:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --bg-gradient-start: #0f172a;
    --bg-gradient-end: #1e293b;
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --card-bg: rgba(255, 255, 255, 0.05);
    --card-hover: rgba(255, 255, 255, 0.1);
}

[data-bs-theme="light"] {
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --bg-gradient-start: #f8fafc;
    --bg-gradient-end: #e2e8f0;
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.5);
    --text-main: #1e293b;
    --text-muted: #64748b;
    --card-bg: rgba(255, 255, 255, 0.6);
    --card-hover: rgba(255, 255, 255, 0.8);
}

body {
    font-family: 'Outfit', sans-serif;
    background: linear-gradient(135deg, var(--bg-gradient-start), var(--bg-gradient-end));
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    transition: background 0.3s ease, color 0.3s ease;
}

/* Background Image Overlay */
.bg-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('bg2.png');
    background-size: cover;
    background-position: center;
    opacity: 0.4;
    z-index: -1;
    filter: blur(20px);
}

[data-bs-theme="light"] .bg-overlay {
    opacity: 0.15;
}

/* Glass Container */
.glass-container {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 2rem;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
    margin-top: 2rem;
    margin-bottom: 2rem;
    animation: fadeInUp 0.8s ease-out;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    letter-spacing: -0.025em;
}

.lead {
    color: var(--text-muted);
    font-weight: 400;
}

/* Navigation */
.nav-masthead {
    display: flex;
    justify-content: center;
    gap: 2rem;
    /* Added gap for better spacing */
}

.nav-masthead .nav-link {
    color: var(--text-muted);
    border-bottom: 2px solid transparent;
    transition: color 0.2s, border-bottom-color 0.2s;
    font-weight: 600;
}

.nav-masthead .nav-link:hover,
.nav-masthead .nav-link:focus {
    color: var(--text-main);
}

.nav-masthead .nav-link.active {
    color: var(--text-main);
    border-bottom-color: var(--primary-color);
}

/* Download Cards */
.download-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.download-card {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 1.5rem;
    text-decoration: none;
    color: var(--text-main);
    transition: transform 0.2s, background 0.2s, box-shadow 0.2s;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    cursor: pointer;
    /* Ensure pointer cursor */
}

.download-card:hover {
    background: var(--card-hover);
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    color: var(--text-main);
}

.download-card .icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.download-card .title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.download-card .subtitle {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* Buttons */
.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

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

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

/* Download Arrow Animation */
.download-arrow {
    position: fixed;
    top: 20px;
    right: 80px;
    /* Adjust based on typical browser download location */
    font-size: 3rem;
    color: var(--primary-color);
    z-index: 2000;
    opacity: 0;
    pointer-events: none;
    transform: translateY(20px) rotate(-45deg);
}

.download-arrow.active {
    animation: bounceArrow 2s ease-in-out infinite;
    opacity: 1;
}

@keyframes bounceArrow {

    0%,
    100% {
        transform: translateY(0) rotate(-45deg);
    }

    50% {
        transform: translateY(-20px) rotate(-45deg);
    }
}

/* Theme Toggle */
.bd-mode-toggle {
    z-index: 1500;
}

.btn-theme-toggle {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-main);
    backdrop-filter: blur(4px);
}

.btn-theme-toggle:hover {
    background: var(--card-hover);
    color: var(--text-main);
}

.dropdown-menu {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
}

.dropdown-item {
    color: var(--text-main);
}

.dropdown-item:hover {
    background: var(--card-hover);
    color: var(--text-main);
}

.dropdown-item.active,
.dropdown-item:active {
    background-color: var(--primary-color);
    color: white;
}