/* Global Variables & Colors */
:root {
    --bg-dark: #07070c;
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --border-color: rgba(255, 255, 255, 0.08);
    --glass-bg: rgba(13, 13, 23, 0.5);
    
    /* Neon glow colors */
    --purple-glow: rgba(147, 51, 234, 0.45);
    --blue-glow: rgba(59, 130, 246, 0.45);
    --pink-glow: rgba(236, 72, 153, 0.45);
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    overflow-x: hidden;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    padding: 40px 20px;
    z-index: 10;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 60px;
    animation: fadeInDown 0.8s ease-out;
}

.logo {
    font-family: 'Outfit', sans-serif;
    font-size: 3.5rem;
    font-weight: 800;
    letter-spacing: -1.5px;
    color: #ffffff;
    margin-bottom: 12px;
}

.logo-accent {
    background: linear-gradient(135deg, #00f2fe, #c084fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.tagline {
    font-family: 'Outfit', sans-serif;
    font-size: 1.25rem;
    font-weight: 300;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
}

/* Ambient Animated Background Blobs */
.blob-wrapper {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    overflow: hidden;
    pointer-events: none;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.25;
    animation: float 25s infinite alternate ease-in-out;
}

.blob-purple {
    top: -10%;
    left: 10%;
    width: 45vw;
    height: 45vw;
    background-color: #9333ea;
}

.blob-blue {
    bottom: -10%;
    right: 5%;
    width: 50vw;
    height: 50vw;
    background-color: #3b82f6;
    animation-delay: -5s;
}

.blob-pink {
    top: 30%;
    left: 50%;
    width: 35vw;
    height: 35vw;
    background-color: #ec4899;
    animation-delay: -10s;
}

/* Grid Container */
.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
    width: 100%;
    margin-bottom: 60px;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

/* Premium Card UI with Glassmorphism */
.card {
    position: relative;
    background-color: var(--glass-bg);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 40px;
    text-decoration: none;
    color: inherit;
    overflow: hidden;
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 380px;
}

/* Inner Glow Effect */
.card-glow {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle 200px at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(255, 255, 255, 0.03), transparent 80%);
    opacity: 0;
    transition: opacity 0.5s ease;
    pointer-events: none;
}

.card:hover .card-glow {
    opacity: 1;
}

/* Card Content styling */
.card-icon {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 28px;
    background-color: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.card-icon svg {
    width: 28px;
    height: 28px;
    color: var(--text-primary);
    transition: transform 0.3s ease;
}

.card h2 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 12px;
    transition: color 0.3s ease;
}

.card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: auto;
}

.card-action {
    display: flex;
    align-items: center;
    font-weight: 500;
    font-size: 0.95rem;
    margin-top: 30px;
    transition: gap 0.3s ease;
    gap: 8px;
}

.arrow-icon {
    width: 18px;
    height: 18px;
    transition: transform 0.3s ease;
}

/* Card Hover Animations & Glow Customization */

/* 1. Aligner Card (Purple) */
.card-align:hover {
    border-color: rgba(147, 51, 234, 0.5);
    box-shadow: 0 20px 40px -15px var(--purple-glow);
    transform: translateY(-8px);
}
.card-align:hover .card-icon {
    background-color: rgba(147, 51, 234, 0.1);
    border-color: rgba(147, 51, 234, 0.3);
}
.card-align:hover .card-icon svg {
    color: #c084fc;
    transform: rotate(15deg) scale(1.1);
}
.card-align:hover h2 {
    color: #c084fc;
}

/* 2. EBookStore Card (Blue) */
.card-store:hover {
    border-color: rgba(59, 130, 246, 0.5);
    box-shadow: 0 20px 40px -15px var(--blue-glow);
    transform: translateY(-8px);
}
.card-store:hover .card-icon {
    background-color: rgba(59, 130, 246, 0.1);
    border-color: rgba(59, 130, 246, 0.3);
}
.card-store:hover .card-icon svg {
    color: #60a5fa;
    transform: scale(1.1);
}
.card-store:hover h2 {
    color: #60a5fa;
}

/* 3. Reader Card (Pink) */
.card-reader:hover {
    border-color: rgba(236, 72, 153, 0.5);
    box-shadow: 0 20px 40px -15px var(--pink-glow);
    transform: translateY(-8px);
}
.card-reader:hover .card-icon {
    background-color: rgba(236, 72, 153, 0.1);
    border-color: rgba(236, 72, 153, 0.3);
}
.card-reader:hover .card-icon svg {
    color: #f472b6;
    transform: scale(1.1) translateY(-2px);
}
.card-reader:hover h2 {
    color: #f472b6;
}

/* Common Card Action Arrow Hover */
.card:hover .card-action {
    gap: 14px;
}
.card:hover .arrow-icon {
    transform: translateX(4px);
}

/* Footer Bottom styling */
.footer-bottom {
    text-align: center;
    color: #4b5563;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
    animation: fadeIn 1.2s ease-out 0.4s both;
}

/* Animations */
@keyframes float {
    0% {
        transform: translate(0, 0) scale(1);
    }
    50% {
        transform: translate(8%, 12%) scale(1.1);
    }
    100% {
        transform: translate(-5%, -8%) scale(0.95);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* Responsive Scaling details */
@media (max-width: 768px) {
    .logo {
        font-size: 2.75rem;
    }
    .tagline {
        font-size: 1.1rem;
    }
    .grid-container {
        grid-template-columns: 1fr;
        max-width: 480px;
    }
    .card {
        height: 340px;
        padding: 30px;
    }
}