/* ========================================
   RESET & TYPOGRAPHY
   ======================================== */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    background-color: var(--color-bg);
}

body {
    margin: 0;
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-regular);
    line-height: var(--line-height-base);
    letter-spacing: 0.01em;
    background: radial-gradient(circle at 20% 20%, rgba(99, 102, 241, 0.12), transparent 45%),
        radial-gradient(circle at 80% 10%, rgba(236, 72, 153, 0.08), transparent 50%),
        linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
    color: var(--color-text);
    min-height: 100vh;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
    scroll-padding-top: 76px;
}

main {
    flex: 1;
    width: 100%;
}

img,
picture,
svg,
video {
    display: block;
    max-width: 100%;
    height: auto;
}

button,
input,
textarea,
select {
    font: inherit;
    color: inherit;
    letter-spacing: inherit;
}

input,
textarea,
select {
    background: transparent;
    border: none;
}

ul,
ol {
    padding: 0;
    margin: 0;
    list-style: none;
}

p {
    margin: 0 0 1rem;
    color: var(--color-text-muted);
}

strong {
    font-weight: var(--font-weight-semibold);
}

em {
    font-style: italic;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-base);
}

a:hover,
a:focus-visible {
    color: var(--color-primary);
}

small {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

code {
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 0.9em;
}

pre {
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 0.95rem;
    line-height: 1.6;
    overflow-x: auto;
}

table {
    border-collapse: collapse;
    width: 100%;
}

tbody tr + tr {
    border-top: 1px solid var(--color-border);
}

th,
td {
    padding: 0.85rem 0.5rem;
    text-align: left;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-family-display);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-heading);
    letter-spacing: var(--letter-spacing-tight);
    margin: 0 0 1rem;
    color: var(--color-text);
}

h1 {
    font-size: var(--font-size-4xl);
}

h2 {
    font-size: var(--font-size-3xl);
}

h3 {
    font-size: var(--font-size-2xl);
}

h4 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
}

h5 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
}

h6 {
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-wide);
}

.container {
    width: min(100% - var(--container-gutter) * 2, var(--container-width));
    margin-inline: auto;
}

section {
    padding-block: var(--section-spacing-y);
}

.section-title {
    display: inline-flex;
    flex-direction: column;
    gap: 0.35rem;
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    text-align: center;
    width: 100%;
    background: linear-gradient(120deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin: 0 auto var(--section-spacing-y) auto;
}

.section-title::after {
    content: '';
    width: 64px;
    height: 3px;
    border-radius: 999px;
    background: linear-gradient(120deg, var(--color-primary), var(--color-accent));
    margin: 0.35rem auto 0;
}

.text-center {
    text-align: center;
}

.visually-centered {
    display: grid;
    place-items: center;
}

.stack {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.flow > * + * {
    margin-top: 1.5rem;
}

hr {
    border: none;
    height: 1px;
    background: var(--color-border);
    margin: 2.5rem 0;
}

blockquote {
    margin: 0;
    padding: 1rem 1.5rem;
    border-left: 4px solid var(--color-primary);
    background: rgba(99, 102, 241, 0.12);
    border-radius: var(--radius-sm);
}

::selection {
    background: var(--color-primary);
    color: #fff;
}

::-webkit-scrollbar {
    width: 12px;
}

::-webkit-scrollbar-track {
    background: rgba(15, 23, 42, 0.6);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--color-primary), var(--color-secondary));
    border-radius: 999px;
    border: 2px solid rgba(15, 23, 42, 0.6);
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, var(--color-secondary), var(--color-accent));
}

:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 3px;
}

@media (max-width: 768px) {
    :root {
        --container-gutter: clamp(1rem, 4vw, 1.75rem);
        --section-spacing-y: clamp(2.75rem, 9vw, 4.5rem);
    }

    h1 {
        font-size: clamp(2.4rem, 8vw, 3.1rem);
    }

    h2 {
        font-size: clamp(2rem, 6.5vw, 2.6rem);
    }

    h3 {
        font-size: clamp(1.6rem, 5vw, 2rem);
    }

    .section-title::after {
        width: 48px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    .background-animation::before,
    .background-animation::after {
        display: none;
    }
}

.is-hidden {
    display: none !important;
}

.mt-4 {
    margin-top: 1rem;
}