:root {
    --primary-color: #2196f3;
    --primary-glow: rgba(33, 150, 243, 0.8);
    --secondary-color: #9c27b0;
    --text-color: #0a0a12;
    /* Changed to dark text */
    --bg-color: #ffffff;
    /* Changed to light background */
    --nav-bg: rgba(255, 255, 255, 0.8);
    /* Changed to light nav */
    --dropdown-bg: rgba(240, 240, 255, 0.9);
    /* Changed to light dropdown */
    --hover-color: #3f51b5;
    --border-color: rgba(0, 0, 0, 0.08);
    /* Changed to dark border */
    --shadow-color: rgba(0, 0, 0, 0.1);
    /* Lighter shadow */
    --neon-glow: 0 0 10px rgba(33, 150, 243, 0.5),
        0 0 20px rgba(33, 150, 243, 0.3),
        0 0 30px rgba(33, 150, 243, 0.1);
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-medium: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --gradient-bg: linear-gradient(135deg, var(--bg-color), #f0f4ff);
    /* Light gradient */
    --glass-effect: saturate(180%) blur(10px);
    --border-radius: 12px;
    --text-description: rgba(0, 0, 0, 0.7);
    /* Dark description text */
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--gradient-bg);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
}

/* Header and Navbar */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background: var(--nav-bg);
    backdrop-filter: var(--glass-effect);
    -webkit-backdrop-filter: var(--glass-effect);
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 4px 30px var(--shadow-color);
    transition: var(--transition-medium);
}

/* Logo */
.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 2px;
    text-shadow: var(--neon-glow);
    position: relative;
    display: inline-block;
    transition: var(--transition-medium);
}

.logo:hover {
    transform: translateY(-2px);
    text-shadow: 0 0 15px var(--primary-glow),
        0 0 30px var(--primary-glow);
}

.logo::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 2px;
    background: var(--primary-color);
    bottom: -4px;
    left: 0;
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--transition-medium);
    box-shadow: var(--neon-glow);
}

.logo:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

/* Navigation Menu */
.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-list {
    display: flex;
    gap: 1.5rem;
    list-style: none;
}

.nav-item {
    position: relative;
}

.nav-link {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    transition: all var(--transition-medium);
    display: flex;
    align-items: center;
    gap: 5px;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
    text-shadow: var(--neon-glow);
    background: rgba(255, 255, 255, 0.05);
    transform: translateY(-2px);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    transform: translateX(-50%);
    width: 5px;
    height: 5px;
    background-color: var(--primary-color);
    border-radius: 50%;
    box-shadow: var(--neon-glow);
}

/* Icons */
.icon {
    transition: var(--transition-medium);
    vertical-align: middle;
}

.chevron-icon {
    transition: transform var(--transition-medium);
}

.has-dropdown:hover .chevron-icon {
    transform: rotate(180deg);
}

.hidden {
    display: none;
}

/* Dropdown Menus */
.has-dropdown {
    position: relative;
}

.dropdown {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    min-width: 220px;
    background: var(--dropdown-bg);
    backdrop-filter: var(--glass-effect);
    -webkit-backdrop-filter: var(--glass-effect);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 0.5rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px) scale(0.98);
    transition: all var(--transition-medium);
    box-shadow: 0 10px 30px var(--shadow-color);
    z-index: 100;
}

.has-dropdown:hover .dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.dropdown::before {
    content: '';
    position: absolute;
    top: -6px;
    left: 20px;
    width: 12px;
    height: 12px;
    background: var(--dropdown-bg);
    border-left: 1px solid var(--border-color);
    border-top: 1px solid var(--border-color);
    transform: rotate(45deg);
    backdrop-filter: var(--glass-effect);
    -webkit-backdrop-filter: var(--glass-effect);
}

.dropdown li {
    list-style: none;
}

.dropdown a {
    color: var(--text-color);
    text-decoration: none;
    padding: 0.7rem 1rem;
    display: block;
    border-radius: var(--border-radius);
    transition: all var(--transition-medium);
    margin-bottom: 2px;
}

.dropdown a:hover {
    background: rgba(33, 150, 243, 0.15);
    color: var(--primary-color);
    transform: translateX(5px);
}

/* Search Bar */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.search-container {
    position: relative;
    display: flex;
    align-items: center;
}

.search-input {
    padding: 0.6rem 1rem;
    border: none;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-color);
    width: 180px;
    transition: all var(--transition-medium);
    font-size: 0.9rem;
}

.search-input:focus {
    outline: none;
    background: rgba(255, 255, 255, 0.15);
    width: 240px;
    box-shadow: 0 0 0 2px rgba(33, 150, 243, 0.3);
}

.search-input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.search-btn {
    background: none;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    padding: 0.5rem;
    position: absolute;
    right: 5px;
    transition: var(--transition-fast);
}

.search-btn:hover {
    color: var(--primary-color);
    transform: scale(1.1);
}

/* Theme Toggle */
.theme-toggle {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    cursor: pointer;
    padding: 0.6rem;
    font-size: 1.2rem;
    transition: all var(--transition-medium);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    color: var(--primary-color);
    text-shadow: var(--neon-glow);
    background: rgba(255, 255, 255, 0.15);
    transform: rotate(15deg);
}

/* Hamburger Menu */
.nav-toggle {
    display: none;
    cursor: pointer;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 0.6rem;
    transition: var(--transition-medium);
}

.nav-toggle:hover {
    background: rgba(255, 255, 255, 0.15);
}

.hamburger {
    width: 24px;
    height: 20px;
    position: relative;
}

.hamburger span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--text-color);
    position: absolute;
    transition: all var(--transition-medium);
    border-radius: 10px;
}

.hamburger span:first-child {
    top: 0;
}

.hamburger span:nth-child(2) {
    top: 9px;
    width: 70%;
}

.hamburger span:last-child {
    top: 18px;
}

/* Mobile Menu Active State */
.nav-active .hamburger span:first-child {
    transform: rotate(45deg);
    top: 9px;
}

.nav-active .hamburger span:nth-child(2) {
    opacity: 0;
    width: 0;
}

.nav-active .hamburger span:last-child {
    transform: rotate(-45deg);
    top: 9px;
}

/* Content Styling */
.content {
    /* margin-top: 70px; */
    padding: 2rem;
}

.hero {
    margin-top: 70px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 2rem;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 0 15px rgba(33, 150, 243, 0.3);
}

.hero p {
    font-size: 1.2rem;
    max-width: 600px;
    margin-bottom: 2rem;
    color: var(--text-description);
}

.cta-button {
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    padding: 0.8rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 30px;
    cursor: pointer;
    transition: var(--transition-medium);
    box-shadow: 0 5px 15px rgba(33, 150, 243, 0.4);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(33, 150, 243, 0.6);
}

.section {
    padding: 5rem 2rem;
}

.section h2 {
    text-align: center;
    margin-bottom: 3rem;
    font-size: 2.5rem;
    color: var(--primary-color);
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.feature {
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 2rem;
    transition: var(--transition-medium);
}

.feature:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.06);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    border-color: rgba(33, 150, 243, 0.3);
}

.feature h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.feature p {
    color: var(--text-description);
}

@media (width > 1111px) {
    .hero {
        height: 70vh;
    }
}

/* Responsive Design */
@media (max-width: 1111px) {

    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        right: -100%;
        flex-direction: column;
        align-items: flex-start;
        background: var(--nav-bg);
        backdrop-filter: var(--glass-effect);
        -webkit-backdrop-filter: var(--glass-effect);
        width: 80%;
        height: calc(100vh - 70px);
        padding: 2rem;
        transition: right var(--transition-slow);
        box-shadow: -10px 0 30px var(--shadow-color);
        border-left: 1px solid var(--border-color);
    }

    .nav-active .nav-menu {
        right: 0;
    }

    .nav-list {
        flex-direction: column;
        width: 100%;
        margin-bottom: 2rem;
    }

    .nav-item {
        width: 100%;
    }

    .nav-link {
        width: 100%;
        padding: 1rem;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-link.active::after {
        display: none;
    }

    .nav-link.active {
        background: rgba(33, 150, 243, 0.15);
    }

    .dropdown {
        position: static;
        width: 100%;
        background: rgba(0, 0, 0, 0.2);
        border: none;
        padding: 0;
        padding-left: 1rem;
        margin-left: 1rem;
        display: none;
        box-shadow: none;
        border-left: 1px solid var(--border-color);
        transform: none;
        transition: all var(--transition-medium);
    }

    .dropdown::before {
        display: none;
    }

    .has-dropdown.active .dropdown {
        display: block;
        opacity: 1;
        visibility: visible;
    }

    .dropdown a {
        padding: 0.8rem 1rem;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-actions {
        width: 100%;
        flex-direction: column;
        gap: 1rem;
    }

    .search-container {
        width: 100%;
    }

    .search-input,
    .search-input:focus {
        width: 100%;
    }

    .search-input {
        padding: 0.8rem 1rem;
    }

    .theme-toggle {
        align-self: flex-start;
    }

    .chevron-icon {
        position: absolute;
        right: 1rem;
    }

    .has-dropdown.active .chevron-icon {
        transform: rotate(180deg);
    }
}

@media (max-width: 576px) {
    .navbar {
        padding: 1rem;
    }

    .nav-menu {
        width: 100%;
    }

    .hero h1 {
        font-size: 2.2rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .content {
        padding: 1rem;
    }

    .section {
        padding: 3rem 1rem;
    }
}

/* ── Learn More Modal ─────────────────────────────────────── */
.lm-overlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 2000;
    background: rgba(0, 0, 0, 0.65);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    justify-content: center;
    align-items: center;
    padding: 1rem;
}

.lm-overlay.active {
    display: flex;
}

.lm-card {
    position: relative;
    background: rgba(255, 255, 255, 0.97);
    border-radius: 18px;
    max-width: 780px;
    width: 100%;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
    animation: lmFadeIn 0.3s ease;
}

@keyframes lmFadeIn {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.97);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.lm-close {
    position: sticky;
    top: 1rem;
    float: right;
    margin: 1rem 1.2rem 0 0;
    background: none;
    border: none;
    font-size: 1.8rem;
    line-height: 1;
    color: #555;
    cursor: pointer;
    transition: color 0.2s;
    z-index: 10;
}

.lm-close:hover {
    color: var(--primary-color);
}

.lm-body {
    padding: 1.5rem 2.2rem 2.2rem;
    clear: both;
}

.lm-body p {
    font-size: 1rem;
    line-height: 1.85;
    color: #333;
    margin-bottom: 1.3rem;
    text-align: justify;
    max-width: unset;
    width: 100%;
}

.lm-see-more {
    font-weight: 600;
    color: var(--primary-color) !important;
    margin-bottom: 0.5rem !important;
}

.lm-refs {
    list-style: disc;
    padding-left: 1.4rem;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.lm-refs li {
    font-size: 0.92rem;
    line-height: 1.7;
    color: #444;
    text-align: justify;
}

.lm-refs a {
    color: var(--primary-color);
    text-decoration: none;
    word-break: break-all;
}

.lm-refs a:hover {
    text-decoration: underline;
}

/* ── GisLib Logo with wobble ─────────────────────────────── */
@keyframes wobble {
    0% {
        transform: rotate(0deg);
    }

    15% {
        transform: rotate(-6deg);
    }

    30% {
        transform: rotate(5deg);
    }

    45% {
        transform: rotate(-4deg);
    }

    60% {
        transform: rotate(3deg);
    }

    75% {
        transform: rotate(-2deg);
    }

    90% {
        transform: rotate(1deg);
    }

    100% {
        transform: rotate(0deg);
    }
}

.gislib-logo {
    width: 160px;
    max-width: 80vw;
    margin-top: 1.8rem;
    cursor: pointer;
    border-radius: 12px;
    animation: wobble 2.4s ease-in-out infinite;
}

.gislib-logo:hover {
    animation: wobble 0.6s ease-in-out infinite;
}

/* ── Fullscreen banner overlay ───────────────────────────── */
.banner-overlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 3000;
    background: #f9f9f6;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: opacity 0.5s ease;
    overflow: hidden;
}

.banner-overlay.visible {
    display: flex;
}

.banner-overlay.fading-in {
    opacity: 1;
}

@keyframes bannerFadeOut {
    0% {
        opacity: 1;
    }

    100% {
        opacity: 0;
    }
}

.banner-overlay.fading-out {
    animation: bannerFadeOut 1.2s ease forwards;
}

.banner-img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
}