/* Big Oil - Main Stylesheet */

/* CSS Variables */
:root {
    --color-primary: #1a1a2e;
    --color-secondary: #16213e;
    --color-accent: #d4a574;
    --color-gold: #c9a227;
    --color-text: #f5f5f5;
    --color-text-muted: #a0a0a0;
    --color-dark: #0f0f1a;
    --font-heading: 'Oswald', sans-serif;
    --font-body: 'Open Sans', sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-dark);
    color: var(--color-text);
    line-height: 1.6;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Hero Section with Oil Derrick Background */
.hero {
    position: relative;
    min-height: 100vh;
    /* Texas/Permian Basin Oil Derrick at Sunset - dramatic silhouette */
    background-image: url('https://images.unsplash.com/photo-1586953208448-b95a79798f07?w=1920&q=85');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    display: flex;
    flex-direction: column;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        135deg,
        rgba(15, 15, 26, 0.85) 0%,
        rgba(26, 26, 46, 0.7) 50%,
        rgba(15, 15, 26, 0.9) 100%
    );
}

.hero-content {
    position: relative;
    z-index: 2;
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* Navigation */
.main-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 40px;
    background: rgba(15, 15, 26, 0.3);
    backdrop-filter: blur(10px);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    font-size: 2.5rem;
    color: var(--color-gold);
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: 3px;
    color: var(--color-text);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav-links a {
    color: var(--color-text);
    text-decoration: none;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

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

/* Navigation Dropdown */
.nav-dropdown {
    position: relative;
}

.nav-dropdown .dropdown-toggle {
    cursor: pointer;
}

.nav-dropdown .dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    background: rgba(15, 15, 26, 0.95);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(201, 162, 39, 0.2);
    border-radius: 8px;
    min-width: 200px;
    padding: 10px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s ease;
    list-style: none;
    z-index: 1000;
}

.nav-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-dropdown .dropdown-menu li {
    padding: 0;
}

.nav-dropdown .dropdown-menu a {
    display: block;
    padding: 12px 20px;
    text-transform: none;
    letter-spacing: 0;
    font-size: 0.95rem;
    transition: all 0.2s;
}

.nav-dropdown .dropdown-menu a:hover {
    background: rgba(201, 162, 39, 0.1);
    color: var(--color-gold);
}

/* Hero Text */
.hero-text {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 60px 20px;
}

.hero-text h1 {
    font-family: var(--font-heading);
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 700;
    letter-spacing: 8px;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-gold) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tagline {
    font-size: clamp(1rem, 2.5vw, 1.5rem);
    color: var(--color-accent);
    margin-bottom: 50px;
    letter-spacing: 2px;
}

/* Hero Stats */
.hero-stats {
    display: flex;
    gap: 60px;
    margin-bottom: 50px;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-gold);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* CTA Button */
.cta-button {
    display: inline-block;
    padding: 18px 50px;
    background: linear-gradient(135deg, var(--color-gold) 0%, var(--color-accent) 100%);
    color: var(--color-dark);
    text-decoration: none;
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    border-radius: 4px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(201, 162, 39, 0.3);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(201, 162, 39, 0.4);
}

/* Animated Oil Drop */
.oil-drop {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 30px;
    background: var(--color-dark);
    border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%;
    animation: drip 2s ease-in-out infinite;
    z-index: 3;
}

@keyframes drip {
    0%, 100% {
        transform: translateX(-50%) translateY(0);
        opacity: 1;
    }
    50% {
        transform: translateX(-50%) translateY(20px);
        opacity: 0.5;
    }
}

/* Section Styles */
section {
    padding: 100px 0;
}

section h2 {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 60px;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--color-gold);
}

/* About Section */
.about-section {
    background: var(--color-primary);
}

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

.about-text .lead {
    font-size: 1.3rem;
    color: var(--color-accent);
    margin-bottom: 20px;
    line-height: 1.8;
}

.about-text p {
    color: var(--color-text-muted);
    margin-bottom: 15px;
}

.image-frame {
    position: relative;
    border: 3px solid var(--color-gold);
    padding: 10px;
}

.image-frame img {
    width: 100%;
    height: auto;
    display: block;
    filter: sepia(20%);
}

/* Operations Section */
.operations-section {
    background: var(--color-secondary);
}

.operations-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.operation-card {
    background: var(--color-primary);
    padding: 40px 30px;
    text-align: center;
    border-radius: 8px;
    transition: all 0.3s ease;
    border-bottom: 3px solid transparent;
}

.operation-card:hover {
    transform: translateY(-10px);
    border-bottom-color: var(--color-gold);
}

.card-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 20px;
    color: var(--color-gold);
}

.card-icon svg {
    width: 100%;
    height: 100%;
}

.operation-card h3 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    margin-bottom: 15px;
    letter-spacing: 1px;
}

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

/* Sustainability Section */
.sustainability-section {
    background: var(--color-dark);
    /* Secondary oil field background */
    background-image:
        linear-gradient(rgba(15, 15, 26, 0.95), rgba(15, 15, 26, 0.95)),
        url('https://images.unsplash.com/photo-1497435334941-8c899ee9e8e9?w=1920&q=80');
    background-size: cover;
    background-position: center;
}

.sustainability-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.sustainability-text p {
    color: var(--color-text-muted);
    margin-bottom: 20px;
}

.sustainability-list {
    list-style: none;
}

.sustainability-list li {
    padding: 10px 0;
    padding-left: 30px;
    position: relative;
    color: var(--color-text);
}

.sustainability-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 12px;
    height: 12px;
    background: var(--color-gold);
    border-radius: 50%;
}

.sustainability-stats {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.sus-stat {
    background: var(--color-primary);
    padding: 40px;
    border-radius: 8px;
    text-align: center;
    border-left: 4px solid var(--color-gold);
}

.sus-number {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-gold);
    display: block;
}

.sus-label {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

/* Contact Section */
.contact-section {
    background: var(--color-primary);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
}

.contact-info h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    color: var(--color-gold);
    margin-bottom: 20px;
}

.contact-info p {
    color: var(--color-text-muted);
    margin-bottom: 15px;
}

.contact-detail strong {
    color: var(--color-text);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
    padding: 15px 20px;
    background: var(--color-secondary);
    border: 1px solid transparent;
    border-radius: 4px;
    color: var(--color-text);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--color-gold);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: var(--color-text-muted);
}

.submit-button {
    padding: 18px 40px;
    background: var(--color-gold);
    color: var(--color-dark);
    border: none;
    border-radius: 4px;
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.3s ease;
    align-self: flex-start;
}

.submit-button:hover {
    background: var(--color-accent);
    transform: translateY(-2px);
}

/* Footer */
.main-footer {
    background: var(--color-dark);
    padding: 60px 0 30px;
    border-top: 1px solid rgba(201, 162, 39, 0.2);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand p {
    color: var(--color-text-muted);
    margin-top: 15px;
}

.footer-links h4 {
    font-family: var(--font-heading);
    color: var(--color-gold);
    margin-bottom: 20px;
    letter-spacing: 1px;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: var(--color-text-muted);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .operations-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

@media (max-width: 768px) {
    .main-nav {
        flex-direction: column;
        gap: 20px;
        padding: 15px 20px;
    }

    .nav-links {
        gap: 20px;
    }

    .hero-stats {
        flex-direction: column;
        gap: 30px;
    }

    .about-grid,
    .sustainability-content,
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .operations-grid {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    section {
        padding: 60px 0;
    }
}

@media (max-width: 480px) {
    .hero-text h1 {
        letter-spacing: 4px;
    }

    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }

    .cta-button {
        padding: 15px 30px;
    }
}