:root {
    --text-color: #2d3748;
    --bg-color: #ffffff;
    --bg-secondary: #f7fafc;
    --border-color: #e2e8f0;
    --accent-color: #4299e1;
    --accent-gradient: linear-gradient(45deg, #4299e1, #9f7aea, #f56565, #4299e1);
    --transition: all 0.3s ease;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

@media (prefers-color-scheme: dark) {
    :root {
        --text-color: #e2e8f0;
        --bg-color: #1a202c;
        --bg-secondary: #2d3748;
        --border-color: #4a5568;
        --accent-color: #63b3ed;
        --accent-gradient: linear-gradient(45deg, #63b3ed, #b794f4, #ed8936, #63b3ed);
    }
}

@keyframes lavaFlow {
    0% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }

    100% {
        background-position: 0% 50%;
    }
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 100px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.7;
    margin: 0;
    padding-top: 70px;
    color: var(--text-color);
    background: var(--bg-color);
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 20px;
}

.main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 70px;
    background-color: transparent;
    border-bottom: 1px solid transparent;
    z-index: 1000;
    transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.main-header.header-scrolled {
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: saturate(180%) blur(5px);
    -webkit-backdrop-filter: saturate(180%) blur(5px);
    border-bottom-color: var(--border-color);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

.logo {
    font-size: 1.5em;
    font-weight: 700;
    color: var(--text-color);
    text-decoration: none;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 25px;
}

.nav-links-container {
    display: flex;
    align-items: center;
    gap: 25px;
}

.nav-link {
    font-weight: 600;
    font-size: 1em;
    color: var(--text-color);
    text-decoration: none;
    transition: var(--transition);
}

.nav-link:hover,
.nav-link i:hover,
.nav-link.active {
    color: var(--accent-color);
}

.nav-item {
    position: relative;
}

/* --- CSS FIX STARTS HERE --- */

/* REMOVE the hover-bridge CSS rule. It's no longer needed. */

/* CHANGE the selector from ':hover' to the new '.is-active' class */
.nav-item.has-dropdown.is-active .dropdown-menu {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

/* --- CSS FIX ENDS HERE --- */

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    background-color: var(--bg-color);
    border-radius: 8px;
    box-shadow: var(--shadow);
    padding: 10px;
    margin-top: 10px;
    list-style: none;
    opacity: 0;
    transform: translateY(-10px);
    pointer-events: none;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.dropdown-menu a {
    display: block;
    padding: 10px 15px;
    color: var(--text-color);
    text-decoration: none;
    border-radius: 6px;
    font-weight: 500;
}

.dropdown-menu a:hover {
    background-color: var(--bg-secondary);
    color: var(--accent-color);
}

.hero h1,
.product-hero h1 {
    font-weight: 700;
    letter-spacing: -1.5px;
    margin-bottom: 0.3em;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-size: 300% 300%;
    animation: lavaFlow 15s ease-in-out infinite;
}

footer {
    text-align: center;
    padding: 40px 20px;
    margin-top: 80px;
    font-size: 0.9em;
    background-color: rgba(247, 250, 252, 0.8);
    backdrop-filter: saturate(180%) blur(5px);
    -webkit-backdrop-filter: saturate(180%) blur(5px);
    border-top: 1px solid var(--border-color);
}

@media (prefers-color-scheme: dark) {
    .main-header.header-scrolled {
        background-color: rgba(26, 32, 44, 0.8);
    }

    .dropdown-menu {
        background-color: #2d3748;
    }

    .dropdown-menu a:hover {
        background-color: #4a5568;
    }

    footer {
        background-color: rgba(45, 55, 72, 0.8);
    }
}

.social-links {
    margin-bottom: 20px;
}

.social-links a {
    color: var(--text-color);
    font-size: 1.6em;
    margin: 0 12px;
    text-decoration: none;
    transition: var(--transition);
}

.social-links a:hover {
    color: var(--accent-color);
}

footer a {
    color: var(--accent-color);
    text-decoration: none;
}

footer a:hover {
    opacity: 0.8;
}

.footer-links {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
    margin: 10px 0;
}

.footer-links a {
    color: var(--text-light);
}

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

.mobile-menu-toggle {
    display: none;
}

@media (max-width: 768px) {
    body {
        padding-top: 70px;
    }

    .main-header {
        height: 70px;
    }

    .mobile-menu-toggle {
        display: block;
        background: none;
        border: none;
        color: var(--text-color);
        font-size: 1.5rem;
        cursor: pointer;
    }

    .nav-links-container {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        background-color: var(--bg-color);
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        transform: translateY(-120%);
        transition: transform 0.4s ease;
        box-shadow: var(--shadow);
    }

    .nav-links-container.is-open {
        transform: translateY(0);
    }

    .dropdown-menu {
        position: static;
        opacity: 1;
        transform: none;
        box-shadow: none;
        border: none;
        padding-left: 20px;
        margin-top: 10px;
        background-color: transparent;
    }

    .nav-link,
    .nav-item {
        width: 100%;
        text-align: left;
    }

    .main-nav a.nav-link {
        display: block;
        padding: 10px 0;
    }

    .main-nav a.nav-link i {
        display: none;
    }

    .nav-item .nav-link {
        font-size: 1.2rem;
    }

    .dropdown-menu a {
        font-size: 1rem;
    }
}
/* ===== Filter Buttons Styles ===== */
.filter-container {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 30px;
    flex-wrap: wrap;
    padding: 10px 0;
}

.filter-btn {
    padding: 8px 16px;
    background-color: var(--bg-secondary);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.9em;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: var(--shadow);
}

.filter-btn:hover {
    background-color: var(--bg-color);
    border-color: var(--accent-color);
    transform: translateY(-2px);
}

.filter-btn.active {
    background-color: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 
                0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

/* Animation for filter changes */
.project-grid {
    transition: opacity 0.3s ease;
}

.project-grid.filtering {
    opacity: 0.5;
}