/* Swiss Grid Flat Style & Vertical Sidebar Layout */
@import url('https://fonts.googleapis.com/css2?family=Helvetica+Neue:wght@400;700&family=Work+Sans:wght@300;400;600;800&display=swap');

:root {
    --swiss-red: #DA291C;
    --swiss-black: #111111;
    --swiss-white: #FFFFFF;
    --swiss-gray: #F5F5F5;
    --swiss-line: #E0E0E0;
    --font-main: 'Helvetica Neue', 'Work Sans', Helvetica, Arial, sans-serif;
    --sidebar-width: 300px;
}

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

body {
    background-color: var(--swiss-white);
    color: var(--swiss-black);
    font-family: var(--font-main);
    line-height: 1.4;
    overflow-x: hidden;
    display: flex;
}

/* Typography - Strict Left Alignment */
h1, h2, h3, h4, p {
    text-align: left;
}
h1 { font-size: 5rem; font-weight: 800; letter-spacing: -0.03em; line-height: 1; margin-bottom: 20px; }
h2 { font-size: 3.5rem; font-weight: 800; letter-spacing: -0.02em; margin-bottom: 30px; }
h3 { font-size: 2rem; font-weight: 700; margin-bottom: 15px; }
p { font-size: 1.2rem; font-weight: 400; color: #555; margin-bottom: 20px; }
a { text-decoration: none; color: inherit; transition: color 0.2s; }
img { max-width: 100%; height: auto; display: block; }

/* Buttons - Flat & Sharp */
.btn-swiss {
    display: inline-block;
    padding: 15px 30px;
    font-size: 1rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    background: var(--swiss-black);
    color: var(--swiss-white);
    border: none;
    cursor: pointer;
    transition: background 0.2s;
}
.btn-swiss:hover { background: var(--swiss-red); color: var(--swiss-white); }
.btn-swiss.outline {
    background: transparent;
    color: var(--swiss-black);
    border: 2px solid var(--swiss-black);
}
.btn-swiss.outline:hover {
    background: var(--swiss-black);
    color: var(--swiss-white);
}

/* 1. Vertical Sidebar Navigation */
.swiss-sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    background: var(--swiss-gray);
    border-right: 1px solid var(--swiss-line);
    padding: 40px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    z-index: 100;
}
.brand-logo {
    font-size: 2rem;
    font-weight: 800;
    color: var(--swiss-red);
    letter-spacing: -1px;
}
.nav-menu {
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.nav-menu a {
    font-size: 1.2rem;
    font-weight: 600;
    color: #777;
    position: relative;
    padding-left: 0;
    transition: all 0.2s;
}
.nav-menu a:hover, .nav-menu a.active {
    color: var(--swiss-black);
    padding-left: 15px;
}
.nav-menu a.active::before {
    content: '';
    position: absolute;
    left: 0; top: 50%; transform: translateY(-50%);
    width: 8px; height: 8px;
    background: var(--swiss-red);
}
.sidebar-bottom {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* 2. Main Content Area & Background Grid */
.main-content {
    margin-left: var(--sidebar-width);
    width: calc(100% - var(--sidebar-width));
    min-height: 100vh;
    /* Visible Grid Background */
    background-image: 
        linear-gradient(to right, var(--swiss-line) 1px, transparent 1px),
        linear-gradient(to bottom, var(--swiss-line) 1px, transparent 1px);
    background-size: 10% 200px; /* 10 columns */
    background-position: top left;
}

/* Common Section Layout */
.swiss-section {
    padding: 100px 5%;
    border-bottom: 1px solid var(--swiss-line);
    background: rgba(255,255,255,0.8); /* Slight transparency to show grid */
}

/* 3. Hero Section (Asymmetric) */
.hero-grid {
    display: grid;
    grid-template-columns: 6fr 4fr;
    gap: 5%;
    align-items: center;
}
.hero-text { padding-right: 20px; }
.hero-actions { display: flex; gap: 20px; margin-top: 40px; margin-bottom: 40px; }
.trust-marks { display: flex; gap: 30px; font-weight: 600; font-size: 0.9rem; color: #777; border-top: 1px solid var(--swiss-line); padding-top: 20px; }
.trust-marks span { display: flex; align-items: center; gap: 5px; }
.trust-marks span::before { content: '■'; color: var(--swiss-red); font-size: 0.6rem; }
.hero-img { background: var(--swiss-gray); padding: 20px; border: 1px solid var(--swiss-line); }
.hero-img img { filter: contrast(1.2) grayscale(20%); }

/* 4. Metrics (Strict Grid) */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px; /* Borders via background */
    background: var(--swiss-line);
    border: 1px solid var(--swiss-line);
    margin: 0 5%;
}
.metric-item {
    background: var(--swiss-white);
    padding: 40px;
}
.metric-val { font-size: 4rem; font-weight: 800; color: var(--swiss-red); line-height: 1; margin-bottom: 10px; }
.metric-lbl { font-size: 1rem; font-weight: 700; text-transform: uppercase; color: #777; }

/* 5. Features (Alternating Blocks) */
.feature-block {
    display: grid;
    grid-template-columns: 5fr 5fr;
    gap: 5%;
    margin-bottom: 80px;
    align-items: center;
}
.feature-block:last-child { margin-bottom: 0; }
.feature-block:nth-child(even) .feat-text { order: 2; }
.feature-block:nth-child(even) .feat-img { order: 1; }
.feat-num { font-size: 2rem; font-weight: 800; color: var(--swiss-red); margin-bottom: 10px; }
.feat-img { border: 1px solid var(--swiss-line); padding: 10px; background: var(--swiss-white); }

/* 6. Nodes (Typographic Table) */
.nodes-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 40px;
}
.nodes-table th, .nodes-table td {
    padding: 20px 0;
    border-bottom: 1px solid var(--swiss-line);
    text-align: left;
}
.nodes-table th { font-size: 1rem; color: #777; text-transform: uppercase; font-weight: 600; }
.nodes-table td { font-size: 1.5rem; font-weight: 700; }
.nodes-table td.ping { color: var(--swiss-red); font-weight: 800; text-align: right; }

/* 7. Reviews (Minimal Cards) */
.reviews-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}
.review-card {
    background: var(--swiss-gray);
    padding: 40px;
    border: 1px solid var(--swiss-line);
}
.rev-stars { color: var(--swiss-red); font-size: 1.5rem; margin-bottom: 20px; letter-spacing: 2px; }
.rev-text { font-size: 1.1rem; font-style: italic; margin-bottom: 30px; }
.rev-user { font-weight: 700; text-transform: uppercase; font-size: 0.9rem; }

/* 8. Pricing (Columns) */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}
.price-col {
    border: 1px solid var(--swiss-line);
    padding: 50px 40px;
    background: var(--swiss-white);
    display: flex;
    flex-direction: column;
}
.price-col.recommended {
    border: 4px solid var(--swiss-black);
    transform: translateY(-10px);
    box-shadow: 10px 10px 0 var(--swiss-line);
}
.p-name { font-size: 1.5rem; font-weight: 800; margin-bottom: 10px; text-transform: uppercase; }
.p-val { font-size: 4rem; font-weight: 800; line-height: 1; margin-bottom: 30px; }
.p-val span { font-size: 1.2rem; color: #777; font-weight: 400; }
.p-list { list-style: none; margin-bottom: 40px; flex: 1; }
.p-list li { padding: 15px 0; border-top: 1px solid var(--swiss-line); font-weight: 600; }
.p-list li::before { content: '+'; color: var(--swiss-red); margin-right: 10px; font-weight: 800; }

/* 9. FAQ & Footer */
.faq-list {
    margin-top: 40px;
    max-width: 800px;
}
.faq-item {
    margin-bottom: 30px;
}
.faq-q { font-size: 1.5rem; font-weight: 700; margin-bottom: 10px; }
.faq-a { color: #555; }

.swiss-footer {
    padding: 60px 5%;
    background: var(--swiss-black);
    color: var(--swiss-white);
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
}
.f-brand { font-size: 2rem; font-weight: 800; color: var(--swiss-red); margin-bottom: 20px; }
.f-links { display: flex; gap: 30px; }
.f-links a { color: #aaa; font-weight: 600; text-transform: uppercase; font-size: 0.9rem; }
.f-links a:hover { color: var(--swiss-white); }
.f-copy { color: #777; font-size: 0.8rem; margin-top: 20px; }

/* Subpages */
.sub-header {
    padding: 100px 5%;
    background: var(--swiss-gray);
    border-bottom: 1px solid var(--swiss-line);
}
.sub-header h1 { font-size: 4rem; margin-bottom: 10px; }
.sub-header p { font-size: 1.5rem; color: #555; }

.dl-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    padding: 100px 5%;
}
.dl-card {
    border: 1px solid var(--swiss-line);
    padding: 50px;
    display: flex;
    align-items: center;
    gap: 40px;
    background: var(--swiss-white);
}
.dl-icon { font-size: 4rem; }
.dl-info h3 { font-size: 2rem; margin-bottom: 10px; }
.dl-info p { color: #777; margin-bottom: 20px; }

.help-layout {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 50px;
    padding: 100px 5%;
}
.help-nav {
    display: flex;
    flex-direction: column;
    gap: 15px;
    position: sticky;
    top: 40px;
}
.help-nav a { font-size: 1.2rem; font-weight: 700; color: #777; padding-left: 15px; border-left: 2px solid var(--swiss-line); }
.help-nav a.active, .help-nav a:hover { color: var(--swiss-black); border-color: var(--swiss-red); }
.help-sec { margin-bottom: 80px; }
.help-sec h2 { font-size: 2.5rem; margin-bottom: 30px; border-bottom: 4px solid var(--swiss-black); padding-bottom: 10px; display: inline-block; }
.help-sec h3 { font-size: 1.5rem; margin-top: 40px; margin-bottom: 15px; }
.help-sec p, .help-sec li { font-size: 1.1rem; color: #555; margin-bottom: 15px; }
.help-sec ul { padding-left: 20px; }

/* Responsive */
@media (max-width: 1200px) {
    .hero-grid, .feature-block { grid-template-columns: 1fr; }
    .feature-block:nth-child(even) .feat-text { order: 1; }
    .feature-block:nth-child(even) .feat-img { order: 2; }
    .metrics-grid { grid-template-columns: 1fr 1fr; }
    .reviews-grid, .pricing-grid { grid-template-columns: 1fr; }
    .price-col.recommended { transform: none; box-shadow: none; }
}
@media (max-width: 900px) {
    body { flex-direction: column; }
    .swiss-sidebar { width: 100%; height: auto; position: static; border-right: none; border-bottom: 1px solid var(--swiss-line); padding: 20px; flex-direction: row; align-items: center; }
    .nav-menu { display: none; } /* Hide on mobile for simplicity */
    .sidebar-bottom { flex-direction: row; align-items: center; }
    .main-content { margin-left: 0; width: 100%; background-size: 20% 100px; }
    h1 { font-size: 3.5rem; }
    .dl-grid { grid-template-columns: 1fr; }
    .help-layout { grid-template-columns: 1fr; }
    .help-nav { position: static; flex-direction: row; flex-wrap: wrap; border-left: none; border-bottom: 1px solid var(--swiss-line); padding-bottom: 20px; }
    .help-nav a { border-left: none; border-bottom: 2px solid transparent; padding: 10px; }
    .help-nav a.active { border-color: var(--swiss-red); }
    .swiss-footer { flex-direction: column; align-items: flex-start; gap: 30px; }
}