/* styles/main.css */

/* ------------------------------------------- */
/* 1. Global Styles & CSS Variables          */
/* ------------------------------------------- */

:root {
    /* Color Palette (Sophisticated Light Theme - Subhs.xyz inspired) */
    --clr-background-primary: #FFFFFF; /* Pure white for main backgrounds */
    --clr-background-secondary: #F9F9F9; /* Very subtle off-white for alternating sections/cards */
    --clr-text-primary: #1A1A1A; /* Near black for main headings/text */
    --clr-text-secondary: #4A4A4A; /* Dark gray for body text */
    --clr-text-tertiary: #888888; /* Medium gray for secondary descriptions/small text */
    --clr-accent: #007BFF; /* A vibrant, clean blue, matching subhs.xyz's primary accent */
    --clr-accent-hover: #0056b3; /* Darker blue for hover states */
    --clr-border: #EBEBEB; /* Very light gray for subtle borders */

    /* Shadows (carefully matched to subhs.xyz's subtle depth) */
    --clr-shadow-light: rgba(0, 0, 0, 0.03); /* Very subtle */
    --clr-shadow-medium: rgba(0, 0, 0, 0.07); /* For cards, buttons */
    --clr-shadow-strong: rgba(0, 0, 0, 0.1); /* For hover effects */

    /* Typography */
    --ff-primary: 'Inter', sans-serif; /* Main font for body and general text */
    --ff-heading: 'Poppins', sans-serif; /* Stylish font for headings */
    --ff-mono: 'Fira Code', monospace; /* For code snippets or special text */

    --fw-light: 300;
    --fw-regular: 400;
    --fw-medium: 500;
    --fw-semibold: 600;
    --fw-bold: 700;

    --fs-base: 1rem; /* 16px */
    --fs-h1: 4.5rem;   /* Larger hero title for impact */
    --fs-h2: 3rem; /* Section titles */
    --fs-h3: 2rem; /* Sub-headings */
    --fs-tagline: 1.8rem; /* Hero tagline */
    --fs-body: 1.15rem; /* Main paragraph text, slightly larger for readability */
}

/* Base styles for a clean slate */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 100%; /* Ensures 1rem = 16px by default */
}


body {
    font-family: var(--ff-primary);
    line-height: 1.7;
    color: var(--clr-text-secondary);
    /* IMPORTANT: This line MUST be commented out or removed for particles to be visible */
    /* background-color: var(--clr-background-primary); */
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    padding-bottom: 0; /* Managed by media queries for mobile nav */
    position: relative; /* Ensure body establishes a stacking context */
    /* Added for robust height calculation for background particles */
    min-height: 100vh;
}

/* Body Background Particles Canvas */
/* Body Background Particles Canvas */
.background-particles-canvas {
    position: fixed; /* Fixed to viewport */
    top: 0;
    left: 0;
    width: 100vw; /* Cover full viewport width */
    height: 100vh; /* Cover full viewport height */
    z-index: -1; /* Ensure it's behind all content */
    pointer-events: none; /* Allow clicks/interactions on elements above it */
    display: block;
    /* No background-color here, as the 3D scene will provide it */
}
/* General Text Styles */
p {
    margin-bottom: 1rem;
    font-size: var(--fs-body);
    line-height: 1.7;
}

/* Basic Link Styling */
a {
    color: var(--clr-accent);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--clr-accent-hover);
}

/* Image Reset */
img {
    max-width: 100%;
    height: auto;
    display: block; /* Removes extra space below images */
}

/* Code/Monospace Text */
code {
    font-family: var(--ff-mono);
    background-color: var(--clr-background-secondary);
    padding: 0.2em 0.4em;
    border-radius: 4px;
    font-size: 0.9em;
    color: var(--clr-text-primary);
}


/* ------------------------------------------- */
/* 2. Layout & Reusable Components             */
/* ------------------------------------------- */

.container {
    max-width: 1100px; /* Consistent with subhs.xyz's content width */
    margin: 0 auto; /* Center the container */
    padding: 0 2.5rem; /* Generous horizontal padding */
}

.section {
    padding: 10rem 0; /* Very generous vertical padding for distinct sections */
    position: relative; /* For potential animations/effects */
}

.light-bg-section {
    background-color: var(--clr-background-secondary); /* Alternating light background */
}

/* Headings */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--ff-heading);
    color: var(--clr-text-primary);
    line-height: 1.2;
    margin-bottom: 1.8rem; /* Spacing below headings */
    font-weight: var(--fw-bold);
    letter-spacing: -0.02em; /* Tighter letter spacing for headings */
}

h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); font-weight: var(--fw-semibold); }

/* Section Description */
.section-description {
    font-size: var(--fs-body);
    color: var(--clr-text-tertiary);
    max-width: 750px; /* Wider description for better flow */
    margin: 0 auto 5rem auto; /* More space below description */
    text-align: center;
    line-height: 1.6;
}