/* ============================================================
   Shravas Filaments — Premium Navy & Gold Theme
   ============================================================ */

:root {
    --navy-900: #0b1424;
    --navy-800: #101c30;
    --navy-700: #16263f;
    --navy-600: #1d3350;
    --gold: #c99a3f;
    --gold-light: #e0be74;
    --gold-dark: #a97f2c;
    --cream: #f6f2ea;
    --paper: #f8f9fb;
    --ink: #1a2436;
    --muted: #6b7686;
    --white: #ffffff;
    --line: rgba(201, 154, 63, 0.25);

    --serif: "Playfair Display", Georgia, serif;
    --sans: "Poppins", system-ui, -apple-system, sans-serif;

    --radius: 14px;
    --radius-lg: 22px;
    --shadow-sm: 0 6px 20px rgba(11, 20, 36, 0.08);
    --shadow-md: 0 18px 50px rgba(11, 20, 36, 0.14);
    --shadow-gold: 0 12px 30px rgba(201, 154, 63, 0.35);
    --container: 1200px;
    --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html { scroll-behavior: smooth; scroll-padding-top: 90px; }

body {
    font-family: var(--sans);
    color: var(--ink);
    background: var(--paper);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

.container {
    width: 100%;
    max-width: var(--container);
    margin-inline: auto;
    padding-inline: 24px;
}

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 26px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    letter-spacing: 0.02em;
    cursor: pointer;
    border: 1.5px solid transparent;
    transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease),
        background 0.3s, color 0.3s, border-color 0.3s;
    white-space: nowrap;
}
.btn .arrow { transition: transform 0.35s var(--ease); }
.btn:hover .arrow { transform: translateX(5px); }

.btn-gold {
    background: linear-gradient(135deg, var(--gold-light), var(--gold));
    color: var(--navy-900);
    box-shadow: var(--shadow-gold);
}
.btn-gold:hover { transform: translateY(-3px); box-shadow: 0 16px 40px rgba(201, 154, 63, 0.5); }

.btn-outline {
    background: transparent;
    color: var(--white);
    border-color: rgba(255, 255, 255, 0.55);
}
.btn-outline:hover { background: var(--white); color: var(--navy-900); transform: translateY(-3px); }

.btn.full { width: 100%; justify-content: center; }
.btn.small { padding: 10px 18px; font-size: 0.85rem; }

/* ============================================================
   HEADER / NAV
   ============================================================ */
.site-header {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 1000;
    padding: 18px 0;
    transition: background 0.4s var(--ease), padding 0.4s var(--ease),
        box-shadow 0.4s var(--ease);
}
.site-header.scrolled {
    background: rgba(11, 20, 36, 0.92);
    backdrop-filter: blur(12px);
    padding: 10px 0;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}
.nav-wrap { display: flex; align-items: center; gap: 28px; }

.brand { display: flex; flex-direction: column; align-items: center; gap: 0; color: var(--gold); line-height: 1; }
.brand-logo { height: 80px; width: auto; display: block; transition: height 0.4s var(--ease); }
.site-header.scrolled .brand-logo { height: 64px; }
.brand-mark { display: grid; place-items: center; color: var(--gold); }
.brand-text { display: flex; flex-direction: column; line-height: 1; }
.brand-name {
    font-family: var(--serif);
    font-weight: 700;
    font-size: 1.35rem;
    letter-spacing: 0.28em;
    color: var(--gold);
}
.brand-sub {
    font-size: 0.6rem;
    letter-spacing: 0.62em;
    color: var(--gold-light);
    margin-top: -4px;
    padding-left: 0.62em;
    text-align: center;
}

.main-nav { display: flex; gap: 30px; margin-left: auto; }
.main-nav a {
    color: rgba(255, 255, 255, 0.85);
    font-size: 0.92rem;
    font-weight: 500;
    position: relative;
    padding: 6px 0;
    transition: color 0.3s;
}
.main-nav a::after {
    content: "";
    position: absolute;
    left: 0; bottom: 0;
    width: 0; height: 2px;
    background: var(--gold);
    transition: width 0.35s var(--ease);
}
.main-nav a:hover, .main-nav a.active { color: var(--gold-light); }
.main-nav a:hover::after, .main-nav a.active::after { width: 100%; }

.nav-cta { padding: 11px 22px; }

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
}
.nav-toggle span {
    width: 26px; height: 2.5px;
    background: var(--gold-light);
    border-radius: 2px;
    transition: 0.3s var(--ease);
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* ============================================================
   HERO
   ============================================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-top: 120px;
    padding-bottom: 40px;
    overflow: hidden;
}
.hero-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: 22% center;
    transform: scale(1.05);
    animation: slowZoom 18s ease-in-out infinite alternate;
}
@keyframes slowZoom { to { transform: scale(1.14); } }
.hero-overlay {
    position: absolute;
    inset: 0;
    background:
        linear-gradient(100deg, var(--navy-900) 8%, rgba(11, 20, 36, 0.85) 38%, rgba(11, 20, 36, 0.35) 62%, rgba(11, 20, 36, 0.15) 100%);
}
.hero-content { position: relative; z-index: 2; max-width: 640px; margin-top: auto; }

.eyebrow {
    display: flex;
    align-items: center;
    gap: 14px;
    color: var(--gold-light);
    font-weight: 500;
    letter-spacing: 0.14em;
    text-transform: capitalize;
    font-size: 1rem;
    margin-bottom: 18px;
}
.eyebrow .line { width: 46px; height: 2px; background: var(--gold); display: inline-block; }

.hero-title {
    font-family: var(--serif);
    color: var(--white);
    font-weight: 700;
    font-size: clamp(2.8rem, 7vw, 5.2rem);
    line-height: 1.02;
    letter-spacing: 0.01em;
    margin-bottom: 24px;
}
.hero-lead {
    color: rgba(255, 255, 255, 0.85);
    font-size: 1.18rem;
    font-weight: 300;
    max-width: 460px;
    margin-bottom: 34px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* Hero feature strip */
.hero-features {
    position: relative;
    z-index: 2;
    margin-top: 56px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    background: rgba(16, 28, 48, 0.55);
    border: 1px solid rgba(201, 154, 63, 0.28);
    border-radius: var(--radius);
    padding: 22px 8px;
    backdrop-filter: blur(6px);
}
.feature {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 6px 20px;
    position: relative;
}
.feature:not(:last-child)::after {
    content: "";
    position: absolute;
    right: 0; top: 15%;
    height: 70%;
    width: 1px;
    background: rgba(201, 154, 63, 0.3);
}
.feature-icon {
    flex-shrink: 0;
    width: 44px; height: 44px;
    display: grid; place-items: center;
    color: var(--gold-light);
}
.feature-icon svg { width: 30px; height: 30px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.feature h4 { color: var(--white); font-size: 0.98rem; font-weight: 600; }
.feature p { color: rgba(255, 255, 255, 0.7); font-size: 0.82rem; line-height: 1.35; }

/* ============================================================
   SECTION GENERICS
   ============================================================ */
.section { padding: 100px 0; position: relative; }
.section-head { max-width: 720px; margin-bottom: 56px; }
.section-head.center { margin-inline: auto; text-align: center; }

.section-eyebrow {
    color: var(--gold-dark);
    font-weight: 600;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    font-size: 0.8rem;
    margin-bottom: 14px;
    position: relative;
    display: inline-block;
}
.section-eyebrow.light { color: var(--gold-light); }

.section-title {
    font-family: var(--serif);
    font-weight: 700;
    font-size: clamp(1.9rem, 3.6vw, 2.9rem);
    line-height: 1.14;
    color: var(--navy-800);
    margin-bottom: 18px;
}
.section-title.light { color: var(--white); }

.section-desc { color: var(--muted); font-size: 1.05rem; font-weight: 300; }
.section-desc.light { color: rgba(255, 255, 255, 0.78); }

/* Reveal animation */
.reveal { opacity: 0; transform: translateY(38px); transition: opacity 0.8s var(--ease), transform 0.8s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* ============================================================
   ABOUT
   ============================================================ */
.about { background: var(--white); }
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: 64px;
    align-items: center;
}
.about-media { position: relative; }
.about-media img {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    object-fit: cover;
    width: 100%;
    aspect-ratio: 4 / 3.4;
}
.about-badge {
    position: absolute;
    bottom: -26px; right: -20px;
    background: linear-gradient(135deg, var(--navy-800), var(--navy-600));
    color: var(--gold-light);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 20px 26px;
    text-align: center;
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
}
.about-badge .est { font-size: 0.75rem; letter-spacing: 0.25em; color: rgba(255,255,255,0.6); }
.about-badge .year { font-family: var(--serif); font-size: 2rem; font-weight: 700; color: var(--gold-light); }

.about-text p { color: var(--muted); margin-bottom: 18px; }
.about-text blockquote {
    border-left: 3px solid var(--gold);
    padding: 6px 0 6px 22px;
    margin: 26px 0;
    font-family: var(--serif);
    font-style: italic;
    font-size: 1.2rem;
    color: var(--navy-700);
}

/* ============================================================
   WHAT WE DO
   ============================================================ */
.whatwedo { background: var(--paper); }
.do-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 26px; }
.do-card {
    background: var(--white);
    border: 1px solid #eceff4;
    border-radius: var(--radius);
    padding: 34px 28px;
    transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease), border-color 0.4s;
    position: relative;
    overflow: hidden;
}
.do-card::before {
    content: "";
    position: absolute; left: 0; top: 0;
    width: 100%; height: 4px;
    background: linear-gradient(90deg, var(--gold), var(--gold-light));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.45s var(--ease);
}
.do-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-md); border-color: var(--line); }
.do-card:hover::before { transform: scaleX(1); }
.do-num {
    font-family: var(--serif);
    font-size: 2.4rem;
    font-weight: 700;
    color: var(--gold);
    opacity: 0.35;
    display: block;
    margin-bottom: 10px;
}
.do-card h3 { font-size: 1.12rem; color: var(--navy-800); margin-bottom: 10px; }
.do-card p { color: var(--muted); font-size: 0.95rem; }

/* ============================================================
   PRODUCTS
   ============================================================ */
.products { background: var(--white); }
.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 26px; }
.product-card {
    background: linear-gradient(160deg, var(--navy-800), var(--navy-600));
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    color: var(--white);
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(201, 154, 63, 0.18);
    transition: transform 0.45s var(--ease), box-shadow 0.45s var(--ease);
}
.product-card::after {
    content: "";
    position: absolute;
    top: -60px; right: -60px;
    width: 150px; height: 150px;
    background: radial-gradient(circle, rgba(201, 154, 63, 0.35), transparent 70%);
    transition: transform 0.6s var(--ease);
}
.product-card:hover { transform: translateY(-10px); box-shadow: var(--shadow-md); }
.product-card:hover::after { transform: scale(1.4); }
.product-top { margin-bottom: 20px; }
.denier {
    font-family: var(--serif);
    font-size: 3.4rem;
    font-weight: 800;
    color: var(--gold-light);
    line-height: 1;
}
.denier small { font-size: 1.1rem; color: var(--gold); margin-left: 2px; letter-spacing: 0.05em; }
.product-card h3 { font-size: 1.1rem; margin-bottom: 10px; font-weight: 600; }
.product-card p { color: rgba(255, 255, 255, 0.72); font-size: 0.9rem; font-weight: 300; margin-bottom: 18px; }
.tag {
    display: inline-block;
    font-size: 0.72rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--gold-light);
    border: 1px solid var(--line);
    border-radius: 30px;
    padding: 5px 14px;
}
.product-note { text-align: center; margin-top: 44px; color: var(--muted); }
.product-note a { color: var(--gold-dark); font-weight: 600; }
.product-note a:hover { color: var(--gold); }

/* ============================================================
   WHY CHOOSE US
   ============================================================ */
.why { background: var(--cream); }
.why-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.why-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 36px 30px;
    box-shadow: var(--shadow-sm);
    transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
    border: 1px solid transparent;
}
.why-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: var(--line); }
.why-icon {
    width: 60px; height: 60px;
    display: grid; place-items: center;
    border-radius: 14px;
    background: linear-gradient(135deg, rgba(201,154,63,0.14), rgba(201,154,63,0.05));
    color: var(--gold-dark);
    margin-bottom: 20px;
}
.why-icon svg { width: 30px; height: 30px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.why-card h3 { font-size: 1.18rem; color: var(--navy-800); margin-bottom: 10px; }
.why-card p { color: var(--muted); font-size: 0.95rem; }
.why-card.accent {
    background: linear-gradient(160deg, var(--navy-800), var(--navy-600));
}
.why-card.accent h3 { color: var(--white); }
.why-card.accent p { color: rgba(255,255,255,0.75); }
.why-card.accent .why-icon { background: rgba(201,154,63,0.2); color: var(--gold-light); }

/* ============================================================
   PROCESS
   ============================================================ */
.process { background: linear-gradient(180deg, var(--navy-900), var(--navy-800)); }
.timeline {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
    position: relative;
}
.timeline::before {
    content: "";
    position: absolute;
    top: 26px; left: 10%; right: 10%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--gold), transparent);
    opacity: 0.5;
}
.step { text-align: center; position: relative; padding-top: 0; }
.step-num {
    width: 54px; height: 54px;
    display: grid; place-items: center;
    margin: 0 auto 20px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--gold-light), var(--gold));
    color: var(--navy-900);
    font-family: var(--serif);
    font-weight: 700;
    font-size: 1.4rem;
    box-shadow: 0 0 0 6px rgba(201,154,63,0.12);
    position: relative;
    z-index: 2;
    transition: transform 0.4s var(--ease);
}
.step:hover .step-num { transform: translateY(-6px) scale(1.06); }
.step h3 { color: var(--white); font-size: 1.05rem; margin-bottom: 8px; }
.step p { color: rgba(255,255,255,0.7); font-size: 0.88rem; font-weight: 300; }

/* ============================================================
   QUALITY
   ============================================================ */
.quality { background: var(--white); }
.quality-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 64px; align-items: center; }
.quality-text p { color: var(--muted); margin-bottom: 20px; }
.check-list { margin: 6px 0 24px; }
.check-list li {
    position: relative;
    padding-left: 34px;
    margin-bottom: 12px;
    color: var(--navy-700);
    font-weight: 500;
}
.check-list li::before {
    content: "";
    position: absolute;
    left: 0; top: 3px;
    width: 20px; height: 20px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--gold-light), var(--gold));
}
.check-list li::after {
    content: "";
    position: absolute;
    left: 6px; top: 8px;
    width: 8px; height: 5px;
    border-left: 2px solid var(--navy-900);
    border-bottom: 2px solid var(--navy-900);
    transform: rotate(-45deg);
}
.quality-goal { color: var(--navy-700); font-size: 1.05rem; }
.quality-goal strong { color: var(--gold-dark); }

.quality-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}
.stat {
    background: linear-gradient(160deg, var(--navy-800), var(--navy-600));
    border-radius: var(--radius);
    padding: 30px 24px;
    text-align: center;
    color: var(--white);
    border: 1px solid var(--line);
}
.stat-num {
    font-family: var(--serif);
    font-size: 3rem;
    font-weight: 800;
    color: var(--gold-light);
    line-height: 1;
}
.stat-suffix { font-family: var(--serif); font-size: 1.6rem; color: var(--gold); }
.stat-label { display: block; margin-top: 8px; font-size: 0.85rem; color: rgba(255,255,255,0.72); letter-spacing: 0.04em; }

/* ============================================================
   FACILITY
   ============================================================ */
.facility { position: relative; padding: 130px 0; overflow: hidden; }
.facility-bg { position: absolute; inset: 0; background-size: cover; background-position: center; }
.facility-overlay { position: absolute; inset: 0; background: linear-gradient(120deg, rgba(11,20,36,0.94), rgba(11,20,36,0.6)); }
.facility-inner { position: relative; z-index: 2; max-width: 660px; }
.facility-lead { color: rgba(255,255,255,0.82); font-size: 1.1rem; font-weight: 300; margin-bottom: 28px; }
.facility-pills { display: flex; flex-wrap: wrap; gap: 14px; }
.facility-pills span {
    padding: 12px 22px;
    border: 1px solid var(--gold);
    border-radius: 40px;
    color: var(--gold-light);
    font-size: 0.9rem;
    font-weight: 500;
    background: rgba(201,154,63,0.08);
}

/* ============================================================
   COMMITMENT
   ============================================================ */
.commitment { background: var(--cream); text-align: center; }
.commit-inner { max-width: 780px; margin-inline: auto; }
.commit-text { color: var(--muted); font-size: 1.1rem; margin-bottom: 30px; }
.commit-tags {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    font-family: var(--serif);
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--navy-800);
}
.commit-tags .dot { color: var(--gold); }

/* ============================================================
   TESTIMONIALS
   ============================================================ */
.testimonials { background: var(--white); }
.testi-card {
    max-width: 820px;
    margin-inline: auto;
    background: linear-gradient(160deg, var(--navy-800), var(--navy-600));
    border-radius: var(--radius-lg);
    padding: 56px 54px 46px;
    color: var(--white);
    position: relative;
    text-align: center;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--line);
}
.quote-mark {
    font-family: var(--serif);
    font-size: 5rem;
    color: var(--gold);
    line-height: 0.6;
    display: block;
    margin-bottom: 10px;
}
.testi-card p { color: rgba(255,255,255,0.85); font-size: 1.12rem; font-weight: 300; }
.testi-foot { color: var(--gold-light) !important; font-size: 0.95rem !important; margin-top: 20px; font-style: italic; }

/* ============================================================
   CONTACT
   ============================================================ */
.contact { background: linear-gradient(180deg, var(--navy-900), var(--navy-800)); }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: start; }
.contact-lead { color: rgba(255,255,255,0.8); font-weight: 300; margin-bottom: 34px; }
.contact-info li { display: flex; gap: 18px; margin-bottom: 24px; align-items: center; }
.ci-icon {
    flex-shrink: 0;
    width: 52px; height: 52px;
    display: grid; place-items: center;
    border-radius: 12px;
    background: rgba(201,154,63,0.14);
    color: var(--gold-light);
}
.ci-icon svg { width: 26px; height: 26px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.ci-label { display: block; font-size: 0.78rem; letter-spacing: 0.14em; text-transform: uppercase; color: rgba(255,255,255,0.55); margin-bottom: 3px; }
.contact-info a, .ci-value { color: var(--white); font-size: 1.05rem; font-weight: 500; }
.contact-info a:hover { color: var(--gold-light); }

.contact-form {
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(201,154,63,0.22);
    border-radius: var(--radius-lg);
    padding: 40px 36px;
    backdrop-filter: blur(6px);
}
.contact-form h3 { color: var(--white); font-family: var(--serif); font-size: 1.4rem; margin-bottom: 26px; font-weight: 600; }
.field { position: relative; margin-bottom: 22px; }
.field input, .field textarea {
    width: 100%;
    padding: 16px 16px 14px;
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.16);
    border-radius: 10px;
    color: var(--white);
    font-family: var(--sans);
    font-size: 0.98rem;
    transition: border-color 0.3s, background 0.3s;
    resize: vertical;
}
.field textarea { min-height: 110px; }
.field input:focus, .field textarea:focus {
    outline: none;
    border-color: var(--gold);
    background: rgba(255,255,255,0.09);
}
.field label {
    position: absolute;
    left: 16px; top: 16px;
    color: rgba(255,255,255,0.55);
    font-size: 0.98rem;
    pointer-events: none;
    transition: 0.25s var(--ease);
}
.field input:focus + label,
.field input:not(:placeholder-shown) + label,
.field textarea:focus + label,
.field textarea:not(:placeholder-shown) + label {
    top: -9px;
    left: 12px;
    font-size: 0.72rem;
    color: var(--gold-light);
    background: var(--navy-800);
    padding: 0 6px;
    letter-spacing: 0.05em;
}
.form-note { margin-top: 16px; color: var(--gold-light); text-align: center; font-weight: 500; }

/* WhatsApp button + divider inside form */
.form-divider { display: flex; align-items: center; gap: 14px; margin: 20px 0 16px; color: rgba(255,255,255,0.4); font-size: 0.85rem; }
.form-divider::before, .form-divider::after { content: ""; flex: 1; height: 1px; background: rgba(255,255,255,0.14); }
.btn-whatsapp {
    background: #25d366;
    color: #063a1e;
    font-weight: 600;
}
.btn-whatsapp:hover { background: #1fbe5a; transform: translateY(-3px); box-shadow: 0 14px 34px rgba(37, 211, 102, 0.4); }
.wa-icon { width: 24px; height: 24px; object-fit: contain; }

/* Floating WhatsApp button (icon already includes green bubble) */
.wa-float {
    position: fixed;
    bottom: 88px; right: 28px;
    width: 58px; height: 58px;
    display: grid; place-items: center;
    border-radius: 50%;
    z-index: 900;
    transition: transform 0.35s var(--ease), filter 0.35s var(--ease);
    filter: drop-shadow(0 8px 20px rgba(37, 211, 102, 0.5));
    animation: waPulse 2.4s ease-in-out infinite;
}
.wa-float img { width: 100%; height: 100%; object-fit: contain; display: block; }
.wa-float:hover { transform: translateY(-4px) scale(1.06); filter: drop-shadow(0 12px 26px rgba(37, 211, 102, 0.7)); }
@keyframes waPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.06); }
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer { background: var(--navy-900); color: rgba(255,255,255,0.7); padding-top: 70px; }
.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.4fr;
    gap: 40px;
    padding-bottom: 50px;
}
.footer-brand .brand-text { flex-direction: column; }
.footer-brand { display: flex; flex-direction: column; align-items: flex-start; gap: 2px; }
.footer-brand .brand-mark { color: var(--gold); }
.footer-logo { height: 64px; width: auto; display: block; }
.footer-brand .brand-sub { font-size: 0.6rem; letter-spacing: 0.6em; color: var(--gold-light); padding-left: 0.6em; margin-top: -2px; }
.footer-tag { margin-top: 14px; font-size: 0.9rem; font-weight: 300; max-width: 240px; }
.footer-web { display: inline-block; margin-top: 12px; color: var(--gold-light); font-size: 0.9rem; font-weight: 500; letter-spacing: 0.02em; transition: color 0.3s; }
.footer-web:hover { color: var(--gold); }
.footer-links h4, .footer-contact h4 {
    color: var(--white);
    font-size: 1rem;
    margin-bottom: 18px;
    letter-spacing: 0.03em;
}
.footer-links a, .footer-contact a {
    display: block;
    color: rgba(255,255,255,0.65);
    font-size: 0.92rem;
    margin-bottom: 11px;
    transition: color 0.3s, padding-left 0.3s;
}
.footer-links a:hover, .footer-contact a:hover { color: var(--gold-light); padding-left: 5px; }
.footer-contact p { font-size: 0.92rem; margin-bottom: 16px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding: 22px 0; }
.footer-bottom .container { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }
.footer-bottom p { font-size: 0.85rem; color: rgba(255,255,255,0.5); }

/* ---------- Back to top ---------- */
.to-top {
    position: fixed;
    bottom: 28px; right: 28px;
    width: 48px; height: 48px;
    display: grid; place-items: center;
    background: linear-gradient(135deg, var(--gold-light), var(--gold));
    color: var(--navy-900);
    border-radius: 50%;
    font-size: 1.2rem;
    font-weight: 700;
    box-shadow: var(--shadow-gold);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: 0.4s var(--ease);
    z-index: 900;
}
.to-top.show { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { transform: translateY(-4px); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
    .about-grid, .quality-grid, .contact-grid { grid-template-columns: 1fr; gap: 44px; }
    .do-grid, .product-grid { grid-template-columns: repeat(2, 1fr); }
    .why-grid { grid-template-columns: repeat(2, 1fr); }
    .timeline { grid-template-columns: repeat(2, 1fr); gap: 40px 20px; }
    .timeline::before { display: none; }
    .hero-features { grid-template-columns: repeat(2, 1fr); gap: 16px 8px; }
    .feature:nth-child(2)::after { display: none; }
    .about-media { max-width: 520px; }
}

@media (max-width: 860px) {
    .main-nav, .nav-cta { display: none; }
    .nav-toggle { display: flex; margin-left: auto; }
    .main-nav.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%; left: 0; right: 0;
        background: rgba(11,20,36,0.98);
        backdrop-filter: blur(12px);
        padding: 24px;
        gap: 6px;
        border-top: 1px solid var(--line);
        box-shadow: var(--shadow-md);
    }
    .main-nav.open a { padding: 12px 4px; font-size: 1rem; border-bottom: 1px solid rgba(255,255,255,0.06); }
}

@media (max-width: 640px) {
    .section { padding: 70px 0; }
    .do-grid, .product-grid, .why-grid { grid-template-columns: 1fr; }
    .quality-stats { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .hero-features { grid-template-columns: 1fr; }
    .feature::after { display: none !important; }
    .feature { border-bottom: 1px solid rgba(201,154,63,0.18); padding-bottom: 14px; }
    .feature:last-child { border-bottom: none; }
    .hero-actions { flex-direction: column; align-items: stretch; }
    .btn { justify-content: center; }
    .about-badge { right: 10px; bottom: -20px; padding: 14px 18px; }
    .commit-tags { font-size: 1.05rem; }
    .testi-card { padding: 40px 26px; }
    .contact-form { padding: 30px 22px; }
}

@media (max-width: 420px) {
    .footer-grid { grid-template-columns: 1fr; }
    .quality-stats { grid-template-columns: 1fr; }
    .brand-name { font-size: 1.15rem; letter-spacing: 0.2em; }
}