/* ============================================
   BASE STYLES
   Resets, typography, body styles, textures
   ============================================ */

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

/* ============================================
   BODY & TEXTURES
   ============================================ */
body {
    font-family: var(--font-body);
    font-size: var(--text-base);
    line-height: var(--leading-relaxed);
    color: var(--color-charcoal);
    background-color: var(--color-cream);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* Paper texture overlay */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(0,0,0,.02) 2px, rgba(0,0,0,.02) 4px),
        repeating-linear-gradient(90deg, transparent, transparent 2px, rgba(0,0,0,.02) 2px, rgba(0,0,0,.02) 4px);
    pointer-events: none;
    opacity: 0.4;
    z-index: 1;
}

/* Grain texture */
body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
    opacity: 0.025;
    pointer-events: none;
    z-index: 1;
}

/* Content above textures */
.page-content {
    position: relative;
    z-index: 2;
}

/* ============================================
   TYPOGRAPHY CLASSES
   ============================================ */

/* Display Text (Headlines) */
.display {
    font-family: var(--font-display);
    font-weight: var(--weight-black);
    line-height: var(--leading-tight);
    letter-spacing: -0.03em;
    color: var(--color-charcoal);
}

.display-lg {
    font-size: var(--text-3xl);
}

.display-md {
    font-size: var(--text-2xl);
}

.display-sm {
    font-size: var(--text-xl);
}

/* Body Text */
.body-lg {
    font-size: var(--text-lg);
    line-height: var(--leading-normal);
    color: var(--color-mid-gray);
}

.body-base {
    font-size: var(--text-base);
    line-height: var(--leading-relaxed);
    color: var(--color-mid-gray);
}

.body-sm {
    font-size: var(--text-sm);
    line-height: var(--leading-normal);
    color: var(--color-mid-gray);
}

/* Label Text (Uppercase, monospace) */
.label {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: var(--weight-semibold);
    color: var(--color-safety-orange);
}

.label-lg {
    font-size: var(--text-sm);
}

/* ============================================
   LAYOUT
   ============================================ */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--space-lg);
    }
}

.container-narrow {
    max-width: 800px;
}

.container-wide {
    max-width: 1400px;
}

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

@media (min-width: 768px) {
    section {
        padding: var(--space-2xl) 0;
    }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

/* Text Colors */
.text-charcoal { color: var(--color-charcoal); }
.text-gray { color: var(--color-mid-gray); }
.text-amber { color: var(--color-safety-amber); }
.text-orange { color: var(--color-safety-orange); }

/* Background Colors */
.bg-cream { background-color: var(--color-cream); }
.bg-white { background-color: var(--color-warm-white); }
.bg-charcoal { background-color: var(--color-charcoal); }
.bg-warm-black { background-color: var(--color-warm-black); }

/* Spacing Utilities */
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }

/* ============================================
   MOBILE OPTIMIZATIONS
   ============================================ */
@media (max-width: 767px) {
    /* Reduce display text sizes on mobile */
    .display-lg {
        font-size: 42px;
        line-height: 1.15;
    }

    .display-md {
        font-size: 32px;
        line-height: 1.2;
    }

    .display-sm {
        font-size: 24px;
    }

    /* Body text adjustments */
    .body-lg {
        font-size: var(--text-base);
    }

    /* Container tighter padding on mobile */
    .container {
        padding: 0 var(--space-sm);
    }
}