/* ============================================
   ARSAN SINAİ & TIBBİ GAZLAR - ANA STIL
   Modern 2026 Tasarım
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700;800&family=Playfair+Display:wght@700&display=swap');

:root {
    --primary: #1a3a5c;
    --primary-dark: #0d2137;
    --secondary: #2196F3;
    --accent: #00bcd4;
    --light-blue: #4fc3f7;
    --silver: #b0bec5;
    --dark: #0a1628;
    --light: #f5f7fa;
    --white: #ffffff;
    --text: #333333;
    --text-light: #6c757d;
    --gradient-primary: linear-gradient(135deg, #1a3a5c 0%, #2196F3 100%);
    --gradient-accent: linear-gradient(135deg, #00bcd4 0%, #2196F3 100%);
    --gradient-dark: linear-gradient(135deg, #0d2137 0%, #1a3a5c 100%);
    --shadow: 0 10px 40px rgba(26, 58, 92, 0.15);
    --shadow-lg: 0 20px 60px rgba(26, 58, 92, 0.2);
    --radius: 16px;
    --radius-sm: 10px;
    --transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
}

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

body {
    font-family: 'Poppins', sans-serif;
    color: var(--text);
    background: var(--light);
    overflow-x: hidden;
    line-height: 1.7;
}

a { text-decoration: none; color: var(--secondary); transition: var(--transition); }
a:hover { color: var(--accent); }

img { max-width: 100%; height: auto; }

/* Scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--light); }
::-webkit-scrollbar-thumb { background: var(--secondary); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--primary); }

/* ============ BUBBLE ANIMATION ============ */
.bubbles-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.bubble {
    position: absolute;
    bottom: -100px;
    border-radius: 50%;
    opacity: 0.06;
    animation: bubbleRise linear infinite;
}

.bubble:nth-child(1) { left: 5%; width: 40px; height: 40px; animation-duration: 15s; background: var(--secondary); animation-delay: 0s; }
.bubble:nth-child(2) { left: 15%; width: 20px; height: 20px; animation-duration: 12s; background: var(--accent); animation-delay: 2s; }
.bubble:nth-child(3) { left: 30%; width: 60px; height: 60px; animation-duration: 18s; background: var(--secondary); animation-delay: 4s; }
.bubble:nth-child(4) { left: 45%; width: 30px; height: 30px; animation-duration: 14s; background: var(--light-blue); animation-delay: 1s; }
.bubble:nth-child(5) { left: 60%; width: 50px; height: 50px; animation-duration: 16s; background: var(--accent); animation-delay: 3s; }
.bubble:nth-child(6) { left: 75%; width: 25px; height: 25px; animation-duration: 13s; background: var(--secondary); animation-delay: 5s; }
.bubble:nth-child(7) { left: 85%; width: 45px; height: 45px; animation-duration: 17s; background: var(--light-blue); animation-delay: 2s; }
.bubble:nth-child(8) { left: 92%; width: 35px; height: 35px; animation-duration: 15s; background: var(--accent); animation-delay: 6s; }

@keyframes bubbleRise {
    0% { transform: translateY(0) scale(0.5); opacity: 0; }
    10% { opacity: 0.06; }
    90% { opacity: 0.06; }
    100% { transform: translateY(-110vh) scale(1.2); opacity: 0; }
}

/* ============ PRELOADER ============ */
.preloader {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: var(--primary-dark);
    z-index: 99999;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.5s, visibility 0.5s;
}
.preloader.loaded { opacity: 0; visibility: hidden; }
.preloader-spinner {
    width: 60px; height: 60px;
    border: 3px solid rgba(255,255,255,0.1);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ============ TOPBAR ============ */
.topbar {
    background: var(--primary-dark);
    padding: 8px 0;
    font-size: 0.82rem;
    color: rgba(255,255,255,0.75);
    border-bottom: 1px solid rgba(255,255,255,0.06);
    position: relative;
    z-index: 1001;
}

.topbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: 20px;
}

.topbar-left span { display: inline-flex; align-items: center; gap: 6px; }
.topbar-left i { color: var(--accent); font-size: 0.78rem; }
.topbar-left a { color: rgba(255,255,255,0.75); }
.topbar-left a:hover { color: var(--accent); }

.topbar-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.topbar-social a {
    color: rgba(255,255,255,0.5);
    font-size: 0.85rem;
    transition: var(--transition);
}
.topbar-social a:hover { color: var(--accent); }

/* ============ HEADER ============ */
.main-header {
    position: sticky;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: var(--white);
    transition: var(--transition);
    padding: 0;
    box-shadow: 0 2px 20px rgba(0,0,0,0.06);
}

.main-header.scrolled {
    box-shadow: 0 4px 30px rgba(0,0,0,0.1);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 0;
}

.site-logo img {
    height: 50px;
    transition: var(--transition);
}
.main-header.scrolled .site-logo img { height: 42px; }

.main-nav ul {
    list-style: none;
    display: flex;
    gap: 3px;
    margin: 0;
    padding: 0;
}

.main-nav a {
    color: var(--primary);
    font-weight: 500;
    font-size: 0.93rem;
    padding: 8px 16px;
    border-radius: 8px;
    transition: var(--transition);
    position: relative;
}

.main-nav a:hover {
    color: var(--secondary);
    background: rgba(33,150,243,0.06);
}

.main-nav a.active {
    color: var(--secondary);
    background: rgba(33,150,243,0.08);
    font-weight: 600;
}

.main-nav a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 3px;
    background: var(--gradient-accent);
    border-radius: 2px;
}

.header-cta .btn {
    background: var(--gradient-accent);
    border: none;
    color: var(--white);
    padding: 10px 24px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition);
}
.header-cta .btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0,188,212,0.4);
    color: var(--white);
}

/* ============ DROPDOWN MENU ============ */
.main-nav ul { position: relative; }
.main-nav li { position: relative; }

.main-nav li.has-dropdown > a {
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.dropdown-arrow {
    font-size: 0.6rem;
    transition: var(--transition);
    opacity: 0.5;
}

.main-nav li.has-dropdown:hover .dropdown-arrow {
    transform: rotate(180deg);
    opacity: 1;
}

.dropdown-menu-custom {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 220px;
    background: var(--white);
    border-radius: 12px;
    box-shadow: 0 15px 50px rgba(0,0,0,0.12);
    padding: 10px;
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
    z-index: 100;
    border: 1px solid rgba(0,0,0,0.04);
}

.main-nav li.has-dropdown:hover .dropdown-menu-custom {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu-custom li a {
    display: flex;
    align-items: center;
    padding: 10px 16px !important;
    border-radius: 8px;
    font-size: 0.88rem !important;
    color: var(--text) !important;
    font-weight: 400 !important;
    white-space: nowrap;
}

.dropdown-menu-custom li a:hover {
    background: rgba(33,150,243,0.06) !important;
    color: var(--secondary) !important;
}

.dropdown-menu-custom li a i {
    width: 20px;
    color: var(--accent);
    font-size: 0.8rem;
}

/* Mobile Menu */
.mobile-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}
.mobile-toggle span {
    display: block;
    width: 28px;
    height: 2px;
    background: var(--primary);
    margin: 6px 0;
    transition: var(--transition);
    border-radius: 2px;
}
.mobile-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 6px); }
.mobile-toggle.active span:nth-child(2) { opacity: 0; }
.mobile-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(6px, -7px); }

/* ============ MOBILE BOTTOM BAR ============ */
.mobile-bottom-bar {
    display: none;
    position: fixed;
    bottom: 0; left: 0;
    width: 100%;
    background: var(--white);
    box-shadow: 0 -4px 20px rgba(0,0,0,0.1);
    z-index: 999;
    padding: 8px 0;
    padding-bottom: calc(8px + env(safe-area-inset-bottom));
}

.mobile-bottom-bar .bar-inner {
    display: flex;
    justify-content: space-around;
    align-items: center;
}

.mobile-bottom-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3px;
    text-decoration: none;
    font-size: 0.7rem;
    font-weight: 600;
    padding: 6px 12px;
    border-radius: 10px;
    transition: var(--transition);
    color: var(--text);
}

.mobile-bottom-btn i {
    font-size: 1.2rem;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
}

.mobile-bottom-btn span { font-size: 0.68rem; }

/* ============ HERO / SLIDER ============ */
.hero-section {
    position: relative;
    min-height: auto;
    overflow: hidden;
}

.hero-slide {
    position: relative;
    min-height: 520px;
    display: flex;
    align-items: center;
    background-size: cover;
    background-position: center;
    padding: 60px 0;
}

.hero-overlay {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: linear-gradient(135deg, rgba(13,33,55,0.92) 0%, rgba(26,58,92,0.85) 50%, rgba(33,150,243,0.4) 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 600px;
}

.hero-content .hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(10px);
    padding: 8px 20px;
    border-radius: 50px;
    color: var(--accent);
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 20px;
    border: 1px solid rgba(0,188,212,0.3);
}

.hero-content h1 {
    font-family: 'Poppins', sans-serif;
    font-size: 3.2rem;
    font-weight: 800;
    color: var(--white);
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero-content h1 span {
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-content p {
    color: rgba(255,255,255,0.8);
    font-size: 1.1rem;
    margin-bottom: 30px;
    line-height: 1.8;
}

.hero-buttons { display: flex; gap: 15px; flex-wrap: wrap; }

.btn-hero-primary {
    background: var(--gradient-accent);
    color: var(--white) !important;
    padding: 14px 32px;
    border-radius: 50px;
    font-weight: 600;
    border: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
    font-size: 1rem;
}
.btn-hero-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(0,188,212,0.4);
    color: var(--white) !important;
}

.btn-hero-secondary {
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(10px);
    color: var(--white) !important;
    padding: 14px 32px;
    border-radius: 50px;
    font-weight: 600;
    border: 1px solid rgba(255,255,255,0.2);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
    font-size: 1rem;
}
.btn-hero-secondary:hover {
    background: rgba(255,255,255,0.2);
    transform: translateY(-3px);
    color: var(--white) !important;
}

.hero-image-wrapper {
    position: relative;
    z-index: 2;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-image-wrapper img {
    max-height: 500px;
    filter: drop-shadow(0 20px 60px rgba(0,0,0,0.3));
    animation: floatImage 6s ease-in-out infinite;
}

@keyframes floatImage {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

/* Swiper custom */
.hero-section .swiper-pagination-bullet {
    width: 12px; height: 12px;
    background: rgba(255,255,255,0.4);
    opacity: 1;
    transition: var(--transition);
}
.hero-section .swiper-pagination-bullet-active {
    background: var(--accent);
    width: 36px;
    border-radius: 6px;
}

/* ============ SECTION STYLES ============ */
.section {
    padding: 100px 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(33,150,243,0.08);
    padding: 8px 20px;
    border-radius: 50px;
    color: var(--secondary);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 15px;
    border: 1px solid rgba(33,150,243,0.15);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 15px;
    line-height: 1.3;
}

.section-title span {
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-desc {
    color: var(--text-light);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* ============ ABOUT SECTION ============ */
.about-section {
    background: var(--white);
}

.about-image-wrapper {
    position: relative;
}

.about-image-wrapper .main-image {
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    width: 100%;
    height: 450px;
    object-fit: cover;
}

.about-image-wrapper .experience-badge {
    position: absolute;
    bottom: -20px;
    right: -20px;
    background: var(--gradient-accent);
    color: var(--white);
    padding: 25px;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: 0 10px 30px rgba(0,188,212,0.4);
}

.experience-badge .number {
    font-size: 2.5rem;
    font-weight: 800;
    display: block;
    line-height: 1;
}

.experience-badge .text {
    font-size: 0.85rem;
    font-weight: 500;
}

.about-content h2 {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 20px;
}

.about-content h2 span {
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.about-content p {
    color: var(--text-light);
    margin-bottom: 15px;
    line-height: 1.8;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin: 25px 0;
}

.about-feature-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--light);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}
.about-feature-item:hover {
    background: rgba(33,150,243,0.08);
    transform: translateX(5px);
}

.about-feature-item i {
    color: var(--accent);
    font-size: 1.2rem;
    width: 20px;
    text-align: center;
}

.about-feature-item span {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--primary);
}

.about-buttons { display: flex; gap: 15px; flex-wrap: wrap; }

.btn-primary-custom {
    background: var(--gradient-primary);
    color: var(--white) !important;
    padding: 14px 32px;
    border-radius: 50px;
    font-weight: 600;
    border: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}
.btn-primary-custom:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(26,58,92,0.3);
    color: var(--white) !important;
}

.btn-outline-custom {
    color: var(--primary) !important;
    padding: 14px 32px;
    border-radius: 50px;
    font-weight: 600;
    border: 2px solid var(--primary);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
    background: transparent;
}
.btn-outline-custom:hover {
    background: var(--primary);
    color: var(--white) !important;
    transform: translateY(-3px);
}

/* ============ SERVICES ============ */
.services-section {
    background: var(--light);
}

.service-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 40px 30px;
    text-align: center;
    transition: var(--transition);
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
    height: 100%;
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 4px;
    background: var(--gradient-accent);
    transform: scaleX(0);
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}
.service-card:hover::before { transform: scaleX(1); }

.service-icon {
    width: 80px;
    height: 80px;
    border-radius: 20px;
    background: rgba(33,150,243,0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    transition: var(--transition);
}

.service-card:hover .service-icon {
    background: var(--gradient-accent);
    transform: rotateY(180deg);
}

.service-icon i {
    font-size: 2rem;
    color: var(--secondary);
    transition: var(--transition);
}
.service-card:hover .service-icon i { color: var(--white); }

.service-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 12px;
}

.service-card p {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ============ PRODUCTS ============ */
.products-section {
    background: var(--white);
}

.product-card {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
    box-shadow: 0 5px 20px rgba(0,0,0,0.06);
    height: 100%;
    border: 1px solid rgba(0,0,0,0.05);
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.product-image {
    height: 220px;
    background: linear-gradient(135deg, #e3f2fd 0%, #f5f5f5 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.product-image img {
    max-height: 180px;
    object-fit: contain;
    transition: var(--transition);
}
.product-card:hover .product-image img { transform: scale(1.05); }

.product-image .gas-emoji {
    position: absolute;
    top: 15px;
    right: 15px;
    font-size: 2rem;
    animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2); }
}

.product-image .product-placeholder {
    font-size: 4rem;
    opacity: 0.5;
}

.product-body {
    padding: 25px;
}

.product-body h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 10px;
}

.product-body p {
    color: var(--text-light);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 15px;
}

.product-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--secondary);
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition);
}
.product-link:hover { color: var(--accent); gap: 10px; }

/* ============ GALLERY CAROUSEL ============ */
.gallery-section {
    background: var(--primary-dark);
    position: relative;
    overflow: hidden;
}

.gallery-section .section-title { color: var(--white); }
.gallery-section .section-desc { color: rgba(255,255,255,0.7); }
.gallery-section .section-badge {
    background: rgba(0,188,212,0.15);
    color: var(--accent);
    border-color: rgba(0,188,212,0.3);
}

.gallery-item {
    border-radius: var(--radius);
    overflow: hidden;
    position: relative;
    cursor: pointer;
    height: 280px;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}
.gallery-item:hover img { transform: scale(1.1); }

.gallery-item .gallery-overlay {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: linear-gradient(180deg, transparent 50%, rgba(13,33,55,0.85) 100%);
    display: flex;
    align-items: flex-end;
    padding: 20px;
    opacity: 0;
    transition: var(--transition);
}
.gallery-item:hover .gallery-overlay { opacity: 1; }

.gallery-overlay h4 {
    color: var(--white);
    font-size: 1rem;
    font-weight: 600;
}

.gallery-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(33,150,243,0.2), rgba(0,188,212,0.2));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: rgba(255,255,255,0.3);
}

/* ============ STATS ============ */
.stats-section {
    background: var(--gradient-primary);
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

.stats-section::before {
    content: '';
    position: absolute;
    top: -50%; right: -20%;
    width: 600px; height: 600px;
    background: radial-gradient(circle, rgba(0,188,212,0.15) 0%, transparent 70%);
    border-radius: 50%;
}

.stat-item {
    text-align: center;
    position: relative;
    z-index: 2;
}

.stat-number {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--white);
    line-height: 1;
    margin-bottom: 10px;
}

.stat-number span {
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    color: rgba(255,255,255,0.7);
    font-size: 1rem;
    font-weight: 500;
}

/* ============ BLOG ============ */
.blog-section {
    background: var(--light);
}

.blog-card {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
    height: 100%;
}
.blog-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.blog-card-image {
    height: 220px;
    overflow: hidden;
    position: relative;
}

.blog-card-image img {
    width: 100%; height: 100%;
    object-fit: cover;
    transition: var(--transition);
}
.blog-card:hover .blog-card-image img { transform: scale(1.05); }

.blog-card-image .blog-category {
    position: absolute;
    top: 15px; left: 15px;
    background: var(--gradient-accent);
    color: var(--white);
    padding: 5px 14px;
    border-radius: 50px;
    font-size: 0.78rem;
    font-weight: 600;
}

.blog-card-body {
    padding: 25px;
}

.blog-card-meta {
    display: flex;
    gap: 15px;
    margin-bottom: 12px;
    font-size: 0.82rem;
    color: var(--text-light);
}

.blog-card-meta i { color: var(--accent); }

.blog-card-body h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 10px;
    line-height: 1.5;
}

.blog-card-body h3 a { color: var(--primary); }
.blog-card-body h3 a:hover { color: var(--secondary); }

.blog-card-body p {
    color: var(--text-light);
    font-size: 0.9rem;
    line-height: 1.7;
}

.blog-placeholder {
    width: 100%; height: 100%;
    background: linear-gradient(135deg, #e3f2fd, #f5f5f5);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: rgba(0,0,0,0.1);
}

/* ============ CTA SECTION ============ */
.cta-section {
    background: var(--gradient-primary);
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    bottom: -30%; left: -10%;
    width: 500px; height: 500px;
    background: radial-gradient(circle, rgba(0,188,212,0.2) 0%, transparent 70%);
    border-radius: 50%;
}

.cta-content {
    text-align: center;
    position: relative;
    z-index: 2;
}

.cta-content h2 {
    color: var(--white);
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 15px;
}

.cta-content p {
    color: rgba(255,255,255,0.8);
    font-size: 1.1rem;
    margin-bottom: 30px;
}

/* ============ FOOTER ============ */
.main-footer {
    background: var(--dark);
    position: relative;
    overflow: hidden;
}

.footer-top {
    padding: 80px 0 50px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-logo img {
    height: 50px;
    margin-bottom: 20px;
}

.footer-desc {
    color: rgba(255,255,255,0.6);
    font-size: 0.95rem;
    line-height: 1.8;
    margin-bottom: 20px;
}

.footer-social {
    display: flex;
    gap: 10px;
}

.footer-social a {
    width: 42px; height: 42px;
    border-radius: 12px;
    background: rgba(255,255,255,0.06);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.6);
    transition: var(--transition);
    font-size: 1rem;
}
.footer-social a:hover {
    background: var(--gradient-accent);
    color: var(--white);
    transform: translateY(-3px);
}

.footer-title {
    color: var(--white);
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 25px;
    position: relative;
    padding-bottom: 12px;
}

.footer-title::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0;
    width: 40px; height: 3px;
    background: var(--gradient-accent);
    border-radius: 2px;
}

.footer-links {
    list-style: none;
    padding: 0; margin: 0;
}

.footer-links li { margin-bottom: 10px; }

.footer-links a {
    color: rgba(255,255,255,0.6);
    font-size: 0.95rem;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}
.footer-links a:hover { color: var(--accent); padding-left: 5px; }
.footer-links a i { font-size: 0.7rem; color: var(--accent); }

.footer-contact-item {
    display: flex;
    gap: 12px;
    margin-bottom: 18px;
}

.footer-contact-item i {
    color: var(--accent);
    font-size: 1rem;
    margin-top: 4px;
    width: 20px;
    text-align: center;
}

.footer-contact-item span {
    color: rgba(255,255,255,0.6);
    font-size: 0.95rem;
    line-height: 1.6;
}

.footer-bottom {
    padding: 25px 0;
    text-align: center;
}

.footer-bottom p {
    color: rgba(255,255,255,0.4);
    font-size: 0.88rem;
    margin: 0;
}

/* ============ PAGE HEADER (BANNER) ============ */
.page-header {
    background: var(--gradient-dark);
    padding: 60px 0;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: -50%; right: -20%;
    width: 800px; height: 800px;
    background: radial-gradient(circle, rgba(0,188,212,0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.page-header h1 {
    color: var(--white);
    font-size: 2.8rem;
    font-weight: 800;
    margin-bottom: 15px;
    position: relative;
}

.page-breadcrumb {
    display: flex;
    gap: 10px;
    align-items: center;
    position: relative;
}

.page-breadcrumb a { color: rgba(255,255,255,0.6); font-size: 0.95rem; }
.page-breadcrumb a:hover { color: var(--accent); }
.page-breadcrumb span { color: rgba(255,255,255,0.3); }
.page-breadcrumb .current { color: var(--accent); font-size: 0.95rem; }

/* ============ CONTACT PAGE ============ */
.contact-info-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 30px;
    display: flex;
    align-items: flex-start;
    gap: 20px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
    transition: var(--transition);
    height: 100%;
}
.contact-info-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.contact-info-card .icon {
    width: 60px; height: 60px;
    border-radius: 16px;
    background: rgba(33,150,243,0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.contact-info-card .icon i {
    font-size: 1.5rem;
    color: var(--secondary);
}

.contact-info-card h4 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 5px;
}

.contact-info-card p {
    color: var(--text-light);
    font-size: 0.95rem;
    margin: 0;
    line-height: 1.6;
}

.contact-form {
    background: var(--white);
    border-radius: var(--radius);
    padding: 40px;
    box-shadow: var(--shadow);
}

.form-control, .form-select {
    border: 2px solid #eee;
    border-radius: var(--radius-sm);
    padding: 14px 18px;
    font-size: 0.95rem;
    transition: var(--transition);
}
.form-control:focus, .form-select:focus {
    border-color: var(--secondary);
    box-shadow: 0 0 0 4px rgba(33,150,243,0.1);
}

/* ============ WHATSAPP FLOAT ============ */
.whatsapp-float {
    position: fixed;
    bottom: 30px; right: 30px;
    width: 60px; height: 60px;
    background: #25D366;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.8rem;
    z-index: 999;
    box-shadow: 0 5px 25px rgba(37,211,102,0.4);
    transition: var(--transition);
    animation: whatsappPulse 2s infinite;
}
.whatsapp-float:hover {
    transform: scale(1.1);
    color: var(--white);
}
@keyframes whatsappPulse {
    0% { box-shadow: 0 0 0 0 rgba(37,211,102,0.4); }
    70% { box-shadow: 0 0 0 15px rgba(37,211,102,0); }
    100% { box-shadow: 0 0 0 0 rgba(37,211,102,0); }
}

/* ============ BACK TO TOP ============ */
.back-to-top {
    position: fixed;
    bottom: 100px; right: 32px;
    width: 45px; height: 45px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.1rem;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { transform: translateY(-3px); }

/* ============ GAS MOLECULES ANIMATION ============ */
.gas-molecule {
    display: inline-block;
    animation: gasBounce 3s ease-in-out infinite;
}
.gas-molecule:nth-child(2) { animation-delay: 0.3s; }
.gas-molecule:nth-child(3) { animation-delay: 0.6s; }
@keyframes gasBounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

/* ============ MAINTENANCE ADMIN BAR ============ */
.maintenance-admin-bar {
    background: linear-gradient(135deg, #ff6b35, #e53935);
    color: #fff;
    padding: 10px 0;
    font-size: 0.85rem;
    position: relative;
    z-index: 9999;
    box-shadow: 0 2px 15px rgba(229,57,53,0.3);
}
.maintenance-admin-bar a { text-decoration: none; }

/* ============ FLOATING GAS ICONS ============ */
.floating-icons-container {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    pointer-events: none;
    overflow: hidden;
    z-index: 0;
}

.floating-icon {
    position: absolute;
    opacity: 0.18;
    animation: floatIcon ease-in-out infinite;
    filter: grayscale(10%);
}

/* Row 1 - top region */
.floating-icon:nth-child(1)  { left: 2%;  top: 5%;  font-size: 2.2rem; animation-duration: 11s; }
.floating-icon:nth-child(2)  { left: 12%; top: 8%;  font-size: 1.6rem; opacity: 0.14; animation-duration: 9s;  animation-delay: 0.8s; }
.floating-icon:nth-child(3)  { left: 24%; top: 3%;  font-size: 2.8rem; opacity: 0.22; animation-duration: 13s; animation-delay: 2s; }
.floating-icon:nth-child(4)  { left: 38%; top: 10%; font-size: 1.4rem; animation-duration: 10s; animation-delay: 1.2s; }
.floating-icon:nth-child(5)  { left: 52%; top: 6%;  font-size: 2.5rem; opacity: 0.20; animation-duration: 12s; animation-delay: 3s; }
.floating-icon:nth-child(6)  { left: 66%; top: 4%;  font-size: 1.8rem; animation-duration: 8s;  animation-delay: 0.4s; }
.floating-icon:nth-child(7)  { left: 78%; top: 9%;  font-size: 2.0rem; opacity: 0.16; animation-duration: 14s; animation-delay: 4s; }
.floating-icon:nth-child(8)  { left: 92%; top: 7%;  font-size: 1.5rem; animation-duration: 10s; animation-delay: 1.8s; }

/* Row 2 - upper-mid */
.floating-icon:nth-child(9)  { left: 6%;  top: 28%; font-size: 3.0rem; opacity: 0.20; animation-duration: 15s; animation-delay: 2.5s; }
.floating-icon:nth-child(10) { left: 18%; top: 32%; font-size: 1.3rem; animation-duration: 9s;  animation-delay: 0.6s; }
.floating-icon:nth-child(11) { left: 32%; top: 26%; font-size: 2.4rem; opacity: 0.16; animation-duration: 11s; animation-delay: 3.5s; }
.floating-icon:nth-child(12) { left: 46%; top: 30%; font-size: 1.7rem; animation-duration: 10s; animation-delay: 1.4s; }
.floating-icon:nth-child(13) { left: 60%; top: 24%; font-size: 2.6rem; opacity: 0.22; animation-duration: 13s; animation-delay: 4.5s; }
.floating-icon:nth-child(14) { left: 74%; top: 34%; font-size: 1.5rem; animation-duration: 8s;  animation-delay: 0.2s; }
.floating-icon:nth-child(15) { left: 88%; top: 28%; font-size: 2.0rem; opacity: 0.15; animation-duration: 12s; animation-delay: 2.8s; }

/* Row 3 - mid */
.floating-icon:nth-child(16) { left: 3%;  top: 50%; font-size: 1.9rem; animation-duration: 10s; animation-delay: 1s; }
.floating-icon:nth-child(17) { left: 16%; top: 55%; font-size: 2.8rem; opacity: 0.24; animation-duration: 14s; animation-delay: 3.2s; }
.floating-icon:nth-child(18) { left: 30%; top: 48%; font-size: 1.4rem; animation-duration: 9s;  animation-delay: 0.5s; }
.floating-icon:nth-child(19) { left: 44%; top: 52%; font-size: 2.2rem; opacity: 0.18; animation-duration: 11s; animation-delay: 2.2s; }
.floating-icon:nth-child(20) { left: 58%; top: 46%; font-size: 1.6rem; animation-duration: 8s;  animation-delay: 4.2s; }
.floating-icon:nth-child(21) { left: 70%; top: 54%; font-size: 3.2rem; opacity: 0.20; animation-duration: 16s; animation-delay: 1.6s; }
.floating-icon:nth-child(22) { left: 84%; top: 50%; font-size: 1.3rem; animation-duration: 10s; animation-delay: 3.8s; }

/* Row 4 - lower-mid */
.floating-icon:nth-child(23) { left: 8%;  top: 72%; font-size: 2.5rem; opacity: 0.22; animation-duration: 12s; animation-delay: 2s; }
.floating-icon:nth-child(24) { left: 22%; top: 68%; font-size: 1.5rem; animation-duration: 9s;  animation-delay: 0.9s; }
.floating-icon:nth-child(25) { left: 36%; top: 74%; font-size: 2.0rem; opacity: 0.16; animation-duration: 11s; animation-delay: 3.6s; }
.floating-icon:nth-child(26) { left: 50%; top: 70%; font-size: 1.8rem; animation-duration: 10s; animation-delay: 1.3s; }
.floating-icon:nth-child(27) { left: 64%; top: 76%; font-size: 2.6rem; opacity: 0.20; animation-duration: 13s; animation-delay: 4.8s; }
.floating-icon:nth-child(28) { left: 82%; top: 72%; font-size: 1.4rem; animation-duration: 8s;  animation-delay: 0.7s; }

/* Row 5 - bottom */
.floating-icon:nth-child(29) { left: 10%; top: 88%; font-size: 2.0rem; opacity: 0.14; animation-duration: 14s; animation-delay: 2.4s; }
.floating-icon:nth-child(30) { left: 40%; top: 90%; font-size: 1.6rem; animation-duration: 9s;  animation-delay: 1.7s; }
.floating-icon:nth-child(31) { left: 56%; top: 86%; font-size: 2.3rem; opacity: 0.18; animation-duration: 11s; animation-delay: 3.4s; }
.floating-icon:nth-child(32) { left: 76%; top: 92%; font-size: 1.5rem; animation-duration: 10s; animation-delay: 0.3s; }
.floating-icon:nth-child(33) { left: 94%; top: 44%; font-size: 1.8rem; opacity: 0.15; animation-duration: 12s; animation-delay: 5s; }
.floating-icon:nth-child(34) { left: 48%; top: 16%; font-size: 1.3rem; animation-duration: 8s;  animation-delay: 2.6s; }
.floating-icon:nth-child(35) { left: 86%; top: 62%; font-size: 2.4rem; opacity: 0.20; animation-duration: 15s; animation-delay: 1.1s; }

@keyframes floatIcon {
    0% { transform: translateY(0) rotate(0deg) scale(1); }
    25% { transform: translateY(-25px) rotate(4deg) scale(1.04); }
    50% { transform: translateY(-12px) rotate(-3deg) scale(0.96); }
    75% { transform: translateY(-40px) rotate(4deg) scale(1.1); }
    100% { transform: translateY(0) rotate(0deg) scale(1); }
}

/* ============ MAINTENANCE MODE ============ */
.maintenance-page {
    min-height: 100vh;
    background: var(--gradient-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.maintenance-content {
    position: relative;
    z-index: 2;
    max-width: 600px;
    padding: 40px;
}

.maintenance-content img { height: 80px; margin-bottom: 30px; }
.maintenance-content h1 { font-size: 2.5rem; font-weight: 800; margin-bottom: 15px; }
.maintenance-content p { color: rgba(255,255,255,0.7); font-size: 1.1rem; margin-bottom: 30px; line-height: 1.8; }

.maintenance-contact {
    display: flex;
    gap: 25px;
    justify-content: center;
    flex-wrap: wrap;
}

.maintenance-contact a {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--accent);
    font-weight: 500;
    font-size: 0.95rem;
}
.maintenance-contact a:hover { color: var(--white); }

/* ============ COPYRIGHT ============ */
.copyright-link { color: var(--accent); font-weight: 500; }
.copyright-link:hover { color: var(--light-blue); }

/* ============ RESPONSIVE ============ */
@media (max-width: 991px) {
    .topbar { display: none; }
    .main-nav { 
        position: fixed;
        top: 0; right: -300px;
        width: 300px; height: 100vh;
        background: var(--primary-dark);
        padding: 80px 30px 30px;
        transition: var(--transition);
        z-index: 1001;
        overflow-y: auto;
    }
    .main-nav.open { right: 0; }
    .main-nav ul { flex-direction: column; gap: 5px; }
    .main-nav a { display: block; padding: 12px 20px; color: rgba(255,255,255,0.85); }
    .main-nav a:hover, .main-nav a.active { color: var(--white); background: rgba(255,255,255,0.08); }
    
    .dropdown-menu-custom {
        position: static; opacity: 1; visibility: visible;
        transform: none; box-shadow: none; border: none;
        background: rgba(255,255,255,0.04); border-radius: 8px;
        margin: 5px 0 5px 15px; padding: 5px;
    }
    .dropdown-menu-custom li a { color: rgba(255,255,255,0.7) !important; font-size: 0.85rem !important; padding: 8px 14px !important; }
    .dropdown-menu-custom li a:hover { background: rgba(255,255,255,0.06) !important; color: var(--accent) !important; }
    .mobile-toggle { display: block; z-index: 1002; }
    .header-cta { display: none; }
    
    .hero-content h1 { font-size: 2.2rem; }
    .hero-image-wrapper { display: none; }
    .hero-slide { min-height: 400px; }
    
    .section { padding: 60px 0; }
    .section-title { font-size: 2rem; }
    
    .about-features { grid-template-columns: 1fr; }
    .about-image-wrapper { margin-bottom: 40px; }
    
    .page-header { padding: 40px 0; }
    .page-header h1 { font-size: 2rem; }
    
    .mobile-bottom-bar { display: block; }
    body { padding-bottom: 75px; }
    .whatsapp-float { bottom: 90px; }
    .back-to-top { bottom: 150px; }
    .main-footer .footer-bottom { padding-bottom: 80px; }
}

@media (max-width: 576px) {
    .hero-content h1 { font-size: 1.8rem; }
    .hero-buttons { flex-direction: column; }
    .stat-number { font-size: 2.5rem; }
    .footer-top { padding: 50px 0 30px; }
    .cta-content h2 { font-size: 1.8rem; }
    .hero-slide { min-height: 350px; padding: 40px 0; }
}

/* ============ DETAIL PAGE ============ */
.product-detail-image {
    background: linear-gradient(135deg, #e3f2fd, #f5f5f5);
    border-radius: var(--radius);
    padding: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 400px;
}

.product-detail-image img {
    max-height: 350px;
    object-fit: contain;
}

.spec-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    border-radius: var(--radius-sm);
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.spec-table th, .spec-table td {
    padding: 14px 20px;
    text-align: left;
    font-size: 0.95rem;
}

.spec-table th {
    background: var(--primary);
    color: var(--white);
    font-weight: 600;
    width: 40%;
}

.spec-table td { background: var(--white); }
.spec-table tr:nth-child(even) td { background: var(--light); }

/* Blog detail */
.blog-detail-content {
    background: var(--white);
    border-radius: var(--radius);
    padding: 40px;
    box-shadow: var(--shadow);
}

.blog-detail-content img { border-radius: var(--radius-sm); margin: 20px 0; }

.blog-detail-meta {
    display: flex;
    gap: 20px;
    margin-bottom: 25px;
    flex-wrap: wrap;
}

.blog-detail-meta span {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-light);
    font-size: 0.9rem;
}
.blog-detail-meta i { color: var(--accent); }

/* Sidebar */
.sidebar-widget {
    background: var(--white);
    border-radius: var(--radius);
    padding: 25px;
    margin-bottom: 25px;
    box-shadow: 0 3px 15px rgba(0,0,0,0.05);
}

.sidebar-widget h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--light);
}

/* Service Detail */
.service-detail-content {
    background: var(--white);
    border-radius: var(--radius);
    padding: 40px;
    box-shadow: var(--shadow);
}

/* Gallery page grid */
.gallery-grid-item {
    border-radius: var(--radius);
    overflow: hidden;
    position: relative;
    height: 280px;
    cursor: pointer;
    margin-bottom: 25px;
}

.gallery-grid-item img {
    width: 100%; height: 100%;
    object-fit: cover;
    transition: var(--transition);
}
.gallery-grid-item:hover img { transform: scale(1.05); }

/* Mobile nav overlay */
.nav-overlay {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}
.nav-overlay.active { opacity: 1; visibility: visible; }

/* Gas particle decoration */
.gas-particles {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0; left: 0;
    pointer-events: none;
    overflow: hidden;
}

.gas-particle {
    position: absolute;
    width: 6px; height: 6px;
    background: var(--accent);
    border-radius: 50%;
    opacity: 0.3;
    animation: particleFloat 8s linear infinite;
}

@keyframes particleFloat {
    0% { transform: translate(0, 0) scale(0); opacity: 0; }
    20% { opacity: 0.3; }
    80% { opacity: 0.3; }
    100% { transform: translate(var(--tx), var(--ty)) scale(1); opacity: 0; }
}