:root {
    --bg-dark: #0f172a;
    --bg-card: rgba(30, 41, 59, 0.7);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --accent: #ec4899;
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

body {
    background: var(--bg-dark);
    background-image: radial-gradient(circle at top right, rgba(59, 130, 246, 0.15), transparent 40%),
                      radial-gradient(circle at bottom left, rgba(236, 72, 153, 0.15), transparent 40%);
    background-attachment: fixed;
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a { text-decoration: none; color: var(--primary); transition: 0.3s ease; }
a:hover { color: var(--accent); }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    width: 100%;
}

.glass-panel {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: var(--glass-shadow);
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar-brand { font-size: 1.5rem; font-weight: 800; background: linear-gradient(to right, var(--primary), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.nav-links a { margin-left: 1.5rem; font-weight: 500; color: var(--text-main); }
.nav-links a:hover { color: var(--primary); }

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.3s ease;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), #60a5fa);
    color: white;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(59, 130, 246, 0.6); }

.btn-accent {
    background: linear-gradient(135deg, var(--accent), #f472b6);
    color: white;
    box-shadow: 0 4px 15px rgba(236, 72, 153, 0.4);
}
.btn-accent:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(236, 72, 153, 0.6); }

/* Forms */
.form-group { margin-bottom: 1.5rem; }
.form-group label { display: block; margin-bottom: 0.5rem; color: var(--text-muted); font-size: 0.9rem; }
.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    background: rgba(0,0,0,0.2);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    color: var(--text-main);
    font-size: 1rem;
    transition: border-color 0.3s;
}
.form-control:focus { outline: none; border-color: var(--primary); background: rgba(0,0,0,0.3); }

/* Grids */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 1.5rem; }

/* Pack Cards */
.pack-card {
    border-radius: 12px;
    overflow: hidden;
    position: relative;
    transition: transform 0.3s;
}
.pack-card:hover { transform: translateY(-5px); }
.pack-image-wrapper {
    width: 100%;
    height: 200px;
    background: #000;
    position: relative;
}
.pack-image-wrapper img { width: 100%; height: 100%; object-fit: cover; opacity: 0.6; }
.pack-image-wrapper.locked img { filter: blur(10px); }
.pack-info { padding: 1.5rem; }
.pack-price { font-size: 1.25rem; font-weight: 700; color: #10b981; margin-top: 0.5rem; }
.locked-overlay {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: rgba(0,0,0,0.4);
    pointer-events: none;
}
.locked-overlay i { font-size: 2rem; color: var(--text-main); margin-bottom: 0.5rem; }

/* Typography Helpers */
.text-center { text-align: center; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.mt-4 { margin-top: 2rem; }

/* Alerts */
.alert { padding: 1rem; border-radius: 8px; margin-bottom: 1rem; }
.alert-error { background: rgba(239, 68, 68, 0.2); border: 1px solid rgba(239, 68, 68, 0.5); color: #fca5a5; }
.alert-success { background: rgba(16, 185, 129, 0.2); border: 1px solid rgba(16, 185, 129, 0.5); color: #6ee7b7; }

/* Mobile Navbar */
@media (max-width: 600px) {
    .navbar {
        flex-direction: row;
        justify-content: space-between;
        padding: 0.5rem 1rem;
        flex-wrap: nowrap;
    }
    .navbar-brand img {
        height: 40px !important; /* reducir logo un poco en móviles */
    }
    .nav-links {
        display: flex;
        flex-wrap: nowrap;
        justify-content: flex-end;
        gap: 8px;
        align-items: center;
    }
    .nav-links a {
        margin-left: 0;
        font-size: 0.8rem !important;
        padding: 5px 10px !important;
        text-align: center;
        white-space: nowrap;
    }
}