/* 
  Stravon Forte Energy Limited - Global Styles
  Design System for a premium, minimalist corporate website.
*/

:root {
    --primary: #F20D0D; /* Industrial Red */
    --primary-dark: #C10B0B;
    --accent: #F7941D; /* Energy Orange */
    --dark: #1A1A1A;
    --light: #F9F9F9;
    --alt-bg: #F4F4F4;
    --text-main: #222222;
    --text-sec: #666666;
    --white: #FFFFFF;
    --transition: all 0.3s ease;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    --shadow-hover: 0 20px 40px rgba(0, 0, 0, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--light);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; margin-bottom: 1.5rem; }
h3 { font-size: 1.5rem; }

p {
    margin-bottom: 1rem;
    color: var(--text-sec);
}

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

ul {
    list-style: none;
}

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

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    border-radius: 4px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    font-size: 0.9rem;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
}

.btn-outline {
    background-color: transparent;
    border: 2px solid var(--white);
    color: var(--white);
}

.btn-outline:hover {
    background-color: var(--white);
    color: var(--primary);
}

.btn-accent-outline {
    background-color: transparent;
    border: 2px solid var(--accent);
    color: var(--accent);
}

.btn-accent-outline:hover {
    background-color: var(--accent);
    color: var(--white);
}

/* Header */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 1.5rem 0;
    transition: var(--transition);
}

header.scrolled {
    background-color: var(--white);
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

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

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

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo img {
    height: 60px; /* Adjust height as needed */
    width: auto;
    object-fit: contain;
}


.nav-menu {
    display: flex;
    gap: 2.5rem;
    align-items: center;
}

.nav-link {
    color: var(--white);
    font-weight: 500;
    font-size: 1rem;
}

.nav-link:hover {
    color: var(--accent) !important;
}

.hamburger {
    display: none;
    cursor: pointer;
}

/* Sections */
section {
    padding: 6rem 0;
}

.section-tag {
    color: var(--accent);
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 2px;
    font-size: 0.8rem;
    margin-bottom: 1rem;
    display: block;
}

/* Quick Contact Bar */
.quick-contact {
    background-color: var(--alt-bg);
    padding: 0.8rem 0;
    font-size: 0.85rem;
    border-bottom: 1px solid #eee;
}

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

.contact-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

/* Hero Section */
.hero {
    height: 100vh;
    background: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)), url('industrial_hero_africa.png');
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    color: var(--white);
    text-align: left;
}

.hero-content {
    max-width: 800px;
}

.hero h1 {
    margin-bottom: 1.5rem;
    animation: fadeInUp 1s ease;
}

.hero p {
    font-size: 1.25rem;
    color: rgba(255,255,255,0.9);
    margin-bottom: 2.5rem;
    animation: fadeInUp 1.2s ease;
}

.hero-btns {
    display: flex;
    gap: 1.5rem;
    animation: fadeInUp 1.4s ease;
}

/* Services Section */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.service-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 8px;
    transition: var(--transition);
    border-bottom: 4px solid transparent;
    box-shadow: var(--shadow);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
    border-bottom-color: var(--accent);
}

.service-icon {
    font-size: 2.5rem;
    color: var(--accent);
    margin-bottom: 1.5rem;
}

.service-card h3 {
    margin-bottom: 1rem;
}

/* About Preview */
.about-preview {
    display: flex;
    gap: 4rem;
    align-items: center;
}

.about-text {
    flex: 1;
}

.about-img {
    flex: 1;
    position: relative;
}

.about-img img {
    border-radius: 8px;
    box-shadow: 20px 20px 0 var(--accent);
}

/* Why Choose Us */
.why-section {
    background-color: var(--dark);
    color: var(--white);
}

.why-section p {
    color: rgba(255,255,255,0.7);
}

.why-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

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

.why-icon {
    font-size: 2rem;
    color: var(--accent);
    margin-bottom: 1rem;
}

/* CTA Section */
.cta-block {
    background-color: var(--primary);
    color: var(--white);
    text-align: center;
}

.cta-block h2 {
    color: var(--white);
}

.cta-block p {
    color: rgba(255,255,255,0.9);
    margin-bottom: 2rem;
}

.cta-block .btn-outline {
    border-color: var(--white);
}

/* Contact Form */
.contact-container {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 4rem;
}

.contact-info h3 {
    margin-bottom: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.form-group input, .form-group textarea, .form-group select {
    width: 100%;
    padding: 1rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    outline: none;
    transition: var(--transition);
}

.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
    border-color: var(--accent);
}

/* Footer */
footer {
    background-color: var(--dark);
    color: var(--white);
    padding: 4rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 2fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-logo img {
    height: 80px; /* Larger in footer */
    width: auto;
    object-fit: contain;
    margin-bottom: 1.5rem;
}


.footer-links h4 {
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 0.5rem;
}

.footer-links h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background-color: var(--accent);
}

.footer-links li {
    margin-bottom: 0.8rem;
}

.footer-links a {
    color: rgba(255,255,255,0.7);
}

.footer-links a:hover {
    color: var(--accent);
    padding-left: 5px;
}

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    text-align: center;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.5);
}

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

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

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

/* Responsiveness */
@media (max-width: 1024px) {
    h1 { font-size: 2.8rem; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .hamburger {
        display: block;
        color: var(--white);
        font-size: 1.5rem;
    }
    
    header.scrolled .hamburger {
        color: var(--text-main);
    }
    
    .hero h1 { font-size: 2.2rem; }
    
    .about-preview {
        flex-direction: column;
    }
    
    .contact-container {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

/* WhatsApp Floating Widget */
.whatsapp-container {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 10px;
}

.whatsapp-greeting {
    background: var(--white);
    padding: 12px 20px;
    border-radius: 12px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-main);
    max-width: 200px;
    position: relative;
    animation: slideInRight 0.5s ease forwards, bounce 2s infinite 1s;
    border-bottom: 2px solid #25d366;
}

.whatsapp-greeting::after {
    content: '';
    position: absolute;
    bottom: -8px;
    right: 20px;
    width: 15px;
    height: 15px;
    background: var(--white);
    transform: rotate(45deg);
    box-shadow: 2px 2px 5px rgba(0,0,0,0.05);
}

.whatsapp-float {
    width: 60px;
    height: 60px;
    background-color: #25d366;
    color: #FFF;
    border-radius: 50px;
    text-align: center;
    font-size: 30px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    animation: pulse 2s infinite;
}

.whatsapp-float:hover {
    background-color: #128C7E;
    transform: scale(1.1) rotate(5deg);
    color: #FFF;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

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

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {transform: translateY(0);}
    40% {transform: translateY(-5px);}
    60% {transform: translateY(-3px);}
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.5); }
    70% { box-shadow: 0 0 0 15px rgba(37, 211, 102, 0); }
    100% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0); }
}

@media (max-width: 768px) {
    .whatsapp-container {
        bottom: 20px;
        right: 20px;
    }
    .whatsapp-greeting {
        display: none;
    }
    .whatsapp-float {
        width: 55px;
        height: 55px;
        font-size: 28px;
    }
}