/* ============= Base Styles ============= */
:root {
    --primary-color: #007bff;
    --primary-gradient: linear-gradient(135deg, #007bff, #0056b3);
    --primary-hover: linear-gradient(135deg, #0056b3, #003d80);
    --primary-light: rgba(0, 123, 255, 0.1);
    --card-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    --card-shadow-hover: 0 15px 30px rgba(0, 0, 0, 0.15);
    --text-color: #333;
    --text-light: #666;
    --background: #f8f9fa;
    --card-background: #fff;
    --transition-fast: 0.3s;
    --transition-medium: 0.5s;
    --transition-slow: 0.7s;
    --border-radius: 12px;
    --purple-glow: #8e44ad;
}

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

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--background);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

.page-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* ============= Header Styles ============= */
header {
    width: 100%;
    padding: 2rem 0;
    text-align: center;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--primary-gradient);
    border-radius: 50%;
    position: relative;
    animation: pulse 2s infinite;
}

.logo-icon::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    background-color: white;
    border-radius: 50%;
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(0, 123, 255, 0.7);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(0, 123, 255, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(0, 123, 255, 0);
    }
}

header h1 {
    font-size: 2.2rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    background: linear-gradient(135deg, #007bff, #0056b3);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin: 0;
}

.tagline {
    font-size: 1.1rem;
    font-weight: 300;
    margin-top: 0.5rem;
    color: var(--text-light);
    letter-spacing: 1px;
}

/* ============= Main Content ============= */
main {
    flex: 1;
    padding: 2rem 0;
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
}

/* ============= Grid and Card Styles ============= */
.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2.5rem;
    padding: 2rem;
}

.card {
    perspective: 1500px;
    height: 300px;
    transition: transform var(--transition-medium);
}

.card:hover {
    transform: translateY(-5px);
}

.card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transform-style: preserve-3d;
    transition: transform var(--transition-slow) cubic-bezier(0.4, 0, 0.2, 1);
}

.card-inner.is-flipped {
    transform: rotateY(180deg);
}

.card-front, .card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: var(--border-radius);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    overflow: hidden;
}

.card-front {
    background: var(--card-background);
    box-shadow: var(--card-shadow);
    transition: box-shadow var(--transition-medium), transform var(--transition-medium);
    transform: rotateY(0deg);
}

.card-front::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: var(--primary-gradient);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-medium);
}

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

.card-front:hover {
    box-shadow: var(--card-shadow-hover);
}

.card-back {
    background: linear-gradient(135deg, #f8f9fa, #fff);
    box-shadow: var(--card-shadow);
    transform: rotateY(180deg);
}

.card-icon {
    width: 60px;
    height: 60px;
    margin-bottom: 1.5rem;
    border-radius: 50%;
    background-color: var(--primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 1.5rem;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.gradient-text {
    font-size: 1.8rem;
    font-weight: 600;
    background: linear-gradient(to right, #f8ab5e 0, #f36961 20%, #a176c8 40%, #759beb 60%, #65beb3 80%, #70db96 100%);
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradientShift 5s ease infinite;
}

@keyframes gradientShift {
    0% {
        background-position: 0% center;
    }
    50% {
        background-position: 100% center;
    }
    100% {
        background-position: 0% center;
    }
}

.card-back h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.description {
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--text-light);
    font-weight: 300;
    line-height: 1.5;
}

/* ============= Button Styles ============= */
.btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.8rem 1.5rem;
    background: var(--primary-gradient);
    color: white;
    border: none;
    border-radius: 30px;
    cursor: pointer;
    font-weight: 500;
    letter-spacing: 0.5px;
    text-decoration: none;
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 123, 255, 0.3);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.2);
    transition: transform var(--transition-fast);
    transform: skewX(-15deg);
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 123, 255, 0.4);
}

.btn:hover::before {
    transform: translateX(200%) skewX(-15deg);
}

.btn-icon {
    font-size: 1.2rem;
    transition: transform var(--transition-fast);
}

.btn:hover .btn-icon {
    transform: translateY(2px);
}

.copy-notification {
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background-color: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 5px 10px;
    border-radius: 4px;
    font-size: 0.8rem;
    opacity: 0;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.copy-notification.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* ============= Footer Styles ============= */
footer {
    width: 100%;
    padding: 1.5rem 0;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.08);
    text-align: center;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.footer-content p {
    font-size: 0.95rem;
    color: var(--text-light);
}

.footer-year {
    margin-top: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-light);
    opacity: 0.7;
}

.name-link {
    display: inline-block;
    text-decoration: none;
    font-weight: 600;
    position: relative;
    padding: 0 5px;
    transition: transform var(--transition-fast);
}

.name-link:hover {
    transform: translateY(-2px);
}

.purple-glow {
    color: var(--purple-glow);
    transition: color var(--transition-fast), text-shadow var(--transition-fast);
}

.purple-glow:hover {
    color: #9b59b6;
    text-shadow: 0 0 10px rgba(142, 68, 173, 0.7);
}

.rainbow-text {
    background: linear-gradient(to right, #f8ab5e 0, #f36961 20%, #a176c8 40%, #759beb 60%, #65beb3 80%, #70db96 100%);
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    transition: var(--transition-fast);
    background-position: 0 0;
}

.rainbow-text:hover {
    animation: gradientShift 2s linear infinite;
}

/* ============= Custom Icons ============= */
.lightburn-icon {
    background-color: #ff652f;
}

.cura-icon {
    background-color: #00a0d2;
}

.eagle-icon {
    background-color: #f5a623;
}

.kicad-icon {
    background-color: #42b883;
}

.arduino-icon {
    background-color: #00979d;
}

.driver-icon {
    background-color: #9c27b0;
}

.esp-icon {
    background-color: #e91e63;
}

/* ============= Responsive Styles ============= */
@media (max-width: 1200px) {
    .grid-container {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        padding: 1.5rem;
    }
}

@media (max-width: 768px) {
    header h1 {
        font-size: 1.8rem;
    }
    
    .tagline {
        font-size: 1rem;
    }
    
    .grid-container {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 1.5rem;
        padding: 1rem;
    }
    
    .card {
        height: 280px;
    }
    
    .gradient-text {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    header {
        padding: 1.5rem 0;
    }
    
    header h1 {
        font-size: 1.5rem;
    }
    
    .tagline {
        font-size: 0.9rem;
    }
    
    .grid-container {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .card-icon {
        width: 50px;
        height: 50px;
    }
    
    .gradient-text {
        font-size: 1.3rem;
    }
    
    .btn {
        padding: 0.7rem 1.2rem;
    }
}