/* ============================================
   GLOBAL STYLES - Stan Website
   Variables, Reset, Typography, Utilities
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
    /* Colors - Heavy duty, professional palette */
    --color-primary: #D97706;       /* Amber/construction orange */
    --color-primary-dark: #B45309;
    --color-primary-light: #F59E0B;
    --color-secondary: #1E293B;     /* Dark slate */
    --color-secondary-light: #334155;
    --color-accent: #F97316;        /* Orange accent */

    --color-bg: #FFFFFF;
    --color-bg-alt: #F8FAFC;
    --color-bg-dark: #0F172A;
    --color-bg-dark-alt: #1E293B;

    --color-text: #1E293B;
    --color-text-light: #64748B;
    --color-text-white: #F8FAFC;
    --color-text-muted: #94A3B8;

    --color-border: #E2E8F0;
    --color-border-light: #F1F5F9;

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;
    --font-size-7xl: 4.5rem;

    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;
    --font-weight-black: 900;

    --line-height-tight: 1.1;
    --line-height-snug: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.625;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    --space-5xl: 8rem;

    /* Layout */
    --container-max: 1200px;
    --container-padding: 1.5rem;

    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;

    /* Z-index layers */
    --z-nav: 1000;
    --z-overlay: 900;
    --z-modal: 1100;
}

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

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

body {
    overflow-x: hidden;
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-regular);
    line-height: var(--line-height-normal);
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

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

ul, ol {
    list-style: none;
}

button, input, textarea, select {
    font: inherit;
    color: inherit;
    border: none;
    outline: none;
    background: none;
}

button {
    cursor: pointer;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    color: var(--color-text);
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }

@media (max-width: 768px) {
    h1 { font-size: var(--font-size-4xl); }
    h2 { font-size: var(--font-size-3xl); }
    h3 { font-size: var(--font-size-xl); }
}

/* --- Layout --- */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* --- Section Header --- */
.section-header {
    text-align: center;
    margin-bottom: var(--space-4xl);
    max-width: 640px;
    margin-left: auto;
    margin-right: auto;
}

.section-header__tag {
    display: inline-block;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-md);
}

.section-header__title {
    margin-bottom: var(--space-lg);
}

.section-header__desc {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
    line-height: var(--line-height-relaxed);
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 2rem;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    cursor: pointer;
    gap: var(--space-sm);
}

.btn--primary {
    background-color: var(--color-primary);
    color: var(--color-text-white);
}

.btn--primary:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.btn--outline {
    border: 2px solid var(--color-text-white);
    color: var(--color-text-white);
    background: transparent;
}

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

.btn--full {
    width: 100%;
}

/* --- Utility --- */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* --- Footer --- */
.footer {
    background-color: var(--color-bg-dark);
    color: var(--color-text-white);
    padding: var(--space-3xl) 0 var(--space-xl);
}

.footer__content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: var(--space-xl);
    border-bottom: 1px solid var(--color-bg-dark-alt);
    margin-bottom: var(--space-xl);
}

.footer__logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.footer__tagline {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    margin-top: var(--space-sm);
}

.footer__legal {
    color: var(--color-text-muted);
    font-size: var(--font-size-xs);
    margin-top: var(--space-xs);
    opacity: 0.7;
}

.footer__links {
    display: flex;
    gap: var(--space-xl);
}

.footer__links a {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

.footer__links a:hover {
    color: var(--color-primary);
}

.footer__bottom {
    text-align: center;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

@media (max-width: 768px) {
    .footer__content {
        flex-direction: column;
        text-align: center;
        gap: var(--space-xl);
    }

    .footer__links {
        flex-wrap: wrap;
        justify-content: center;
    }
}