/* ===================================================================
   Andrew Bourke — Personal Site
   Aesthetic: Editorial warmth meets technical precision
   =================================================================== */

/* --- Custom Properties --- */
:root {
    --color-bg: #f7f5f0;
    --color-bg-warm: #f0ece3;
    --color-surface: #ffffff;
    --color-text: #1a1a18;
    --color-text-secondary: #5c5a52;
    --color-text-tertiary: #6b6860;
    --color-accent: #2d4a3e;
    --color-accent-light: #3d6655;
    --color-accent-subtle: rgba(45, 74, 62, 0.08);
    --color-border: rgba(26, 26, 24, 0.1);
    --color-border-strong: rgba(26, 26, 24, 0.18);

    --font-display: 'DM Serif Display', Georgia, 'Times New Roman', serif;
    --font-body: 'Instrument Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    --space-xs: 0.5rem;
    --space-sm: 0.75rem;
    --space-md: 1.25rem;
    --space-lg: 2rem;
    --space-xl: 3.5rem;
    --space-2xl: 6rem;
    --space-3xl: 9rem;

    --max-width: 72rem;
    --content-width: 42rem;
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-body);
    font-weight: 400;
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    position: relative;
}

::selection {
    background: var(--color-accent);
    color: #fff;
}

img { max-width: 100%; display: block; }
a { color: inherit; }

/* --- Grain Overlay --- */
.grain-overlay {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 9999;
    opacity: 0.025;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: 256px 256px;
}

/* --- Header --- */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(247, 245, 240, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--color-border);
}

.header-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    height: 3.75rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-family: var(--font-display);
    font-size: 1.25rem;
    letter-spacing: -0.02em;
    text-decoration: none;
    color: var(--color-accent);
    transition: opacity var(--transition-base);
}

.logo:hover {
    opacity: 0.7;
}

.header-nav {
    display: flex;
    gap: var(--space-md);
}

.nav-link {
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    color: var(--color-text-secondary);
    letter-spacing: 0.01em;
    padding: var(--space-xs) 0;
    position: relative;
    transition: color var(--transition-base);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1.5px;
    background: var(--color-accent);
    transition: width var(--transition-base);
}

.nav-link:hover {
    color: var(--color-accent);
}

.nav-link:hover::after {
    width: 100%;
}

/* --- Hero --- */
.hero {
    padding: calc(3.75rem + var(--space-3xl)) var(--space-lg) var(--space-xl);
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 60vh;
    background: linear-gradient(180deg, var(--color-bg-warm) 0%, var(--color-bg) 100%);
    z-index: -1;
}

.hero-inner {
    max-width: var(--max-width);
    margin: 0 auto;
}

.hero-label {
    font-size: 0.8125rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--space-lg);
    opacity: 0;
    transform: translateY(12px);
    animation: fadeInUp 0.7s cubic-bezier(0.16, 1, 0.3, 1) 0.1s forwards;
}

.hero-name {
    display: block;
    font-family: var(--font-display);
    font-size: clamp(2.75rem, 6vw, 4.5rem);
    line-height: 1.1;
    letter-spacing: -0.025em;
    color: var(--color-text);
    margin-bottom: var(--space-md);
    opacity: 0;
    transform: translateY(16px);
    animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.2s forwards;
}

.hero-tagline {
    display: block;
    font-family: var(--font-body);
    font-size: clamp(1.125rem, 2.2vw, 1.375rem);
    font-weight: 400;
    line-height: 1.6;
    color: var(--color-text-secondary);
    max-width: 38rem;
    opacity: 0;
    transform: translateY(16px);
    animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.35s forwards;
}

.hero-meta {
    margin-top: var(--space-xl);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-sm);
    opacity: 0;
    transform: translateY(12px);
    animation: fadeInUp 0.7s cubic-bezier(0.16, 1, 0.3, 1) 0.5s forwards;
}

.meta-item {
    font-size: 0.875rem;
    color: var(--color-text-tertiary);
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.meta-item svg {
    flex-shrink: 0;
    color: var(--color-accent);
}

.meta-divider {
    color: var(--color-border-strong);
    user-select: none;
}

/* --- Section Heading --- */
.section-heading {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 400;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-accent);
    padding-bottom: var(--space-sm);
    border-bottom: 1.5px solid var(--color-accent);
    display: inline-block;
    margin-bottom: var(--space-xl);
}

/* --- About --- */
.about {
    padding: var(--space-xl) var(--space-lg) var(--space-2xl);
}

.about-inner {
    max-width: var(--max-width);
    margin: 0 auto;
}

.about-content {
    max-width: var(--content-width);
}

.about-lead {
    font-size: 1.1875rem;
    line-height: 1.7;
    color: var(--color-text);
    margin-bottom: var(--space-md);
}

.about-content p {
    color: var(--color-text-secondary);
    line-height: 1.8;
}

.about-content p + p {
    margin-top: var(--space-md);
}

/* --- Expertise --- */
.expertise {
    padding: var(--space-2xl) var(--space-lg);
    background: var(--color-bg-warm);
}

.expertise-inner {
    max-width: var(--max-width);
    margin: 0 auto;
}

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.expertise-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: var(--space-xl) var(--space-lg);
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.expertise-card:hover {
    border-color: var(--color-border-strong);
    box-shadow: 0 4px 24px rgba(26, 26, 24, 0.06);
}

.card-icon {
    width: 2.75rem;
    height: 2.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent-subtle);
    border-radius: 8px;
    color: var(--color-accent);
    margin-bottom: var(--space-md);
}

.expertise-card h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 400;
    letter-spacing: -0.01em;
    margin-bottom: var(--space-sm);
}

.expertise-card p {
    font-size: 0.9375rem;
    line-height: 1.7;
    color: var(--color-text-secondary);
}

/* --- Connect --- */
.connect {
    padding: var(--space-2xl) var(--space-lg);
}

.connect-inner {
    max-width: var(--max-width);
    margin: 0 auto;
}

.connect-content {
    max-width: var(--content-width);
}

.connect-content p {
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: var(--space-lg);
}

.connect-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.connect-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9375rem;
    font-weight: 500;
    text-decoration: none;
    color: var(--color-text-secondary);
    padding: 0.75rem 1.25rem;
    border: 1px solid var(--color-border-strong);
    border-radius: 6px;
    transition: all var(--transition-base);
}

.connect-link:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
    background: var(--color-accent-subtle);
}

.connect-link--primary {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: #fff;
}

.connect-link--primary:hover {
    background: var(--color-accent-light);
    border-color: var(--color-accent-light);
    color: #fff;
}

/* --- Footer --- */
.site-footer {
    padding: var(--space-xl) var(--space-lg);
    border-top: 1px solid var(--color-border);
}

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

.footer-copyright,
.footer-location {
    font-size: 0.8125rem;
    color: var(--color-text-tertiary);
}

/* --- Contact Page --- */
.contact-page {
    padding: calc(3.75rem + var(--space-3xl)) var(--space-xl) var(--space-2xl);
}

.contact-page-inner {
    max-width: 36rem;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.contact-heading {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4.5vw, 3rem);
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-sm);
}

.contact-lead {
    font-size: 1.1875rem;
    color: var(--color-text);
    line-height: 1.7;
    margin-bottom: var(--space-xl);
}

/* --- Form --- */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.form-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text);
    letter-spacing: 0.01em;
}

.form-optional {
    font-weight: 400;
    color: var(--color-text-tertiary);
}

.form-input {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.5;
    color: var(--color-text);
    background: var(--color-surface);
    border: 1px solid var(--color-border-strong);
    border-radius: 6px;
    padding: 0.6875rem 0.875rem;
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
    outline: none;
}

.form-input::placeholder {
    color: var(--color-text-tertiary);
}

.form-input:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-subtle);
}

.form-input--error {
    border-color: #b44040;
    box-shadow: 0 0 0 3px rgba(180, 64, 64, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 8rem;
}

/* Honeypot — visually hidden, still in DOM for bots */
.form-hp {
    position: absolute;
    left: -9999px;
    top: -9999px;
    width: 1px;
    height: 1px;
    overflow: hidden;
    opacity: 0;
}

.form-actions {
    padding-top: var(--space-xs);
}

.form-submit {
    font-family: var(--font-body);
    font-size: 0.9375rem;
    font-weight: 600;
    color: #fff;
    background: var(--color-accent);
    border: 1px solid var(--color-accent);
    border-radius: 6px;
    padding: 0.75rem 2rem;
    cursor: pointer;
    transition: background var(--transition-base), border-color var(--transition-base);
    letter-spacing: 0.01em;
}

.form-submit:hover {
    background: var(--color-accent-light);
    border-color: var(--color-accent-light);
}

.form-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Result messages */
.form-result[hidden] {
    display: none !important;
}

.form-result {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    padding: var(--space-md);
    border-radius: 6px;
    margin-top: var(--space-md);
    line-height: 1.6;
}

.form-result strong {
    display: block;
    margin-bottom: 0.25rem;
}

.form-result p {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    margin: 0;
}

.form-result a {
    color: var(--color-accent);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.form-result--success {
    background: rgba(45, 74, 62, 0.06);
    border: 1px solid rgba(45, 74, 62, 0.2);
    color: var(--color-accent);
}

.form-result--error {
    background: rgba(180, 64, 64, 0.06);
    border: 1px solid rgba(180, 64, 64, 0.2);
    color: #8b3030;
}

.contact-alt {
    margin-top: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
    font-size: 0.9375rem;
    color: var(--color-text-tertiary);
}

.contact-alt a {
    color: var(--color-accent);
    text-decoration: underline;
    text-underline-offset: 2px;
    transition: color var(--transition-base);
}

.contact-alt a:hover {
    color: var(--color-accent-light);
}

/* --- Animations --- */
@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* --- Responsive --- */
@media (max-width: 64rem) {
    .expertise-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 48rem) {
    :root {
        --space-2xl: 4rem;
        --space-3xl: 6rem;
    }

    .expertise-grid {
        grid-template-columns: 1fr;
    }

    .hero-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-xs);
    }

    .meta-divider {
        display: none;
    }

    .footer-inner {
        flex-direction: column;
        gap: var(--space-xs);
        text-align: center;
    }
}

@media (max-width: 30rem) {
    .header-inner {
        padding: 0 var(--space-md);
    }

    .hero,
    .about,
    .expertise,
    .connect {
        padding-left: var(--space-md);
        padding-right: var(--space-md);
    }

    .site-footer {
        padding-left: var(--space-md);
        padding-right: var(--space-md);
    }

    .connect-links {
        flex-direction: column;
    }

    .connect-link {
        justify-content: center;
    }
}

/* --- Print --- */
@media print {
    .grain-overlay,
    .site-header {
        display: none;
    }

    body {
        background: #fff;
        color: #000;
    }

    .hero {
        padding-top: 2rem;
    }

    a[href]::after {
        content: ' (' attr(href) ')';
        font-size: 0.75em;
        color: #666;
    }
}