/* Base styles and light theme variables */
:root {
    --bg-color: #FFFFFF;
    --text-color: #111827;
    --primary-color: #023E8A;
    --secondary-color: #82EEFD;
    --accent-color: #00FFEF;
    --card-bg-color: #F9FAFB;
    --header-bg-color: rgba(255, 255, 255, 0.8);
    --shadow-color: rgba(0, 0, 0, 0.1);
    --dot-base-color: rgba(0, 0, 0, 0.12);
}

/* Dark theme variables */
html.dark {
    --bg-color: #0A192F;
    --text-color: #E2E8F0;
    --primary-color: #82EEFD;
    --secondary-color: #00FFEF;
    --accent-color: #023E8A;
    --card-bg-color: #1E293B;
    --header-bg-color: rgba(10, 25, 47, 0.8);
    --shadow-color: rgba(0, 0, 0, 0.4);
    --dot-base-color: rgba(255, 255, 255, 0.12);
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Inter', sans-serif;
    transition: background-color 0.3s ease, color 0.3s ease;
    position: relative;
    overflow-x: hidden;
}

/* Canvas for background effect */
.wave-canvas {
    position: fixed;
    top: 0;
    height: 100%;
    width: 10vw;
    z-index: -1;
}
#left-wave {
    left: 0;
}
#right-wave {
    right: 0;
}

/* Custom font for headers */
.font-varela {
    font-family: 'Varela Round', sans-serif;
}

/* Smooth scrolling behavior */
html {
    scroll-behavior: smooth;
}

/* Header styles for backdrop blur effect */
header {
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    background-color: var(--header-bg-color);
    transition: background-color 0.3s ease;
}

/* Custom card shadow */
.card-shadow {
        box-shadow: 0 4px 6px -1px var(--shadow-color), 0 2px 4px -2px var(--shadow-color);
        transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.card-shadow:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px -3px var(--shadow-color), 0 4px 6px -2px var(--shadow-color);
}

/* Custom button styles */
.btn-primary {
    background-color: var(--primary-color);
    color: var(--bg-color);
}
.btn-primary:hover {
    opacity: 0.9;
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}
.btn-secondary:hover {
        background-color: var(--primary-color);
        color: var(--bg-color);
}

/* Custom link styles */
.nav-link {
    position: relative;
    color: var(--text-color);
    transition: color 0.3s ease;
}
.nav-link:hover {
    color: var(--primary-color);
}
.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}
.nav-link:hover::after {
    width: 100%;
}

/* Custom tag style */
.tag {
    background-color: var(--primary-color);
    color: var(--bg-color);
    font-weight: 500;
}
html.dark .tag {
        background-color: var(--primary-color);
        color: #0A192F; /* Dark text for light background in dark mode */
}

/* Scroll animation styles */
.fade-in-section {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.fade-in-section.visible {
    opacity: 1;
    transform: translateY(0);
}