/* ==========================================================================
   VMR Combustíveis - Premium Stylesheet
   ========================================================================== */

/* --- Variables --- */
:root {
    /* Colors */
    --clr-bg-main: #f8fafc;
    --clr-bg-alt: #ffffff;
    --clr-bg-dark: #0f172a;
    --clr-text-main: #334155;
    --clr-text-muted: #64748b;
    --clr-heading: #0f172a;
    
    /* Brand Colors - Custon from Logo */
    --clr-primary: #ff8204;       /* VMR Orange */
    --clr-primary-glow: rgba(255, 130, 4, 0.4);
    --clr-accent: #ffc900;        /* VMR Yellow */
    --clr-accent-hover: #e0b000;
    
    /* Typography */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    /* Spacing & Layout */
    --container-width: 1200px;
    --section-pad: 5rem 1.5rem;
    
    /* Effects */
    --transition-fast: 0.2s ease;
    --transition-mid: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --shadow-soft: 0 10px 40px -10px rgba(0,0,0,0.08);
    --shadow-glow: 0 0 20px var(--clr-primary-glow);
    --radius-md: 12px;
    --radius-lg: 24px;
}

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

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

body {
    font-family: var(--font-body);
    color: var(--clr-text-main);
    background-color: var(--clr-bg-main);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--clr-heading);
    line-height: 1.2;
}

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

ul {
    list-style: none;
}

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

/* --- Utility Classes --- */
.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section {
    padding: var(--section-pad);
}

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

.section-tag {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--clr-primary);
    text-transform: uppercase;
    margin-bottom: 0.5rem;
    position: relative;
    padding-left: 3rem;
}

.section-tag::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 2rem;
    height: 2px;
    background-color: var(--clr-primary);
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    margin-bottom: 2rem;
    color: var(--clr-heading);
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border-radius: 50px;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition-mid);
    border: none;
    outline: none;
}

.btn-primary {
    background-color: var(--clr-primary);
    color: #fff;
    box-shadow: 0 4px 15px rgba(255, 130, 4, 0.3);
}

.btn-primary:hover {
    background-color: #e67603;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(255, 130, 4, 0.4);
}

.btn-glow {
    position: relative;
    z-index: 1;
}

.btn-glow::before {
    content: '';
    position: absolute;
    top: -2px; left: -2px; right: -2px; bottom: -2px;
    background: linear-gradient(45deg, var(--clr-primary), var(--clr-accent), var(--clr-primary));
    z-index: -1;
    border-radius: 50px;
    background-size: 400%;
    animation: glow 10s linear infinite;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.btn-glow:hover::before {
    opacity: 1;
}

@keyframes glow {
    0% { background-position: 0 0; }
    50% { background-position: 400% 0; }
    100% { background-position: 0 0; }
}

/* --- Header / Nav --- */
.header {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: 90px;
    background-color: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255,255,255,0.1);
    z-index: 1000;
    display: flex;
    align-items: center;
    transition: var(--transition-mid);
}

.header.scrolled {
    height: 70px;
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
    border-bottom-color: transparent;
}

.header.scrolled .logo-text {
    color: var(--clr-heading);
}

.header.scrolled .nav-link {
    color: var(--clr-text-main);
}

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

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    color: #fff;
    transition: var(--transition-mid);
}

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

.nav-list {
    display: flex;
    gap: 2rem;
}

.nav-link {
    font-family: var(--font-heading);
    font-weight: 500;
    font-size: 1rem;
    color: #fff;
    transition: var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--clr-accent);
    transition: var(--transition-fast);
}

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

.mobile-toggle {
    display: none;
    font-size: 1.5rem;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--clr-heading);
}

.header:not(.scrolled) .mobile-toggle {
    color: #fff;
}

/* --- Hero Section --- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 90px; /* offset for header */
}

.hero-bg {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    z-index: -1;
    overflow: hidden;
    background-color: var(--clr-bg-dark); /* fallback */
    background: radial-gradient(circle at center, #1e293b 0%, #0f172a 100%);
}

.hero-bg img {
    position: absolute;
    top: 0; left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    opacity: 0;
    transform: scale(1);
    transition: opacity 1.5s ease-in-out, transform 8s linear;
}

.hero-bg img.active {
    opacity: 1;
    transform: scale(1.05);
}

.overlay {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(to right, rgba(15, 23, 42, 0.9) 0%, rgba(15, 23, 42, 0.4) 100%);
}

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

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    color: #fff;
}

.hero-title span {
    color: var(--clr-accent);
}

.hero-subtitle {
    font-size: 1.125rem;
    font-weight: 300;
    color: rgba(255,255,255,0.8);
    margin-bottom: 2.5rem;
    max-width: 600px;
}

/* --- Features Section --- */
.features {
    margin-top: -80px;
    position: relative;
    z-index: 10;
    padding: 0 1.5rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.5);
    padding: 2.5rem 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    transition: var(--transition-mid);
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-10px);
    background: #fff;
    box-shadow: 0 20px 40px rgba(0,0,0,0.08);
}

.feature-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, rgba(255,130,4,0.15), rgba(255,130,4,0.05));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 1.75rem;
    color: var(--clr-primary);
    transition: var(--transition-mid);
}

.feature-card:hover .feature-icon {
    background: var(--clr-primary);
    color: #fff;
    transform: scale(1.1);
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.feature-card p {
    color: var(--clr-text-muted);
    font-size: 0.95rem;
}

/* --- About Section --- */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-image {
    position: relative;
}

.img-wrapper {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    aspect-ratio: 4/5;
    background: #e2e8f0;
}

.img-placeholder {
    width: 100%; height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: #94a3b8;
    background: linear-gradient(145deg, #f1f5f9, #e2e8f0);
}

.img-placeholder i {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.glass-float {
    position: absolute;
    bottom: -20px; right: -20px;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-soft);
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--clr-primary);
    border: 1px solid rgba(255,255,255,0.5);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
    100% { transform: translateY(0); }
}

.about-text p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: var(--clr-text-muted);
}

.about-text p:last-child {
    margin-bottom: 0;
}

/* --- Services (Accordion) --- */
.services {
    background-color: #fff;
    border-top: 1px solid #f1f5f9;
}

.accordion-container {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.accordion-item {
    border: 1px solid #e2e8f0;
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition-fast);
}

.accordion-item:hover,
.accordion-item.active {
    border-color: var(--clr-primary);
    box-shadow: 0 5px 15px rgba(255,130,4,0.1);
}

.accordion-header {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    background: transparent;
    border: none;
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--clr-heading);
    cursor: pointer;
    transition: var(--transition-fast);
}

.accordion-header:hover {
    color: var(--clr-primary);
}

.accordion-icon {
    color: var(--clr-primary);
    transition: transform 0.3s ease;
}

.accordion-item.active .accordion-icon {
    transform: rotate(180deg);
}

.accordion-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease-in-out;
}

.accordion-content {
    padding: 0 1.5rem 1.5rem;
    color: var(--clr-text-muted);
}

/* --- Contact Section --- */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 3rem;
    margin-top: 2rem;
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 5px 25px rgba(0,0,0,0.04);
}

.contact-info {
    background: var(--clr-bg-dark);
    color: #fff;
    padding: 3rem 2.5rem;
    position: relative;
    overflow: hidden;
}

.contact-info::before {
    content: '';
    position: absolute;
    top: -50%; right: -50%;
    width: 300px; height: 300px;
    background: radial-gradient(circle, var(--clr-primary-glow) 0%, transparent 60%);
}

.contact-info h3 {
    color: #fff;
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.contact-info p {
    color: rgba(255,255,255,0.7);
    margin-bottom: 3rem;
}

.info-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.info-icon {
    width: 40px; height: 40px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--clr-accent);
    font-size: 1rem;
    flex-shrink: 0;
}

.info-item span {
    display: block;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.6);
}

.info-item strong {
    font-size: 0.95rem;
    font-weight: 600;
    word-break: break-word;
}

.contact-form-container {
    padding: 3rem 3rem 3rem 0;
}

.contact-form-container h3 {
    margin-bottom: 2rem;
    font-size: 1.5rem;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--clr-text-main);
}

.required {
    color: #ef4444;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 1px solid #cbd5e1;
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 0.95rem;
    background: var(--clr-bg-main);
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--clr-primary);
    background: #fff;
    box-shadow: 0 0 0 4px rgba(255,130,4,0.1);
}

.btn-submit {
    align-self: flex-start;
    margin-top: 1rem;
}

/* --- Footer --- */
.footer {
    background-color: var(--clr-bg-alt);
    color: var(--clr-text-muted);
    padding-top: 5rem;
    border-top: 1px solid #e2e8f0;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin-bottom: 3rem;
}

.footer-logo {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer-logo .logo-text {
    font-size: 2rem;
}

.footer-contact h3 {
    color: var(--clr-heading);
    margin-bottom: 1.5rem;
    font-size: 1.25rem;
}

.footer-contact ul {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer-contact li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.footer-contact i {
    color: var(--clr-accent);
}

.footer-bottom {
    border-top: 1px solid #e2e8f0;
    padding: 1.5rem 0;
    font-size: 0.9rem;
}

/* --- Scroll To Top --- */
.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px; height: 50px;
    background: var(--clr-primary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: var(--shadow-glow);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition-mid);
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.scroll-top:hover {
    background: #e67603;
    transform: translateY(-5px);
}

/* --- Floating WhatsApp --- */
.whatsapp-float {
    position: fixed;
    bottom: 30px;
    left: 30px;
    width: 60px; height: 60px;
    background-color: #25D366;
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    box-shadow: 0 4px 15px rgba(37,211,102,0.3);
    z-index: 999;
    transition: var(--transition-mid);
    text-decoration: none;
}

.whatsapp-float:hover {
    transform: translateY(-5px) scale(1.05);
    background-color: #128C7E;
    box-shadow: 0 8px 25px rgba(37,211,102,0.4);
    color: #fff;
}

/* --- Keyframes & Animations --- */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.animate-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- Responsive Layout --- */
@media (max-width: 992px) {
    .about-grid,
    .contact-wrapper,
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .contact-wrapper {
        display: flex;
        flex-direction: column;
    }
    
    .contact-form-container {
        padding: 3rem 2rem;
    }
    
    .glass-float {
        right: 10px;
    }
}

@media (max-width: 768px) {
    .nav {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background: rgba(255, 255, 255, 0.98);
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
        padding: 2rem;
        flex-direction: column;
        transform: translateY(-150%);
        transition: transform 0.4s ease;
        z-index: 999;
    }
    
    .nav.nav-open {
        transform: translateY(0);
    }
    
    .nav-list {
        flex-direction: column;
        text-align: center;
        gap: 1.5rem;
    }
    
    .header:not(.scrolled) .nav-link {
        color: var(--clr-heading);
    }
    
    .mobile-toggle {
        display: block;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
}