/* Global design tokens */
:root {
    --color-background: #fafbfc;
    --color-surface: #ffffff;
    --color-surface-alt: #f0f6ff;
    --color-accent: #2563eb;
    --color-accent-hover: #1d4ed8;
    --color-accent-soft: rgba(37, 99, 235, 0.08);
    --color-purple: #7c3aed;
    --color-text: #0f172a;
    --color-text-muted: #64748b;
    --color-border: #e2e8f0;
    --color-highlight: #0f172a;
    --color-highlight-text: #ffffff;
    --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.05);
    --shadow-sm: 0 4px 12px -4px rgba(15, 23, 42, 0.12);
    --shadow-md: 0 12px 24px -8px rgba(15, 23, 42, 0.15);
    --shadow-lg: 0 20px 40px -12px rgba(15, 23, 42, 0.2);
    --shadow-xl: 0 24px 48px -12px rgba(15, 23, 42, 0.25);
    --shadow-glow: 0 0 0 1px rgba(37, 99, 235, 0.12), 0 8px 24px -8px rgba(37, 99, 235, 0.35);
    --radius-xl: 32px;
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 12px;
    --radius-xs: 8px;
    --container-width: min(1140px, 92vw);
    --transition-smooth: 220ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 320ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background-color: var(--color-background);
    background-image:
        radial-gradient(circle at 15% 10%, rgba(99, 102, 241, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 85% 90%, rgba(168, 85, 247, 0.05) 0%, transparent 50%);
    background-attachment: fixed;
    color: var(--color-text);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-smooth), transform var(--transition-smooth);
}

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

a:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 4px;
    border-radius: var(--radius-xs);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

.container {
    width: var(--container-width);
    margin: 0 auto;
}

.page-content {
    padding-top: 104px;
}

/* Header / navigation */
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background-color: rgba(250, 251, 252, 0.75);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border-bottom: 1px solid rgba(226, 232, 240, 0.5);
    transition: all var(--transition-smooth);
}

.site-header--scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-sm);
    border-bottom-color: rgba(226, 232, 240, 0.8);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 80px;
    gap: 16px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: 0.02em;
}

.brand-logo {
    height: 40px;
    width: auto;
    display: block;
    transition: transform var(--transition-smooth), filter var(--transition-smooth);
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.brand:hover .brand-logo {
    transform: scale(1.05);
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.15));
}

.brand-logo--small {
    height: 30px;
    filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.1));
}

.brand-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
    color: #ffffff;
    font-size: 0.95rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    box-shadow: var(--shadow-glow);
    transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.brand-mark::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.2), transparent);
    opacity: 0;
    transition: opacity var(--transition-smooth);
}

.brand-mark:hover::before {
    opacity: 1;
}

.brand:hover .brand-mark {
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 0 0 1px rgba(37, 99, 235, 0.15), 0 12px 28px -8px rgba(37, 99, 235, 0.45);
}

.brand-mark--small {
    width: 34px;
    height: 34px;
    border-radius: var(--radius-xs);
    font-size: 0.8rem;
}

.site-nav {
    display: flex;
    align-items: center;
}

.site-nav__list {
    display: flex;
    align-items: center;
    gap: 28px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.site-nav__link {
    font-weight: 500;
    color: var(--color-text-muted);
    font-size: 0.95rem;
    padding: 6px 0;
    position: relative;
    transition: color var(--transition-smooth);
}

.site-nav__link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-purple));
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--transition-smooth);
    border-radius: 2px;
}

.site-nav__link:hover,
.site-nav__link:focus-visible {
    color: var(--color-accent);
}

.site-nav__link:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
}

.nav-toggle__bar {
    display: block;
    width: 26px;
    height: 3px;
    border-radius: 999px;
    background-color: var(--color-text);
    transition: transform var(--transition-fast), opacity var(--transition-fast);
    margin: 5px 0;
}

/* Buttons */
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border-radius: 999px;
    padding: 13px 26px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--transition-smooth);
    border: 1px solid transparent;
    position: relative;
    overflow: hidden;
    white-space: nowrap;
}

.button::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.2), transparent);
    opacity: 0;
    transition: opacity var(--transition-smooth);
}

.button:hover::before {
    opacity: 1;
}

.button:active {
    transform: translateY(0) scale(0.98);
}

.button--primary {
    background: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
    color: #ffffff;
    box-shadow: var(--shadow-glow);
}

.button--primary:hover,
.button--primary:focus-visible {
    transform: translateY(-2px);
    box-shadow: 0 0 0 1px rgba(37, 99, 235, 0.15), 0 16px 32px -8px rgba(37, 99, 235, 0.45);
}

.button--secondary {
    background-color: var(--color-accent-soft);
    color: var(--color-accent);
    border-color: rgba(37, 99, 235, 0.15);
}

.button--secondary:hover,
.button--secondary:focus-visible {
    background-color: rgba(37, 99, 235, 0.14);
    border-color: rgba(37, 99, 235, 0.25);
    transform: translateY(-1px);
}

.button--ghost {
    background-color: rgba(255, 255, 255, 0.5);
    border-color: rgba(226, 232, 240, 0.8);
    color: var(--color-text);
    backdrop-filter: blur(8px);
}

.button--ghost:hover,
.button--ghost:focus-visible {
    color: var(--color-accent);
    border-color: var(--color-accent);
    background-color: rgba(255, 255, 255, 0.8);
    transform: translateY(-1px);
}

.button.button--small {
    padding: 10px 20px;
    font-size: 0.875rem;
}

/* Hero */
.hero {
    padding: 140px 0 100px;
    background:
        radial-gradient(circle at 20% 15%, rgba(99, 102, 241, 0.12) 0%, transparent 45%),
        radial-gradient(circle at 85% 20%, rgba(168, 85, 247, 0.10) 0%, transparent 50%),
        radial-gradient(circle at 50% 80%, rgba(37, 99, 235, 0.06) 0%, transparent 60%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 60%;
    height: 120%;
    background: radial-gradient(circle, rgba(124, 58, 237, 0.08) 0%, transparent 70%);
    animation: float 20s ease-in-out infinite;
    pointer-events: none;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(-20px, -30px) rotate(5deg); }
    66% { transform: translate(20px, 30px) rotate(-5deg); }
}

.hero__inner {
    display: grid;
    gap: 56px;
    grid-template-columns: repeat(12, 1fr);
    position: relative;
    z-index: 1;
}

.hero__content {
    grid-column: span 7;
    animation: fadeInUp 0.8s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero__aside {
    grid-column: span 5;
    display: flex;
    justify-content: flex-end;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero__eyebrow {
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    color: var(--color-accent);
    margin-bottom: 14px;
}

.hero__title {
    font-size: clamp(2.75rem, 5.5vw, 4rem);
    line-height: 1.12;
    margin: 0 0 20px;
    font-weight: 700;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-text) 70%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero__subtitle {
    font-size: 1.15rem;
    max-width: 540px;
    color: var(--color-text-muted);
    margin: 0 0 36px;
    line-height: 1.7;
}

.hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.hero__card {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.95) 0%, rgba(255, 255, 255, 0.9) 100%);
    border-radius: var(--radius-lg);
    padding: 32px;
    width: min(380px, 100%);
    box-shadow: var(--shadow-xl);
    border: 1px solid rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

.hero__card:hover {
    transform: translateY(-4px);
    box-shadow: 0 28px 56px -16px rgba(15, 23, 42, 0.3);
}

.hero__card-title {
    font-weight: 700;
    margin-bottom: 18px;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: 0.75rem;
}

.hero__list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 14px;
    font-weight: 500;
    font-size: 0.98rem;
}

.hero__list li {
    padding-left: 22px;
    position: relative;
    color: var(--color-text);
}

.hero__list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: 700;
}

/* Sections */
.section {
    padding: 80px 0;
}

.section--alt {
    background-color: var(--color-surface-alt);
}

.section--highlight {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    color: var(--color-highlight-text);
    padding: 90px 0;
    position: relative;
    overflow: hidden;
}

.section--highlight::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 30%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(168, 85, 247, 0.12) 0%, transparent 50%);
    pointer-events: none;
}

.section__inner {
    display: grid;
    gap: 36px;
}

.section__inner--split {
    grid-template-columns: repeat(12, 1fr);
    align-items: start;
}

.section__content {
    grid-column: span 7;
}

.section__aside {
    grid-column: span 5;
}

.section__title {
    font-size: 2rem;
    margin: 0 0 16px;
}

.section__subtitle {
    margin: 0 0 32px;
    color: var(--color-text-muted);
    max-width: 520px;
}

.section__header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 32px;
}

.section__link {
    font-weight: 600;
    color: var(--color-accent);
}

.section__link:hover,
.section__link:focus-visible {
    text-decoration: underline;
}

.fact-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 12px;
    color: var(--color-text-muted);
}

/* Cards */
.card {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.98) 0%, rgba(255, 255, 255, 0.95) 100%);
    border-radius: var(--radius-md);
    padding: 30px;
    box-shadow: var(--shadow-md);
    border: 1px solid rgba(226, 232, 240, 0.5);
    transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), border-color var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-purple));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-smooth);
}

.card:hover,
.card:focus-within {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
    border-color: rgba(37, 99, 235, 0.2);
}

.card:hover::before {
    transform: scaleX(1);
}

.card__title {
    margin: 0 0 12px;
    font-size: 1.15rem;
}

.card-grid {
    display: grid;
    gap: 24px;
}

.card-grid--posts {
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.tool-card {
    display: flex;
    gap: 18px;
    align-items: flex-start;
}

.tool-card__icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.12), rgba(124, 58, 237, 0.12));
    color: var(--color-accent);
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
    box-shadow: 0 4px 12px -4px rgba(37, 99, 235, 0.2);
    transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

.tool-card:hover .tool-card__icon {
    transform: scale(1.08) rotate(3deg);
    box-shadow: 0 8px 16px -4px rgba(37, 99, 235, 0.3);
}

.tool-card__title {
    margin: 0 0 10px;
    font-size: 1.2rem;
}

.tool-card__description {
    margin: 0 0 18px;
    color: var(--color-text-muted);
}

.blog-card {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.blog-card--wide {
    gap: 16px;
}

.blog-card__meta {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.85rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.blog-card__date {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--color-text-muted);
    margin: 0;
}

.blog-card__title {
    margin: 0;
    font-size: 1.4rem;
    font-weight: 700;
    transition: color var(--transition-smooth);
}

.blog-card__title a {
    background: linear-gradient(135deg, var(--color-text), var(--color-text));
    background-size: 100% 100%;
    background-position: 0 100%;
    background-repeat: no-repeat;
    transition: background-size var(--transition-smooth);
}

.blog-card:hover .blog-card__title a {
    background: linear-gradient(135deg, var(--color-accent), var(--color-purple));
    background-size: 100% 3px;
    background-position: 0 100%;
    background-repeat: no-repeat;
}

.blog-card__excerpt {
    margin: 0;
    color: var(--color-text-muted);
}

.blog-card__cta {
    margin-top: auto;
    color: var(--color-accent);
    font-weight: 600;
}

.blog-card__cta:hover,
.blog-card__cta:focus-visible {
    text-decoration: underline;
}

.empty-state {
    margin: 0;
    color: var(--color-text-muted);
}

/* Page hero */
.page-hero {
    padding: 100px 0 60px;
    background:
        radial-gradient(circle at 30% 20%, rgba(99, 102, 241, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 70% 80%, rgba(168, 85, 247, 0.06) 0%, transparent 50%);
    position: relative;
}

.page-hero--article {
    padding-bottom: 24px;
}

.page-hero__inner {
    display: grid;
    gap: 16px;
}

.page-hero__eyebrow {
    font-size: 0.9rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin: 0;
}

.page-hero__title {
    font-size: clamp(2.2rem, 4vw, 3rem);
    margin: 0;
}

.page-hero__meta {
    margin: 0;
    color: var(--color-text-muted);
}

.page-hero__subtitle {
    margin: 0;
    color: var(--color-text-muted);
    max-width: 680px;
}

.breadcrumb {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    text-decoration: none;
    transition: color var(--transition-fast);
}

.breadcrumb:hover,
.breadcrumb:focus-visible {
    color: var(--color-accent);
}

/* Article body */
.section--article {
    padding-top: 24px;
}

.article-content {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.98) 0%, rgba(255, 255, 255, 0.95) 100%);
    border-radius: var(--radius-lg);
    padding: clamp(40px, 6vw, 72px);
    box-shadow: var(--shadow-xl);
    border: 1px solid rgba(226, 232, 240, 0.5);
}

.article-content h2,
.article-content h3,
.article-content h4 {
    margin-top: 1.6em;
    margin-bottom: 0.6em;
    line-height: 1.25;
}

.article-content p {
    margin-bottom: 1.4em;
    color: var(--color-text-muted);
    font-size: 1.05rem;
    line-height: 1.75;
}

.article-content p:first-of-type {
    font-size: 1.15rem;
    color: var(--color-text);
}

.article-content a {
    color: var(--color-accent);
    text-decoration: underline;
    text-decoration-color: rgba(37, 99, 235, 0.3);
    text-underline-offset: 3px;
    transition: text-decoration-color var(--transition-smooth);
}

.article-content a:hover {
    text-decoration-color: var(--color-accent);
}

.article-content code {
    background-color: rgba(15, 23, 42, 0.06);
    padding: 2px 6px;
    border-radius: var(--radius-xs);
    font-size: 0.9em;
    font-family: 'Monaco', 'Courier New', monospace;
}

.article-content ul,
.article-content ol {
    margin: 1.2em 0 1.6em 1.5em;
}

.article-content blockquote {
    margin: 1.6em 0;
    padding-left: 22px;
    border-left: 3px solid var(--color-accent);
    color: var(--color-text-muted);
    font-style: italic;
}

.article-footer {
    padding-top: 32px;
}

.article-footer__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
    background: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
    color: #ffffff;
    border-radius: var(--radius-lg);
    padding: clamp(36px, 5vw, 56px);
    box-shadow: var(--shadow-glow);
    position: relative;
    overflow: hidden;
}

.article-footer__inner::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 30% 50%, rgba(255, 255, 255, 0.15), transparent 70%);
    pointer-events: none;
}

.article-footer__title {
    margin: 0 0 12px;
}

.article-footer__text {
    margin: 0;
    color: rgba(238, 242, 255, 0.85);
}

/* Callout */
.callout {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}

.callout__title {
    margin: 0 0 14px;
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.callout__text {
    margin: 0;
    color: rgba(248, 250, 252, 0.88);
    max-width: 560px;
    font-size: 1.05rem;
    line-height: 1.7;
}

/* Footer */
.site-footer {
    padding: 64px 0 72px;
    background: linear-gradient(180deg, #0f172a 0%, #020617 100%);
    color: rgba(241, 245, 249, 0.88);
    border-top: 1px solid rgba(71, 85, 105, 0.3);
    position: relative;
}

.site-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.3) 50%, transparent);
}

.footer-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    flex-wrap: wrap;
}

.footer-text {
    margin: 12px 0 0;
    color: rgba(241, 245, 249, 0.7);
    max-width: 360px;
}

.footer-meta {
    text-align: right;
    display: grid;
    gap: 10px;
}

.footer-link {
    color: rgba(191, 219, 254, 0.92);
    font-weight: 500;
}

.footer-link:hover,
.footer-link:focus-visible {
    color: #bfdbfe;
}

/* Responsive */
@media (max-width: 1000px) {
    .hero__inner,
    .section__inner--split {
        grid-template-columns: 1fr;
    }

    .hero__content,
    .hero__aside,
    .section__content,
    .section__aside {
        grid-column: 1 / -1;
    }

    .hero__aside {
        justify-content: flex-start;
    }

    .nav-toggle {
        display: inline-flex;
    }

    .site-nav {
        position: fixed;
        inset: 80px 0 auto;
        transform: translateY(-120%);
        background-color: rgba(248, 250, 252, 0.98);
        padding: 24px;
        box-shadow: 0 30px 60px -40px rgba(15, 23, 42, 0.6);
        transition: transform var(--transition-fast);
    }

    .site-nav[data-open="true"] {
        transform: translateY(0);
    }

    .site-nav__list {
        flex-direction: column;
        align-items: flex-start;
        gap: 18px;
    }

    .page-content {
        padding-top: 96px;
    }
}

@media (max-width: 720px) {
    .hero {
        padding: 96px 0 72px;
    }

    .hero__actions {
        width: 100%;
    }

    .hero__actions .button {
        flex: 1 1 auto;
        justify-content: center;
    }

    .card-grid {
        grid-template-columns: 1fr;
    }

    .article-footer__inner {
        flex-direction: column;
        align-items: flex-start;
        text-align: left;
    }

    .callout {
        flex-direction: column;
        align-items: flex-start;
    }

    .footer-container {
        flex-direction: column;
        align-items: flex-start;
    }

    .footer-meta {
        text-align: left;
    }
}