@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@300;400;500;600;700;800&display=swap');

/* --- DESIGN SYSTEM TOKENS --- */
:root {
    /* =====================================================
       PREMIUM INDUSTRIAL METALLIC PALETTE
       Brushed-steel silver + champagne-brass accent on a
       refined graphite base. Evokes aluminium & stainless
       cladding — engineered, premium, trustworthy.
       ===================================================== */

    /* Deep graphite base */
    --bg-obsidian: #0b0d0f;
    --bg-base: #0b0d0f;
    --bg-card: #14171b;
    --bg-card-hover: #1b1f25;
    --bg-deep: #070809;
    --border-color: rgba(255, 255, 255, 0.08);
    --border-color-hover: rgba(198, 154, 76, 0.35); /* edges catch brass light */

    /* Text — tuned for WCAG AA contrast on dark */
    --text-primary: #f5f7fa;
    --text-secondary: #b8c2ce;   /* brighter than before for readability */
    --text-muted: #828d9b;

    /* Champagne brass — primary accent, CTAs, highlights */
    --accent-brass: #c69a4c;
    --accent-brass-hover: #d9ae5e;
    --accent-brass-soft: rgba(198, 154, 76, 0.12);
    --accent-brass-border: rgba(198, 154, 76, 0.30);
    --on-accent: #16110a;        /* dark ink for text on brass */

    /* Brushed steel — secondary metallic */
    --accent-steel: #56646f;
    --accent-silver: #cdd8e2;
    --accent-steel-light: #cdd8e2;

    /* Legacy aliases (old "gold" names now correctly map to brass) */
    --accent-gold: var(--accent-brass);
    --accent-gold-hover: var(--accent-brass-hover);

    /* Font Families */
    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

    /* Shadows & Glows — warm brass */
    --glow-gold: 0 0 30px rgba(198, 154, 76, 0.14);
    --glow-gold-intense: 0 0 44px rgba(198, 154, 76, 0.30);
    --glow-brass: 0 0 30px rgba(198, 154, 76, 0.14);
    --shadow-premium: 0 24px 48px -18px rgba(0, 0, 0, 0.75);

    /* Transitions */
    --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-fast: all 0.2s ease;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    background-color: var(--bg-obsidian);
    color: var(--text-primary);
    overflow-x: hidden;
}

body {
    font-family: var(--font-body);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

p {
    color: var(--text-secondary);
    font-weight: 300;
}

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

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

/* --- SCROLLBAR --- */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-obsidian);
}
::-webkit-scrollbar-thumb {
    background: var(--bg-card);
    border: 2px solid var(--bg-obsidian);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--accent-steel);
}

/* --- BRANDED SELECTION & ACCESSIBLE FOCUS --- */
::selection {
    background: rgba(198, 154, 76, 0.85);
    color: var(--on-accent);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
.btn:focus-visible,
.select-card:focus-visible {
    outline: 2px solid var(--accent-brass);
    outline-offset: 3px;
    border-radius: 4px;
}

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* --- LAYOUT UTILITIES --- */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
    position: relative;
}

.section-padding {
    padding: 8rem 0;
}

.flex-center {
    display: flex;
    justify-content: center;
    align-items: center;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 4rem;
    align-items: center;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2.5rem;
}

/* --- TYPOGRAPHY STYLES --- */
.text-gradient {
    /* Brushed-metal sheen: bright steel into champagne brass */
    background: linear-gradient(118deg, #ffffff 0%, #cdd8e2 30%, #c69a4c 72%, #b8893f 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}

.text-gold {
    color: var(--accent-gold);
}

.badge {
    display: inline-block;
    padding: 0.5rem 1.25rem;
    background: var(--accent-brass-soft);
    border: 1px solid var(--accent-brass-border);
    color: var(--accent-brass);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    border-radius: 100px;
    margin-bottom: 1.5rem;
}

.section-title {
    font-size: 2.75rem;
    margin-bottom: 1.25rem;
}

.section-desc {
    font-size: 1.15rem;
    max-width: 600px;
    margin-bottom: 3.5rem;
}

/* --- BUTTONS --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.85rem 2rem;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
    gap: 0.75rem;
}

.btn-primary {
    background: linear-gradient(180deg, var(--accent-brass-hover), var(--accent-brass));
    color: var(--on-accent);
    border: 1px solid var(--accent-brass);
    box-shadow: var(--glow-gold);
    font-weight: 700;
}

.btn-primary:hover {
    background: linear-gradient(180deg, #e6bd72, var(--accent-brass-hover));
    box-shadow: var(--glow-gold-intense);
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color-hover);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.03);
    border-color: var(--accent-gold);
    transform: translateY(-2px);
}

/* --- HEADER --- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(8, 9, 10, 0.75);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition-smooth);
}

.header-scrolled {
    background: rgba(8, 9, 10, 0.9);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    padding: 0.5rem 0;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.03em;
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    background: linear-gradient(135deg, var(--accent-silver), var(--accent-gold));
    border-radius: 8px;
    font-weight: 900;
    color: #ffffff;
    font-size: 1.15rem;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    list-style: none;
}

.nav-links a {
    font-family: var(--font-heading);
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text-secondary);
    position: relative;
    padding: 0.5rem 0;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-gold);
    transition: var(--transition-smooth);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

/* Mobile menu toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    z-index: 1001;
}

.menu-toggle span {
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--text-primary);
    transition: var(--transition-fast);
}

/* --- HERO SECTION --- */
.hero {
    position: relative;
    min-height: 100vh;
    padding-top: 120px;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
}

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.25;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: radial-gradient(circle at 60% 40%, rgba(8, 9, 10, 0.4) 0%, rgba(8, 9, 10, 0.95) 80%);
}

.hero-content {
    max-width: 700px;
}

.hero h1 {
    font-size: 4rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
}

.hero-stats {
    display: flex;
    gap: 3rem;
    margin-top: 4.5rem;
    border-top: 1px solid var(--border-color);
    padding-top: 2.5rem;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-num {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent-gold);
    line-height: 1;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 0.5rem;
}

/* --- PAIN POINTS --- */
.pain-points {
    position: relative;
    background: linear-gradient(to bottom, var(--bg-obsidian), #0b0d11);
}

.pain-grid {
    margin-top: 1.5rem;
}

.pain-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 3rem 2.5rem;
    border-radius: 12px;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.pain-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, transparent, rgba(239, 68, 68, 0.5), transparent); /* Subtle warning red on hover */
    opacity: 0;
    transition: var(--transition-smooth);
}

.pain-card:hover {
    transform: translateY(-5px);
    border-color: rgba(239, 68, 68, 0.2);
    box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.6);
}

.pain-card:hover::before {
    opacity: 1;
}

.pain-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    border-radius: 12px;
    background: rgba(226, 86, 63, 0.10);
    border: 1px solid rgba(226, 86, 63, 0.22);
    color: #e2563f; /* refined alert tone */
    margin-bottom: 1.5rem;
}

.pain-icon svg {
    width: 28px;
    height: 28px;
}

/* Reusable premium icon tile (brass) */
.icon-tile {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    border-radius: 12px;
    background: var(--accent-brass-soft);
    border: 1px solid var(--accent-brass-border);
    color: var(--accent-brass);
    margin-bottom: 1.5rem;
}

.icon-tile svg {
    width: 28px;
    height: 28px;
}

.pain-card h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
}

/* --- SOLUTION REVEAL --- */
.solution-reveal {
    background: #0b0d11;
    position: relative;
}

.solution-showcase {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    aspect-ratio: 16/10;
}

.solution-showcase img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-smooth);
}

.solution-showcase:hover img {
    transform: scale(1.03);
}

.solution-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 3rem;
    background: linear-gradient(to top, rgba(8, 9, 10, 0.95) 0%, rgba(8, 9, 10, 0.5) 60%, transparent 100%);
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
}

/* --- SERVICES & FEATURES --- */
.service-details {
    background: var(--bg-obsidian);
}

.service-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    transition: var(--transition-smooth);
}

.service-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-brass-border);
    box-shadow: var(--glow-gold);
}

.service-img {
    height: 260px;
    overflow: hidden;
    position: relative;
}

.service-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-smooth);
}

.service-card:hover .service-img img {
    transform: scale(1.05);
}

.service-info {
    padding: 2.5rem;
}

.service-info h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.service-features {
    list-style: none;
    margin: 1.5rem 0 2rem 0;
}

.service-features li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.service-features li::before {
    content: "✓";
    color: var(--accent-gold);
    font-weight: bold;
}

/* --- SPECIFICATIONS TABLE --- */
.specs-section {
    background: #0b0d11;
}

.specs-table-wrapper {
    overflow-x: auto;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    background: var(--bg-card);
}

.specs-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    min-width: 800px;
}

.specs-table th {
    background: rgba(255, 255, 255, 0.02);
    padding: 1.25rem 2rem;
    font-family: var(--font-heading);
    font-weight: 600;
    border-bottom: 1px solid var(--border-color);
    color: var(--accent-gold);
}

.specs-table td {
    padding: 1.25rem 2rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.specs-table tr:last-child td {
    border-bottom: none;
}

.specs-table tr:hover {
    background: rgba(255, 255, 255, 0.01);
}

/* --- SOCIAL PROOF & PROJECTS --- */
.social-proof {
    background: var(--bg-obsidian);
}

.project-carousel {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2.5rem;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    position: relative;
    transition: var(--transition-smooth);
}

.project-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-gold);
}

.project-img {
    height: 240px;
    position: relative;
    overflow: hidden;
}

.project-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.project-img::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, transparent 30%, rgba(8, 9, 10, 0.9));
}

.project-location {
    position: absolute;
    bottom: 1.5rem;
    left: 1.5rem;
    z-index: 10;
    font-family: var(--font-heading);
    font-size: 0.8rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    background: var(--accent-brass);
    color: var(--on-accent);
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-weight: 700;
}

.project-body {
    padding: 2rem;
}

.project-body h4 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

.testimonial-quote {
    font-style: italic;
    color: var(--text-secondary);
    margin-top: 1.5rem;
    padding-left: 1rem;
    border-left: 2px solid var(--accent-gold);
    font-size: 0.9rem;
}

/* --- ESTIMATOR & CONTACT --- */
.contact-section {
    background: linear-gradient(to top, var(--bg-obsidian), #0b0d11);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 4rem;
}

/* Estimator Form */
.estimator-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 3.5rem;
    border-radius: 16px;
    box-shadow: var(--shadow-premium);
}

.form-step {
    display: none;
}

.form-step.active {
    display: block;
    animation: fadeIn 0.4s ease-in-out;
}

.step-indicator {
    display: flex;
    justify-content: space-between;
    margin-bottom: 3rem;
    position: relative;
}

.step-indicator::before {
    content: '';
    position: absolute;
    top: 15px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--border-color);
    z-index: 1;
}

.step-dot {
    width: 32px;
    height: 32px;
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 700;
    z-index: 2;
    transition: var(--transition-smooth);
}

.step-dot.active {
    border-color: var(--accent-gold);
    color: var(--accent-gold);
    box-shadow: var(--glow-gold);
}

.step-dot.completed {
    background: var(--accent-brass);
    border-color: var(--accent-brass);
    color: var(--on-accent);
}

.form-group {
    margin-bottom: 2rem;
}

.form-group label {
    display: block;
    font-family: var(--font-heading);
    font-weight: 500;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.input-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1.5rem;
}

.select-card {
    border: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.02);
    padding: 1.5rem;
    border-radius: 8px;
    cursor: pointer;
    text-align: center;
    transition: var(--transition-fast);
}

.select-card:hover {
    border-color: var(--border-color-hover);
    background: rgba(255, 255, 255, 0.04);
}

.select-card.selected {
    border-color: var(--accent-brass);
    background: var(--accent-brass-soft);
}

.select-card input[type="radio"] {
    display: none;
}

.select-card-title {
    font-weight: 600;
    color: var(--text-primary);
    margin-top: 0.5rem;
}

.form-input {
    width: 100%;
    padding: 1rem 1.25rem;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: var(--transition-fast);
}

.form-input:focus {
    outline: none;
    border-color: var(--accent-gold);
    background: rgba(255, 255, 255, 0.04);
}

.form-navigation {
    display: flex;
    justify-content: space-between;
    margin-top: 3rem;
}

/* Summary screen */
.summary-box {
    background: rgba(255, 255, 255, 0.01);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.summary-item {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
}

.summary-item:last-child {
    border-bottom: none;
}

/* Contact Sidebar */
.contact-info-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.office-info {
    margin-bottom: 3rem;
}

.office-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 2rem;
    border-radius: 12px;
    margin-bottom: 1.5rem;
}

.office-card h4 {
    color: var(--accent-gold);
    font-size: 1.2rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.office-details p {
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
}

/* --- FOOTER --- */
.footer {
    background: #050607;
    border-top: 1px solid var(--border-color);
    padding: 5rem 0 2.5rem 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr repeat(3, 1fr);
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-brand p {
    margin-top: 1.5rem;
    font-size: 0.95rem;
}

.footer-links h4 {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.footer-links ul {
    list-style: none;
}

.footer-links ul li {
    margin-bottom: 0.75rem;
}

.footer-links ul li a {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.footer-links ul li a:hover {
    color: var(--accent-gold);
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* --- ABOUT PAGE SPECIFIC --- */
.about-hero {
    min-height: 60vh;
    padding-top: 140px;
    background: linear-gradient(to bottom, rgba(8, 9, 10, 0.9) 0%, var(--bg-obsidian) 100%);
    position: relative;
    display: flex;
    align-items: center;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2.5rem;
    margin-top: 4rem;
}

.value-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 3rem 2rem;
    border-radius: 12px;
    transition: var(--transition-smooth);
}

.value-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-gold);
}

.value-number {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent-gold);
    opacity: 0.3;
    margin-bottom: 1rem;
}

.value-card h3 {
    font-size: 1.35rem;
    margin-bottom: 1rem;
}

/* --- ANIMATIONS --- */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in-up {
    animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* --- RESPONSIVE MEDIA QUERIES --- */
@media (max-width: 1024px) {
    .grid-3, .project-carousel, .values-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 1.5rem;
    }
    .section-padding {
        padding: 5rem 0;
    }
    .grid-2, .grid-3, .project-carousel, .values-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
    .hero h1 {
        font-size: 2.75rem;
    }
    .hero-stats {
        flex-direction: column;
        gap: 1.5rem;
    }
    .menu-toggle {
        display: flex;
    }
    .nav-links {
        position: fixed;
        top: 80px;
        left: 0;
        width: 100%;
        height: calc(100vh - 80px);
        background: var(--bg-obsidian);
        flex-direction: column;
        align-items: center;
        padding-top: 4rem;
        gap: 2.5rem;
        transform: translateY(-100%);
        transition: var(--transition-smooth);
        z-index: 999;
    }
    .nav-links.active {
        transform: translateY(0);
    }
    .nav-actions {
        display: none;
    }
    .input-grid {
        grid-template-columns: 1fr;
    }
    .estimator-card {
        padding: 2rem;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
}

/* Floating WhatsApp Button */
.whatsapp-float {
    position: fixed;
    width: 60px;
    height: 60px;
    bottom: 30px;
    right: 30px;
    background-color: #25d366;
    color: #fff;
    border-radius: 50px;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
    z-index: 9999;
    transition: all 0.3s ease;
}

.whatsapp-float:hover {
    background-color: #20ba5a;
    transform: scale(1.1) translateY(-5px);
    box-shadow: 0 8px 25px rgba(37, 211, 102, 0.6);
}

.whatsapp-float svg {
    filter: drop-shadow(0 2px 5px rgba(0,0,0,0.15));
}