/* ============================================
   Volts Pro Electric — Classic & Elegant Style
   Teal + Slate Grey Palette
   ============================================ */

/* ---------- CSS Custom Properties ---------- */
:root {
    --color-teal-50: #f0fdfa;
    --color-teal-100: #ccfbf1;
    --color-teal-200: #99f6e4;
    --color-teal-500: #14b8a6;
    --color-teal-600: #0d9488;
    --color-teal-700: #0f766e;
    --color-teal-800: #115e59;
    --color-teal-900: #134e4a;

    --color-slate-50: #f8fafc;
    --color-slate-100: #f1f5f9;
    --color-slate-200: #e2e8f0;
    --color-slate-300: #cbd5e1;
    --color-slate-400: #94a3b8;
    --color-slate-500: #64748b;
    --color-slate-600: #475569;
    --color-slate-700: #334155;
    --color-slate-800: #1e293b;
    --color-slate-900: #0f172a;

    --color-white: #ffffff;
    --color-black: #000000;

    --font-serif: 'Playfair Display', Georgia, 'Times New Roman', serif;
    --font-sans: 'Lato', 'Helvetica Neue', Arial, sans-serif;

    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.07), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.06);

    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-slate-700);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    color: var(--color-teal-700);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--color-teal-600);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ---------- Typography ---------- */
h1, h2, h3, h4 {
    font-family: var(--font-serif);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-slate-900);
}

/* ---------- Header ---------- */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-slate-100);
    transition: var(--transition);
}

.site-header.scrolled {
    box-shadow: var(--shadow-md);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--color-slate-900);
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--color-teal-700);
    border-radius: var(--radius-sm);
    color: var(--color-white);
}

.logo-text {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

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

.main-nav a:not(.btn) {
    font-size: 0.9375rem;
    font-weight: 400;
    color: var(--color-slate-600);
    position: relative;
}

.main-nav a:not(.btn)::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-teal-600);
    transition: var(--transition);
}

.main-nav a:not(.btn):hover {
    color: var(--color-teal-700);
}

.main-nav a:not(.btn):hover::after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-slate-700);
    padding: 8px;
}

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    font-weight: 700;
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--color-teal-700);
    color: var(--color-white);
    border-color: var(--color-teal-700);
}

.btn-primary:hover {
    background: var(--color-teal-800);
    border-color: var(--color-teal-800);
    color: var(--color-white);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.btn-outline {
    background: transparent;
    color: var(--color-slate-700);
    border-color: var(--color-slate-300);
}

.btn-outline:hover {
    border-color: var(--color-teal-600);
    color: var(--color-teal-700);
    transform: translateY(-1px);
}

.btn-small {
    padding: 8px 18px;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 16px 32px;
    font-size: 1rem;
}

.btn-full {
    width: 100%;
    justify-content: center;
}

.btn-block {
    width: 100%;
    justify-content: center;
}

/* ---------- Hero Section ---------- */
.hero {
    padding-top: 72px;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--color-slate-50) 0%, var(--color-white) 50%, var(--color-teal-50) 100%);
    overflow: hidden;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    padding: 60px 0;
}

.hero-content {
    max-width: 560px;
}

.hero-eyebrow {
    display: inline-block;
    font-family: var(--font-sans);
    font-size: 0.8125rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-teal-700);
    margin-bottom: 20px;
    position: relative;
    padding-left: 40px;
}

.hero-eyebrow::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 28px;
    height: 2px;
    background: var(--color-teal-600);
}

.hero-headline {
    font-size: clamp(2.25rem, 4.5vw, 3.5rem);
    font-weight: 700;
    line-height: 1.1;
    color: var(--color-slate-900);
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.hero-headline em {
    font-style: italic;
    color: var(--color-teal-700);
}

.hero-subheadline {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--color-slate-500);
    margin-bottom: 36px;
    max-width: 480px;
}

.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 48px;
}

.hero-trust {
    display: flex;
    align-items: center;
    gap: 24px;
}

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

.trust-value {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-slate-900);
    line-height: 1;
}

.trust-label {
    font-size: 0.8125rem;
    color: var(--color-slate-500);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-top: 4px;
}

.trust-divider {
    width: 1px;
    height: 40px;
    background: var(--color-slate-200);
}

/* Hero Visual */
.hero-visual {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.hero-image-main {
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    max-width: 480px;
}

.hero-image-main img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-image-accent {
    position: absolute;
    bottom: -30px;
    left: -40px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    border: 4px solid var(--color-white);
    max-width: 280px;
}

.hero-image-accent img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-badge {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 24px;
    padding: 14px 20px;
    background: var(--color-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-slate-700);
}

.hero-badge svg {
    color: var(--color-teal-600);
    flex-shrink: 0;
}

/* ---------- Section Shared ---------- */
.section-header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 64px;
}

.section-eyebrow {
    display: inline-block;
    font-family: var(--font-sans);
    font-size: 0.8125rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-teal-700);
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 1.0625rem;
    color: var(--color-slate-500);
    line-height: 1.8;
}

/* ---------- Services ---------- */
.services {
    padding: 100px 0;
    background: var(--color-white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.service-card {
    padding: 36px 28px;
    background: var(--color-slate-50);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-slate-100);
    transition: var(--transition);
}

.service-card:hover {
    background: var(--color-white);
    border-color: var(--color-teal-200);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.service-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-teal-700);
    border-radius: var(--radius-md);
    color: var(--color-white);
    margin-bottom: 20px;
}

.service-card h3 {
    font-size: 1.1875rem;
    margin-bottom: 12px;
    color: var(--color-slate-800);
}

.service-card p {
    font-size: 0.9375rem;
    color: var(--color-slate-500);
    line-height: 1.7;
}

/* ---------- About ---------- */
.about {
    padding: 100px 0;
    background: var(--color-slate-50);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-visual {
    position: relative;
}

.about-image-wrapper {
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.about-image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.about-stats {
    position: absolute;
    bottom: -24px;
    right: -24px;
    display: flex;
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
}

.stat-item {
    padding: 24px 28px;
    text-align: center;
}

.stat-number {
    display: block;
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-teal-700);
    line-height: 1;
}

.stat-label {
    display: block;
    font-size: 0.75rem;
    color: var(--color-slate-500);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-top: 6px;
}

.stat-divider {
    width: 1px;
    background: var(--color-slate-100);
}

.about-content {
    max-width: 480px;
}

.about-content .section-eyebrow {
    text-align: left;
}

.about-content .section-title {
    text-align: left;
    margin-bottom: 24px;
}

.about-text {
    font-size: 1rem;
    color: var(--color-slate-500);
    line-height: 1.85;
    margin-bottom: 16px;
}

.about-values {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 32px;
}

.value-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--color-slate-700);
}

.value-item svg {
    color: var(--color-teal-600);
    flex-shrink: 0;
}

/* ---------- Why Us ---------- */
.why-us {
    padding: 100px 0;
    background: var(--color-teal-900);
    color: var(--color-white);
}

.why-us-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.why-us-content .section-eyebrow {
    color: var(--color-teal-200);
}

.why-us-content .section-title {
    color: var(--color-white);
    margin-bottom: 20px;
}

.why-us-content .section-subtitle {
    color: var(--color-teal-200);
    margin-bottom: 48px;
}

.why-list {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.why-item {
    display: flex;
    gap: 24px;
}

.why-number {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-teal-600);
    line-height: 1;
    flex-shrink: 0;
    opacity: 0.7;
}

.why-text h4 {
    font-size: 1.125rem;
    color: var(--color-white);
    margin-bottom: 8px;
}

.why-text p {
    font-size: 0.9375rem;
    color: var(--color-teal-200);
    line-height: 1.7;
}

.why-us-visual {
    position: relative;
}

.why-image-stack {
    position: relative;
}

.why-image-stack img {
    width: 100%;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
}

.why-quote-card {
    position: absolute;
    bottom: -20px;
    left: -20px;
    right: -20px;
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 28px 32px;
    box-shadow: var(--shadow-xl);
}

.why-quote-card svg {
    margin-bottom: 12px;
}

.why-quote-card p {
    font-family: var(--font-serif);
    font-size: 1.0625rem;
    font-style: italic;
    color: var(--color-slate-700);
    line-height: 1.7;
    margin-bottom: 12px;
}

.why-quote-card span {
    font-family: var(--font-sans);
    font-size: 0.8125rem;
    font-style: normal;
    color: var(--color-slate-400);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

/* ---------- Contact ---------- */
.contact {
    padding: 100px 0;
    background: var(--color-white);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
}

.contact-info {
    max-width: 480px;
}

.contact-info .section-eyebrow {
    text-align: left;
}

.contact-info .section-title {
    text-align: left;
    margin-bottom: 20px;
}

.contact-intro {
    font-size: 1rem;
    color: var(--color-slate-500);
    line-height: 1.85;
    margin-bottom: 40px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-bottom: 36px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    text-decoration: none;
    color: inherit;
}

.contact-item:hover {
    color: var(--color-teal-700);
}

.contact-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-teal-50);
    border-radius: var(--radius-md);
    color: var(--color-teal-700);
    flex-shrink: 0;
}

.contact-label {
    display: block;
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-slate-400);
    margin-bottom: 4px;
}

.contact-value {
    display: block;
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-slate-700);
    line-height: 1.5;
}

/* Contact Form */
.contact-form-wrapper {
    background: var(--color-slate-50);
    border-radius: var(--radius-xl);
    padding: 40px;
    border: 1px solid var(--color-slate-100);
}

.contact-form h3 {
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.form-note {
    font-size: 0.875rem;
    color: var(--color-slate-400);
    margin-bottom: 28px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-slate-700);
    margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    color: var(--color-slate-700);
    background: var(--color-white);
    border: 1.5px solid var(--color-slate-200);
    border-radius: var(--radius-md);
    transition: var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--color-teal-500);
    box-shadow: 0 0 0 3px rgba(20, 184, 166, 0.15);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-slate-300);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-success {
    display: none;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    background: var(--color-teal-50);
    border: 1px solid var(--color-teal-200);
    border-radius: var(--radius-md);
    margin-top: 20px;
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--color-teal-800);
}

.form-success svg {
    color: var(--color-teal-600);
    flex-shrink: 0;
}

/* ---------- Footer ---------- */
.site-footer {
    background: var(--color-slate-900);
    color: var(--color-slate-400);
    padding: 64px 0 32px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.logo-light .logo-icon {
    background: var(--color-teal-600);
}

.logo-light .logo-text {
    color: var(--color-white);
}

.footer-brand p {
    font-size: 0.9375rem;
    line-height: 1.7;
    margin-top: 16px;
    max-width: 300px;
}

.footer-links h4,
.footer-contact h4 {
    font-family: var(--font-sans);
    font-size: 0.8125rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-white);
    margin-bottom: 20px;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    color: var(--color-slate-400);
    font-size: 0.9375rem;
}

.footer-links a:hover {
    color: var(--color-teal-400);
}

.footer-contact p {
    font-size: 0.9375rem;
    line-height: 1.7;
    margin-bottom: 8px;
}

.footer-contact a {
    color: var(--color-teal-400);
    font-weight: 600;
}

.footer-contact a:hover {
    color: var(--color-teal-300);
}

.footer-bottom {
    border-top: 1px solid var(--color-slate-800);
    padding-top: 24px;
    text-align: center;
    font-size: 0.875rem;
    color: var(--color-slate-500);
}

/* ---------- Scroll Reveal (progressive enhancement) ---------- */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(24px);
        transition: opacity 0.6s ease, transform 0.6s ease;
    }

    .reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
    .hero-grid {
        gap: 40px;
    }

    .about-grid,
    .why-us-layout,
    .contact-grid {
        gap: 48px;
    }

    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .main-nav {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--color-white);
        flex-direction: column;
        padding: 24px;
        gap: 20px;
        border-bottom: 1px solid var(--color-slate-100);
        box-shadow: var(--shadow-lg);
        transform: translateY(-120%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }

    .main-nav.open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .main-nav a:not(.btn) {
        font-size: 1.0625rem;
    }

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

    /* Hero */
    .hero {
        padding-top: 72px;
    }

    .hero-grid {
        grid-template-columns: 1fr;
        gap: 48px;
        padding: 40px 0;
    }

    .hero-content {
        max-width: 100%;
        text-align: center;
    }

    .hero-eyebrow {
        padding-left: 0;
    }

    .hero-eyebrow::before {
        display: none;
    }

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

    .hero-cta {
        justify-content: center;
    }

    .hero-trust {
        justify-content: center;
    }

    .hero-visual {
        align-items: center;
        max-width: 480px;
        margin: 0 auto;
    }

    .hero-image-accent {
        left: 0;
        bottom: -20px;
    }

    /* Services */
    .services {
        padding: 64px 0;
    }

    .services-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .service-card {
        padding: 28px 24px;
    }

    /* About */
    .about {
        padding: 64px 0;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .about-visual {
        max-width: 480px;
        margin: 0 auto;
    }

    .about-stats {
        right: 0;
        bottom: -16px;
    }

    .about-content {
        max-width: 100%;
    }

    .about-content .section-eyebrow,
    .about-content .section-title {
        text-align: center;
    }

    .about-text {
        text-align: center;
    }

    .about-values {
        justify-items: center;
    }

    /* Why Us */
    .why-us {
        padding: 64px 0;
    }

    .why-us-layout {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .why-us-content .section-eyebrow,
    .why-us-content .section-title {
        text-align: center;
    }

    .why-us-content .section-subtitle {
        text-align: center;
    }

    .why-quote-card {
        left: 0;
        right: 0;
        bottom: -16px;
    }

    /* Contact */
    .contact {
        padding: 64px 0;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .contact-info {
        max-width: 100%;
    }

    .contact-info .section-eyebrow,
    .contact-info .section-title {
        text-align: center;
    }

    .contact-intro {
        text-align: center;
    }

    .contact-form-wrapper {
        padding: 28px;
    }

    /* Footer */
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
        text-align: center;
    }

    .footer-brand p {
        max-width: 100%;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero-headline {
        font-size: 1.875rem;
    }

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

    .hero-cta .btn {
        width: 100%;
        justify-content: center;
    }

    .hero-trust {
        flex-direction: column;
        gap: 16px;
    }

    .trust-divider {
        width: 40px;
        height: 1px;
    }

    .about-stats {
        flex-direction: column;
    }

    .stat-divider {
        width: 100%;
        height: 1px;
    }

    .about-values {
        grid-template-columns: 1fr;
    }

    .why-number {
        font-size: 1.75rem;
    }
}