:root {
    --primary-color: #000000;
    --secondary-color: #333333;
    --accent-color: #666666;
    --text-dark: #000000;
    --text-light: #666666;
    --text-muted: #999999;
    --bg-white: #ffffff;
    --bg-light: #f8f9fa;
    --bg-dark: #000000;
    --border-color: #e0e0e0;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--bg-white);
}

/* Navbar Styles */
.navbar {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    box-shadow: 0 1px 20px rgba(0, 0, 0, 0.05);
    padding: 0.5rem 0;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(25px);
    box-shadow: 0 2px 30px rgba(0, 0, 0, 0.1);
    padding: 0.25rem 0;
}

/* Navbar Brand */
.navbar-brand {
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--text-dark) !important;
    text-decoration: none;
    transition: all 0.3s ease;
}

.navbar-brand:hover {
    transform: scale(1.05);
}

.navbar-brand img {
    transition: all 0.3s ease;
}

.navbar-brand:hover img {
    transform: rotate(5deg);
}

/* Navbar Links */
.navbar-nav .nav-link {
    color: var(--text-dark) !important;
    font-weight: 500;
    padding: 12px 16px !important;
    border-radius: 8px;
    transition: all 0.3s ease;
    text-decoration: none;
    position: relative;
    margin: 0 4px;
}

.navbar-nav .nav-link:hover {
    background: rgba(0, 0, 0, 0.05);
    color: var(--text-dark) !important;
    transform: translateY(-1px);
}

.navbar-nav .nav-link.active {
    background: var(--primary-color);
    color: white !important;
}

/* Dropdown Menu */
.dropdown-menu {
    background: white;
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    padding: 8px 0;
    margin-top: 8px;
    min-width: 220px;
    animation: dropdownFadeIn 0.3s ease;
}

@keyframes dropdownFadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.dropdown-item {
    color: var(--text-dark);
    padding: 12px 20px;
    transition: all 0.3s ease;
    text-decoration: none;
    display: flex;
    align-items: center;
    border-radius: 8px;
    margin: 0 8px;
}

.dropdown-item:hover {
    background: rgba(0, 0, 0, 0.05);
    color: var(--text-dark);
    transform: translateX(5px);
}

.dropdown-item i {
    color: var(--text-light);
    font-size: 0.9rem;
    width: 20px;
}

/* Contact Button (Special) */
.nav-link.contact-btn {
    background: var(--primary-color) !important;
    color: white !important;
    font-weight: 600;
    border-radius: 25px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    margin-left: 12px !important;
}

.nav-link.contact-btn:hover {
    background: var(--secondary-color) !important;
    color: white !important;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* Mobile Navbar */
.navbar-toggler {
    border: none;
    padding: 8px 12px;
    background: var(--primary-color);
    border-radius: 8px;
    transition: all 0.3s ease;
}

.navbar-toggler:hover {
    background: var(--secondary-color);
    transform: scale(1.05);
}

.navbar-toggler:focus {
    box-shadow: none;
}

/* Mobile Menu */
@media (max-width: 991.98px) {
    .navbar-collapse {
        background: white;
        border-radius: 12px;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
        margin-top: 1rem;
        padding: 1rem;
        border: 1px solid rgba(0, 0, 0, 0.1);
    }

    .navbar-nav {
        gap: 0.5rem;
    }

    .navbar-nav .nav-link {
        padding: 15px 20px !important;
        margin: 0;
        border-radius: 10px;
        font-size: 1.1rem;
    }

    .navbar-nav .nav-link:hover {
        background: rgba(0, 0, 0, 0.08);
        transform: translateX(10px);
    }

    .dropdown-menu {
        background: rgba(0, 0, 0, 0.02);
        border: none;
        box-shadow: none;
        margin: 0.5rem 0;
        padding: 0;
    }

    .dropdown-item {
        padding: 12px 30px;
        margin: 0;
        font-size: 1rem;
    }

    .dropdown-item:hover {
        background: rgba(0, 0, 0, 0.05);
        transform: translateX(15px);
    }

    .nav-link.contact-btn {
        margin: 1rem 0 0 0 !important;
        text-align: center;
        font-size: 1.2rem;
        padding: 18px 20px !important;
    }
}

/* Navbar Animation on Scroll */
.navbar-brand span {
    transition: all 0.3s ease;
}

@media (min-width: 992px) {
    .navbar.scrolled .navbar-brand span {
        opacity: 0;
        transform: translateX(-20px);
    }
}



/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Body Padding for Fixed Navbar */
body {
    padding-top: 80px;
}

@media (max-width: 991.98px) {
    body {
        padding-top: 70px;
    }
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--primary-color) !important;
    text-decoration: none;
    transition: all 0.3s ease;
}

.navbar-brand:hover {
    transform: scale(1.05);
}

.navbar-brand img {
    height: 35px;
    width: auto;
    transition: all 0.3s ease;
}

.navbar-nav {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 0.5rem;
}

.navbar-nav .nav-item {
    position: relative;
}

.navbar-nav .nav-link {
    color: var(--text-dark) !important;
    font-weight: 500;
    padding: 0.5rem 0.75rem;
    border-radius: 8px;
    transition: all 0.3s ease;
    text-decoration: none;
    display: block;
    white-space: nowrap;
    font-size: 0.9rem;
}

.navbar-nav .nav-link:hover {
    background: var(--bg-light);
    color: var(--primary-color) !important;
    transform: translateY(-1px);
}

.navbar-nav .nav-link i {
    margin-right: 0.4rem;
    font-size: 0.85rem;
}

.dropdown-toggle::after {
    content: '';
    border: none;
    margin-left: 0.4rem;
    vertical-align: 0.125em;
    border-top: 0.25em solid;
    border-right: 0.25em solid transparent;
    border-bottom: 0;
    border-left: 0.25em solid transparent;
    transition: transform 0.3s ease;
    display: inline-block;
}

.dropdown:hover .dropdown-toggle::after {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    z-index: 1000;
    display: none;
    min-width: 200px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    border-radius: 12px;
    padding: 0.5rem;
    background: var(--bg-white);
    list-style: none;
    margin: 0;
    margin-top: 0.5rem;
    opacity: 0;
    transform: translateY(-10px);
    transition: all 0.3s ease;
}

.dropdown:hover .dropdown-menu {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

.dropdown-item {
    padding: 0.6rem 0.8rem;
    border-radius: 8px;
    margin-bottom: 0.2rem;
    font-weight: 500;
    transition: all 0.2s ease;
    color: var(--text-dark);
    text-decoration: none;
    display: block;
    width: 100%;
    border: none;
    background: none;
    text-align: left;
    white-space: nowrap;
    font-size: 0.85rem;
}

.dropdown-item:hover {
    background: var(--bg-light);
    color: var(--primary-color);
    transform: translateX(3px);
}

.dropdown-item i {
    width: 16px;
    text-align: center;
}

/* Main Content */
.main-content {
    margin-top: 60px;
    min-height: calc(100vh - 60px);
}

/* Hero Section with Swiper */
.hero-section {
    background: var(--bg-white);
    padding: 2rem 0;
    border-bottom: 1px solid var(--border-color);
}

.hero-swiper {
    width: 100%;
    height: 500px;
    margin: 0;
}

.hero-swiper .swiper-slide {
    background: linear-gradient(135deg, rgba(0,0,0,0.7), rgba(51,51,51,0.8));
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 3rem;
    position: relative;
    overflow: hidden;
}

.slide-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0,0,0,0.6), rgba(51,51,51,0.7));
    z-index: 1;
}

.hero-content {
    text-align: center;
    max-width: 800px;
    position: relative;
    z-index: 2;
}

.hero-content h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-content p {
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    opacity: 0.9;
    line-height: 1.6;
}

.hero-date {
    font-size: 1rem;
    opacity: 0.8;
    margin-bottom: 1rem;
}

.hero-swiper .swiper-pagination-bullet {
    background: rgba(255, 255, 255, 0.5);
    opacity: 1;
    width: 12px;
    height: 12px;
}

.hero-swiper .swiper-pagination-bullet-active {
    background: white;
}

.hero-swiper .swiper-button-next,
.hero-swiper .swiper-button-prev {
    color: white;
    background: rgba(0, 0, 0, 0.3);
    width: 50px;
    height: 50px;
    border-radius: 50%;
}

.hero-swiper .swiper-button-next:hover,
.hero-swiper .swiper-button-prev:hover {
    background: rgba(0, 0, 0, 0.5);
}

/* Gallery Section */
.gallery-section {
    padding: 4rem 0;
    background: var(--bg-light);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 3rem;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.gallery-item {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    background: var(--bg-white);
}

.gallery-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.gallery-item img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.gallery-item:hover img {
    transform: scale(1.05);
}

.gallery-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
    color: white;
    padding: 1.5rem;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.gallery-item:hover .gallery-overlay {
    transform: translateY(0);
}

/* Sponsors Section with Swiper */
.sponsors-section {
    padding: 4rem 0;
    background: var(--bg-white);
}

.sponsors-swiper {
    width: 100%;
    height: 200px;
    margin: 2rem 0;
}

.sponsors-swiper .swiper-slide {
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.sponsors-swiper .swiper-slide:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.sponsors-swiper .swiper-slide img {
    max-height: 80px;
    max-width: 100%;
    object-fit: contain;
    margin-bottom: 1rem;
    filter: grayscale(100%);
    transition: filter 0.3s ease;
}

.sponsors-swiper .swiper-slide:hover img {
    filter: grayscale(0%);
}

.sponsors-swiper .swiper-slide h5 {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.sponsors-swiper .swiper-pagination-bullet {
    background: var(--text-muted);
    opacity: 0.5;
}

.sponsors-swiper .swiper-pagination-bullet-active {
    background: var(--primary-color);
    opacity: 1;
}

.sponsors-swiper .swiper-button-next,
.sponsors-swiper .swiper-button-prev {
    color: var(--primary-color);
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 0.95rem;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: var(--secondary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

/* Footer */
.footer {
    background: var(--bg-dark);
    color: white;
    padding: 3rem 0 1rem;
    margin-top: 4rem;
}

.footer h5 {
    color: white;
    margin-bottom: 1.5rem;
    font-weight: 700;
}

.footer a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer a:hover {
    color: white;
}

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

.footer-links li {
    margin-bottom: 0.5rem;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: rgba(255,255,255,0.2);
    transform: translateY(-2px);
}

/* Responsive */
@media (max-width: 1024px) {
    .navbar-nav {
        gap: 0.2rem;
    }

    .navbar-nav .nav-link {
        padding: 0.4rem 0.6rem;
        font-size: 0.85rem;
    }

    .navbar-brand img {
        height: 30px;
    }
}

@media (max-width: 768px) {
    .navbar {
        padding: 0.4rem 0;
    }

    .navbar.scrolled {
        padding: 0.2rem 0;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .hero-content p {
        font-size: 1.1rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .gallery-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .hero-swiper {
        height: 400px;
    }

    .sponsors-swiper {
        height: 180px;
    }

    .navbar-nav {
        flex-wrap: wrap;
        justify-content: center;
        gap: 0.15rem;
    }

    .navbar-nav .nav-link {
        padding: 0.35rem 0.5rem;
        font-size: 0.8rem;
    }

    .navbar-brand img {
        height: 28px;
    }

    .main-content {
        margin-top: 50px;
    }
}

/* Page Specific Styles */
.page-header {
    background: var(--bg-light);
    padding: 2rem 0;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.page-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.page-subtitle {
    font-size: 1.1rem;
    color: var(--text-light);
}

.content-section {
    padding: 3rem 0;
}

.card {
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.card-header {
    background: var(--bg-light);
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem;
    border-radius: 12px 12px 0 0;
}

.card-body {
    padding: 1.5rem;
}

/* Form Styles */
.form-control {
    border: 2px solid var(--border-color);
    border-radius: 6px;
    padding: 0.75rem;
    transition: all 0.3s ease;
    font-size: 1rem;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(0, 0, 0, 0.1);
    outline: none;
}

.form-label {
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 1.5rem; }
.mb-5 { margin-bottom: 3rem; }

.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 1.5rem; }
.mt-5 { margin-top: 3rem; }

.p-1 { padding: 0.25rem; }
.p-2 { padding: 0.5rem; }
.p-3 { padding: 1rem; }
.p-4 { padding: 1.5rem; }
.p-5 { padding: 3rem; }

.d-flex { display: flex; }
.d-block { display: block; }
.d-none { display: none; }

.justify-content-center { justify-content: center; }
.justify-content-between { justify-content: space-between; }
.align-items-center { align-items: center; }

.w-100 { width: 100%; }
.h-100 { height: 100%; }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -0.75rem;
}

.col-12 { flex: 0 0 100%; max-width: 100%; padding: 0 0.75rem; }
.col-6 { flex: 0 0 50%; max-width: 50%; padding: 0 0.75rem; }
.col-4 { flex: 0 0 33.333333%; max-width: 33.333333%; padding: 0 0.75rem; }
.col-3 { flex: 0 0 25%; max-width: 25%; padding: 0 0.75rem; }

@media (max-width: 768px) {
    .col-md-12 { flex: 0 0 100%; max-width: 100%; }
    .col-md-6 { flex: 0 0 100%; max-width: 100%; }
    .col-md-4 { flex: 0 0 100%; max-width: 100%; }
    .col-md-3 { flex: 0 0 100%; max-width: 100%; }
}