/* ============================================
   KELLER INSTRUMENT REPAIR — STYLESHEET
   Teal + Slate Grey | Confident Corporate
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
    --teal-50: #f0fdfa;
    --teal-100: #ccfbf1;
    --teal-200: #99f6e4;
    --teal-300: #5eead4;
    --teal-400: #2dd4bf;
    --teal-500: #14b8a6;
    --teal-600: #0d9488;
    --teal-700: #0f766e;
    --teal-800: #115e59;
    --teal-900: #134e4a;
    
    --slate-50: #f8fafc;
    --slate-100: #f1f5f9;
    --slate-200: #e2e8f0;
    --slate-300: #cbd5e1;
    --slate-400: #94a3b8;
    --slate-500: #64748b;
    --slate-600: #475569;
    --slate-700: #334155;
    --slate-800: #1e293b;
    --slate-900: #0f172a;
    
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-heading: 'Merriweather', Georgia, serif;
    
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.08), 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, 0.05);
    
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    color: var(--slate-800);
    background: var(--slate-50);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    color: var(--teal-600);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--teal-700);
}

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

/* --- Navigation --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--slate-200);
    transition: box-shadow var(--transition);
}

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

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--slate-900);
    font-weight: 600;
    font-size: 1.05rem;
}

.logo-text {
    letter-spacing: -0.01em;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 4px;
    list-style: none;
}

.nav-links a {
    color: var(--slate-600);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition);
}

.nav-links a:hover {
    color: var(--teal-700);
    background: var(--teal-50);
}

.nav-cta {
    background: var(--teal-600) !important;
    color: white !important;
    border-radius: var(--radius-sm) !important;
    padding: 10px 20px !important;
    font-weight: 600 !important;
}

.nav-cta:hover {
    background: var(--teal-700) !important;
    color: white !important;
}

/* Hamburger */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}

.hamburger {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--slate-700);
    border-radius: 2px;
    transition: all var(--transition);
}

.nav-toggle[aria-expanded="true"] .hamburger:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle[aria-expanded="true"] .hamburger:nth-child(2) {
    opacity: 0;
}

.nav-toggle[aria-expanded="true"] .hamburger:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* --- Hero Section --- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: url('https://images.pexels.com/photos/36730409/pexels-photo-36730409.jpeg?auto=compress&cs=tinysrgb&fit=crop&w=1920&h=1080') center center / cover no-repeat;
    z-index: 0;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        135deg,
        rgba(15, 23, 42, 0.82) 0%,
        rgba(15, 23, 42, 0.65) 50%,
        rgba(13, 148, 136, 0.4) 100%
    );
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    padding: 120px 24px 80px;
    max-width: 760px;
}

.hero-greeting {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--teal-300);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: 20px;
}

.hero-headline {
    font-family: var(--font-heading);
    font-size: clamp(2.2rem, 5vw, 3.6rem);
    font-weight: 700;
    color: white;
    line-height: 1.2;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.hero-subheadline {
    font-size: 1.15rem;
    color: var(--slate-300);
    line-height: 1.7;
    margin-bottom: 40px;
    max-width: 600px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 56px;
}

.hero-trust {
    display: flex;
    flex-wrap: wrap;
    gap: 28px;
}

.trust-item {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--slate-300);
    font-size: 0.88rem;
    font-weight: 500;
}

.trust-item svg {
    color: var(--teal-400);
}

.hero-scroll {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--slate-400);
    font-size: 0.78rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    animation: float 2.5s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    font-family: var(--font-body);
    cursor: pointer;
    border: 2px solid transparent;
    transition: all var(--transition);
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--teal-600);
    color: white;
    border-color: var(--teal-600);
}

.btn-primary:hover {
    background: var(--teal-700);
    border-color: var(--teal-700);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: transparent;
    color: white;
    border-color: rgba(255, 255, 255, 0.4);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: white;
    color: white;
    transform: translateY(-2px);
}

.btn-outline-light {
    background: transparent;
    color: var(--teal-600);
    border-color: var(--teal-600);
}

.btn-outline-light:hover {
    background: var(--teal-600);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-large {
    padding: 18px 36px;
    font-size: 1.05rem;
}

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

/* --- Section Shared --- */
.section-header {
    text-align: center;
    max-width: 680px;
    margin: 0 auto 64px;
}

.section-tag {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--teal-600);
    margin-bottom: 12px;
}

.section-title {
    font-family: var(--font-heading);
    font-size: clamp(1.8rem, 3.5vw, 2.6rem);
    font-weight: 700;
    color: var(--slate-900);
    line-height: 1.25;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--slate-500);
    line-height: 1.7;
}

/* --- Services Section --- */
.services {
    padding: 100px 0;
    background: white;
}

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

.service-card {
    padding: 36px 28px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--slate-200);
    background: white;
    transition: all var(--transition);
}

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

.service-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--teal-50);
    border-radius: var(--radius-md);
    margin-bottom: 20px;
}

.service-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--slate-900);
    margin-bottom: 10px;
}

.service-card p {
    font-size: 0.92rem;
    color: var(--slate-500);
    line-height: 1.7;
}

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

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.about-image {
    position: relative;
}

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

.about-img-main img {
    width: 100%;
    height: 400px;
    object-fit: cover;
}

.about-img-accent {
    position: absolute;
    bottom: -32px;
    right: -24px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    border: 4px solid white;
}

.about-img-accent img {
    width: 100%;
    height: 160px;
    object-fit: cover;
}

.about-experience {
    position: absolute;
    top: -20px;
    left: -20px;
    background: var(--teal-600);
    color: white;
    padding: 20px 24px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 12px;
}

.exp-number {
    font-family: var(--font-heading);
    font-size: 2.4rem;
    font-weight: 700;
    line-height: 1;
}

.exp-text {
    font-size: 0.82rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    line-height: 1.3;
    opacity: 0.9;
}

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

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

.about-body {
    font-size: 1rem;
    color: var(--slate-600);
    line-height: 1.8;
    margin-bottom: 20px;
}

.about-stats {
    display: flex;
    gap: 40px;
    margin-top: 40px;
    padding-top: 32px;
    border-top: 1px solid var(--slate-200);
}

.stat {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--teal-600);
}

.stat-label {
    font-size: 0.82rem;
    color: var(--slate-500);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

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

.why-us .section-title {
    color: white;
}

.why-us .section-subtitle {
    color: var(--slate-400);
}

.why-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.why-card {
    padding: 40px 32px;
    border-radius: var(--radius-lg);
    background: var(--slate-800);
    border: 1px solid var(--slate-700);
    transition: all var(--transition);
}

.why-card:hover {
    border-color: var(--teal-600);
    transform: translateY(-4px);
    box-shadow: 0 0 40px rgba(13, 148, 136, 0.15);
}

.why-number {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 700;
    color: var(--teal-600);
    opacity: 0.4;
    line-height: 1;
    margin-bottom: 16px;
}

.why-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: white;
    margin-bottom: 12px;
}

.why-card p {
    font-size: 0.92rem;
    color: var(--slate-400);
    line-height: 1.7;
}

/* --- Testimonials --- */
.testimonials {
    padding: 100px 0;
    background: white;
}

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

.testimonial-card {
    padding: 36px 28px;
    border-radius: var(--radius-lg);
    background: var(--slate-50);
    border: 1px solid var(--slate-200);
    transition: all var(--transition);
}

.testimonial-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.testimonial-stars {
    display: flex;
    gap: 4px;
    margin-bottom: 20px;
}

.testimonial-text {
    font-size: 0.95rem;
    color: var(--slate-600);
    line-height: 1.8;
    margin-bottom: 24px;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.author-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--teal-600);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1rem;
}

.author-name {
    font-weight: 600;
    color: var(--slate-800);
    font-size: 0.92rem;
}

.author-location {
    font-size: 0.82rem;
    color: var(--slate-500);
}

/* --- CTA Section --- */
.cta {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--teal-700) 0%, var(--teal-600) 50%, var(--teal-500) 100%);
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.04);
}

.cta::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.04);
}

.cta-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.cta-title {
    font-family: var(--font-heading);
    font-size: clamp(1.8rem, 3.5vw, 2.6rem);
    font-weight: 700;
    color: white;
    line-height: 1.25;
    margin-bottom: 20px;
}

.cta-subtitle {
    font-size: 1.1rem;
    color: var(--teal-100);
    line-height: 1.7;
    margin-bottom: 40px;
}

.cta-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
}

/* --- Contact Section --- */
.contact {
    padding: 100px 0;
    background: var(--slate-50);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: start;
}

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

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

.contact-desc {
    font-size: 1rem;
    color: var(--slate-500);
    line-height: 1.7;
    margin-bottom: 40px;
}

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

.contact-item {
    display: flex;
    gap: 16px;
}

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

.contact-item strong {
    display: block;
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--slate-500);
    margin-bottom: 4px;
}

.contact-item p {
    font-size: 0.95rem;
    color: var(--slate-700);
    line-height: 1.6;
}

.contact-item a {
    color: var(--teal-600);
}

.contact-item a:hover {
    color: var(--teal-700);
    text-decoration: underline;
}

/* --- Form --- */
.contact-form-wrapper {
    background: white;
    padding: 40px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--slate-200);
}

.form-title {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--slate-900);
    margin-bottom: 28px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

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

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--slate-700);
    margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1.5px solid var(--slate-200);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-family: var(--font-body);
    color: var(--slate-800);
    background: var(--slate-50);
    transition: all var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--teal-500);
    background: white;
    box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--slate-400);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-success {
    display: none;
    text-align: center;
    padding: 40px 20px;
}

.form-success.show {
    display: block;
}

.form-success svg {
    margin: 0 auto 16px;
}

.form-success h4 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    color: var(--slate-900);
    margin-bottom: 8px;
}

.form-success p {
    color: var(--slate-500);
    font-size: 0.95rem;
}

/* --- Map Section --- */
.map-section {
    height: 350px;
    background: var(--slate-200);
}

.map-section iframe {
    filter: grayscale(30%);
    transition: filter var(--transition);
}

.map-section:hover iframe {
    filter: grayscale(0%);
}

/* --- Footer --- */
.footer {
    background: var(--slate-900);
    padding: 72px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 48px;
    padding-bottom: 56px;
}

.logo-light {
    color: white;
    margin-bottom: 16px;
}

.footer-brand p {
    font-size: 0.9rem;
    color: var(--slate-400);
    line-height: 1.7;
    max-width: 280px;
}

.footer-links h4,
.footer-contact h4 {
    font-size: 0.82rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--slate-300);
    margin-bottom: 20px;
}

.footer-links ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-links a {
    color: var(--slate-400);
    font-size: 0.9rem;
    transition: all var(--transition);
}

.footer-links a:hover {
    color: var(--teal-400);
    padding-left: 4px;
}

.footer-contact p {
    font-size: 0.9rem;
    color: var(--slate-400);
    line-height: 1.8;
}

.footer-contact a {
    color: var(--slate-400);
}

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

.footer-bottom {
    border-top: 1px solid var(--slate-800);
    padding: 24px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.footer-bottom p {
    font-size: 0.82rem;
    color: var(--slate-500);
}

/* --- Animations --- */
.fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .testimonials-grid .testimonial-card:last-child {
        grid-column: span 2;
        max-width: 50%;
        margin: 0 auto;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: white;
        flex-direction: column;
        align-items: flex-start;
        padding: 96px 32px 32px;
        gap: 8px;
        box-shadow: var(--shadow-xl);
        transition: right var(--transition);
    }
    
    .nav-links.open {
        right: 0;
    }
    
    .nav-links a {
        width: 100%;
        padding: 12px 16px;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-content {
        padding: 120px 24px 100px;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .hero-actions .btn {
        justify-content: center;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .about-img-accent {
        right: 0;
    }
    
    .about-experience {
        left: 0;
    }
    
    .about-content .section-tag,
    .about-content .section-title {
        text-align: center;
    }
    
    .about-stats {
        justify-content: center;
    }
    
    .why-grid {
        grid-template-columns: 1fr;
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .testimonials-grid .testimonial-card:last-child {
        grid-column: span 1;
        max-width: 100%;
    }
    
    .cta-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .contact-info .section-tag,
    .contact-info .section-title {
        text-align: center;
    }
    
    .contact-desc {
        text-align: center;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .contact-form-wrapper {
        padding: 28px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 36px;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .hero-greeting {
        font-size: 0.82rem;
    }
    
    .section-header {
        margin-bottom: 48px;
    }
    
    .services,
    .about,
    .why-us,
    .testimonials,
    .contact {
        padding: 72px 0;
    }
    
    .about-stats {
        flex-direction: column;
        gap: 20px;
        align-items: center;
    }
}