@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400&family=Sora:wght@300;400;500;600;700;800&display=swap');

:root {
    /* Swiss Aviation Palette */
    --bg-bone: #F7F7F5;
    --text-slate: #1C2331;
    --navy-aviation: #0F172A;
    --red-vermilion: #E63946;
    --gray-muted: #64748B;
    --line-grid: rgba(28, 35, 49, 0.1);
    
    /* Typography */
    --font-heading: 'Sora', sans-serif;
    --font-body: 'IBM Plex Sans', sans-serif;
    
    --transition: all 0.3s ease;
}

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

body {
    background-color: var(--bg-bone);
    color: var(--text-slate);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* Typography Hierarchy */
h1, h2, h3, h4, h5 {
    font-family: var(--font-heading);
    color: var(--navy-aviation);
    line-height: 1.2;
    letter-spacing: -0.01em;
}

h1 { font-size: clamp(2.5rem, 6vw, 4.5rem); font-weight: 700; margin-bottom: 1.5rem; }
h2 { font-size: clamp(2rem, 4vw, 3rem); font-weight: 600; margin-bottom: 2rem; }
h3 { font-size: 1.5rem; font-weight: 600; margin-bottom: 1rem; }

p {
    font-size: 1.125rem;
    color: var(--text-slate);
    margin-bottom: 1.5rem;
    max-width: 720px;
}

/* Layout Utilities */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
}

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

/* Swiss Editorial Elements */
.coordinate-label {
    display: inline-block;
    font-family: var(--font-heading);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--gray-muted);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--red-vermilion);
}

.runway-divider {
    height: 1px;
    width: 100%;
    background-color: var(--line-grid);
    margin: 4rem 0;
    position: relative;
}

.runway-divider::before {
    content: '';
    position: absolute;
    top: -2px;
    left: 0;
    width: 24px;
    height: 5px;
    background-color: var(--red-vermilion);
}

/* Margins & Sections */
section {
    padding: 6rem 0;
    border-bottom: 1px solid var(--line-grid);
}

.margin-note-layout {
    display: grid;
    grid-template-columns: 1fr 3fr;
    gap: 3rem;
    align-items: start;
}

.margin-note {
    font-size: 0.875rem;
    color: var(--gray-muted);
    border-left: 2px solid var(--line-grid);
    padding-left: 1rem;
}

/* Cards & Interaction */
.card {
    background: #FFFFFF;
    border: 1px solid var(--line-grid);
    padding: 2.5rem;
    transition: var(--transition);
    position: relative;
    text-decoration: none;
    display: block;
    color: inherit;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(15, 23, 42, 0.05);
    border-color: var(--red-vermilion);
}

.card-number {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--line-grid);
    font-size: 1.5rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2rem;
    font-family: var(--font-heading);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: 1px solid transparent;
}

.btn-primary {
    background: var(--navy-aviation);
    color: var(--bg-bone);
}

.btn-primary:hover {
    background: var(--text-slate);
}

.btn-secondary {
    background: transparent;
    color: var(--navy-aviation);
    border-color: var(--navy-aviation);
}

.btn-secondary:hover {
    background: var(--navy-aviation);
    color: var(--bg-bone);
}

.btn-danger {
    background: var(--red-vermilion);
    color: white;
}

/* Mobile Settings */
@media (max-width: 768px) {
    .grid-2 { grid-template-columns: 1fr; gap: 2rem; }
    .margin-note-layout { grid-template-columns: 1fr; }
    .margin-note { border-left: none; border-top: 2px solid var(--line-grid); padding-left: 0; padding-top: 1rem; margin-bottom: 2rem; }
    section { padding: 4rem 0; }
}