/*
 * Tệp CSS tùy chỉnh cho dự án Sweet Spa
 * Version: 1.3 (Thêm style cho Gallery Filter, Overlay, Lightbox)
 */

/* --- 1. BIẾN MÀU VÀ FONT CHỮ --- */
:root {
    --primary-color: #b0d8e8; /* Màu xanh nhạt sang trọng, chủ đạo */
    --primary-hover: #ffffff; /* Màu trắng khi hover primary */
    --dark-bg: #1a1a1a;       /* Nền tối sâu hơn, sang trọng hơn */
    --secondary-bg: #252525; /* Nền phụ cho card, section */
    --text-color: #e9e9e9;    /* Màu chữ chính, hơi xám nhẹ */
    --text-muted: #a9a9a9;    /* Màu chữ phụ, mờ hơn */
    --border-color: #3a3a3a; /* Màu đường viền tinh tế hơn */

    --font-heading: 'Cormorant Garamond', serif; /* Font cho các tiêu đề */
    --font-body: 'Work Sans', sans-serif;       /* Font cho văn bản thường */
}

/* --- 2. THIẾT LẬP CƠ BẢN & HELPERS --- */
body {
    background-color: var(--dark-bg);
    color: var(--text-color);
    font-family: var(--font-body);
    scroll-behavior: smooth;
    line-height: 1.7;
}

h1, h2, h3, h4, h5, h6, .display-3, .display-5, .display-6 {
    font-family: var(--font-heading);
    font-weight: 600;
    color: var(--primary-color);
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--primary-hover);
}

/* --- 3. TÙY CHỈNH CÁC THÀNH PHẦN BOOTSTRAP --- */
.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: #000;
    padding: 12px 30px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all 0.3s ease;
    border-radius: 5px;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
    color: #000;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(255, 255, 255, 0.1);
}

.btn-outline-light {
    padding: 10px 25px;
    font-weight: 500;
    transition: all 0.3s ease;
    border-radius: 5px;
    border-color: #fff;
    color: #fff;
}
.btn-outline-light:hover {
    background-color: #fff;
    color: #000;
}

.bg-dark {
    background-color: var(--dark-bg) !important;
}

.bg-secondary {
    background-color: var(--secondary-bg) !important;
}

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

/* --- 4. HEADER & NAVIGATION --- */
#main-header {
    background-color: rgba(26, 26, 26, 0.8);
    backdrop-filter: blur(10px);
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
    border-bottom: 1px solid var(--border-color);
}

#main-header.scrolled {
    background-color: var(--dark-bg);
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

#main-header .logo-link {
    font-family: var(--font-heading);
    transition: transform 0.3s ease;
}
#main-header .logo-link:hover {
    transform: scale(1.05);
}

.main-nav .nav-link {
    font-weight: 400;
    color: var(--text-color);
    padding: 8px 16px;
    position: relative;
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 1px;
}

.main-nav .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

.main-nav .nav-link:hover::after,
.main-nav .nav-link.active::after {
    width: 60%;
}

.main-nav .nav-link.active {
    color: #ffffff;
    font-weight: 500;
}

.nav-link-mobile {
    color: var(--text-color);
    text-decoration: none;
    padding: 12px 15px;
    margin: 5px 0;
    font-size: 1.2rem;
    border-radius: 5px;
    transition: background-color 0.3s ease, color 0.3s ease;
}
.nav-link-mobile:hover {
    background-color: var(--secondary-bg);
    color: var(--primary-hover);
}
.nav-link-mobile.active {
    background-color: var(--primary-color);
    color: #000;
    font-weight: bold;
}

/* --- 5. HERO SECTION --- */
.hero-section {
    position: relative;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 85vh;
}
.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to top, rgba(0,0,0,0.8), rgba(0,0,0,0.3));
    z-index: 1;
}
.hero-section .container {
    position: relative;
    z-index: 2;
}

/* --- 6. CÁC SECTION CHUNG --- */
section {
    padding-top: 4rem;
    padding-bottom: 4rem;
    scroll-margin-top: 90px;
}

section.is-visible {
    opacity: 1;
    transform: translateY(0);
}
section {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

/* --- 7. CARD (DỊCH VỤ, BLOG) --- */
.card {
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
    border-color: var(--primary-color);
}

/* --- 8. GALLERY PAGE STYLES (NEW) --- */
/* Filter Buttons */
.filter-buttons .btn {
    margin: 0 5px 10px;
    border-radius: 20px; /* Nút bo tròn */
    padding: 8px 20px;
    font-weight: 500;
}
.filter-buttons .btn.active {
    background-color: var(--primary-color);
    color: #000;
    border-color: var(--primary-color);
}

/* Gallery Item & Overlay */
.gallery-card {
    position: relative;
    overflow: hidden;
    border: none;
}
.gallery-card .gallery-item-link {
    display: block;
    position: relative;
}
.gallery-card .gallery-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.6);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: opacity 0.4s ease;
}
.gallery-card:hover .gallery-overlay {
    opacity: 1;
}
.gallery-card .gallery-overlay i {
    transform: scale(0.8);
    transition: transform 0.4s ease;
}
.gallery-card:hover .gallery-overlay i {
    transform: scale(1);
}

/* Lightbox2 Overrides */
.lightboxOverlay {
    background-color: rgba(10, 10, 10, 0.9) !important; /* Nền tối hơn */
}
.lb-data .lb-caption {
    color: var(--text-muted) !important;
    font-size: 1rem !important;
}
.lb-data .lb-number {
    color: var(--text-muted) !important;
}

/* --- 9. FOOTER --- */
footer {
    background-color: #000 !important;
    border-top: 1px solid var(--border-color);
}
footer .logo-link {
    font-family: var(--font-heading);
}
footer .social-links a {
    font-size: 1.5rem;
    margin: 0 0.75rem;
    transition: color 0.3s ease, transform 0.3s ease;
}
footer .social-links a:hover {
    color: var(--primary-color);
    transform: translateY(-3px);
}

/* --- 10. RESPONSIVE DESIGN --- */
@media (max-width: 991.98px) {
    .hero-section { min-height: 70vh; }
    h1.display-3 { font-size: 3.5rem; }
    h2.display-5 { font-size: 2.8rem; }
}

@media (max-width: 767.98px) {
    .hero-section { min-height: 60vh; }
    h1.display-3 { font-size: 2.8rem; }
    h2.display-5 { font-size: 2.2rem; }
    section { padding-top: 3rem; padding-bottom: 3rem; scroll-margin-top: 70px; }
}