/* custom.css */
:root {
    --primary-color: #007BFF;
    --secondary-color: #6C757D;
    --light-bg: #FFFFFF;
    --light-surface: #F8F9FA;
    --light-text: #212529;
    --dark-bg: #0a192f;
    --dark-surface: #172a45;
    --dark-text: #E0E0E0;
    --accent-gradient: linear-gradient(45deg, #007BFF, #00C6FF);
    --border-radius-sm: 0.25rem;
    --border-radius-md: 0.5rem;
    --border-radius-lg: 1rem;
}

body {
    font-family: 'Roboto', sans-serif;
    background-color: var(--light-bg);
    color: var(--light-text);
    transition: background-color 0.3s ease, color 0.3s ease;
}

body.dark-mode {
    background-color: var(--dark-bg);
    color: var(--dark-text);
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
}

.navbar {
    transition: background-color 0.3s ease;
}

body.dark-mode .navbar {
    background-color: var(--dark-surface) !important;
}

.hero {
    padding: 6rem 0;
    background: var(--accent-gradient);
    color: white;
}

.btn-primary {
    background: var(--accent-gradient);
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius-lg);
    font-weight: 600;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 123, 255, 0.4);
}

.section {
    padding: 4rem 0;
}

.floating-card {
    background-color: var(--light-surface);
    border: none;
    border-radius: var(--border-radius-lg);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease, background-color 0.3s ease;
    opacity: 0;
    transform: translateY(30px);
}

.floating-card.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.floating-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
}

body.dark-mode .floating-card {
    background-color: var(--dark-surface);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

body.dark-mode .floating-card:hover {
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

.theme-toggle {
    cursor: pointer;
    font-size: 1.25rem;
}

footer {
    background-color: var(--light-surface);
    transition: background-color 0.3s ease;
}

body.dark-mode footer {
    background-color: var(--dark-surface);
}