:root {
    --feyenoord-red: #E30613;
    --feyenoord-black: #1A1A1A;
    --feyenoord-grey: #F4F4F4;
    --text-dark: #333333;
    --text-muted: #777777;
    --border-color: #E0E0E0;
    --white: #FFFFFF;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    --transition: all 0.3s ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Inter', sans-serif; background-color: var(--feyenoord-grey); color: var(--text-dark); line-height: 1.6; }
a { text-decoration: none; }
.text-red { color: var(--feyenoord-red); }
.text-blue { color: #007bff; }

/* NAVBAR */
.navbar { background-color: var(--feyenoord-black); color: var(--white); padding: 1rem 0; position: sticky; top: 0; z-index: 100; }
.nav-container { max-width: 1200px; margin: 0 auto; padding: 0 20px; display: flex; justify-content: space-between; align-items: center; }
.nav-logo { font-size: 1.8rem; font-weight: 800; color: white; }
.nav-logo span { color: var(--feyenoord-red); }
.nav-menu { list-style: none; display: flex; gap: 1.5rem; }
.nav-link { color: #CCCCCC; font-weight: 600; cursor: pointer; transition: var(--transition); font-size: 0.95rem; }
.nav-link.active, .nav-link:hover { color: white; border-bottom: 2px solid var(--feyenoord-red); }
.nav-admin-link { color: #FFD700 !important; }

/* GENERAL LAYOUT */
.main-content { max-width: 1200px; margin: 2rem auto; padding: 0 20px; min-height: 70vh; }
.page-section { display: none; animation: fadeIn 0.3s ease-in-out; }
.page-section.active { display: block; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.section-header h1 { font-size: 2rem; font-weight: 800; text-transform: uppercase; }
.section-header p { color: var(--text-muted); margin-bottom: 1.5rem; }

.hero-banner { background: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.8)), url('https://images.unsplash.com/photo-1579952363873-27f3bade9f55?q=80&w=1000&auto=format&fit=crop') center/cover; border-radius: 12px; padding: 4rem 2rem; color: var(--white); text-align: center; }
.badge-live { background-color: var(--feyenoord-red); padding: 5px 12px; border-radius: 20px; font-size: 0.8rem; font-weight: 700; display: inline-block; color: white; }

/* TABLES */
.table-container { background: var(--white); border-radius: 12px; padding: 1.5rem; box-shadow: var(--shadow); }
.premium-table { width: 100%; border-collapse: collapse; }
.premium-table th { padding: 1rem; background: var(--feyenoord-black); color: var(--white); text-align: left; }
.premium-table td { padding: 1rem; border-bottom: 1px solid var(--border-color); }
.feyenoord-row { background-color: rgba(227, 6, 19, 0.05) !important; border-left: 4px solid var(--feyenoord-red); font-weight: bold; }

/* SHOP */
.shop-layout { display: grid; grid-template-columns: 1fr; gap: 20px; margin-top: 20px; }
@media(min-width: 768px) { .shop-layout { grid-template-columns: 2fr 1fr; } }
.products-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 20px; }
.product-card { background: white; padding: 15px; border-radius: 12px; box-shadow: var(--shadow); text-align: center; border: 1px solid var(--border-color); }
.product-price { color: var(--feyenoord-red); font-weight: 700; margin-bottom: 10px; font-size: 1.2rem; }
.cart-box { background: white; padding: 20px; border-radius: 12px; box-shadow: var(--shadow); height: fit-content; border-top: 4px solid var(--feyenoord-black); }

/* FORUMS */
.forum-topic-card { background: white; padding: 15px; border-radius: 0 0 8px 8px; margin-bottom: 10px; box-shadow: var(--shadow); border-left: 3px solid var(--feyenoord-red); }

/* FORMS & BUTTONS */
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; margin-bottom: 0.3rem; font-weight: 600; font-size: 0.85rem; }
input, select, textarea { width: 100%; padding: 10px; border: 1px solid var(--border-color); border-radius: 6px; font-family: inherit; }
input:focus, select:focus, textarea:focus { border-color: var(--feyenoord-red); outline: none; }
.btn { display: inline-block; padding: 10px 20px; border: none; border-radius: 6px; font-weight: 600; cursor: pointer; text-align: center; transition: var(--transition); }
.btn-primary { background-color: var(--feyenoord-red); color: var(--white); }
.btn-primary:hover { background-color: #bd050f; }
.btn-block { width: 100%; }

/* ADMIN */
.admin-grid { display: grid; grid-template-columns: 1fr; gap: 1.5rem; margin-top: 20px; }
@media (min-width: 768px) { .admin-grid { grid-template-columns: repeat(2, 1fr); } }
.admin-box { background: var(--white); padding: 1.5rem; border-radius: 12px; box-shadow: var(--shadow); border-top: 4px solid var(--feyenoord-black); }
.wide-admin-box { grid-column: 1 / -1; }
.order-item { background: var(--feyenoord-grey); padding: 15px; border-radius: 8px; border-left: 4px solid var(--feyenoord-red); position: relative; }

/* POPUPS / MODALS */
.payment-modal { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.85); display: flex; justify-content: center; align-items: center; z-index: 9999; }
.payment-modal-content { background: white; padding: 40px; border-radius: 16px; text-align: center; max-width: 400px; width: 90%; }

/* PROMO POPUP BANNER */
.promo-modal { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0, 0, 0, 0.85); display: flex; justify-content: center; align-items: center; z-index: 10000; }
.promo-modal-content { background: var(--feyenoord-black); padding: 25px 20px 20px 20px; border-radius: 12px; position: relative; max-width: 700px; width: 90%; box-shadow: 0 10px 40px rgba(0,0,0,0.6); border: 3px solid var(--feyenoord-red); text-align: center; }
.promo-banner-img { width: 100%; height: auto; border-radius: 6px; display: block; }
.promo-close-x { position: absolute; top: -15px; right: -15px; background: var(--feyenoord-red); color: white; border: 2px solid white; border-radius: 50%; width: 36px; height: 36px; font-size: 1.6rem; cursor: pointer; display: flex; align-items: center; justify-content: center; font-weight: bold; }

/* SIMULATED CLIENT INBOX */
.simulated-mail { background: #fdfdfd; border: 1px solid #e2e8f0; border-radius: 8px; padding: 15px; margin-bottom: 15px; box-shadow: 0 2px 4px rgba(0,0,0,0.02); }
.simulated-mail-header { background: #f1f5f9; padding: 10px 12px; border-radius: 6px; font-size: 0.85rem; margin-bottom: 10px; border-left: 3px solid #007bff; line-height: 1.5; }
.simulated-mail-body { font-size: 0.9rem; white-space: pre-line; background: #fff; padding: 12px; border: 1px dashed #cbd5e1; color: #222; }

/* LOGIN GRID MIXIN */
.login-container { display: flex; flex-wrap: wrap; justify-content: center; gap: 30px; margin-top: 1rem; }
.login-card { background: var(--white); padding: 2rem; border-radius: 12px; box-shadow: var(--shadow); width: 100%; max-width: 420px; border-top: 4px solid var(--feyenoord-red); flex: 1 1 380px; }
.admin-hint { background: #eef2f5; padding: 10px; border-radius: 6px; margin-bottom: 1rem; font-size: 0.85rem; }
.main-footer { text-align: center; padding: 2rem 0; background-color: var(--feyenoord-black); color: var(--text-muted); margin-top: 3rem; font-size: 0.85rem; }