/* ============================================
   DESIGN SYSTEM — CSS Custom Properties
   ============================================
   All colours, fonts, and spacing are defined here.
   Change these values to retheme the entire site.
   ============================================ */

:root {
    /* --- Colour palette ---
       Restrained and warm. The project photos provide the colour;
       the site itself stays neutral and lets them breathe. */
    --color-bg:          #faf9f7;    /* warm off-white background */
    --color-bg-alt:      #f0eeeb;    /* slightly darker for contrast sections */
    --color-text:        #2c2c2c;    /* near-black, softer than pure #000 */
    --color-text-muted:  #6b6560;    /* de-emphasised text (dates, captions) */
    --color-accent:      #8b7355;    /* warm brown — used sparingly */
    --color-border:      #ddd8d0;    /* subtle dividers */
    --color-white:       #ffffff;

    /* --- Typography ---
       Serif for headings (DM Serif Display — has warmth and character).
       Newsreader for body text (a literary serif that suits a craft portfolio).
       Inter for UI elements (nav, buttons, labels). */
    --font-heading: 'DM Serif Display', Georgia, serif;
    --font-body:    'Newsreader', Georgia, serif;
    --font-ui:      'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* --- Font sizes (fluid where it matters) --- */
    --text-xs:   0.75rem;   /* 12px */
    --text-sm:   0.875rem;  /* 14px */
    --text-base: 1rem;      /* 16px */
    --text-lg:   1.125rem;  /* 18px */
    --text-xl:   1.5rem;    /* 24px */
    --text-2xl:  2rem;      /* 32px */
    --text-3xl:  2.75rem;   /* 44px */
    --text-hero: clamp(2.5rem, 5vw, 4rem);  /* responsive hero text */

    /* --- Spacing scale --- */
    --space-xs:  0.5rem;    /* 8px */
    --space-sm:  1rem;      /* 16px */
    --space-md:  1.5rem;    /* 24px */
    --space-lg:  3rem;      /* 48px */
    --space-xl:  5rem;      /* 80px */
    --space-2xl: 8rem;      /* 128px */

    /* --- Layout --- */
    --max-width:      1200px;
    --max-width-text: 680px;   /* for readable text blocks */

    /* --- Transitions --- */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
}


/* ============================================
   RESET & BASE
   ============================================ */

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
}

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

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

a:hover {
    color: var(--color-accent);
}


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

h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 400;   /* DM Serif Display only has regular weight */
    line-height: 1.2;
}

h1 { font-size: var(--text-hero); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }

p {
    max-width: var(--max-width-text);
}

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


/* ============================================
   LAYOUT UTILITIES
   ============================================ */

.container {
    width: 100%;
    max-width: var(--max-width);
    margin-inline: auto;
    padding-inline: var(--space-md);
}

.section {
    padding-block: var(--space-xl);
}


/* ============================================
   PROJECT GRID
   ============================================
   Used on the Projects page and for featured
   projects on the Home page. */

.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--space-md);
}

.project-card {
    position: relative;
    overflow: hidden;
    border-radius: 4px;
    background: var(--color-white);
    transition: transform var(--transition-base);
}

.project-card:hover {
    transform: translateY(-2px);
}

.project-card img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
}

.project-card-body {
    padding: var(--space-sm) var(--space-sm) var(--space-md);
}

.project-card-body h3 {
    font-size: var(--text-lg);
    margin-bottom: var(--space-xs);
}

.project-card-body .text-muted {
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}


/* ============================================
   TAG FILTERS
   ============================================ */

.tag-filters {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    margin-bottom: var(--space-lg);
}

.tag-filters button {
    font-family: var(--font-body);
    font-size: var(--text-sm);
    padding: 0.4em 1em;
    border: 1px solid var(--color-border);
    border-radius: 2px;
    background: transparent;
    color: var(--color-text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.tag-filters button:hover,
.tag-filters button.active {
    background: var(--color-text);
    color: var(--color-bg);
    border-color: var(--color-text);
}


/* ============================================
   SITE HEADER (<site-header> component)
   ============================================ */

.site-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md);
    max-width: var(--max-width);
    margin-inline: auto;
}

.site-nav .wordmark {
    font-family: var(--font-heading);
    font-size: var(--text-lg);
    letter-spacing: -0.01em;
}

.site-nav ul {
    display: flex;
    list-style: none;
    gap: var(--space-md);
}

.site-nav a {
    font-family: var(--font-ui);
    font-size: var(--text-sm);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-muted);
}

.site-nav a:hover,
.site-nav a.active {
    color: var(--color-text);
}


/* ============================================
   SITE FOOTER (<site-footer> component)
   ============================================ */

.site-footer {
    border-top: 1px solid var(--color-border);
    padding: var(--space-lg) var(--space-md);
    text-align: center;
}

.site-footer p {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin-inline: auto;
}

.site-footer a {
    color: var(--color-accent);
}

.site-footer .footer-name {
    font-family: var(--font-heading);
    font-size: var(--text-lg);
    color: var(--color-text);
    margin-bottom: var(--space-xs);
}


/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 768px) {
    .project-grid {
        grid-template-columns: 1fr;
    }

    .section {
        padding-block: var(--space-lg);
    }
}

@media (max-width: 480px) {
    :root {
        --space-md: 1rem;
    }

    .site-nav ul {
        gap: var(--space-sm);
    }
}