/* ======================================================
   1. ROOT VARIABLES & BASE SETUP
   ====================================================== */
:root {
    /* Color Palette */
    --slate-900: #0f172a;
    --slate-800: #1e293b;
    --slate-700: #334155;
    --slate-600: #475569;
    --slate-300: #cbd5e1;
    --white: #f8fafc;
    --sky: #0ea5e9;
    --amber: #f59e0b;
    --amber-light: #fcd34d;

    /* Transitions & Animations */
    --transition-fast: all 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --transition-medium: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Base body styling */
body {
    background-color: var(--slate-900);
    font-family: 'Inter', sans-serif;
    scroll-behavior: smooth;
    overflow-x: hidden; /* Prevent horizontal scroll */
}

/* Custom Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--slate-800);
}
::-webkit-scrollbar-thumb {
    background: var(--slate-700);
    border-radius: 10px;
    transition: var(--transition-fast);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--sky);
}

/* ======================================================
   2. HEADER STYLING (Glassmorphism Effect)
   ====================================================== */
.main-header {
    background-color: rgba(15, 23, 42, 0.85); /* Semi-transparent background */
    backdrop-filter: blur(12px); /* The "frosted glass" effect */
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--slate-800);
    transition: var(--transition-medium);
}

#logo img {
    transition: var(--transition-medium);
}

#logo:hover img {
    transform: scale(1.05) rotate(-2deg);
    filter: drop-shadow(0 0 10px rgba(14, 165, 233, 0.4));
}

/* Advanced Nav Link Hover Effect */
.nav-link {
    position: relative;
    padding: 4px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--sky);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.4s cubic-bezier(0.19, 1, 0.22, 1);
}

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

/* Theme toggle button animation */
#theme-toggle i {
    transition: transform 0.5s ease-in-out, color 0.3s;
}
#theme-toggle:hover i {
    transform: scale(1.1) rotate(180deg);
    color: var(--sky);
}

/* ======================================================
   3. MAIN CONTENT ANIMATIONS & STYLING
   ====================================================== */
main {
    animation: fadeIn 0.8s ease-out forwards;
}

/* Animated Gradient on Main Title */
main h1 {
    background: linear-gradient(90deg, var(--sky), var(--white), var(--sky));
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradientShine 5s linear infinite;
}

/* Main Content Box Styling */
.bg-slate-800 {
    position: relative;
    background: radial-gradient(circle at 100% 0%, var(--slate-700) 0%, var(--slate-800) 40%);
    border: 1px solid var(--slate-700);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    overflow: hidden; /* Important for pseudo-elements */
    animation: slideInUp 0.7s ease-out forwards;
}

/* Shiny hover effect on the content box */
.bg-slate-800::before {
    content: '';
    position: absolute;
    top: 0;
    left: -150%;
    width: 70%;
    height: 100%;
    background: linear-gradient(to right, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, 0.1) 50%, rgba(255, 255, 255, 0) 100%);
    transform: skewX(-25deg);
    transition: left 0.8s ease-in-out;
}

.bg-slate-800:hover::before {
    left: 150%;
}

/* Disclaimer Box */
.text-amber-300 {
    border-left: 3px solid var(--amber);
    animation: pulseGlow 2.5s infinite;
}

/* Section headings */
h2, h3 {
    position: relative;
}

/* List item styling */
ul li {
    position: relative;
    padding-left: 1.2rem;
    transition: var(--transition-fast);
}

ul li::before {
    content: '→'; /* Custom list marker */
    position: absolute;
    left: 0;
    color: var(--sky);
    transition: var(--transition-fast);
}

ul li:hover {
    color: var(--white);
    transform: translateX(5px);
}
ul li:hover::before {
    transform: rotate(360deg);
    color: var(--amber-light);
}

/* ======================================================
   4. KEYFRAME ANIMATIONS
   ====================================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes gradientShine {
    to {
        background-position: -200% center;
    }
}

@keyframes pulseGlow {
    0% {
        box-shadow: 0 0 5px rgba(245, 158, 11, 0.1), 0 0 10px rgba(245, 158, 11, 0.1);
    }
    50% {
        box-shadow: 0 0 20px rgba(245, 158, 11, 0.4), 0 0 30px rgba(245, 158, 11, 0.3);
    }
    100% {
        box-shadow: 0 0 5px rgba(245, 158, 11, 0.1), 0 0 10px rgba(245, 158, 11, 0.1);
    }
}