/* ============================================
   CASTILLO & SONS RADIATOR SERVICE
   Bold Editorial Style — Teal & Slate Grey
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
    --teal-900: #0D4F4F;
    --teal-800: #1A6B6B;
    --teal-700: #237A7A;
    --teal-600: #2D9191;
    --teal-500: #3AAFAF;
    --teal-400: #5EEAD4;
    --teal-300: #99F0E8;
    --teal-100: #E0F7F5;
    --teal-50: #F0FBF9;
    
    --slate-950: #0B1120;
    --slate-900: #0F1C2E;
    --slate-800: #1A2D45;
    --slate-700: #2A3F55;
    --slate-600: #3D5A78;
    --slate-500: #52799F;
    --slate-400: #84A9C0;
    --slate-300: #B0C9D9;
    --slate-200: #D4E4ED;
    --slate-100: #EDF4F8;
    --slate-50: #F6FAFC;
    
    --warm-100: #FAFAF8;
    --warm-200: #F2F2EE;
    --warm-300: #E8E8E2;
    
    --font-serif: 'Playfair Display', Georgia, 'Times New Roman', serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 20px;
    
    --shadow-sm: 0 1px 3px rgba(11, 17, 32, 0.08);
    --shadow-md: 0 4px 16px rgba(11, 17, 32, 0.10);
    --shadow-lg: 0 8px 32px rgba(11, 17, 32, 0.12);
    --shadow-xl: 0 16px 48px rgba(11, 17, 32, 0.14);
    
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    color: var(--slate-800);
    background-color: var(--warm-100);
    line-height: 1.6;
    overflow-x: hidden;
}

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

a {
    color: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
}

/* --- Typography --- */
h1, h2, h3, h4 {
    font-family: var(--font-serif);
    font-weight: 700;
    line-height: 1.15;
    color: var(--slate-900);
}

.section-eyebrow {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--teal-700);
    margin-bottom: var(--space-md);
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    line-height: 1.1;
    color: var(--slate-900);
    margin-bottom: var(--space-xl);
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 0.875rem 1.75rem;
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.btn-primary {
    background-color: var(--teal-800);
    color: #fff;
    border-color: var(--teal-800);
}

.btn-primary:hover {
    background-color: var(--teal-900);
    border-color: var(--teal-900);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background-color: transparent;
    color: var(--slate-800);
    border-color: var(--slate-300);
}

.btn-secondary:hover {
    border-color: var(--teal-700);
    color: var(--teal-800);
    transform: translateY(-2px);
}

.btn-light {
    background-color: #fff;
    color: var(--teal-900);
    border-color: #fff;
}

.btn-light:hover {
    background-color: var(--teal-50);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline-light {
    background-color: transparent;
    color: #fff;
    border-color: rgba(255, 255, 255, 0.5);
}

.btn-outline-light:hover {
    background-color: rgba(255, 255, 255, 0.1);
    border-color: #fff;
    transform: translateY(-2px);
}

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

/* --- Navigation --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(250, 250, 248, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--slate-200);
    transition: all var(--transition-base);
}

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

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

.logo {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-serif);
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--slate-900);
}

.logo-icon {
    color: var(--teal-700);
}

.logo-light {
    color: #fff;
}

.logo-light .logo-icon {
    color: var(--teal-400);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-2xl);
}

.nav-links a {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--slate-600);
    transition: color var(--transition-fast);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--teal-600);
    transition: width var(--transition-base);
}

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

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

.nav-cta {
    background: var(--teal-800);
    color: #fff !important;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    font-weight: 600 !important;
    font-size: 0.875rem !important;
    transition: all var(--transition-base) !important;
}

.nav-cta::after {
    display: none;
}

.nav-cta:hover {
    background: var(--teal-900) !important;
    color: #fff !important;
    transform: translateY(-1px);
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--slate-800);
    border-radius: 2px;
    transition: all var(--transition-base);
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* --- Hero Section --- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 72px;
    overflow: hidden;
    background: var(--warm-100);
}

.hero-pattern {
    position: absolute;
    top: 0;
    right: 0;
    width: 45%;
    height: 100%;
    background: 
        radial-gradient(ellipse at 70% 20%, rgba(45, 145, 145, 0.06) 0%, transparent 60%),
        radial-gradient(ellipse at 30% 80%, rgba(13, 79, 79, 0.04) 0%, transparent 50%);
    pointer-events: none;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--teal-800), var(--teal-500), var(--teal-800));
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: center;
    padding-top: var(--space-3xl);
    padding-bottom: var(--space-3xl);
    position: relative;
    z-index: 1;
}

.hero-eyebrow {
    font-size: 0.8125rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--teal-700);
    margin-bottom: var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.hero-eyebrow::before {
    content: '';
    width: 40px;
    height: 2px;
    background: var(--teal-600);
}

.hero-headline {
    font-size: clamp(2.25rem, 5vw, 3.75rem);
    font-weight: 900;
    line-height: 1.08;
    color: var(--slate-950);
    margin-bottom: var(--space-xl);
    letter-spacing: -0.02em;
}

.hero-headline em {
    font-style: italic;
    color: var(--teal-800);
}

.hero-subheadline {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--slate-600);
    margin-bottom: var(--space-2xl);
    max-width: 520px;
}

.hero-actions {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.hero-image {
    position: relative;
}

.hero-img-wrapper {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.hero-img-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    aspect-ratio: 600/750;
}

.hero-img-wrapper::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.15);
    pointer-events: none;
}

.hero-badge {
    position: absolute;
    bottom: var(--space-xl);
    left: calc(-1 * var(--space-xl));
    background: var(--slate-900);
    color: #fff;
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    box-shadow: var(--shadow-lg);
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--teal-400);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(1.3); }
}

/* --- Services Section --- */
.services {
    padding: var(--space-4xl) 0;
    background: var(--warm-100);
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--space-3xl);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

.service-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    border: 1px solid var(--slate-200);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--teal-700), var(--teal-400));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-base);
}

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

.service-card:hover::before {
    transform: scaleX(1);
}

.service-icon {
    width: 56px;
    height: 56px;
    background: var(--teal-50);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--teal-800);
    margin-bottom: var(--space-lg);
    transition: all var(--transition-base);
}

.service-card:hover .service-icon {
    background: var(--teal-800);
    color: #fff;
}

.service-card h3 {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
    color: var(--slate-900);
}

.service-card p {
    font-size: 0.9375rem;
    line-height: 1.65;
    color: var(--slate-600);
}

/* --- About Section --- */
.about {
    padding: var(--space-4xl) 0;
    background: var(--slate-50);
}

.about-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: center;
}

.about-image {
    position: relative;
}

.about-image img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    object-fit: cover;
    aspect-ratio: 550/650;
}

.about-stat {
    position: absolute;
    bottom: calc(-1 * var(--space-xl));
    right: calc(-1 * var(--space-xl));
    background: var(--teal-800);
    color: #fff;
    padding: var(--space-xl) var(--space-2xl);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.stat-number {
    display: block;
    font-family: var(--font-serif);
    font-size: 1.75rem;
    font-weight: 700;
    line-height: 1.2;
}

.stat-label {
    font-size: 0.8125rem;
    font-weight: 500;
    opacity: 0.8;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.about-content .section-title {
    margin-bottom: var(--space-lg);
}

.about-content > p {
    font-size: 1.0625rem;
    line-height: 1.75;
    color: var(--slate-600);
    margin-bottom: var(--space-lg);
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
    margin-top: var(--space-2xl);
}

.feature-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--slate-700);
}

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

/* --- CTA Banner --- */
.cta-banner {
    padding: var(--space-4xl) 0;
    background: var(--slate-900);
    position: relative;
    overflow: hidden;
}

.cta-banner::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse at 20% 50%, rgba(45, 145, 145, 0.15) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 50%, rgba(94, 234, 212, 0.08) 0%, transparent 50%);
    pointer-events: none;
}

.cta-inner {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-2xl);
    flex-wrap: wrap;
}

.cta-eyebrow {
    color: var(--teal-400);
}

.cta-title {
    color: #fff;
    max-width: 600px;
    font-size: clamp(1.75rem, 3.5vw, 2.5rem);
}

.cta-actions {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

/* --- Contact Section --- */
.contact {
    padding: var(--space-4xl) 0;
    background: var(--warm-100);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
}

.info-block {
    display: flex;
    gap: var(--space-lg);
    padding: var(--space-xl) 0;
    border-bottom: 1px solid var(--slate-200);
}

.info-block:first-child {
    padding-top: 0;
}

.info-block:last-child {
    border-bottom: none;
}

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

.info-block h4 {
    font-family: var(--font-sans);
    font-size: 0.8125rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--slate-500);
    margin-bottom: var(--space-xs);
}

.info-block p {
    font-size: 1rem;
    color: var(--slate-800);
    line-height: 1.6;
}

.info-block a {
    color: var(--teal-700);
    transition: color var(--transition-fast);
}

.info-block a:hover {
    color: var(--teal-900);
    text-decoration: underline;
}

/* Contact Form */
.contact-form-wrapper {
    background: #fff;
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    border: 1px solid var(--slate-200);
    box-shadow: var(--shadow-sm);
}

.contact-form h3 {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    margin-bottom: var(--space-xl);
    color: var(--slate-900);
}

.form-group {
    margin-bottom: var(--space-lg);
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--slate-700);
    margin-bottom: var(--space-sm);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    color: var(--slate-800);
    background: var(--slate-50);
    border: 1.5px solid var(--slate-200);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--teal-600);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(45, 145, 145, 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;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: var(--teal-50);
    border: 1px solid var(--teal-200);
    border-radius: var(--radius-md);
    color: var(--teal-800);
    font-size: 0.9375rem;
    font-weight: 500;
    margin-top: var(--space-md);
}

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

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

/* --- Map Section --- */
.map-section {
    border-top: 1px solid var(--slate-200);
}

.map-container {
    filter: saturate(0.7) contrast(1.05);
}

/* --- Footer --- */
.footer {
    background: var(--slate-900);
    color: var(--slate-400);
    padding: var(--space-4xl) 0 var(--space-xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: var(--space-3xl);
    margin-bottom: var(--space-3xl);
}

.footer-brand p {
    margin-top: var(--space-md);
    font-size: 0.9375rem;
    line-height: 1.7;
    max-width: 280px;
}

.footer-links h4,
.footer-contact h4 {
    font-family: var(--font-sans);
    font-size: 0.8125rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--slate-300);
    margin-bottom: var(--space-lg);
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

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

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

.footer-contact p {
    font-size: 0.9375rem;
    line-height: 1.7;
    margin-bottom: var(--space-sm);
}

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

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

.footer-bottom {
    border-top: 1px solid var(--slate-800);
    padding-top: var(--space-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
    font-size: 0.875rem;
    color: var(--slate-500);
}

/* --- Scroll Animations --- */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* --- Responsive --- */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: var(--space-3xl);
    }
    
    .hero-image {
        max-width: 500px;
        margin: 0 auto;
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-container {
        grid-template-columns: 1fr;
        gap: var(--space-3xl);
    }
    
    .about-image {
        max-width: 500px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-2xl);
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-lg);
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .nav-links {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(250, 250, 248, 0.98);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        flex-direction: column;
        padding: var(--space-xl);
        gap: var(--space-lg);
        border-bottom: 1px solid var(--slate-200);
        box-shadow: var(--shadow-lg);
        transform: translateY(-120%);
        transition: transform var(--transition-base);
        z-index: 999;
    }
    
    .nav-links.open {
        transform: translateY(0);
    }
    
    .hero {
        min-height: auto;
        padding-top: 100px;
        padding-bottom: var(--space-3xl);
    }
    
    .hero-headline {
        font-size: clamp(1.75rem, 7vw, 2.5rem);
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .hero-actions .btn {
        justify-content: center;
    }
    
    .hero-badge {
        left: var(--space-lg);
        bottom: var(--space-lg);
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .about-stat {
        position: relative;
        bottom: auto;
        right: auto;
        display: inline-block;
        margin-top: var(--space-lg);
    }
    
    .about-features {
        grid-template-columns: 1fr;
    }
    
    .cta-inner {
        flex-direction: column;
        text-align: center;
    }
    
    .cta-actions {
        justify-content: center;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    :root {
        --space-4xl: 4rem;
        --space-3xl: 3rem;
    }
    
    .hero-img-wrapper {
        aspect-ratio: 4/5;
    }
}