@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=JetBrains+Mono:wght@400&display=swap');

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

:root {
    --canvas:         #f7f7f4;
    --canvas-soft:    #fafaf7;
    --surface-card:   #ffffff;
    --surface-strong: #e6e5e0;
    --primary:        #f54e00;
    --primary-active: #d04200;
    --on-primary:     #ffffff;
    --ink:            #26251e;
    --body:           #5a5852;
    --body-strong:    #26251e;
    --muted:          #807d72;
    --muted-soft:     #a09c92;
    --hairline:       #e6e5e0;
    --hairline-soft:  #efeee8;
    --hairline-strong:#cfcdc4;
    --semantic-success:#1f8a65;
    --semantic-error: #cf2d56;
    --rounded-xs:  4px;
    --rounded-sm:  6px;
    --rounded-md:  8px;
    --rounded-lg:  12px;
    --rounded-xl:  16px;
    --rounded-pill:9999px;
    --section: 80px;
    --font-sans: 'Inter', system-ui, 'Helvetica Neue', Helvetica, Arial, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

html { font-size: 16px; scroll-behavior: smooth; }
body { background: var(--canvas); color: var(--body); font-family: var(--font-sans); font-size: 16px; line-height: 1.5; }

a { color: var(--ink); text-decoration: none; }
a:hover { color: var(--primary); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

.site-header {
    background: var(--canvas);
    border-bottom: 1px solid var(--hairline);
    height: 64px;
    position: sticky;
    top: 0;
    z-index: 100;
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}
.site-logo {
    font-size: 18px;
    font-weight: 600;
    color: var(--ink);
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    gap: 2px;
}
.logo-grove  { color: var(--ink); }
.logo-amp    { color: var(--primary); margin: 0 2px; }
.logo-window { color: var(--ink); }

.site-nav { position: relative; }
.nav-menu { display: flex; gap: 4px; align-items: center; }
.nav-menu a {
    font-size: 14px;
    font-weight: 500;
    color: var(--muted);
    padding: 6px 10px;
    border-radius: var(--rounded-sm);
    transition: color 0.15s, background 0.15s;
}
.nav-menu a:hover, .nav-menu a[aria-current="page"] {
    color: var(--ink);
    background: var(--surface-strong);
}
.nav-hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}
.nav-hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--ink);
    border-radius: 2px;
    transition: transform 0.2s, opacity 0.2s;
}

.btn-primary {
    background: var(--primary);
    color: var(--on-primary);
    font-size: 14px;
    font-weight: 500;
    padding: 10px 18px;
    height: 40px;
    border-radius: var(--rounded-md);
    border: none;
    cursor: pointer;
    transition: background 0.15s;
    display: inline-flex;
    align-items: center;
}
.btn-primary:hover { background: var(--primary-active); color: var(--on-primary); }

.btn-secondary {
    background: var(--surface-card);
    color: var(--ink);
    font-size: 14px;
    font-weight: 500;
    padding: 10px 18px;
    height: 40px;
    border-radius: var(--rounded-md);
    border: 1px solid var(--hairline-strong);
    cursor: pointer;
    transition: background 0.15s;
    display: inline-flex;
    align-items: center;
}
.btn-secondary:hover { background: var(--surface-strong); }

.hero-band {
    padding: var(--section) 0;
    background: var(--canvas);
}
.hero-band h1 {
    font-size: 72px;
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: -2.16px;
    color: var(--ink);
    max-width: 900px;
}
.hero-sub {
    font-size: 16px;
    color: var(--body);
    margin-top: 20px;
    max-width: 580px;
    line-height: 1.5;
}
.hero-meta {
    margin-top: 12px;
    font-size: 13px;
    color: var(--muted);
}

.section-label {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 16px;
}

.section-title {
    font-size: 36px;
    font-weight: 400;
    letter-spacing: -0.72px;
    color: var(--ink);
    line-height: 1.2;
    margin-bottom: 20px;
}

.section-intro {
    font-size: 16px;
    color: var(--body);
    max-width: 600px;
    margin-bottom: 40px;
}

.articles-section { padding: var(--section) 0; }
.articles-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.article-card {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--rounded-lg);
    overflow: hidden;
    transition: border-color 0.15s;
}
.article-card:hover { border-color: var(--hairline-strong); }
.article-card-img {
    width: 100%;
    height: 220px;
    object-fit: cover;
}
.article-card-body { padding: 24px; }
.article-card-tag {
    display: inline-block;
    background: var(--surface-strong);
    color: var(--ink);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.88px;
    text-transform: uppercase;
    padding: 4px 10px;
    border-radius: var(--rounded-pill);
    margin-bottom: 12px;
}
.article-card h2 {
    font-size: 22px;
    font-weight: 400;
    letter-spacing: -0.11px;
    color: var(--ink);
    line-height: 1.3;
    margin-bottom: 12px;
}
.article-card p {
    font-size: 14px;
    color: var(--body);
    line-height: 1.5;
    margin-bottom: 20px;
}
.article-card-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--primary);
}

.tips-section { padding: var(--section) 0; background: var(--canvas-soft); border-top: 1px solid var(--hairline-soft); border-bottom: 1px solid var(--hairline-soft); }
.tips-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 40px;
}
.tip-card {
    background: var(--surface-card);
    border: 1px solid var(--hairline);
    border-radius: var(--rounded-lg);
    padding: 24px;
}
.tip-card h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 10px;
}
.tip-card p { font-size: 14px; color: var(--body); line-height: 1.5; }

.contact-section { padding: var(--section) 0; }
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}
.contact-info h2 { font-size: 36px; font-weight: 400; letter-spacing: -0.72px; color: var(--ink); margin-bottom: 16px; }
.contact-info p { font-size: 16px; color: var(--body); margin-bottom: 12px; }

.contact-form { background: var(--surface-card); border: 1px solid var(--hairline); border-radius: var(--rounded-lg); padding: 32px; }
.form-group { margin-bottom: 20px; }
.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--ink);
    margin-bottom: 6px;
}
.form-group input,
.form-group textarea {
    width: 100%;
    background: var(--surface-card);
    color: var(--ink);
    border: 1px solid var(--hairline-strong);
    border-radius: var(--rounded-md);
    padding: 12px 16px;
    font-size: 16px;
    font-family: var(--font-sans);
    height: 44px;
    transition: border-color 0.15s;
}
.form-group textarea { height: 120px; resize: vertical; }
.form-group input:focus,
.form-group textarea:focus { outline: none; border-color: var(--primary); }
.form-group input.error,
.form-group textarea.error { border-color: var(--semantic-error); }
.form-error-msg { font-size: 13px; color: var(--semantic-error); margin-top: 4px; display: none; }
.form-error-msg.visible { display: block; }
.form-success {
    display: none;
    background: var(--surface-card);
    border: 1px solid var(--semantic-success);
    border-radius: var(--rounded-md);
    padding: 16px;
    color: var(--semantic-success);
    font-size: 14px;
    margin-top: 16px;
}
.form-success.visible { display: block; }
.btn-submit-wrap { display: flex; align-items: center; gap: 12px; }
.btn-loading { display: none; font-size: 14px; color: var(--muted); }
.btn-loading.visible { display: inline-block; }

.article-page { padding: var(--section) 0; }
.article-page-inner { max-width: 720px; }
.article-breadcrumb {
    font-size: 13px;
    color: var(--muted);
    margin-bottom: 24px;
}
.article-breadcrumb a { color: var(--muted); }
.article-breadcrumb a:hover { color: var(--primary); }
.article-breadcrumb span { margin: 0 6px; }
.article-page h1 {
    font-size: 48px;
    font-weight: 400;
    letter-spacing: -1.2px;
    color: var(--ink);
    line-height: 1.15;
    margin-bottom: 16px;
}
.article-meta {
    font-size: 13px;
    color: var(--muted);
    margin-bottom: 32px;
    display: flex;
    gap: 16px;
}
.article-hero-img {
    width: 100%;
    border-radius: var(--rounded-lg);
    margin-bottom: 40px;
    border: 1px solid var(--hairline);
}
.article-body h2 {
    font-size: 26px;
    font-weight: 400;
    letter-spacing: -0.325px;
    color: var(--ink);
    margin: 40px 0 16px;
}
.article-body h3 {
    font-size: 22px;
    font-weight: 400;
    letter-spacing: -0.11px;
    color: var(--ink);
    margin: 32px 0 12px;
}
.article-body p {
    font-size: 16px;
    color: var(--body);
    line-height: 1.6;
    margin-bottom: 20px;
}
.article-body ul, .article-body ol {
    margin: 0 0 20px 24px;
    font-size: 16px;
    color: var(--body);
    line-height: 1.6;
}
.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }
.article-body li { margin-bottom: 8px; }
.article-body a { color: var(--primary); }
.article-body strong { color: var(--ink); font-weight: 600; }

.article-info-box {
    background: var(--canvas-soft);
    border: 1px solid var(--hairline);
    border-left: 3px solid var(--primary);
    border-radius: var(--rounded-md);
    padding: 20px 24px;
    margin: 32px 0;
    font-size: 14px;
    color: var(--body);
    line-height: 1.6;
}

.article-img-caption {
    font-size: 13px;
    color: var(--muted);
    margin-top: 8px;
    margin-bottom: 32px;
}

.related-articles { padding: var(--section) 0; border-top: 1px solid var(--hairline); }
.related-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-top: 24px; }

.page-content { padding: var(--section) 0; max-width: 800px; }
.page-content h1 { font-size: 48px; font-weight: 400; letter-spacing: -1.2px; color: var(--ink); margin-bottom: 32px; }
.page-content h2 { font-size: 26px; font-weight: 400; color: var(--ink); margin: 40px 0 16px; }
.page-content p { font-size: 16px; color: var(--body); line-height: 1.6; margin-bottom: 16px; }
.page-content ul { margin: 0 0 16px 24px; list-style: disc; font-size: 16px; color: var(--body); line-height: 1.6; }
.page-content li { margin-bottom: 6px; }
.page-content a { color: var(--primary); }
.page-updated { font-size: 13px; color: var(--muted); margin-bottom: 32px; }

.site-footer { padding: 64px 0 48px; background: var(--canvas); border-top: 1px solid var(--hairline); }
.footer-inner {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
}
.footer-brand { font-size: 16px; font-weight: 600; color: var(--ink); margin-bottom: 8px; }
.footer-tagline { font-size: 14px; color: var(--muted); }
.footer-heading { font-size: 11px; font-weight: 600; letter-spacing: 0.88px; text-transform: uppercase; color: var(--muted); margin-bottom: 12px; }
.footer-col ul { display: flex; flex-direction: column; gap: 8px; }
.footer-col a { font-size: 14px; color: var(--body); }
.footer-col a:hover { color: var(--primary); }
.footer-col p { font-size: 14px; color: var(--body); line-height: 1.6; }
.footer-bottom { border-top: 1px solid var(--hairline-soft); margin-top: 48px; padding-top: 24px; }
.footer-bottom p { font-size: 14px; color: var(--muted); }
.footer-disclaimer { font-size: 12px; color: var(--muted-soft); margin-top: 4px; }

.cookie-banner {
    display: none;
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--surface-card);
    border: 1px solid var(--hairline-strong);
    border-radius: var(--rounded-lg);
    box-shadow: none;
    padding: 20px 24px;
    z-index: 9999;
    max-width: 600px;
    width: calc(100% - 48px);
}
.cookie-banner.visible { display: block; }
.cookie-inner p { font-size: 14px; color: var(--body); margin-bottom: 16px; line-height: 1.5; }
.cookie-actions { display: flex; gap: 12px; }

@media (max-width: 1024px) {
    .hero-band h1 { font-size: 56px; letter-spacing: -1.4px; }
    .articles-grid { grid-template-columns: repeat(2, 1fr); }
    .tips-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .nav-hamburger { display: flex; }
    .nav-menu {
        display: none;
        position: absolute;
        top: 48px;
        right: 0;
        background: var(--surface-card);
        border: 1px solid var(--hairline);
        border-radius: var(--rounded-lg);
        flex-direction: column;
        padding: 8px;
        min-width: 200px;
    }
    .nav-menu.open { display: flex; }
    .nav-menu a { display: block; width: 100%; }
    .hero-band h1 { font-size: 36px; letter-spacing: -0.9px; }
    .articles-grid { grid-template-columns: 1fr; }
    .tips-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .related-grid { grid-template-columns: 1fr; }
    .footer-inner { grid-template-columns: 1fr 1fr; }
    .article-page h1 { font-size: 32px; letter-spacing: -0.8px; }
}

@media (max-width: 640px) {
    .footer-inner { grid-template-columns: 1fr; }
    .section-title { font-size: 28px; }
}