divider span {
    background: var(--white); padding: 0 15px;
    position: relative; color: var(--text-gray); font-size: 13px;
}

.register-area { text-align: center; font-size: 14px; color: var(--text-gray); }
.register-area a { color: var(--primary); text-decoration: none; font-weight: 600; }

.footer-copy { margin-top: 30px; font-size: 12px; color: #cbd5e1; text-align: center; }

/* Animation */
@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Mobile Responsive */
@media (max-width: 480px) {
    body { padding: 0; background: var(--white); }
    .login-wrapper { max-width: 100%; height: 100vh; }
    .login-card {
        border-radius: 0; box-shadow: none; border: none;
        height: 100%; display: flex; flex-direction: column; justify-content: center;
    }
    .logo-icon { width: 72px; height: 72px; font-size: 36px; }
    .btn-login { padding: 16px; font-size: 17px; }
}