/* ============================================
   JUPITER PLANET XXL — Design 10
   base.css — Reset & Swiss Typography
   ============================================ */

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography — Swiss / International Style */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--color-heading);
    line-height: 1.05;
    letter-spacing: -0.03em;
}

h1 {
    font-size: clamp(3rem, 8vw, 7rem);
}

h2 {
    font-size: clamp(2rem, 4vw, 3.5rem);
    margin-bottom: var(--space-md);
}

h3 {
    font-size: clamp(1.25rem, 2vw, 1.5rem);
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

p {
    margin-bottom: var(--space-sm);
    max-width: 60ch;
}

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

ul, ol {
    list-style: none;
}

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* Container */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.container--narrow {
    max-width: var(--container-narrow);
}

/* Utility: Thin HR */
hr {
    border: none;
    border-top: var(--border);
    margin: var(--space-xl) 0;
}

/* Section spacing */
section {
    padding: var(--space-2xl) 0;
}

/* Section label (small uppercase) */
.section-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-gray);
    margin-bottom: var(--space-lg);
    display: block;
}

/* Button base */
.btn {
    display: inline-block;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: 16px 40px;
    border-radius: 0;
    transition: background-color var(--transition), color var(--transition);
    cursor: pointer;
    text-align: center;
}

.btn--red {
    background-color: var(--color-red);
    color: var(--color-white);
    border: none;
}

.btn--red:hover {
    background-color: #cc0000;
}

.btn--outline {
    background-color: transparent;
    color: var(--color-black);
    border: var(--border-dark);
}

.btn--outline:hover {
    background-color: var(--color-black);
    color: var(--color-white);
}

.btn--white {
    background-color: var(--color-white);
    color: var(--color-black);
    border: none;
}

.btn--white:hover {
    background-color: var(--color-gray-light);
}

/* Monospace numbers */
.mono {
    font-family: var(--font-mono);
    font-variant-numeric: tabular-nums;
}

/* Thin text */
.thin {
    font-weight: 300;
}

/* Fade-in animation */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Selection */
::selection {
    background-color: var(--color-black);
    color: var(--color-white);
}

/* Responsive */
@media (max-width: 768px) {
    section {
        padding: var(--space-xl) 0;
    }

    .container {
        padding: 0 var(--space-sm);
    }
}