* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 5.5rem;
    color-scheme: dark;
    background-color: var(--bg-deep, #07040d);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-deep);
    color: var(--text-main);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

button, input, select, textarea {
    font-family: inherit;
}

/* Atmospheric Ambient Background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(ellipse 70% 50% at 50% -10%, rgba(139, 92, 246, 0.22) 0%, transparent 60%),
        radial-gradient(ellipse 50% 40% at 85% 65%, rgba(56, 189, 248, 0.12) 0%, transparent 50%),
        radial-gradient(ellipse 45% 35% at 15% 45%, rgba(168, 85, 247, 0.16) 0%, transparent 50%),
        radial-gradient(circle 400px at 50% 90%, rgba(124, 58, 237, 0.1) 0%, transparent 70%);
    pointer-events: none;
    z-index: -2;
}

/* Subtle Tech Grid / Scanline Texture */
body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(to right, rgba(139, 92, 246, 0.03) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(139, 92, 246, 0.03) 1px, transparent 1px);
    background-size: 48px 48px;
    pointer-events: none;
    z-index: -1;
}

/* Focus Rings for Keyboard Accessibility */
:focus-visible {
    outline: 2px solid var(--primary-light);
    outline-offset: 3px;
}

/* Selection Styling */
::selection {
    background: var(--primary);
    color: #ffffff;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 9px;
}

::-webkit-scrollbar-track {
    background: var(--bg-deep);
}

::-webkit-scrollbar-thumb {
    background: #2b184d;
    border-radius: 5px;
    border: 2px solid var(--bg-deep);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

/* Accessibility: Visually Hidden for Screen Readers */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
    border: 0;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    width: 100%;
}

/* Section Header Shared Component */
.section-header {
    text-align: center;
    max-width: 780px;
    margin: 0 auto 3.5rem;
    position: relative;
    z-index: 1;
}

.section-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 0.95rem;
    background: rgba(139, 92, 246, 0.1);
    border: 1px solid rgba(139, 92, 246, 0.25);
    border-radius: 9999px;
    color: var(--primary-light);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 1rem;
    box-shadow: 0 2px 10px rgba(124, 58, 237, 0.1);
}

.section-tag svg {
    width: 14px;
    height: 14px;
    stroke: currentcolor;
}

.section-title {
    font-size: clamp(2rem, 3.5vw, 2.75rem);
    font-weight: 800;
    letter-spacing: -0.025em;
    line-height: 1.2;
    margin-bottom: 1rem;
}

.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.section-description {
    font-size: 1.075rem;
    color: var(--text-secondary);
    line-height: 1.65;
}