/* ==========================================================================
   Patrick Haddock — Portfolio
   Shared design tokens, base styles, and site-wide components.
   See /DESIGN.md for the full design system reference.
   ========================================================================== */

:root {
    --bg-primary: #FAF8F5;
    --bg-secondary: #F4F1EC;
    --bg-card: #FFFFFF;
    --bg-dark: #1a1a1a;
    --text-primary: #2D2A26;
    --text-secondary: #5A5651;
    --text-muted: #6F6B67;
    --text-inverse: #FAF8F5;
    --accent: #C4654A;
    --accent-light: #D88B73;
    --accent-dark: #A85239;
    --sage: #7D8E74;
    --border: #E8E4DE;
    --qantas-red: #E0002A;
    --error: #D64545;
    --error-bg: #FEF2F2;
    --error-border: #FECACA;
    --error-text: #991B1B;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%' height='100%' filter='url(%23noise)'/%3E%3C/svg%3E");
    opacity: 0.025;
    pointer-events: none;
    z-index: 1000;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-100%); }
    to { opacity: 1; transform: translateY(0); }
}

/* Focus indicators */
a:focus {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* Skip link */
.skip-link {
    position: absolute;
    top: 0;
    left: 0;
    transform: translateY(-100%);
    background: var(--accent);
    color: white;
    padding: 0.75rem 1.5rem;
    text-decoration: none;
    font-weight: 600;
    border-radius: 0 0 8px 0;
    z-index: 1000;
    transition: transform 0.3s ease;
}

.skip-link:focus { transform: translateY(0); }

/* ==========================================================================
   Navigation — scoped to .site-nav (not the bare `nav` element) so a page's
   own <nav> landmarks (e.g. case-study prev/next) never inherit this fixed
   header positioning by accident.
   ========================================================================== */

.site-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    padding: 1.5rem 4rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(250, 248, 245, 0.92);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    z-index: 100;
    animation: slideDown 0.8s cubic-bezier(0.4, 0, 0.2, 1) both;
}

.site-nav .logo {
    font-family: 'Crimson Pro', Georgia, serif;
    font-weight: 600;
    font-size: 1.25rem;
    letter-spacing: -0.01em;
    color: var(--text-primary);
    text-decoration: none;
}

.site-nav .nav-links {
    display: flex;
    gap: 2.5rem;
    list-style: none;
}

.site-nav .nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    position: relative;
    transition: color 0.3s ease;
}

.site-nav .nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 1px;
    background: var(--accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.site-nav .nav-links a:hover { color: var(--accent); }
.site-nav .nav-links a:hover::after { transform: scaleX(1); }

.site-nav .nav-links a.active {
    color: var(--accent);
}

.site-nav .nav-links a.active::after {
    transform: scaleX(1);
}

/* ==========================================================================
   Footer — one canonical link set (LinkedIn, Email) and copyright line,
   reused verbatim on every page.
   ========================================================================== */

footer {
    border-top: 1px solid var(--border);
    padding: 3rem 4rem;
    background: var(--bg-card);
}

.footer-inner {
    max-width: 1300px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    position: relative;
    transition: color 0.3s ease;
}

.footer-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 1px;
    background: var(--accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.footer-links a:hover { color: var(--accent); }
.footer-links a:hover::after { transform: scaleX(1); }

.footer-copyright {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.9rem 2rem;
    background: var(--accent);
    color: white;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: 100px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 2px solid var(--accent);
    justify-content: center;
    min-height: 48px;
    min-width: 160px;
}

.cta-button:hover {
    background: var(--accent-dark);
    border-color: var(--accent-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(196, 101, 74, 0.3);
}

.cta-button:focus {
    outline: 2px solid var(--text-primary);
    outline-offset: 2px;
}

.cta-button span {
    transition: transform 0.3s ease;
}

.cta-button:hover span {
    transform: translateX(4px);
}

/* ==========================================================================
   Responsive — stacked masthead nav + footer below 768px
   ========================================================================== */

@media (max-width: 1024px) {
    .site-nav { padding: 1rem 2rem; }
}

@media (max-width: 768px) {
    .site-nav {
        flex-direction: column;
        align-items: center;
        padding: 1.25rem 2rem;
        gap: 0.875rem;
    }

    .site-nav .logo {
        font-size: 1.15rem;
        letter-spacing: 0.015em;
        position: relative;
        padding-bottom: 0.75rem;
    }

    .site-nav .logo::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 50%;
        transform: translateX(-50%);
        width: 32px;
        height: 1px;
        background: linear-gradient(90deg,
            transparent,
            rgba(196, 101, 74, 0.4) 20%,
            rgba(196, 101, 74, 0.4) 80%,
            transparent
        );
    }

    .site-nav .nav-links {
        gap: 1.5rem;
        margin-top: 0.25rem;
    }

    .site-nav .nav-links li a {
        font-size: 0.9rem;
    }

    .footer-inner {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}

/* ==========================================================================
   Accessibility — respect reduced-motion preference sitewide
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}