/* Reset and Variables */
:root {
    --font-primary: 'Inter', system-ui, -apple-system, sans-serif;
    --radius-md: 8px;
    --radius-lg: 12px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --transition: 0.3s ease;
}

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

body {
    font-family: var(--font-primary);
    background: radial-gradient(circle, var(--gradient-start), var(--gradient-end));
    color: var(--text-main);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-heading);
}

ul {
    line-height: 1.25;
}

li {
    margin-bottom: 10px;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--text-main);
    opacity: 0.9;
}

/* Layout */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-md);
    flex: 1;
}

header.site-header {
    background-color: var(--bg-surface);
    padding: var(--spacing-md) 0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    text-align: center;
    border-bottom: 2px solid var(--color-accent);
}

header.site-header img.logo {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    margin-bottom: var(--spacing-sm);
    object-fit: contain;
}

.logo-big {
    width: 30%;
    height: auto;
    border-radius: 50%;
    margin-bottom: var(--spacing-sm);
    object-fit: contain;
}

header.site-header h1 {
    font-size: 1.5rem;
    margin-bottom: 0;
}

header.site-header h1 a {
    color: var(--text-heading);
    text-decoration: none;
}

footer.site-footer {
    background-color: var(--bg-surface);
    padding: var(--spacing-lg) var(--spacing-md);
    text-align: center;
    font-size: 0.8rem;
    margin-top: auto;
    border-top: 1px solid var(--border-color);
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-md);
}

/* Components */
.card {
    background-color: var(--bg-surface);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    margin-bottom: var(--spacing-lg);
}

/* Square Tiles with Rounded Corners */
.grid-tiles {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

@media (min-width: 600px) {
    .grid-tiles {
        grid-template-columns: repeat(3, 1fr);
    }
}

.flex-tiles {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-lg);
}

.flex-tiles .tile {
    width: 300px;
    max-width: 100%;
}

.tile {
    background-color: var(--bg-surface);
    border-radius: var(--radius-md);
    min-height: 250px;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: transform var(--transition);
    text-decoration: none;
    color: var(--text-main);
    border: 1px solid var(--border-color);
}

.tile:hover {
    transform: translateY(-4px);
    text-decoration: none;
    border-color: var(--color-accent);
}

.tile img {
    margin-bottom: var(--spacing-md);
}

.tile-icon {
    width: 50%;
    height: auto;
    aspect-ratio: 1;
    object-fit: cover;
    border-radius: 50%;
    margin-bottom: var(--spacing-sm);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.tile span {
    font-weight: 500;
    font-size: 1.1rem;
}

.btn {
    display: inline-block;
    background-color: var(--color-accent);
    color: var(--btn-text);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    border: none;
    transition: opacity var(--transition);
}

.btn:hover {
    opacity: 0.9;
    text-decoration: none;
}

.nav-icon {
    color: var(--color-accent);
    background: transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm);
    transition: opacity var(--transition);
}

.nav-icon:hover {
    opacity: 0.8;
}

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

/* Animations & Loaders */
.loader-ripple {
    display: inline-block;
    position: relative;
    width: 64px;
    height: 64px;
}

.loader-ripple div {
    position: absolute;
    border: 4px solid var(--color-accent);
    opacity: 1;
    border-radius: 50%;
    animation: loader-ripple 1s cubic-bezier(0, 0.2, 0.8, 1) infinite;
}

.loader-ripple div:nth-child(2) {
    animation-delay: -0.5s;
}

@keyframes loader-ripple {
    0% {
        top: 28px;
        left: 28px;
        width: 0;
        height: 0;
        opacity: 0;
    }

    4.9% {
        top: 28px;
        left: 28px;
        width: 0;
        height: 0;
        opacity: 0;
    }

    5% {
        top: 28px;
        left: 28px;
        width: 0;
        height: 0;
        opacity: 1;
    }

    100% {
        top: 0px;
        left: 0px;
        width: 56px;
        height: 56px;
        opacity: 0;
    }
}

/* Responsive */
@media (min-width: 768px) {
    .container {
        padding: var(--spacing-xl);
    }
}