/* ===== REVEURSE TANZANIA - MAIN STYLESHEET ===== */
/* Colors from brand guide */
:root {
    --primary-green: #5ea017;
    --secondary-green: #68962c;
    --dark-charcoal: #212021;
    --light-gray: #f4f4f4;
    --medium-gray: #909090;
    --light-green: #e7f5d1;
    --dark-green: #587738;
    --soft-green: #a1c275;
    --dark-gray: #434443;
    --white: #ffffff;
    --black: #212021;
    
    --shadow-sm: 0 2px 4px rgba(33,32,33,0.1);
    --shadow-md: 0 4px 6px rgba(33,32,33,0.1);
    --shadow-lg: 0 10px 15px rgba(33,32,33,0.1);
    --transition: all 0.3s ease;
}

/* ===== RESET & BASE ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--dark-charcoal);
    line-height: 1.6;
    background-color: var(--light-gray);
    overflow-x: hidden;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--dark-charcoal);
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.25rem; }

p {
    margin-bottom: 1rem;
    color: var(--dark-gray);
}

.section-title {
    position: relative;
    display: inline-block;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 80px;
    height: 4px;
    background: var(--primary-green);
    border-radius: 2px;
}

.section-title.center {
    display: block;
    text-align: center;
}

.section-title.center::after {
    left: 50%;
    transform: translateX(-50%);
}

/* ===== LAYOUT ===== */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
}

section {
    padding: 5rem 0;
}

/* ===== NAVIGATION ===== */
.navbar {
    background: var(--white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
}

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

.logo h1 {
    font-size: 1.8rem;
    margin: 0;
    color: var(--dark-charcoal);
}

.logo span {
    color: var(--primary-green);
    font-size: 1rem;
    display: block;
    font-weight: 400;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: var(--dark-charcoal);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    padding-bottom: 0.25rem;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-green);
    transition: var(--transition);
}

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

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary-green);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 6px;
}

.hamburger span {
    width: 30px;
    height: 3px;
    background: var(--dark-charcoal);
    transition: var(--transition);
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

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

.btn-primary:hover {
    background: var(--secondary-green);
    border-color: var(--secondary-green);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-green);
    border: 2px solid var(--primary-green);
}

.btn-secondary:hover {
    background: var(--primary-green);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

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

/* ===== HERO SECTION ===== */
.hero {
    background: linear-gradient(135deg, var(--dark-charcoal) 0%, #2a2a2a 100%);
    color: var(--white);
    padding: 6rem 0;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" opacity="0.1"><path d="M20 20 L80 20 L80 80 L20 80 Z" fill="none" stroke="%235ea017" stroke-width="2"/><circle cx="50" cy="50" r="15" fill="none" stroke="%235ea017" stroke-width="2"/></svg>') repeat;
    opacity: 0.1;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero h1 {
    color: var(--white);
    margin-bottom: 1.5rem;
}

.hero h1 span {
    color: var(--primary-green);
}

.hero p {
    font-size: 1.25rem;
    color: var(--light-gray);
    margin-bottom: 2rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* ===== SERVICES GRID ===== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.service-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--light-green);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 0;
    background: var(--primary-green);
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-green);
}

.service-card:hover::before {
    height: 100%;
}

.service-icon {
    width: 60px;
    height: 60px;
    background: var(--light-green);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.service-icon i {
    font-size: 1.8rem;
    color: var(--primary-green);
}

.service-card h3 {
    margin-bottom: 1rem;
    font-size: 1.4rem;
}

.service-card p {
    margin-bottom: 1.5rem;
    color: var(--dark-gray);
}

.service-link {
    color: var(--primary-green);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.service-link:hover {
    gap: 1rem;
    color: var(--secondary-green);
}

/* ===== TEAM SECTION ===== */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 3rem;
    margin-top: 3rem;
}

.team-card {
    background: var(--white);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--light-green);
}

.team-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.team-image {
    height: 300px;
    background: linear-gradient(135deg, var(--soft-green), var(--light-green));
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.team-image i {
    font-size: 6rem;
    color: var(--dark-green);
    opacity: 0.5;
}

.team-info {
    padding: 1.5rem;
    text-align: center;
}

.team-info h3 {
    margin-bottom: 0.25rem;
    color: var(--dark-charcoal);
}

.team-info .position {
    color: var(--primary-green);
    font-weight: 600;
    margin-bottom: 1rem;
    display: block;
}

.team-info p {
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
}

.team-social {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.team-social a {
    width: 36px;
    height: 36px;
    background: var(--light-green);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--dark-green);
    transition: var(--transition);
}

.team-social a:hover {
    background: var(--primary-green);
    color: var(--white);
}

/* ===== TENDERS SECTION ===== */
.tenders-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.tender-filters {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.tender-filters select,
.tender-filters input {
    padding: 0.75rem 1rem;
    border: 2px solid var(--light-green);
    border-radius: 8px;
    font-size: 1rem;
    min-width: 200px;
    background: var(--white);
}

.tender-filters select:focus,
.tender-filters input:focus {
    outline: none;
    border-color: var(--primary-green);
}

.tenders-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.tender-card {
    background: var(--white);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--light-green);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.tender-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-green);
}

.tender-status {
    position: absolute;
    top: 1rem;
    right: 1rem;
    padding: 0.25rem 1rem;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
}

.status-open {
    background: var(--light-green);
    color: var(--dark-green);
}

.status-closed {
    background: var(--medium-gray);
    color: var(--white);
}

.tender-title {
    font-size: 1.3rem;
    margin: 1rem 0 0.5rem;
    padding-right: 5rem;
}

.tender-ref {
    color: var(--primary-green);
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.tender-meta {
    display: flex;
    gap: 1.5rem;
    margin: 1rem 0;
    font-size: 0.95rem;
}

.tender-meta i {
    color: var(--primary-green);
    width: 20px;
}

.tender-deadline {
    background: var(--light-green);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    margin: 1rem 0;
    font-weight: 600;
    color: var(--dark-green);
}

.tender-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.tender-actions .btn {
    flex: 1;
    text-align: center;
    padding: 0.6rem 1rem;
}

/* Tender Detail Page */
.tender-detail {
    background: var(--white);
    border-radius: 24px;
    padding: 2rem;
    box-shadow: var(--shadow-md);
    max-width: 900px;
    margin: 2rem auto;
}

.tender-header {
    border-bottom: 2px solid var(--light-green);
    padding-bottom: 1.5rem;
    margin-bottom: 1.5rem;
}

.tender-badge {
    display: inline-block;
    padding: 0.25rem 1rem;
    background: var(--light-green);
    color: var(--dark-green);
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-right: 1rem;
}

.tender-section {
    margin-bottom: 2rem;
}

.tender-section h3 {
    color: var(--dark-green);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.tender-section h3 i {
    color: var(--primary-green);
    margin-right: 0.5rem;
}

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

.document-list li {
    padding: 1rem;
    background: var(--light-gray);
    border-radius: 8px;
    margin-bottom: 0.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.document-list a {
    color: var(--primary-green);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.document-list a:hover {
    text-decoration: underline;
}

/* Tender Upload Form (Admin) */
.upload-form {
    background: var(--white);
    padding: 2rem;
    border-radius: 16px;
    max-width: 600px;
    margin: 2rem auto;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--dark-charcoal);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--light-green);
    border-radius: 8px;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-green);
}

.form-group input[type="file"] {
    padding: 0.5rem;
    border: 2px dashed var(--soft-green);
    background: var(--light-gray);
}

/* ===== CLIENTS SECTION ===== */
.clients-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 2rem;
    align-items: center;
    margin-top: 3rem;
}

.client-item {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--light-green);
}

.client-item:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-green);
}

.client-item i {
    font-size: 3rem;
    color: var(--dark-green);
    margin-bottom: 1rem;
}

.client-item span {
    font-weight: 600;
    color: var(--dark-charcoal);
}

/* ===== CONTACT SECTION ===== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-top: 3rem;
}

.contact-info {
    background: var(--white);
    padding: 2rem;
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
}

.contact-item {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--light-green);
}

.contact-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: var(--light-green);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon i {
    font-size: 1.5rem;
    color: var(--primary-green);
}

.contact-details h4 {
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
}

.contact-details p,
.contact-details a {
    color: var(--dark-gray);
    text-decoration: none;
    line-height: 1.8;
    transition: var(--transition);
}

.contact-details a:hover {
    color: var(--primary-green);
}

.map-container {
    width: 100%;
    height: 400px;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.map-container iframe {
    width: 100%;
    height: 100%;
    border: none;
}

.contact-form {
    background: var(--white);
    padding: 2rem;
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
}

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

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-logo h2 {
    color: var(--white);
    margin-bottom: 1rem;
}

.footer-logo span {
    color: var(--primary-green);
    font-size: 0.9rem;
    display: block;
    font-weight: 400;
}

.footer-logo p {
    color: var(--medium-gray);
    margin: 1rem 0;
}

.footer h4 {
    color: var(--white);
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
}

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

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: var(--medium-gray);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary-green);
    padding-left: 0.5rem;
}

.footer-contact p {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    color: var(--medium-gray);
}

.footer-contact i {
    color: var(--primary-green);
    width: 20px;
}

.footer-bottom {
    border-top: 1px solid var(--dark-gray);
    padding-top: 2rem;
    text-align: center;
    color: var(--medium-gray);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 1024px) {
    h1 { font-size: 3rem; }
    h2 { font-size: 2.2rem; }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 80px;
        flex-direction: column;
        background: var(--white);
        width: 100%;
        text-align: center;
        padding: 2rem 0;
        box-shadow: var(--shadow-md);
        transition: var(--transition);
        gap: 1rem;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 6px);
    }
    
    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -5px);
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .tenders-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .tender-filters {
        width: 100%;
    }
    
    .tender-filters select,
    .tender-filters input {
        width: 100%;
    }
}

@media (max-width: 480px) {
    h1 { font-size: 2.2rem; }
    h2 { font-size: 1.8rem; }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .tender-actions {
        flex-direction: column;
    }
    
    .tenders-grid {
        grid-template-columns: 1fr;
    }
    
    .tender-meta {
        flex-direction: column;
        gap: 0.5rem;
    }
}