* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-dark: #050a15;
    --bg-card: #0a1628;
    --bg-card-hover: #0d1f3c;
    --blue-primary: #00b4ff;
    --blue-glow: #00d4ff;
    --purple-accent: #7b2ff2;
    --text-primary: #e0e8f5;
    --text-secondary: #7a8ba8;
    --border-color: rgba(0, 180, 255, 0.2);
    --border-hover: rgba(0, 212, 255, 0.5);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

.glow-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    background:
        radial-gradient(ellipse 800px 400px at 20% 20%, rgba(0, 180, 255, 0.06) 0%, transparent 70%),
        radial-gradient(ellipse 600px 600px at 80% 30%, rgba(123, 47, 242, 0.05) 0%, transparent 70%),
        radial-gradient(ellipse 500px 300px at 50% 80%, rgba(0, 180, 255, 0.04) 0%, transparent 70%);
}

.particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.particle {
    position: absolute;
    width: 1.5px;
    height: 1.5px;
    background: var(--blue-glow);
    border-radius: 50%;
    opacity: 0;
    animation: particleFade 3s infinite;
    will-change: transform, opacity;
    transform: translateZ(0);
}

@keyframes particleFade {
    0%, 100% { opacity: 0; transform: translateY(0); }
    50% { opacity: 0.6; transform: translateY(-30px); }
}

.hero {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 20px 20px;
    gap: 30px;
}

.hero-left, .hero-right {
    flex-shrink: 0;
}

.robot-svg {
    width: 120px;
    height: 140px;
    /* filter removed for performance */
}

.brain-svg {
    width: 130px;
    height: 110px;
    /* filter removed for performance */
}

.hero-center {
    text-align: center;
}

.title {
    font-family: 'Orbitron', sans-serif;
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: 900;
    letter-spacing: 8px;
    background: linear-gradient(135deg, #ffffff 0%, #00d4ff 50%, #7b2ff2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: none;
    /* filter removed for performance */
    animation: titleGlow 3s ease-in-out infinite alternate;
}

@keyframes titleGlow {
    0% { filter: drop-shadow(0 0 15px rgba(0, 212, 255, 0.15)); }
    100% { filter: drop-shadow(0 0 30px rgba(0, 212, 255, 0.3)); }
}

.subtitle {
    font-family: 'Orbitron', sans-serif;
    font-size: clamp(0.65rem, 1.5vw, 0.9rem);
    letter-spacing: 6px;
    color: var(--text-secondary);
    margin-top: 12px;
    text-transform: uppercase;
}

.eye-glow {
    animation: eyeBlink 3s ease-in-out infinite;
}

@keyframes eyeBlink {
    0%, 90%, 100% { opacity: 1; r: 3; }
    95% { opacity: 0.3; r: 1; }
}

.antenna-light {
    animation: antennaPulse 2s ease-in-out infinite;
}

@keyframes antennaPulse {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 1; }
}

.synapse {
    animation: synapsePulse 2.5s ease-in-out infinite;
}

@keyframes synapsePulse {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 1; }
}

.sound-wave {
    animation: soundWave 1.5s ease-in-out infinite;
}

@keyframes soundWave {
    0%, 100% { opacity: 0.2; }
    50% { opacity: 0.7; }
}

/* Cards Grid */
.cards-grid {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 16px;
    padding: 30px 24px 60px;
    max-width: 1400px;
    margin: 0 auto;
}

.card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px 16px 16px;
    text-decoration: none;
    color: var(--text-primary);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    min-height: 180px;
    overflow: hidden;
    cursor: pointer;
    opacity: 0;
    transform: translateY(30px);
}

.card.visible {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out, border-color 0.4s, background 0.4s, box-shadow 0.4s;
}

.card:not(.visible):hover {
    transform: translateY(30px);
}

.card.visible:hover {
    transform: translateY(-5px);
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
    box-shadow: 0 4px 12px rgba(0, 180, 255, 0.08);
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--blue-primary), transparent);
    opacity: 0;
    transition: opacity 0.3s;
}

.card::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 12px;
    background: radial-gradient(circle at 50% 0%, rgba(0, 180, 255, 0.08) 0%, transparent 60%);
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
}

.card.visible::before {
    opacity: 1;
}

.card.visible::after {
    opacity: 1;
}

.card-num {
    position: absolute;
    top: 10px;
    left: 10px;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--purple-accent), var(--blue-primary));
    border-radius: 8px;
    font-family: 'Orbitron', sans-serif;
    font-size: 0.75rem;
    font-weight: 700;
    color: #fff;
    box-shadow: 0 2px 10px rgba(123, 47, 242, 0.4);
}

.card-title {
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    font-weight: 600;
    margin-top: 24px;
    margin-bottom: auto;
    line-height: 1.3;
    color: #fff;
}

.card-icon {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 15px 0;
    flex-grow: 1;
}

.card-icon svg {
    width: 70px;
    height: 70px;
    transition: transform 0.3s, filter 0.3s;
}

.card.visible:hover .card-icon svg {
    transform: scale(1.05);
}

.card-desc {
    font-size: 0.75rem;
    color: var(--text-secondary);
    line-height: 1.4;
    margin-top: auto;
}

/* AI Logos for card 1 */
.ai-logos {
    display: flex;
    gap: 10px;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
}

.ai-logo {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    color: var(--blue-glow);
    background: rgba(0, 180, 255, 0.05);
    transition: all 0.3s;
}

.card.visible:hover .ai-logo {
    border-color: var(--border-hover);
    background: rgba(0, 180, 255, 0.1);
    box-shadow: 0 0 10px rgba(0, 180, 255, 0.2);
}

/* CTA Card */
.card-cta {
    grid-column: span 2;
    background: linear-gradient(135deg, #0a1628 0%, #0d1f3c 50%, #1a0a3e 100%);
    border-color: rgba(123, 47, 242, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    min-height: 180px;
}

.card-cta:hover {
    border-color: rgba(123, 47, 242, 0.6);
    box-shadow:
        0 10px 40px rgba(123, 47, 242, 0.2),
        0 0 30px rgba(123, 47, 242, 0.1);
}

.cta-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.rocket-svg {
    width: 60px;
    height: 60px;
    /* filter removed for performance */
    animation: rocketFloat 3s ease-in-out infinite;
}

@keyframes rocketFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.cta-text {
    font-family: 'Inter', sans-serif;
    font-size: 1.1rem;
    font-weight: 600;
    line-height: 1.5;
    color: #fff;
}

.cta-icons {
    display: flex;
    gap: 16px;
    margin-top: 4px;
}

.cta-icon-item {
    font-size: 1.2rem;
    opacity: 0.6;
    transition: opacity 0.3s;
}

.card-cta:hover .cta-icon-item {
    opacity: 1;
}

/* Responsive */
@media (max-width: 1200px) {
    .cards-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    .card-cta {
        grid-column: span 2;
    }
}

@media (max-width: 900px) {
    .cards-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .hero {
        flex-direction: column;
        gap: 15px;
        padding: 30px 20px 15px;
    }
    .robot-svg, .brain-svg {
        width: 80px;
        height: 95px;
    }
}

@media (max-width: 650px) {
    .cards-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
        padding: 20px 12px 40px;
    }
    .card-cta {
        grid-column: span 2;
    }
    .title {
        letter-spacing: 4px;
    }
    .subtitle {
        letter-spacing: 3px;
        font-size: 0.6rem;
    }
}

@media (max-width: 400px) {
    .cards-grid {
        grid-template-columns: 1fr;
    }
    .card-cta {
        grid-column: span 1;
    }
}


/* Grid line background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    background-image:
        linear-gradient(rgba(0, 180, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 180, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
}

/* Selection */
::selection {
    background: rgba(0, 180, 255, 0.3);
    color: #fff;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
    background: rgba(0, 180, 255, 0.3);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 180, 255, 0.5);
}