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

:root {
    --light-bg:      #f0efe9;
    --light-surface: #ffffff;
    --light-alt:     #e8e7e0;
    --light-text:    #1a1f1e;
    --light-muted:   #6b7270;
    --light-border:  #d4d2ca;
    --dark-bg:       #141717;
    --dark-surface:  #191d1d;
    --dark-border:   #252b2b;
    --dark-text:     #e8edec;
    --dark-muted:    #5a6666;
    --accent:        #2a7d5f;
    --accent-light:  #1a5c45;
    --accent-glow:   #00e5b0;
    --max: 1200px;
}

html { scroll-behavior: smooth; }

body {
    background: var(--light-bg);
    color: var(--light-text);
    font-family: 'DM Mono', monospace;
    font-size: 16.5px;
    line-height: 1.7;
}

a { text-decoration: none; transition: all 0.2s; }

/* ════════════════════════════════════════
   BLOCK 1 — TOP BAR (light)
════════════════════════════════════════ */
.topbar {
    background: var(--light-bg);
    border-bottom: 1px solid var(--light-border);
    padding: 0 32px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.topbar-logo {
    font-family: 'Syne', sans-serif;
    font-weight: 800;
    font-size: 1rem;
    letter-spacing: 0.22em;
    color: var(--accent-light);
}

.topbar-contact {
    display: flex;
    align-items: center;
    gap: 20px;
}

.topbar-contact a {
    font-size: 0.62rem;
    color: var(--light-muted);
    letter-spacing: 0.08em;
    display: flex;
    align-items: center;
    gap: 6px;
}

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

.topbar-contact .sep {
    width: 1px;
    height: 12px;
    background: var(--light-border);
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.lang-switcher { display: flex; gap: 2px; }

.lang-btn {
    background: transparent;
    border: 1px solid transparent;
    color: var(--light-muted);
    font-family: 'DM Mono', monospace;
    font-size: 0.6rem;
    letter-spacing: 0.1em;
    padding: 3px 7px;
    cursor: pointer;
    transition: all 0.15s;
}

.lang-btn:hover { color: var(--light-text); border-color: var(--light-border); }

.lang-btn.active {
    color: var(--accent-light);
    border-color: var(--accent-light);
    background: rgba(0,168,130,0.06);
}

.equel-link {
    font-size: 0.6rem;
    letter-spacing: 0.12em;
    color: var(--accent-light);
    border: 1px solid var(--accent-light);
    padding: 4px 12px;
    font-family: 'Syne', sans-serif;
    font-weight: 700;
    text-transform: uppercase;
}

.equel-link:hover { background: var(--accent-light); color: white; }

/* ════════════════════════════════════════
   BLOCK 2 — MAIN NAV (dark)
════════════════════════════════════════ */
.mainnav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--dark-bg);
    border-bottom: 1px solid var(--dark-border);
}

.mainnav-inner {
    max-width: var(--max);
    margin: 0 auto;
    padding: 0 32px;
    height: 54px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.mainnav-tagline {
    font-size: 0.6rem;
    color: var(--dark-muted);
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

nav {
    display: flex;
    align-items: center;
    gap: 32px;
}

nav a {
    font-size: 0.63rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--dark-muted);
    transition: color 0.2s;
}

nav a:hover { color: var(--dark-text); }
nav a.active { color: var(--accent-glow); }

/* ════════════════════════════════════════
   BLOCK 3 — CONTENT (light alternating)
════════════════════════════════════════ */

/* ── HERO ── */
.hero {
    background: var(--light-bg);
    position: relative;
    padding: 90px 32px 0;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(var(--light-border) 1px, transparent 1px),
        linear-gradient(90deg, var(--light-border) 1px, transparent 1px);
    background-size: 50px 50px;
    opacity: 0.45;
}

.hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 70% 80% at 25% 50%, var(--light-bg) 40%, transparent 100%);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: var(--max);
    margin: 0 auto;
}

.hero-eyebrow {
    font-size: 0.62rem;
    letter-spacing: 0.28em;
    color: var(--accent-light);
    text-transform: uppercase;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 14px;
}

.hero-eyebrow::before {
    content: '';
    width: 28px;
    height: 1px;
    background: var(--accent-light);
}

h1.hero-title {
    font-family: 'Syne', sans-serif;
    font-size: clamp(2.6rem, 6vw, 5rem);
    font-weight: 800;
    line-height: 1.04;
    letter-spacing: -0.02em;
    color: var(--light-text);
    margin-bottom: 28px;
}

.hero-sub {
    font-size: 0.87rem;
    color: var(--light-muted);
    max-width: 520px;
    line-height: 1.85;
    margin-bottom: 44px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    padding: 13px 32px;
    background: var(--accent-light);
    color: #ffffff;
    font-family: 'Syne', sans-serif;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary:hover {
    background: var(--accent);
    box-shadow: 0 4px 24px rgba(0,168,130,0.22);
    transform: translateY(-1px);
    color: white;
}

.btn-ghost {
    display: inline-flex;
    align-items: center;
    padding: 13px 32px;
    background: transparent;
    color: var(--light-text);
    font-family: 'Syne', sans-serif;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    border: 1px solid var(--light-border);
    transition: all 0.2s;
}

.btn-ghost:hover { border-color: var(--light-text); color: var(--light-text); }

.hero-stats {
    position: relative;
    z-index: 1;
    max-width: var(--max);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    border-top: 1px solid var(--light-border);
    border-left: 1px solid var(--light-border);
}

.stat {
    padding: 26px 28px;
    border-right: 1px solid var(--light-border);
    border-bottom: 1px solid var(--light-border);
    background: var(--light-surface);
    transition: background 0.2s;
}

.stat:hover { background: var(--light-alt); }

.stat-value {
    font-family: 'Syne', sans-serif;
    font-size: 2rem;
    font-weight: 800;
    color: var(--accent-light);
    line-height: 1;
    margin-bottom: 6px;
}

.stat-value span {
    font-size: 0.82rem;
    color: var(--light-muted);
    font-weight: 400;
}

.stat-label {
    font-size: 0.58rem;
    color: var(--light-muted);
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

/* ── SECTIONS ── */
.section { padding: 88px 32px; }
.section-white { background: var(--light-surface); }
.section-light { background: var(--light-bg); }
.section-alt   { background: var(--light-alt); }

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

.section-label {
    font-size: 0.58rem;
    letter-spacing: 0.28em;
    color: var(--accent-light);
    text-transform: uppercase;
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.section-label::before {
    content: '';
    width: 20px;
    height: 1px;
    background: var(--accent-light);
}

.section-inner > h2 {
    font-family: 'Syne', sans-serif;
    font-size: clamp(1.7rem, 3vw, 2.5rem);
    font-weight: 700;
    line-height: 1.15;
    color: var(--light-text);
    margin-bottom: 48px;
}

/* ── ABOUT ── */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 72px;
    align-items: start;
}

.about-text h2 {
    font-family: 'Syne', sans-serif;
    font-size: clamp(1.7rem, 3vw, 2.5rem);
    font-weight: 700;
    line-height: 1.15;
    color: var(--light-text);
    margin-bottom: 26px;
}

.about-text p {
    font-size: 0.82rem;
    color: var(--light-muted);
    margin-bottom: 16px;
    line-height: 1.9;
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: 1px;
    background: var(--light-border);
    border: 1px solid var(--light-border);
}

.feature {
    display: flex;
    gap: 18px;
    align-items: flex-start;
    padding: 20px 22px;
    background: var(--light-surface);
    transition: background 0.15s;
}

.feature:hover { background: var(--light-bg); }

.feature-icon { font-size: 0.95rem; color: var(--accent-light); flex-shrink: 0; margin-top: 3px; }

.feature-title {
    font-family: 'Syne', sans-serif;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: var(--light-text);
    margin-bottom: 4px;
}

.feature-desc { font-size: 0.69rem; color: var(--light-muted); line-height: 1.7; }

/* ── SERVICES ── */
.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1px;
    background: var(--light-border);
    border: 1px solid var(--light-border);
}

.service-card {
    background: var(--light-surface);
    padding: 38px;
    transition: background 0.2s;
}

.service-card:hover { background: var(--light-bg); }

.service-num {
    font-family: 'Syne', sans-serif;
    font-size: 0.58rem;
    letter-spacing: 0.22em;
    color: var(--accent-light);
    margin-bottom: 12px;
}

.service-title {
    font-family: 'Syne', sans-serif;
    font-size: 1rem;
    font-weight: 700;
    color: var(--light-text);
    margin-bottom: 12px;
    letter-spacing: 0.03em;
}

.service-desc {
    font-size: 0.76rem;
    color: var(--light-muted);
    line-height: 1.85;
    margin-bottom: 22px;
}

.service-list { list-style: none; display: flex; flex-direction: column; gap: 7px; }

.service-list li {
    font-size: 0.67rem;
    color: var(--light-muted);
    padding-left: 14px;
    position: relative;
    letter-spacing: 0.03em;
}

.service-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent-light);
    font-size: 0.6rem;
}

/* ── MATERIALS ── */
.materials-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 1px;
    background: var(--light-border);
    border: 1px solid var(--light-border);
}

.material-card {
    padding: 26px 18px;
    background: var(--light-surface);
    transition: background 0.2s;
}

.material-card:hover { background: var(--light-bg); }

.material-featured {
    background: rgba(0,168,130,0.04);
    border-top: 2px solid var(--accent-light);
}

.material-density {
    font-family: 'Syne', sans-serif;
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--accent-light);
    line-height: 1;
}

.material-density span { font-size: 0.65rem; color: var(--light-muted); font-weight: 400; }

.material-name {
    font-family: 'Syne', sans-serif;
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--light-text);
    letter-spacing: 0.05em;
    margin: 8px 0 8px;
}

.material-desc { font-size: 0.64rem; color: var(--light-muted); line-height: 1.7; margin-bottom: 12px; }

.material-tag {
    display: inline-block;
    font-size: 0.5rem;
    letter-spacing: 0.18em;
    color: var(--accent-light);
    border: 1px solid var(--accent-light);
    padding: 2px 7px;
    opacity: 0.65;
}

/* ── REQUIREMENTS ── */
.req-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: var(--light-border);
    border: 1px solid var(--light-border);
}

.req-block { padding: 34px; background: var(--light-surface); }

.req-num {
    font-family: 'Syne', sans-serif;
    font-size: 0.56rem;
    letter-spacing: 0.22em;
    color: var(--accent-light);
    margin-bottom: 8px;
}

.req-title {
    font-family: 'Syne', sans-serif;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--light-text);
    margin-bottom: 12px;
    letter-spacing: 0.03em;
}

.req-block p { font-size: 0.71rem; color: var(--light-muted); margin-bottom: 12px; }

.format-list { display: flex; flex-wrap: wrap; gap: 5px; }

.format-list span {
    font-size: 0.56rem;
    letter-spacing: 0.1em;
    border: 1px solid var(--light-border);
    padding: 2px 8px;
    color: var(--light-muted);
    background: var(--light-bg);
}

.req-list { list-style: none; display: flex; flex-direction: column; gap: 9px; }

.req-list li {
    font-size: 0.69rem;
    color: var(--light-muted);
    padding-left: 13px;
    position: relative;
    line-height: 1.6;
}

.req-list li::before { content: '·'; position: absolute; left: 0; color: var(--accent-light); font-weight: 700; }
.req-list b { color: var(--light-text); font-weight: 600; }

/* ── GALLERY ── */
.gallery-grid {
    columns: 4;
    column-gap: 6px;
}

.gallery-item {
    break-inside: avoid;
    margin-bottom: 6px;
    overflow: hidden;
    cursor: pointer;
}

.gallery-item img {
    width: 100%;
    display: block;
    transition: transform 0.4s ease, filter 0.3s;
    filter: saturate(0.9);
}

.gallery-item:hover img { transform: scale(1.05); filter: saturate(1.1); }

/* ── CONTACT ── */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 72px;
    align-items: start;
}

.contact-item { margin-bottom: 26px; }

.contact-label {
    font-size: 0.55rem;
    letter-spacing: 0.22em;
    color: var(--light-muted);
    text-transform: uppercase;
    margin-bottom: 5px;
}

.contact-value { font-size: 0.82rem; color: var(--light-text); line-height: 1.7; }
.contact-value a { color: var(--light-text); }
.contact-value a:hover { color: var(--accent-light); }

.contact-form { display: flex; flex-direction: column; gap: 10px; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }

.form-input {
    width: 100%;
    background: var(--light-bg);
    border: 1px solid var(--light-border);
    color: var(--light-text);
    font-family: 'DM Mono', monospace;
    font-size: 0.72rem;
    padding: 12px 16px;
    outline: none;
    transition: border-color 0.15s;
}

.form-input::placeholder { color: var(--light-muted); }

.form-input:focus {
    border-color: var(--accent-light);
    box-shadow: 0 0 0 3px rgba(0,168,130,0.08);
}

.form-textarea { min-height: 140px; resize: vertical; }

/* ════════════════════════════════════════
   BLOCK 4 — FOOTER (dark)
════════════════════════════════════════ */
footer {
    background: var(--dark-bg);
    border-top: 1px solid var(--dark-border);
    padding: 26px 32px;
}

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

.footer-left { display: flex; align-items: center; gap: 20px; }

.footer-logo {
    font-family: 'Syne', sans-serif;
    font-weight: 800;
    font-size: 0.9rem;
    letter-spacing: 0.22em;
    color: var(--accent-glow);
}

.footer-copy { font-size: 0.59rem; color: var(--dark-muted); letter-spacing: 0.06em; }
.footer-right { font-size: 0.57rem; color: var(--dark-muted); letter-spacing: 0.08em; }
.footer-right a { color: var(--dark-muted); }
.footer-right a:hover { color: var(--accent-glow); }

/* ── ANIMATIONS ── */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(14px); }
    to   { opacity: 1; transform: translateY(0); }
}

.hero-content { animation: fadeUp 0.55s ease both; }
.hero-stats   { animation: fadeUp 0.55s 0.15s ease both; }

/* ── RESPONSIVE ── */
@media (max-width: 960px) {
    .hero-stats     { grid-template-columns: repeat(2, 1fr); }
    .about-grid     { grid-template-columns: 1fr; gap: 40px; }
    .services-grid  { grid-template-columns: 1fr; }
    .materials-grid { grid-template-columns: repeat(2, 1fr); }
    .req-grid       { grid-template-columns: 1fr; }
    .contact-grid   { grid-template-columns: 1fr; gap: 40px; }
    .gallery-grid   { columns: 3; }
    nav             { display: none; }
    .topbar-contact { display: none; }
}

@media (max-width: 600px) {
    .materials-grid { grid-template-columns: 1fr 1fr; }
    .form-row       { grid-template-columns: 1fr; }
    .gallery-grid   { columns: 2; }
}

.hero-trust {
    font-size: 0.75rem;
    color: var(--light-muted);
    margin-bottom: 16px;
    letter-spacing: 0.06em;
}

/* ── READABILITY OVERRIDE ── */
.service-desc,
.about-text p,
.feature-desc,
.material-desc,
.req-block p,
.req-list li,
.service-list li {
    font-size: 0.95rem;
    line-height: 1.9;
}

.contact-value,
.format-list span {
    font-size: 0.88rem;
}

nav a {
    font-size: 0.8rem;
}

.mainnav-tagline {
    font-size: 0.75rem;
}

.topbar-contact a,
.topbar-logo,
.lang-btn,
.equel-link {
    font-size: 0.75rem;
}

nav a {
    padding: 0 8px;
    height: 56px;
    margin-bottom: -1px;
    display: flex;
    align-items: center;
    transition: background 0.15s, color 0.15s;
}

nav a:hover {
    background: var(--dark-text);
    color: var(--dark-bg);
    opacity: 1;
}

/* ── DARK SECTIONS BRIGHTNESS ── */
.mainnav {
    background: #2a3232;
}

footer {
    background: #2a3232;
}

nav a {
    color: #b0c4be;
}

nav a:hover {
    background: #e8edec;
    color: #1e2424;
}

.mainnav-tagline {
    color: #b0c4be;
}

.footer-copy,
.footer-right,
.footer-right a {
    color: #b0c4be;
}

.footer-logo {
    color: var(--accent-glow);
}

@media (max-width: 960px) {
    .topbar {
        padding: 0 16px;
        height: auto;
        flex-wrap: wrap;
        gap: 8px;
        padding-top: 8px;
        padding-bottom: 8px;
    }

    .topbar-right {
        width: 100%;
        justify-content: space-between;
    }

    .mainnav-inner {
        padding: 0 16px;
        flex-direction: column;
        height: auto;
        padding-top: 8px;
        padding-bottom: 8px;
        gap: 10px;
    }

    nav {
        display: flex;
        flex-wrap: wrap;
        gap: 4px 16px;
        justify-content: center;
    }

    nav a {
        height: auto;
        padding: 6px 8px;
        font-size: 0.72rem;
    }
}