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

html {
    /* Prevent font size adjustments on orientation change */
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background-color: #fde9ba;
    /* Smooth scrolling */
    scroll-behavior: smooth;
    /* Prevent horizontal overflow */
    overflow-x: hidden;
}

header {
    background: linear-gradient(135deg, #000000 0%, #764ba2 100%);
    color: white;
    padding: 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.16), 0 2px 10px rgba(0,0,0,0.12);
}

.header-content {
    padding: 1.5rem 2rem;
}

header h1 {
    font-size: clamp(1.5rem, 4vw, 2rem);
    font-weight: 300;
    margin: 0;
}

nav {
    background-color: rgba(0,0,0,0.1);
    padding: 0;
    overflow-x: auto;
    overflow-y: hidden;
    white-space: nowrap;
    /* Smooth scrolling in nav */
    -webkit-overflow-scrolling: touch;
    /* Hide scrollbar but keep functionality */
    scrollbar-width: thin;
    scrollbar-color: rgba(255,255,255,0.3) transparent;
}

nav::-webkit-scrollbar {
    height: 4px;
}

nav::-webkit-scrollbar-track {
    background: transparent;
}

nav::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.3);
    border-radius: 2px;
}

nav a {
    color: rgba(255,255,255,0.9);
    text-decoration: none;
    padding: 1rem 1.5rem;
    display: inline-block;
    transition: background-color 0.3s;
    font-weight: 400;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
    /* Touch-friendly tap targets (min 44x44px) */
    min-height: 44px;
    line-height: 1.2;
}

nav a:hover,
nav a:focus {
    background-color: rgba(255,255,255,0.1);
    outline: none;
}

nav a:active {
    background-color: rgba(255,255,255,0.2);
}

main {
    flex: 1;
    padding: clamp(1rem, 3vw, 2rem);
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

footer {
    background-color: #424242;
    color: rgba(255,255,255,0.8);
    text-align: center;
    padding: 1.5rem;
    margin-top: auto;
}

/* Cards */
.card-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.card {
   
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    transition: all 0.3s cubic-bezier(.25,.8,.25,1);
    overflow: hidden;
}

.card:hover {
    box-shadow: 0 8px 17px rgba(0,0,0,0.2);
    transform: translateY(-4px);
}

.card-content {
    padding: 1.5rem;
}

.card-title {
    font-size: 1.5rem;
    font-weight: 400;
    margin-bottom: 0.5rem;
    color: #333;
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
}

.card-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.card-action {
    border-top: 1px solid rgba(160,160,160,0.2);
    padding: 1rem 1.5rem;
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-decoration: none;
    border-radius: 4px;
    transition: all 0.3s;
    text-transform: uppercase;
    font-weight: 500;
    letter-spacing: 0.5px;
    font-size: 0.9rem;
    box-shadow: 0 2px 5px rgba(0,0,0,0.16);
    /* Touch-friendly minimum size */
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    /* Prevent text selection on tap */
    -webkit-user-select: none;
    user-select: none;
    /* Remove tap highlight */
    -webkit-tap-highlight-color: transparent;
}

.btn:hover,
.btn:focus {
    box-shadow: 0 4px 10px rgba(0,0,0,0.25);
    transform: translateY(-2px);
    outline: 2px solid rgba(102, 126, 234, 0.5);
    outline-offset: 2px;
}

.btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 5px rgba(0,0,0,0.16);
}

h2 {
    font-size: clamp(1.5rem, 4vw, 2rem);
    font-weight: 300;
    color: #424242;
    margin-bottom: 1rem;
}

p {
    color: #757575;
    margin-bottom: 1rem;
}

/* Mobile-specific styles */
@media (max-width: 768px) {
    .header-content {
        padding: 1rem 1.5rem;
    }

    nav a {
        padding: 0.875rem 1.25rem;
        font-size: 0.8rem;
    }

    .card-container {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .card-content {
        padding: 1.25rem;
    }

    .card-title {
        font-size: 1.25rem;
    }

    footer {
        padding: 1.25rem 1rem;
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .header-content {
        padding: 0.875rem 1rem;
    }

    nav a {
        padding: 0.75rem 1rem;
        font-size: 0.75rem;
        letter-spacing: 0.3px;
    }

    .card-content {
        padding: 1rem;
    }

    .card-icon {
        font-size: 2.5rem;
    }

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

/* Landscape orientation fixes for phones */
@media (max-height: 500px) and (orientation: landscape) {
    .header-content {
        padding: 0.75rem 1rem;
    }

    header h1 {
        font-size: 1.25rem;
    }

    nav a {
        padding: 0.625rem 1rem;
    }
}