/* ============================================================
   Derry Digs LLC — Stylesheet
   Warm archaeology/heritage palette: parchment, clay, deep green
   ============================================================ */

/* ── Custom Properties ─────────────────────────────────────── */
:root {
    --color-parchment:   #F5F0E6;
    --color-sand:        #E8DCC8;
    --color-border:      #D4C09A;
    --color-clay:        #C4956A;
    --color-clay-dark:   #A87448;
    --color-earth:       #4A3728;
    --color-earth-dark:  #291C0E;
    --color-text:        #3A2E22;
    --color-text-muted:  #7A6A56;
    --color-green:       #3A5236;
    --color-green-mid:   #4A6844;
    --color-green-pale:  #EEF2EB;
    --color-white:       #FDFAF4;

    --font-heading: 'Playfair Display', Georgia, 'Times New Roman', serif;
    --font-body:    'Source Serif 4', Georgia, 'Times New Roman', serif;

    --container-max: 1080px;
    --radius: 3px;
    --transition: 180ms ease;
}

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

html {
    scroll-behavior: smooth;
    font-size: 18px;
}

body {
    font-family: var(--font-body);
    color: var(--color-text);
    background-color: var(--color-white);
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
}

/* ── Accessibility: skip link ──────────────────────────────── */
.skip-link {
    position: absolute;
    top: -120%;
    left: 1rem;
    background: var(--color-green);
    color: #fff;
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-family: var(--font-body);
    text-decoration: none;
    z-index: 9999;
}
.skip-link:focus {
    top: 1rem;
}

/* ── Typography ────────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--color-earth);
    line-height: 1.25;
    font-weight: 600;
}

h1 { font-size: clamp(2rem, 5vw, 3.25rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.1rem); }
h3 { font-size: clamp(1.05rem, 2vw, 1.2rem); font-weight: 600; }

p { margin-bottom: 1.1rem; }
p:last-child { margin-bottom: 0; }

a {
    color: var(--color-green);
    transition: color var(--transition);
}
a:hover, a:focus-visible {
    color: var(--color-green-mid);
}

/* ── Layout helpers ────────────────────────────────────────── */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: 5rem 0;
}

.section-header {
    margin-bottom: 3rem;
}

.section-header h2 {
    margin-bottom: 0.75rem;
}

.section-divider {
    width: 44px;
    height: 3px;
    background: var(--color-clay);
    border-radius: 2px;
}

/* ── Buttons ───────────────────────────────────────────────── */
.btn {
    display: inline-block;
    padding: 0.7rem 1.65rem;
    border-radius: var(--radius);
    font-family: var(--font-body);
    font-size: 0.92rem;
    font-weight: 600;
    letter-spacing: 0.025em;
    text-decoration: none;
    transition: background-color var(--transition), color var(--transition), transform var(--transition), border-color var(--transition);
    cursor: pointer;
    border: 2px solid transparent;
}

.btn:focus-visible {
    outline: 3px solid var(--color-clay);
    outline-offset: 3px;
}

.btn-primary {
    background-color: var(--color-green);
    color: #fff;
    border-color: var(--color-green);
}
.btn-primary:hover, .btn-primary:focus {
    background-color: var(--color-green-mid);
    border-color: var(--color-green-mid);
    color: #fff;
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-parchment);
    border-color: rgba(245, 240, 230, 0.6);
}
.btn-secondary:hover, .btn-secondary:focus {
    background-color: rgba(245, 240, 230, 0.12);
    border-color: var(--color-parchment);
    color: var(--color-parchment);
}


/* ============================================================
   HEADER / NAV
   ============================================================ */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: var(--color-earth-dark);
    box-shadow: 0 2px 16px rgba(0, 0, 0, 0.25);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 2rem;
    height: 62px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--color-parchment);
    text-decoration: none;
    letter-spacing: 0.01em;
    flex-shrink: 0;
    transition: color var(--transition);
}
.nav-brand:hover, .nav-brand:focus-visible {
    color: var(--color-clay);
}
.nav-logo {
    height: 64px;
    width: auto;
    display: block;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
    list-style: none;
}

.nav-menu a {
    color: var(--color-sand);
    text-decoration: none;
    font-size: 0.88rem;
    letter-spacing: 0.04em;
    transition: color var(--transition);
}
.nav-menu a:hover, .nav-menu a:focus-visible {
    color: var(--color-clay);
}

.nav-cta {
    background-color: var(--color-green) !important;
    color: #fff !important;
    padding: 0.35rem 0.9rem !important;
    border-radius: var(--radius);
    font-weight: 600 !important;
}
.nav-cta:hover, .nav-cta:focus-visible {
    background-color: var(--color-green-mid) !important;
    color: #fff !important;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: var(--radius);
}
.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-sand);
    border-radius: 2px;
    transition: transform 220ms ease, opacity 220ms ease;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
}
.nav-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}


/* ============================================================
   HERO
   ============================================================ */
.hero {
    position: relative;
    background-color: #1F1408;
    background-image:
        radial-gradient(ellipse 70% 80% at 20% 70%, rgba(58, 82, 54, 0.45) 0%, transparent 60%),
        radial-gradient(ellipse 60% 50% at 80% 30%, rgba(74, 55, 40, 0.5) 0%, transparent 55%),
        linear-gradient(160deg, #291C0E 0%, #1F1408 50%, #1A2218 100%);
    color: var(--color-parchment);
    padding: 6rem 0 5.5rem;
    min-height: 80vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

/* subtle stratigraphy lines */
.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 59px,
            rgba(196, 149, 106, 0.05) 59px,
            rgba(196, 149, 106, 0.05) 60px
        );
    pointer-events: none;
}

.hero-content {
    position: relative;
}

.hero-overline {
    font-family: var(--font-body);
    font-size: 0.78rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-clay);
    margin-bottom: 1rem;
    font-weight: 600;
}

.hero h1 {
    color: var(--color-parchment);
    font-weight: 700;
    margin-bottom: 2rem;
    max-width: 20ch;
    line-height: 1.2;
}

.hero-body {
    max-width: 58ch;
    font-size: 1.02rem;
    line-height: 1.8;
    color: var(--color-sand);
    margin-bottom: 1rem;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 2.25rem;
}


/* ============================================================
   WHAT SECTION
   ============================================================ */
.what-section {
    background-color: var(--color-parchment);
    border-bottom: 1px solid var(--color-border);
}

.lead-text {
    font-family: var(--font-heading);
    font-size: clamp(1.15rem, 2.5vw, 1.35rem);
    font-style: italic;
    color: var(--color-earth);
    margin-bottom: 1.5rem;
}


/* ============================================================
   SERVICES
   ============================================================ */
.services-section {
    background-color: var(--color-white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
    gap: 1.5rem;
}

.service-card {
    background-color: var(--color-parchment);
    border: 1px solid var(--color-border);
    border-top: 3px solid var(--color-clay);
    border-radius: var(--radius);
    padding: 1.75rem;
    transition: box-shadow var(--transition), transform var(--transition);
}
.service-card:hover {
    box-shadow: 0 6px 24px rgba(74, 55, 40, 0.1);
    transform: translateY(-2px);
}

.service-mark {
    width: 32px;
    height: 32px;
    margin-bottom: 1rem;
    background-color: var(--color-sand);
    border: 2px solid var(--color-clay);
    border-radius: 50%;
    position: relative;
}
.service-mark::after {
    content: '';
    position: absolute;
    inset: 6px;
    background-color: var(--color-clay);
    border-radius: 50%;
    opacity: 0.6;
}

.service-card h3 {
    margin-bottom: 0.75rem;
    color: var(--color-earth);
    font-size: 1.05rem;
}

.service-card p {
    font-size: 0.92rem;
    line-height: 1.7;
    color: var(--color-text);
    margin-bottom: 0;
}


/* ============================================================
   ABOUT
   ============================================================ */
.about-section {
    background-color: var(--color-parchment);
}

.about-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 3rem;
    align-items: start;
}

.about-photo {
    width: 100%;
    border-radius: var(--radius);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.15);
    display: block;
}


.about-text p {
    font-size: 1rem;
    line-height: 1.8;
}

.about-credentials {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    margin-top: 2rem;
    padding: 1.25rem 1.5rem;
    background-color: var(--color-white);
    border-left: 4px solid var(--color-green);
    border-radius: 0 var(--radius) var(--radius) 0;
    font-size: 0.95rem;
    color: var(--color-earth);
    line-height: 1.6;
}
.about-credentials strong {
    font-size: 1rem;
    color: var(--color-earth-dark);
}
.about-credentials span {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}
.about-credentials a {
    color: var(--color-green);
    text-decoration: none;
}
.about-credentials a:hover {
    text-decoration: underline;
}
.about-docs-sep {
    margin: 0 0.35rem;
    color: var(--color-text-muted);
}


/* ============================================================
   EXPERIENCE
   ============================================================ */
.experience-section {
    background-color: var(--color-white);
}

.experience-list {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
    gap: 0 2.5rem;
    margin-bottom: 2.5rem;
}

.experience-list li {
    padding: 0.65rem 0 0.65rem 1.4rem;
    position: relative;
    font-size: 0.95rem;
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text);
}
.experience-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 7px;
    height: 7px;
    background-color: var(--color-clay);
    border-radius: 50%;
}

.future-note {
    color: var(--color-text-muted);
    font-size: 0.85rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-border);
}


/* ============================================================
   CONTACT
   ============================================================ */
.contact-section {
    background-color: var(--color-earth-dark);
    background-image: linear-gradient(160deg, #291C0E 0%, #1A2218 100%);
    color: var(--color-parchment);
}

.contact-section .section-header h2 {
    color: var(--color-parchment);
}

.contact-divider {
    background: var(--color-clay);
}

.contact-intro {
    color: var(--color-sand);
    font-size: 1.02rem;
    margin-bottom: 1.25rem;
}

.contact-email {
    display: block;
    font-family: var(--font-heading);
    font-size: clamp(1.2rem, 3.5vw, 1.75rem);
    color: var(--color-clay);
    text-decoration: none;
    word-break: break-word;
    margin-bottom: 0.5rem;
    transition: color var(--transition);
}
.contact-email:hover, .contact-email:focus-visible {
    color: var(--color-parchment);
}

.contact-actions {
    margin-top: 1.75rem;
}


/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
    background-color: #160F06;
    border-top: 1px solid rgba(255, 255, 255, 0.07);
    padding: 2rem 0;
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-brand {
    font-family: var(--font-heading);
    font-size: 1rem;
    color: var(--color-parchment);
    font-weight: 700;
    margin-bottom: 0.2rem;
}

.footer-tagline {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.footer-copy {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    text-align: right;
}


/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
    html { font-size: 16px; }

    .section { padding: 3.5rem 0; }

    .about-layout {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    .about-photo {
        max-width: 220px;
        margin: 0 auto;
    }

    /* Mobile nav */
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: 62px;
        left: 0;
        right: 0;
        background-color: var(--color-earth-dark);
        flex-direction: column;
        align-items: flex-start;
        padding: 1rem 2rem 1.5rem;
        gap: 0.25rem;
        border-top: 1px solid rgba(255,255,255,0.08);
        box-shadow: 0 12px 28px rgba(0,0,0,0.35);
    }

    .nav-menu.is-open {
        display: flex;
    }

    .nav-menu li {
        width: 100%;
    }

    .nav-menu a {
        display: block;
        padding: 0.6rem 0;
        font-size: 1rem;
        border-bottom: 1px solid rgba(255,255,255,0.06);
        width: 100%;
    }

    .nav-cta {
        margin-top: 0.5rem;
        padding: 0.5rem 1rem !important;
        text-align: center;
        border-radius: var(--radius) !important;
    }

    .hero {
        min-height: 70vh;
        padding: 4rem 0;
    }

    .hero h1 {
        max-width: 100%;
    }

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

    .experience-list {
        grid-template-columns: 1fr;
    }

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

    .footer-copy {
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container { padding: 0 1.25rem; }

    .hero-actions {
        flex-direction: column;
    }

    .btn {
        text-align: center;
        width: 100%;
        max-width: 280px;
    }
}

/* ── Focus styles (keyboard navigation) ────────────────────── */
a:focus-visible,
button:focus-visible {
    outline: 3px solid var(--color-clay);
    outline-offset: 3px;
    border-radius: 2px;
}