:root {
    --primary: #00E676; /* Vibrant Padel Green */
    --primary-dark: #00C853;
    --secondary: #2979FF; /* Vibrant Blue */
    --bg-dark: #121212;
    --bg-card: #1E1E1E;
    --text-main: #FFFFFF;
    --text-muted: #B0BEC5;
    --border: #333333;
    --font-main: 'Inter', sans-serif;
}

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

body {
    font-family: var(--font-main);
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background-color: rgba(30, 30, 30, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 1rem 0;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-main);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--primary);
}

/* Components */
.btn {
    display: inline-block;
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    border: none;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
}

.btn-primary {
    background-color: var(--primary);
    color: #000;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--primary);
    color: var(--primary);
}

.btn-outline:hover {
    background: rgba(0, 230, 118, 0.1);
}

.card {
    background-color: var(--bg-card);
    border-radius: 12px;
    padding: 1.5rem;
    border: 1px solid var(--border);
    margin-bottom: 1rem;
    transition: transform 0.3s;
}

.card:hover {
    transform: translateY(-4px);
    border-color: var(--primary);
}

/* Forms */
input, select, textarea {
    width: 100%;
    padding: 0.8rem;
    background-color: #2C2C2C;
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-main);
    margin-bottom: 1rem;
    font-family: inherit;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary);
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

th {
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    font-size: 0.85rem;
}

tr:hover {
    background-color: rgba(255, 255, 255, 0.02);
}

/* Utilities */
.text-center { text-align: center; }
.mt-4 { margin-top: 2rem; }
.mb-4 { margin-bottom: 2rem; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.hidden { display: none !important; }

/* Language Switcher */
.lang-switch {
    display: flex;
    gap: 0.5rem;
}

.lang-btn {
    background: none;
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.8rem;
}

.lang-btn.active {
    background-color: var(--primary);
    color: #000;
    border-color: var(--primary);
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    /* Layout */
    .container {
        padding: 0 1rem;
    }

    /* Navigation */
    nav {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-links {
        flex-direction: column;
        width: 100%;
        gap: 0.5rem;
        text-align: center;
    }

    .nav-links a {
        display: block;
        padding: 0.5rem;
        background-color: rgba(255, 255, 255, 0.05);
        border-radius: 6px;
    }

    .lang-switch {
        margin-top: 0.5rem;
    }

    /* Utilities */
    .grid-2 {
        grid-template-columns: 1fr;
    }

    .flex-between {
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
    }

    /* Tables */
    table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
    }
    
    /* Admin Dashboard */
    #dashboard-tabs {
        display: flex;
        overflow-x: auto;
        padding-bottom: 0.5rem;
        margin-bottom: 1rem;
        gap: 0.5rem;
    }
    
    .tab-btn {
        white-space: nowrap;
        padding: 0.5rem 1rem;
        background: rgba(255, 255, 255, 0.05);
        border-radius: 4px;
        border: none;
    }
    
    .tab-btn.active {
        background: var(--primary);
        color: #000;
    }
}