/* ===== DroneBrains - Spinventive Dark Theme ===== */
/* Matching Spinventive logo background color */

:root {
    /* Spinventive logo background color - dark navy blue */
    --spinventive-bg: #0a1628;
    --primary-blue: #1e3a8a;
    --secondary-blue: #3b82f6;
    --accent-cyan: #06b6d4;
    --dark-bg: #0a1628;
    --darker-bg: #050b14;
    --card-bg: #0f1a2e;
    --text-white: #ffffff;
    --text-gray: #94a3b8;
    --text-light: #cbd5e1;
    --border-color: #1e293b;
    --gradient-primary: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
    --gradient-accent: linear-gradient(135deg, #3b82f6 0%, #06b6d4 100%);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--dark-bg);
    color: var(--text-white);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
}

/* ===== Announcement Banner ===== */
.announcement-banner {
    background: var(--darker-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 14px 0;
}

.announcement-text {
    text-align: center;
    font-size: 14px;
    color: var(--text-light);
    font-weight: 400;
}

.brand-link {
    color: var(--accent-cyan);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s ease;
}

.brand-link:hover {
    color: var(--secondary-blue);
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 47px;
    width: 100%;
    background: rgba(10, 22, 40, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 0;
}

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

.logo-image {
    height: 36px;
    width: auto;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 40px;
    align-items: center;
}

.nav-menu a {
    color: var(--text-gray);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    transition: color 0.2s ease;
}

.nav-menu a:hover {
    color: var(--text-white);
}

.nav-link-external {
    color: var(--accent-cyan);
    font-weight: 600;
}

.nav-link-external:hover {
    color: var(--secondary-blue);
}

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

.hamburger span {
    width: 24px;
    height: 2px;
    background: var(--text-white);
    transition: all 0.3s ease;
}

/* ===== Hero Section ===== */
.hero {
    position: relative;
    min-height: 90vh;
    display: flex;
    align-items: center;
    padding: 180px 0 100px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 50%, rgba(59, 130, 246, 0.1) 0%, transparent 50%);
    z-index: 0;
}

.hero-grid {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(30, 41, 59, 0.3) 1px, transparent 1px),
        linear-gradient(90deg, rgba(30, 41, 59, 0.3) 1px, transparent 1px);
    background-size: 50px 50px;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
}

.hero-title {
    font-size: 4.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 2rem;
    letter-spacing: -0.03em;
}

.title-line {
    display: block;
}

.gradient-text {
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-gray);
    margin-bottom: 3rem;
    max-width: 700px;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

/* ===== Buttons ===== */
.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 16px;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 14px rgba(59, 130, 246, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.5);
}

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

.btn-secondary:hover {
    border-color: var(--secondary-blue);
    background: rgba(59, 130, 246, 0.1);
}

.btn-large {
    padding: 16px 40px;
    font-size: 17px;
}

/* ===== Stats Bar ===== */
.stats-bar {
    background: var(--card-bg);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    padding: 40px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
}

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

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.stat-label {
    color: var(--text-gray);
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-label {
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--accent-cyan);
    margin-bottom: 16px;
    font-weight: 600;
}

.section-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.section-description {
    color: var(--text-gray);
    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ===== Services Section - GRID LAYOUT ===== */
.services {
    background: var(--darker-bg);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.service-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 32px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-accent);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card:hover {
    border-color: var(--secondary-blue);
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.2);
}

.service-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.service-number {
    font-size: 14px;
    color: var(--text-gray);
    font-weight: 600;
}

.service-icon {
    font-size: 40px;
}

.service-card h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
    color: var(--text-white);
}

.service-card p {
    color: var(--text-gray);
    line-height: 1.6;
    margin-bottom: 20px;
    flex-grow: 1;
    font-size: 15px;
}

.service-tech {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.tech-badge {
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent-cyan);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
    border: 1px solid rgba(59, 130, 246, 0.2);
}

/* ===== Technology Section - GRID LAYOUT ===== */
.tech-section {
    background: var(--dark-bg);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 40px;
}

.tech-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 32px;
    transition: all 0.3s ease;
    text-align: center;
}

.tech-card:hover {
    border-color: var(--secondary-blue);
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.2);
}

.tech-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.tech-card h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
    color: var(--text-white);
}

.tech-card p {
    color: var(--text-gray);
    line-height: 1.6;
    font-size: 15px;
}

/* ===== About Section ===== */
.about-section {
    background: var(--darker-bg);
}

.certifications-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 60px;
}

.cert-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 32px;
    text-align: center;
    transition: all 0.3s ease;
}

.cert-card:hover {
    border-color: var(--secondary-blue);
    transform: translateY(-4px);
}

.cert-icon {
    font-size: 40px;
    color: var(--accent-cyan);
    margin-bottom: 16px;
}

.cert-card strong {
    display: block;
    font-size: 16px;
    margin-bottom: 8px;
    color: var(--text-white);
}

.cert-card p {
    color: var(--text-gray);
    font-size: 14px;
}

/* ===== Contact Section ===== */
.contact-section {
    background: var(--dark-bg);
}

.contact-wrapper {
    max-width: 1000px;
    margin: 0 auto;
}

.contact-header {
    text-align: center;
    margin-bottom: 60px;
}

.contact-intro {
    color: var(--text-gray);
    font-size: 1.1rem;
    margin-top: 16px;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.contact-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.contact-icon {
    font-size: 28px;
    flex-shrink: 0;
}

.contact-details strong {
    display: block;
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.contact-details p,
.contact-details a {
    color: var(--text-white);
    text-decoration: none;
    font-size: 16px;
}

.contact-details a:hover {
    color: var(--accent-cyan);
}

/* ===== Form Styles ===== */
.contact-form {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 40px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    margin-bottom: 20px;
}

.form-group label {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 14px 16px;
    background: var(--dark-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-family: inherit;
    font-size: 15px;
    color: var(--text-white);
    transition: all 0.2s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--secondary-blue);
    background: rgba(59, 130, 246, 0.05);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* ===== Footer ===== */
.footer {
    background: var(--darker-bg);
    border-top: 1px solid var(--border-color);
    padding: 60px 0 40px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.footer-logo {
    height: 44px;
    width: auto;
    margin-bottom: 16px;
}

.footer-tagline {
    color: var(--text-gray);
    font-size: 15px;
    margin-bottom: 8px;
}

.footer-copyright {
    color: var(--text-gray);
    font-size: 14px;
}

.footer-links {
    display: flex;
    gap: 32px;
    margin-bottom: 16px;
}

.footer-links a {
    color: var(--text-gray);
    text-decoration: none;
    font-size: 15px;
    transition: color 0.2s ease;
}

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

.footer-cert {
    color: var(--text-gray);
    font-size: 13px;
}

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

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

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

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

@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }

    .hero-title {
        font-size: 3rem;
    }

    .section-title {
        font-size: 2.25rem;
    }

    .navbar {
        top: 47px;
    }

    .hero {
        padding: 140px 0 80px;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 112px;
        flex-direction: column;
        background: var(--card-bg);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
        padding: 30px 0;
        gap: 20px;
        border-bottom: 1px solid var(--border-color);
    }

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

    .hamburger {
        display: flex;
    }

    .services-grid,
    .tech-grid,
    .certifications-grid {
        grid-template-columns: 1fr;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .footer-content {
        flex-direction: column;
        gap: 40px;
    }

    .footer-links {
        flex-direction: column;
        gap: 16px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.25rem;
    }

    .section-title {
        font-size: 1.875rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        text-align: center;
    }
}