/* CSS Variables */
:root {
    --primary-color: #E32636;
    --primary-dark: #b81f2b;
    --dark-bg: #111827;
    --light-bg: #f3f4f6;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --white: #ffffff;
    --font-main: 'Inter', sans-serif;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

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

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

ul {
    list-style: none;
}

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

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--dark-bg);
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--primary-color);
    margin: 10px auto 0;
    border-radius: 2px;
}

.section-padding {
    padding: 5rem 0;
}

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

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.8rem 1.8rem;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-align: center;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(227, 38, 54, 0.3);
}

.btn-nav {
    background: var(--primary-color);
    color: var(--white);
    padding: 0.5rem 1.5rem;
}

.btn-nav:hover {
    background: var(--primary-dark);
}

.btn-block {
    display: block;
    width: 100%;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    z-index: 1000;
    transition: var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links li a {
    font-weight: 600;
    color: var(--dark-bg);
    transition: var(--transition);
}

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

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.mobile-menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--dark-bg);
    border-radius: 3px;
    transition: var(--transition);
}

/* Hero Section */
.hero {
    height: 100vh;
    min-height: 600px;
    background: linear-gradient(135deg, var(--dark-bg) 0%, #1f2937 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    color: var(--white);
    text-align: center;
    padding-top: 80px; /* offset navbar */
}

.hero-overlay {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: url('data:image/svg+xml;utf8,<svg width="20" height="20" viewBox="0 0 20 20" xmlns="http://www.w3.org/2000/svg"><circle cx="2" cy="2" r="1" fill="rgba(255,255,255,0.05)"/></svg>');
    pointer-events: none;
}

.hero-content {
    max-width: 800px;
    padding: 0 2rem;
    position: relative;
    z-index: 10;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    letter-spacing: -1px;
}

.hero .highlight {
    color: var(--primary-color);
}

.hero .subtitle {
    font-size: 1.25rem;
    color: #9ca3af;
    margin-bottom: 2rem;
}

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

.about-text h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: var(--dark-bg);
}

.about-text p {
    color: var(--text-light);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.about-features {
    display: grid;
    gap: 1.5rem;
}

.feature-card {
    background: var(--white);
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
    display: flex;
    flex-direction: column;
    border-left: 4px solid var(--primary-color);
}

.feature-icon {
    width: 44px;
    height: 44px;
    margin-bottom: 0.75rem;
    color: var(--primary-color);
}

.feature-icon svg {
    width: 44px;
    height: 44px;
}


.feature-card h3 {
    margin-bottom: 0.5rem;
    color: var(--dark-bg);
}

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

/* Track Record Section */
.bg-light {
    background: var(--light-bg);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.project-card {
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.04);
    transition: var(--transition);
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.08);
}

.project-header {
    padding: 1.5rem;
    border-bottom: 1px solid #e5e7eb;
    position: relative;
}

.project-header h3 {
    font-size: 1.25rem;
    color: var(--dark-bg);
    margin-bottom: 0.5rem;
}

.project-badge {
    display: inline-block;
    font-size: 0.75rem;
    background: #fee2e2;
    color: var(--primary-dark);
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    font-weight: 600;
}

.project-body {
    padding: 1.5rem;
}

.project-desc {
    color: var(--text-light);
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.project-list {
    margin-left: 1.2rem;
    color: var(--text-dark);
    font-size: 0.95rem;
}

.project-list li {
    margin-bottom: 0.5rem;
    list-style-type: disc;
    color: var(--text-light);
}

/* Contact Section */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    background: var(--white);
    padding: 3rem;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.05);
}

.contact-info h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--dark-bg);
}

.contact-info p {
    color: var(--text-light);
    margin-bottom: 2rem;
}

.info-item {
    margin-bottom: 1.5rem;
    display: flex;
    flex-direction: column;
}

.info-item strong {
    color: var(--dark-bg);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.25rem;
}

.info-item span {
    color: var(--text-light);
    font-size: 1.1rem;
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(227, 38, 54, 0.1);
}

/* Validation states */
.form-group input.invalid,
.form-group textarea.invalid {
    border-color: #ef4444;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.12);
}

.field-error {
    display: none;
    font-size: 0.82rem;
    color: #ef4444;
    margin-top: 0.35rem;
}

.field-error.visible {
    display: block;
}

/* Submit button states */
.btn-spinner {
    display: none;
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255,255,255,0.4);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
    margin-left: 0.5rem;
    vertical-align: middle;
}

.btn.loading .btn-text {
    opacity: 0.6;
}

.btn.loading .btn-spinner {
    display: inline-block;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Form status message */
.form-status {
    margin-top: 1rem;
    font-size: 0.95rem;
    text-align: center;
    min-height: 1.4em;
}

.form-status.success {
    color: #059669;
    font-weight: 600;
}

.form-status.error {
    color: #dc2626;
}

/* Contact email link */
.contact-email {
    color: var(--primary-color);
    font-size: 1.05rem;
    font-weight: 500;
    transition: var(--transition);
}

.contact-email:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* Footer */
footer {
    background: var(--dark-bg);
    color: var(--white);
    padding: 3rem 0;
    text-align: center;
}

/* Navbar scrolled state */
.navbar.scrolled {
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    padding: 0.4rem 0;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

footer p {
    color: #9ca3af;
    font-size: 0.9rem;
}

/* Animations */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease forwards;
}

.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Media Queries */
@media (max-width: 992px) {
    .about-grid, .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .hero h1 {
        font-size: 2.8rem;
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--white);
        flex-direction: column;
        justify-content: center;
        transition: 0.4s ease;
    }

    .nav-links.active {
        left: 0;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 6px);
    }
    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -6px);
    }
}