/* 1. Google Font (Kanit) */
@import url('https://fonts.googleapis.com/css2?family=Kanit:wght@300;400;500;700&display=swap');

/* 2. กำหนด Font หลักและชุดสี (Color Palette) */
:root {
    --gunmetal: #29393dff;
    --white: #fafcfcff;
    --antiflash-white: #f1f6f6ff;
    --antiflash-white-2: #e8ededff;
    --outer-space: #425257ff;
    --gunmetal-2: #14282fff;
    --rich-black: #07181dff;

    /* ไล่สี Gradient */
    --gradient-primary: linear-gradient(135deg, var(--gunmetal-2), var(--outer-space));
    --gradient-secondary: linear-gradient(135deg, var(--gunmetal), #5a7075);
    
    /* สีของ AdminLTE ที่ปรับตาม Theme */
    --admin-bg: var(--antiflash-white);
    --admin-text: var(--rich-black);
    --admin-card-bg: var(--white);
    --admin-card-header: var(--gradient-primary);
}

body {
    font-family: 'Kanit', sans-serif;
}

/* 3. สไตล์หน้า Public (Homepage & Login) */
.public-layout {
    background-color: var(--rich-black);
    color: var(--antiflash-white);
    overflow-x: hidden; /* สำหรับ Animation */
}

.public-navbar {
    background: rgba(7, 24, 29, 0.8);
    backdrop-filter: blur(10px);
}

.hero-section {
    min-height: 80vh;
    display: flex;
    align-items: center;
    background: var(--gradient-primary);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background-image: url('https://www.transparenttextures.com/patterns/cubes.png');
    opacity: 0.05;
    z-index: 1;
}

.hero-content {
    z-index: 2;
}

.feature-card {
    background-color: var(--gunmetal-2);
    border: 1px solid var(--outer-space);
    border-radius: 10px;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.5);
}

.feature-icon {
    font-size: 3rem;
    background: -webkit-linear-gradient(135deg, #f1f6f6ff, #a0b5bb);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 1rem;
}

/* 4. สไตล์ Login Form */
.login-card {
    background-color: var(--gunmetal-2);
    border: 1px solid var(--outer-space);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.form-control-dark {
    background-color: var(--outer-space);
    border-color: var(--gunmetal);
    color: var(--white);
}

.form-control-dark:focus {
    background-color: var(--outer-space);
    border-color: var(--antiflash-white-2);
    color: var(--white);
    box-shadow: 0 0 0 0.25rem rgba(241, 246, 246, 0.25);
}

/* 5. (ข้อ 4.5) สไตล์ปุ่ม Gradient */
.btn-gradient {
    background-image: var(--gradient-primary);
    border: none;
    color: var(--white);
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.btn-gradient:hover {
    color: var(--white);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
    filter: brightness(1.1);
}

.btn-gradient-secondary {
    background-image: var(--gradient-secondary);
    border: none;
    color: var(--white);
    transition: all 0.3s ease;
}
.btn-gradient-secondary:hover {
    color: var(--outer-space);
    filter: brightness(1.1);
}


/* 6. (ข้อ 4.4) สไตล์ AdminLTE (Light Theme) */
.admin-layout .content-wrapper {
    background-color: var(--admin-bg);
}

.admin-layout .main-header,
.admin-layout .main-sidebar {
    background-color: var(--gunmetal-2);
    color: var(--white);
}

.admin-layout .main-header .nav-link,
.admin-layout .nav-sidebar .nav-link {
    color: var(--antiflash-white);
}

.admin-layout .nav-sidebar .nav-link:hover,
.admin-layout .nav-sidebar .nav-item.menu-open > .nav-link,
.admin-layout .nav-sidebar .nav-link.active {
    background-color: var(--outer-space);
    color: var(--white);
}

.admin-layout .brand-link {
    color: var(--white);
}

.admin-layout .info-box {
    background-color: var(--admin-card-bg);
}

.admin-layout .card {
    background-color: var(--admin-card-bg);
    border: none;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

/* (ข้อ 4.5) Card Header แบบ Gradient */
.admin-layout .card-header.gradient-header {
    background-image: var(--admin-card-header);
    color: var(--white);
}

.admin-layout .card-header.gradient-header .card-title {
    color: var(--white);
}
.admin-layout .card-header.gradient-header .btn {
    color: var(--white) !important;
}

/* (ข้อ 5) Footer */
.public-footer {
    background-color: var(--gunmetal-2);
    color: var(--antiflash-white-2);
    padding: 2rem 0;
    margin-top: 3rem;
}

.footer-logo {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    margin-right: 10px;
}