/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600&family=Playfair+Display:ital,wght@0,400;0,700;1,400&display=swap');

:root {
    --bg-color: #0b0b0b;
    --text-color: #ecf0f1;
    --accent-color: #c5a059;
    /* Muted Gold */
    --accent-hover: #e0b86c;
    --secondary-bg: #151515;
    --nav-bg: rgba(11, 11, 11, 0.95);

    --font-heading: 'Playfair Display', serif;
    --font-body: 'Inter', sans-serif;

    --transition-speed: 0.4s;
    --container-width: 1200px;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-speed);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 {
    font-size: 3.5rem;
}

h2 {
    font-size: 2.5rem;
    color: var(--accent-color);
}

h3 {
    font-size: 1.75rem;
}

p {
    margin-bottom: 1.5rem;
    font-weight: 300;
}

/* Container */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 2rem;
}

/* Header & Nav */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: background-color var(--transition-speed), padding var(--transition-speed);

    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

header.scrolled {
    background-color: var(--nav-bg);
    backdrop-filter: blur(10px);
}

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

.logo {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--accent-color);
    text-transform: uppercase;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links>li {
    position: relative;
}

.nav-links a {
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 500;
    opacity: 0.8;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--accent-color);
    opacity: 1;
}

/* Dropdown */
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--secondary-bg);
    min-width: 200px;
    padding: 1rem 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s ease;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

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

.dropdown-menu li a {
    display: block;
    padding: 0.5rem 1.5rem;
    text-transform: none;
    font-family: var(--font-heading);
    font-size: 1rem;
}

.dropdown-menu li a:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

/* Mobile Menu */
.hamburger {
    display: none;
    cursor: pointer;
    flex-direction: column;
    gap: 5px;
}

.hamburger span {
    width: 25px;
    height: 2px;
    background-color: var(--text-color);
    transition: 0.3s;
}

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: 80px;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: #000;
}

.hero-bg::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0.3), var(--bg-color));
}

.hero-bg img,
.hero-bg video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.6;
}

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

.hero-title {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s forwards 0.5s;
}

/* Common Page Header */
.page-header {
    position: relative;
    padding: 180px 0 100px;
    text-align: center;
    background: #000;
    overflow: hidden;
}

.page-header-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    opacity: 0.4;
}

.page-header-bg video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.page-header .container {
    position: relative;
    z-index: 2;
}

.hero-subtitle {
    font-size: 1.25rem;
    max-width: 600px;
    margin-bottom: 2rem;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s forwards 0.8s;
}

.btn {
    display: inline-block;
    padding: 1rem 3rem;
    background-color: transparent;
    border: 1px solid var(--accent-color);
    color: var(--accent-color);
    font-family: var(--font-heading);
    font-size: 1rem;
    letter-spacing: 1px;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn:hover {
    background-color: var(--accent-color);
    color: #000;
}

/* Sections General */
section {
    padding: 6rem 0;
}

.section-header {
    margin-bottom: 4rem;
}

.section-title {
    font-size: 3rem;
    margin-bottom: 1rem;
}

/* Fields of Activity Home Grid */
.activity-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0;
    /* No gap for modern seamless look */
}

.activity-item {
    position: relative;
    height: 400px;
    /* or aspect-ratio */
    overflow: hidden;
}

.activity-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

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

.activity-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transition: background 0.3s;
}

.activity-item:hover .activity-overlay {
    background: rgba(0, 0, 0, 0.6);
}

.activity-name {
    font-family: var(--font-heading);
    font-size: 2rem;
    color: #fff;
    transform: translateY(20px);
    transition: transform 0.4s ease, opacity 0.4s ease;
}

/* No Card Look for References */
/* Logo Carousel */
.logo-carousel {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 2rem;
    scrollbar-width: thin;
    /* Firefox */
    scrollbar-color: var(--accent-color) var(--secondary-bg);
}

.logo-carousel::-webkit-scrollbar {
    height: 8px;
}

.logo-carousel::-webkit-scrollbar-track {
    background: var(--secondary-bg);
}

.logo-carousel::-webkit-scrollbar-thumb {
    background-color: var(--accent-color);
    border-radius: 4px;
}

.logo-track {
    display: flex;
    gap: 4rem;
    width: max-content;
    /* Ensure it takes full width of children */
    padding: 0 1rem;
}

.ref-logo {
    width: 250px;
    height: 150px;
    background: rgba(255, 255, 255, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    filter: grayscale(100%);
    transition: filter 0.3s, transform 0.3s;
    font-size: 1.5rem;
    font-family: var(--font-heading);
    color: #555;
    flex-shrink: 0;
    /* Prevent shrinking */
}

.ref-logo:hover {
    filter: grayscale(0%);
    transform: scale(1.05);
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
}

/* Footer */
footer {
    padding: 4rem 0 2rem;
    background-color: #000;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    text-align: center;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    text-align: left;
    margin-bottom: 3rem;
}

.copyright {
    font-size: 0.8rem;
    opacity: 0.5;
}

/* Animations */
@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-section {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
    will-change: opacity, visibility;
}

.fade-in-section.is-visible {
    opacity: 1;
    transform: none;
}

/* Tablet & Mobile */
@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: 0;
        height: 100vh;
        width: 80%;
        background-color: var(--secondary-bg);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        transform: translateX(100%);
        transition: transform 0.3s ease-in-out;
        z-index: 999;
    }

    .nav-links.nav-active {
        transform: translateX(0);
    }

    .hamburger {
        display: flex;
        z-index: 1000;
    }

    .activity-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }
}