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

:root {
    --bg-primary: #06060f;
    --bg-secondary: #0d0d1a;
    --bg-tertiary: #12121f;
    --accent: #6366f1;
    --accent-light: #818cf8;
    --accent-glow: rgba(99, 102, 241, 0.4);
    --accent-secondary: #06b6d4;
    --text-primary: #f1f1f7;
    --text-secondary: #a0a0b8;
    --text-muted: #6b6b82;
    --border: rgba(255, 255, 255, 0.08);
    --card-bg: rgba(255, 255, 255, 0.03);
    --card-border: rgba(255, 255, 255, 0.06);
    --gradient-1: linear-gradient(135deg, #6366f1, #06b6d4);
    --gradient-2: linear-gradient(135deg, #818cf8, #22d3ee);
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
}

h1, h2, h3, h4 {
    font-family: 'Space Grotesk', sans-serif;
    line-height: 1.2;
}

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

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

.section {
    padding: 7rem 0;
    position: relative;
}

.section-label {
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--accent-light);
    margin-bottom: 1rem;
}

.section-title {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 700;
    margin-bottom: 3.5rem;
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1.2rem 0;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.navbar.scrolled {
    background: rgba(6, 6, 15, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 0.8rem 0;
}

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

.logo {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text-primary);
}

.logo span, .logo-lg .dot {
    color: var(--accent-light);
}

.logo-lg {
    font-size: 2rem;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2.2rem;
}

.nav-links a {
    font-size: 0.92rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    transition: color 0.3s;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-1);
    transition: width 0.3s;
}

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

.nav-links a:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    width: 26px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s;
}

/* ===== Hero ===== */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    padding-top: 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 30% 20%, rgba(99, 102, 241, 0.12) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 80%, rgba(6, 182, 212, 0.08) 0%, transparent 50%);
    z-index: -2;
}

.hero-grid {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 3rem;
    align-items: center;
    width: 100%;
}

.hero-greeting {
    font-size: 1.1rem;
    color: var(--accent-light);
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.hero-title {
    font-size: clamp(3rem, 8vw, 5.5rem);
    font-weight: 700;
    background: var(--gradient-2);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    color: var(--text-secondary);
    font-weight: 400;
    margin-bottom: 1.5rem;
}

.hero-description {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 520px;
    margin-bottom: 2.5rem;
}

.hero-cta {
    display: flex;
    gap: 1.2rem;
    flex-wrap: wrap;
}

.orb {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.orb::before {
    content: '';
    position: absolute;
    width: 380px;
    height: 380px;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 30%, var(--accent-light), var(--accent) 40%, transparent 70%);
    filter: blur(2px);
    animation: orbFloat 8s ease-in-out infinite;
    box-shadow: 0 0 80px var(--accent-glow);
}

.orb::after {
    content: '';
    position: absolute;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    border: 1px solid rgba(99, 102, 241, 0.3);
    animation: orbRotate 20s linear infinite;
}

@keyframes orbFloat {
    0%, 100% { transform: translateY(0) scale(1); }
    50% { transform: translateY(-25px) scale(1.05); }
}

@keyframes orbRotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
    font-size: 0.75rem;
    letter-spacing: 2px;
}

.scroll-indicator span {
    width: 2px;
    height: 40px;
    background: linear-gradient(var(--accent), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; transform: scaleY(0.6); }
    50% { opacity: 1; transform: scaleY(1); }
}

/* ===== Buttons ===== */
.btn {
    display: inline-block;
    padding: 0.9rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
}

.btn-primary {
    background: var(--gradient-1);
    color: white;
    box-shadow: 0 4px 25px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 35px var(--accent-glow);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    border-color: var(--accent);
    background: rgba(99, 102, 241, 0.08);
    transform: translateY(-3px);
}

/* ===== About ===== */
.about-grid {
    display: grid;
    grid-template-columns: 1.3fr 0.7fr;
    gap: 4rem;
    align-items: start;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-top: 2.5rem;
}

.stat {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 1.5rem 1rem;
    text-align: center;
    transition: all 0.3s;
}

.stat:hover {
    border-color: var(--accent);
    transform: translateY(-5px);
}

.stat h4 {
    font-size: 1.3rem;
    margin-bottom: 0.3rem;
    background: var(--gradient-2);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stat p {
    font-size: 0.82rem;
    color: var(--text-muted);
}

.about-cards {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.cap-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1.2rem;
    transition: all 0.3s;
}

.cap-card:hover {
    border-color: var(--accent);
    background: rgba(99, 102, 241, 0.05);
    transform: translateX(8px);
}

.cap-icon {
    font-size: 2rem;
    width: 55px;
    height: 55px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(99, 102, 241, 0.1);
    border-radius: 12px;
    flex-shrink: 0;
}

.cap-card h4 {
    font-size: 1.05rem;
    margin-bottom: 0.3rem;
}

.cap-card p {
    font-size: 0.88rem;
    color: var(--text-muted);
}

/* ===== Services ===== */
.services {
    background: var(--bg-secondary);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.service-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 2.2rem 1.8rem;
    position: relative;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--gradient-1);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s;
}

.service-card:hover {
    border-color: rgba(99, 102, 241, 0.4);
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

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

.service-number {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 2.5rem;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.04);
    position: absolute;
    top: 1.5rem;
    right: 1.8rem;
}

.service-icon {
    font-size: 2.2rem;
    margin-bottom: 1.2rem;
}

.service-card h4 {
    font-size: 1.2rem;
    margin-bottom: 0.7rem;
}

.service-card p {
    font-size: 0.92rem;
    color: var(--text-muted);
}

/* ===== Research ===== */
.research-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.research-item {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 2rem;
    transition: all 0.3s;
}

.research-item:hover {
    border-color: var(--accent-secondary);
    background: rgba(6, 182, 212, 0.05);
    transform: translateY(-5px);
}

.research-item h4 {
    font-size: 1.15rem;
    margin-bottom: 0.6rem;
    color: var(--accent-light);
}

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

.research-note {
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-style: italic;
    border-left: 3px solid var(--accent);
    padding-left: 1.5rem;
}

/* ===== Collaborate ===== */
.collaborate {
    background: var(--bg-secondary);
}

.collaborate-grid {
    display: grid;
    grid-template-columns: 1.3fr 0.7fr;
    gap: 4rem;
    align-items: start;
}

.collaborate-text p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-bottom: 1.2rem;
}

.collaborate-box {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 2.5rem;
}

.collaborate-box h4 {
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
}

.steps {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.steps li {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.steps span {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    background: var(--gradient-1);
    color: white;
    font-weight: 700;
    font-family: 'Space Grotesk', sans-serif;
    flex-shrink: 0;
}

/* ===== Contact ===== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.contact-info p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-bottom: 1.5rem;
}

.contact-email {
    display: inline-block;
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--accent-light);
    transition: all 0.3s;
}

.contact-email:hover {
    color: var(--accent-secondary);
}

.contact-web {
    color: var(--text-muted);
    margin-top: 1rem;
}

.contact-form {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 2.5rem;
}

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

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.9rem 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    transition: border-color 0.3s;
    resize: vertical;
}

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

.form-success {
    margin-top: 1rem;
    color: var(--accent-light);
    font-size: 0.9rem;
    min-height: 1.2rem;
}

/* ===== Footer ===== */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 4rem 0 2rem;
}

.footer-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
    padding-bottom: 2.5rem;
    border-bottom: 1px solid var(--border);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.footer-bottom a {
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: color 0.3s;
}

.footer-bottom a:hover {
    color: var(--accent-light);
}

.footer-divider {
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--text-muted);
}

.footer-copy {
    color: var(--text-muted);
    font-size: 0.85rem;
    width: 100%;
    text-align: center;
    margin-top: 1rem;
}

/* ===== Animations ===== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* ===== Mobile Navigation ===== */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    z-index: 1050;
}

.nav-toggle span {
    width: 26px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s;
}

.nav-toggle.active span:nth-child(1) {
    transform: translateY(-1px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: translateY(1px) rotate(-45deg);
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 75%;
        max-width: 320px;
        height: 100vh;
        background: var(--bg-secondary);
        border-left: 1px solid var(--border);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 2.2rem;
        transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 1040;
    }

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

    .nav-links a {
        font-size: 1.1rem;
        color: var(--text-primary);
    }
}

/* ===== Small phones ===== */
@media (max-width: 480px) {
    .nav-links {
        width: 85%;
        max-width: 260px;
    }

    .container {
        padding: 0 1.2rem;
    }

    .nav-container {
        padding: 0 1.2rem;
    }

    .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .hero-visual {
        display: none;
    }

    .hero-description {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-cta {
        justify-content: center;
    }

    .section {
        padding: 4rem 0;
    }
}

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

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

    .about-grid,
    .collaborate-grid,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        height: 100vh;
        background: var(--bg-secondary);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 2rem;
        transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        border-left: 1px solid var(--border);
    }

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

    .section {
        padding: 4.5rem 0;
    }

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

    .about-stats {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1.2rem;
    }

    .hero-title {
        font-size: 2.8rem;
    }

    .contact-form {
        padding: 1.8rem;
    }
}