/* ========================================
   KNC Memorial Theme - Pure Monochrome
   เพื่อแสดงความเสียใจและไว้อาลัย
   ======================================== */

:root {
    /* Pure Monochrome Palette */
    --primary-black: #000000;
    --secondary-black: #1a1a1a;
    --dark-gray: #2d2d2d;
    --medium-gray: #666666;
    --light-gray: #999999;
    --very-light-gray: #cccccc;
    --off-white: #f8f8f8;
    --pure-white: #ffffff;
    
    /* Shadows - Softer for memorial */
    --shadow-light: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-medium: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-heavy: 0 8px 24px rgba(0, 0, 0, 0.16);
}

/* ========================================
   Global & Body Styles
   ======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Sarabun', sans-serif;
    color: var(--primary-black);
    background-color: var(--pure-white);
    line-height: 1.6;
}

/* Force ALL images to grayscale */
img {
    filter: grayscale(100%);
    -webkit-filter: grayscale(100%);
}

/* ========================================
   Memorial Banner
   ======================================== */
.memorial-banner {
    background: var(--primary-black);
    color: var(--pure-white);
    text-align: center;
    padding: 1rem;
    font-size: 1.1rem;
    font-weight: 400;
    letter-spacing: 1px;
    border-bottom: 2px solid var(--dark-gray);
}

.memorial-banner i {
    margin: 0 0.5rem;
    opacity: 0.8;
}

/* ========================================
   Navigation Bar
   ======================================== */
.navbar-custom {
    background-color: var(--primary-black) !important;
    border-bottom: 1px solid var(--dark-gray);
    box-shadow: var(--shadow-medium);
}

.navbar-custom .navbar-brand,
.navbar-custom .nav-link {
    color: var(--pure-white) !important;
    font-weight: 400;
    transition: color 0.3s ease;
}

.navbar-custom .nav-link:hover {
    color: var(--light-gray) !important;
}

.navbar-custom .nav-link.active {
    color: var(--pure-white) !important;
    border-bottom: 2px solid var(--pure-white);
}

/* ========================================
   Carousel
   ======================================== */
.carousel-item img {
    filter: grayscale(100%) brightness(0.6);
    -webkit-filter: grayscale(100%) brightness(0.6);
}

.carousel-caption {
    background-color: rgba(0, 0, 0, 0.7);
    padding: 1.5rem;
    border-radius: 4px;
    border-left: 3px solid var(--pure-white);
}

.carousel-caption h5 {
    color: var(--pure-white);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.carousel-caption p {
    color: var(--very-light-gray);
    margin: 0;
}

.carousel-control-prev-icon,
.carousel-control-next-icon {
    filter: invert(1);
}

.carousel-indicators button {
    background-color: var(--medium-gray);
}

.carousel-indicators button.active {
    background-color: var(--pure-white);
}

/* ========================================
   Sections
   ======================================== */
.page-section {
    padding: 4rem 0;
}

.section-heading {
    color: var(--primary-black);
    font-weight: 700;
    font-size: 2.5rem;
    margin-bottom: 1rem;
    text-transform: uppercase;
}

.section-subheading {
    color: var(--medium-gray);
    font-size: 1.1rem;
    margin-bottom: 3rem;
}

.bg-light-custom {
    background-color: var(--off-white) !important;
}

/* ========================================
   Cards
   ======================================== */
.card {
    border: 1px solid var(--very-light-gray);
    border-radius: 8px;
    transition: all 0.3s ease;
    background-color: var(--pure-white);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
    border-color: var(--primary-black);
}

.card-title {
    color: var(--primary-black);
    font-weight: 600;
}

.card-text,
.text-muted {
    color: var(--medium-gray) !important;
}

.card-img-fixed {
    width: 100%;
    height: 200px;
    object-fit: cover;
    filter: grayscale(100%);
    -webkit-filter: grayscale(100%);
}

/* ========================================
   Icons
   ======================================== */
.fa-shopping-cart,
.fa-truck-fast,
.fa-city,
.fa-check-circle,
.fa-certificate {
    color: var(--primary-black) !important;
}

/* ========================================
   About Section with Background Image
   ======================================== */
.bg-image-about {
    background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), 
                url('https://plus.unsplash.com/premium_photo-1681400279564-729d7fde5f99?q=80&w=1332&auto=format&fit=crop&ixlib=rb-4.1.0&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D') no-repeat center center;
    background-size: cover;
    filter: grayscale(100%);
    -webkit-filter: grayscale(100%);
}

.bg-image-about .section-heading,
.bg-image-about .section-subheading {
    color: var(--pure-white) !important;
}

.bg-image-about .card {
    background-color: rgba(0, 0, 0, 0.5);
    color: var(--pure-white);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.bg-image-about .card p {
    color: var(--very-light-gray) !important;
}

/* ========================================
   Team Section
   ======================================== */
.list-group-item {
    background-color: var(--pure-white);
    border-color: var(--very-light-gray);
    color: var(--primary-black);
    transition: background-color 0.3s ease;
}

.list-group-item:hover {
    background-color: var(--off-white);
}

/* ========================================
   Table (Production Units)
   ======================================== */
.table {
    background-color: var(--pure-white);
}

.table-dark {
    background-color: var(--primary-black) !important;
    color: var(--pure-white) !important;
}

.table-hover tbody tr:hover {
    background-color: var(--off-white);
}

.btn-outline-primary {
    color: var(--primary-black);
    border-color: var(--primary-black);
}

.btn-outline-primary:hover {
    background-color: var(--primary-black);
    color: var(--pure-white);
    border-color: var(--primary-black);
}

/* ========================================
   Footer
   ======================================== */
.footer-custom {
    background-color: var(--primary-black);
    background-image: url('../img/Artboard1footer.jpg');
    background-repeat: no-repeat;
    background-position: center bottom;
    background-size: 100% auto;
    min-height: 389px;
    padding: 50px 20px 20px;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    filter: grayscale(100%);
    -webkit-filter: grayscale(100%);
}

.footer-custom p {
    color: var(--pure-white);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.8);
    font-size: 1rem;
    margin: 0;
}

/* ========================================
   Utilities
   ======================================== */
.shadow-sm {
    box-shadow: var(--shadow-light) !important;
}

.shadow {
    box-shadow: var(--shadow-medium) !important;
}

.text-white {
    color: var(--pure-white) !important;
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 768px) {
    .section-heading {
        font-size: 2rem;
    }
    
    .memorial-banner {
        font-size: 1rem;
        padding: 0.75rem;
    }
    
    .page-section {
        padding: 3rem 0;
    }
    
    .card-img-fixed {
        height: 180px;
    }
}

@media (max-width: 576px) {
    .section-heading {
        font-size: 1.75rem;
    }
    
    .carousel-caption {
        padding: 1rem;
    }
    
    .carousel-caption h5 {
        font-size: 1rem;
    }
    
    .carousel-caption p {
        font-size: 0.875rem;
    }
}

/* ========================================
   Print Styles (Black & White)
   ======================================== */
@media print {
    * {
        background: white !important;
        color: black !important;
        filter: grayscale(100%);
    }
}