/* =============================================
   ZupX - Light Theme Clean Design
   Simple, Stable, Utility-First
   ============================================= */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* =============================================
   VARIABLES
   ============================================= */
:root {
  --primary: #2c5282;
  --primary-light: #3b82f6;
  --primary-dark: #1e3a5f;
  --primary-bg: #ebf4ff;

  --success: #16a34a;
  --success-bg: #f0fdf4;
  --warning: #d97706;
  --warning-bg: #fffbeb;
  --error: #dc2626;
  --error-bg: #fef2f2;
  --info: #0284c7;

  --bg: #f5f7fa;
  --bg-white: #ffffff;
  --border: #e2e8f0;
  --border-focus: var(--primary);

  --text: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;

  --radius: 6px;
  --radius-lg: 8px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow: 0 1px 4px rgba(0,0,0,0.08);
}

/* =============================================
   RESET
   ============================================= */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{-webkit-font-smoothing:antialiased}
body{font-family:'Inter',system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text);font-size:14px;line-height:1.5;min-height:100vh}
a{color:var(--primary-light);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;display:block}

::-webkit-scrollbar{width:6px;height:6px}
::-webkit-scrollbar-track{background:#f1f5f9}
::-webkit-scrollbar-thumb{background:#cbd5e1;border-radius:3px}

/* =============================================
   NAVBAR
   ============================================= */
.navbar{
  background:var(--primary-dark);
  color:#fff;
  position:sticky;top:0;z-index:100;
  box-shadow:0 2px 8px rgba(0,0,0,0.15);
}
.navbar-top{
  display:flex;align-items:center;justify-content:space-between;
  max-width:1100px;margin:0 auto;padding:10px 20px;
}
.navbar-brand{
  display:flex;align-items:center;gap:8px;
  font-size:1.3rem;font-weight:700;color:#fff;text-decoration:none;letter-spacing:-0.3px;
}
.navbar-brand .logo-icon{
  width:30px;height:30px;background:var(--primary-light);border-radius:5px;
  display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:1rem;color:#fff;
}
.navbar-right{display:flex;align-items:center;gap:8px}
.navbar-right .btn{font-size:0.8rem;padding:6px 14px}

.navbar-menu{
  background:rgba(0,0,0,0.15);
  border-top:1px solid rgba(255,255,255,0.1);
}
.navbar-menu-inner{
  max-width:1100px;margin:0 auto;padding:0 20px;
  display:flex;gap:2px;overflow-x:auto;
  -webkit-overflow-scrolling:touch;
}
.navbar-menu-inner::-webkit-scrollbar{display:none}
.nav-link{
  display:block;padding:10px 14px;color:rgba(255,255,255,0.8);
  font-size:0.8rem;font-weight:500;white-space:nowrap;
  text-transform:uppercase;letter-spacing:0.3px;
  border:none;background:none;cursor:pointer;
  border-bottom:2px solid transparent;
  transition:all 0.2s;text-decoration:none;
}
.nav-link:hover,.nav-link.active{
  color:#fff;background:rgba(255,255,255,0.08);
  border-bottom-color:var(--primary-light);text-decoration:none;
}

.nav-balance-bar{
  background:rgba(255,255,255,0.08);
  border-top:1px solid rgba(255,255,255,0.06);
}
.nav-balance-inner{
  max-width:1100px;margin:0 auto;padding:6px 20px;
  display:flex;align-items:center;justify-content:space-between;
  font-size:0.82rem;color:rgba(255,255,255,0.7);
}
.nav-balance-inner strong{color:#fff}
.nav-balance-inner .balance-amount{
  color:#4ade80;font-weight:700;font-size:0.95rem;
}

.hamburger{
  display:none;background:none;border:none;cursor:pointer;padding:4px;
  flex-direction:column;gap:4px;
}
.hamburger span{display:block;width:22px;height:2px;background:#fff;border-radius:1px}

/* =============================================
   MAIN
   ============================================= */
.main-content{
  max-width:1100px;margin:0 auto;padding:20px;
  min-height:calc(100vh - 140px);
}

/* =============================================
   PAGES
   ============================================= */
.page-section{display:none}
.page-section.active{display:block;animation:fadeIn 0.2s ease}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}

/* =============================================
   AUTH
   ============================================= */
.auth-container{
  display:flex;justify-content:center;padding:40px 0;
}
.auth-card{
  width:100%;max-width:400px;
  background:#fff;border:1px solid var(--border);
  border-radius:var(--radius-lg);padding:32px;
  box-shadow:var(--shadow);
}
.auth-card h2{font-size:1.3rem;font-weight:700;margin-bottom:4px;text-align:center;color:var(--primary-dark)}
.auth-card .auth-sub{text-align:center;color:var(--text-secondary);font-size:0.85rem;margin-bottom:24px}
.auth-switch{text-align:center;margin-top:16px;color:var(--text-secondary);font-size:0.85rem}
.auth-switch a{color:var(--primary-light);font-weight:600;cursor:pointer}

/* =============================================
   FORMS
   ============================================= */
.form-group{margin-bottom:14px}
.form-group label{display:block;margin-bottom:4px;font-size:0.82rem;font-weight:500;color:var(--text-secondary)}
.form-control{
  width:100%;padding:8px 12px;
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  font-size:0.9rem;font-family:inherit;color:var(--text);
  transition:border-color 0.2s;outline:none;
}
.form-control:focus{border-color:var(--primary-light);box-shadow:0 0 0 2px rgba(59,130,246,0.12)}
.form-control::placeholder{color:var(--text-muted)}
select.form-control{cursor:pointer}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.form-hint{font-size:0.75rem;color:var(--text-muted);margin-top:2px}

/* Inline form like gachtheauto */
.inline-form{
  display:flex;gap:8px;align-items:flex-end;flex-wrap:wrap;
  background:#fff;padding:16px;border:1px solid var(--border);
  border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);
}
.inline-form .form-group{margin-bottom:0;flex:1;min-width:120px;display:flex;flex-direction:column}
.inline-form .form-group label{margin-bottom:6px}
.inline-form .form-control {height:42px}
.inline-form .btn {height:42px;display:flex;align-items:center;justify-content:center}

/* =============================================
   BUTTONS
   ============================================= */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:8px 18px;font-size:0.85rem;font-weight:600;font-family:inherit;
  border:1px solid transparent;border-radius:var(--radius);cursor:pointer;
  transition:all 0.15s;white-space:nowrap;text-decoration:none;
}
.btn:disabled{opacity:0.5;cursor:not-allowed}
.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary)}
.btn-primary:hover:not(:disabled){background:var(--primary-dark)}
.btn-submit{background:#e67e22;color:#fff;border-color:#d35400;font-size:0.95rem;padding:10px 28px}
.btn-submit:hover:not(:disabled){background:#d35400}
.btn-success{background:var(--success);color:#fff;border-color:#15803d}
.btn-success:hover:not(:disabled){background:#15803d}
.btn-danger{background:var(--error);color:#fff;border-color:#b91c1c}
.btn-danger:hover:not(:disabled){background:#b91c1c}
.btn-secondary{background:#fff;color:var(--text);border-color:var(--border)}
.btn-secondary:hover:not(:disabled){background:#f8fafc;border-color:#cbd5e1}
.btn-sm{padding:5px 12px;font-size:0.78rem}
.btn-block{width:100%}

/* =============================================
   CARDS
   ============================================= */
.card{
  background:#fff;border:1px solid var(--border);
  border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);
  margin-bottom:16px;
}
.card-header{
  display:flex;align-items:center;justify-content:space-between;
  padding:12px 16px;border-bottom:1px solid var(--border);
  background:#fafbfc;border-radius:var(--radius-lg) var(--radius-lg) 0 0;
}
.card-header h3{font-size:0.95rem;font-weight:700;color:var(--primary-dark)}
.card-body{padding:16px}

/* =============================================
   ALERT BOX (like gachtheauto warnings)
   ============================================= */
.alert{
  padding:10px 14px;border-radius:var(--radius);margin-bottom:14px;
  font-size:0.82rem;line-height:1.6;border:1px solid;
}
.alert-danger{background:var(--error-bg);border-color:#fecaca;color:var(--error)}
.alert-warning{background:var(--warning-bg);border-color:#fde68a;color:#92400e}
.alert-info{background:var(--primary-bg);border-color:#bfdbfe;color:var(--primary)}
.alert-success{background:var(--success-bg);border-color:#bbf7d0;color:#166534}

/* =============================================
   STATS
   ============================================= */
.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px;margin-bottom:16px}
.stat-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:14px 16px;box-shadow:var(--shadow-sm);
}
.stat-card .stat-label{font-size:0.78rem;color:var(--text-secondary);margin-bottom:4px}
.stat-card .stat-value{font-size:1.3rem;font-weight:700;color:var(--text)}
.stat-card.blue .stat-value{color:var(--primary)}
.stat-card.green .stat-value{color:var(--success)}
.stat-card.orange .stat-value{color:var(--warning)}
.stat-card.red .stat-value{color:var(--error)}

/* =============================================
   TABS (like gachtheauto telco tabs)
   ============================================= */
.tabs{display:flex;gap:4px;margin-bottom:14px;flex-wrap:wrap}
.tab-btn{
  padding:6px 16px;background:#fff;border:1px solid var(--border);
  border-radius:var(--radius);font-size:0.82rem;font-weight:500;
  font-family:inherit;cursor:pointer;color:var(--text-secondary);
  transition:all 0.15s;
}
.tab-btn:hover{border-color:var(--primary);color:var(--primary)}
.tab-btn.active{background:var(--primary-dark);color:#fff;border-color:var(--primary-dark)}

.tab-content { display: none; }
.tab-content.active { display: block; animation: fadeIn 0.2s ease; }

/* =============================================
   CARD TYPE GRID
   ============================================= */
.card-type-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:10px;margin-bottom:16px}
.card-type-item{
  background:#f8fafc;border:1px solid var(--border);border-radius:var(--radius);
  padding:12px 10px;text-align:center;cursor:pointer;transition:all 0.15s;
}
.card-type-item:hover{border-color:var(--primary);background:#fff;box-shadow:var(--shadow-sm)}
.card-type-item.selected{border-color:var(--primary);background:var(--primary-bg);box-shadow:0 0 0 2px rgba(59,130,246,0.15)}
.card-type-item .card-type-name{font-weight:700;font-size:0.95rem;color:var(--primary-dark);margin-bottom:2px}
.card-type-item .card-type-rate{color:var(--text-secondary);font-size:0.8rem;font-weight:500}

.amount-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(90px,1fr));gap:6px;margin-bottom:14px}
.amount-item{
  padding:8px 4px;background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  text-align:center;cursor:pointer;font-weight:600;font-size:0.82rem;color:var(--text-secondary);
  transition:all 0.15s;
}
.amount-item:hover{border-color:var(--primary);color:var(--primary)}
.amount-item.selected{border-color:var(--primary);background:var(--primary-bg);color:var(--primary)}

/* =============================================
   GAME GRID
   ============================================= */
.game-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:10px;margin-bottom:16px}
.game-card{
  background:#f8fafc;border:1px solid var(--border);border-radius:var(--radius);
  padding:0;text-align:center;cursor:pointer;transition:all 0.15s;
  display:block;min-height:60px;overflow:hidden;
}
.game-card:hover{border-color:var(--primary);background:#fff;box-shadow:var(--shadow-sm)}
.game-card.selected{border-color:var(--primary);background:var(--primary-bg);color:var(--primary-dark);box-shadow:0 0 0 2px rgba(59,130,246,0.15)}
.game-card .game-name{font-weight:600;font-size:0.95rem;padding:10px;}

/* =============================================
   TABLES
   ============================================= */
.table-wrapper{overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius)}
table{width:100%;border-collapse:collapse}
thead th{
  background:#f8fafc;padding:8px 12px;text-align:left;
  font-size:0.75rem;font-weight:600;color:var(--text-secondary);
  text-transform:uppercase;letter-spacing:0.3px;
  border-bottom:1px solid var(--border);white-space:nowrap;
}
tbody td{padding:8px 12px;font-size:0.85rem;border-bottom:1px solid #f1f5f9;white-space:nowrap}
tbody tr:hover{background:#f8fafc}
tbody tr:last-child td{border-bottom:none}

/* Fee table like gachtheauto */
.fee-table{width:100%;border-collapse:collapse;font-size:0.85rem}
.fee-table th,.fee-table td{padding:8px 12px;text-align:center;border:1px solid var(--border)}
.fee-table th{background:#f8fafc;font-weight:600;color:var(--text-secondary);font-size:0.78rem}
.fee-table td{color:var(--text)}
.fee-table .row-label{text-align:left;font-weight:600;color:var(--primary)}

/* =============================================
   BADGES
   ============================================= */
.badge{
  display:inline-flex;align-items:center;gap:3px;
  padding:2px 8px;font-size:0.72rem;font-weight:600;
  border-radius:10px;white-space:nowrap;
}
.badge-success{background:var(--success-bg);color:var(--success)}
.badge-warning{background:var(--warning-bg);color:var(--warning)}
.badge-error{background:var(--error-bg);color:var(--error)}
.badge-info{background:var(--primary-bg);color:var(--info)}
.badge-pending{background:#fef3c7;color:#92400e}

/* =============================================
   PAGINATION
   ============================================= */
.pagination{display:flex;align-items:center;justify-content:center;gap:4px;margin-top:14px}
.pagination button{
  min-width:30px;height:30px;display:flex;align-items:center;justify-content:center;
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  font-size:0.8rem;cursor:pointer;color:var(--text-secondary);transition:all 0.15s;
}
.pagination button:hover:not(:disabled){border-color:var(--primary);color:var(--primary)}
.pagination button.active{background:var(--primary);color:#fff;border-color:var(--primary)}
.pagination button:disabled{opacity:0.3;cursor:not-allowed}

/* =============================================
   MODAL
   ============================================= */
.modal-overlay{
  display:none;position:fixed;inset:0;background:rgba(0,0,0,0.4);
  z-index:200;align-items:center;justify-content:center;padding:20px;
}
.modal-overlay.active{display:flex}
.modal{
  background:#fff;border-radius:var(--radius-lg);width:100%;max-width:460px;
  max-height:85vh;overflow-y:auto;box-shadow:0 10px 40px rgba(0,0,0,0.15);
}
.modal-header{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 18px;border-bottom:1px solid var(--border);
}
.modal-header h3{font-size:1rem;font-weight:700}
.modal-close{
  width:28px;height:28px;display:flex;align-items:center;justify-content:center;
  background:none;border:none;cursor:pointer;font-size:1.1rem;color:var(--text-muted);
  border-radius:var(--radius);
}
.modal-close:hover{background:#f1f5f9}
.modal-body{padding:18px}
.modal-footer{display:flex;justify-content:flex-end;gap:8px;padding:12px 18px;border-top:1px solid var(--border)}

/* =============================================
   NOTIFICATIONS
   ============================================= */
.notif-panel{
  display:none;position:fixed;top:0;right:0;bottom:0;width:360px;
  background:#fff;border-left:1px solid var(--border);
  box-shadow:-4px 0 20px rgba(0,0,0,0.08);z-index:150;overflow-y:auto;
}
.notif-panel.active{display:block}
.notif-header{
  position:sticky;top:0;display:flex;align-items:center;justify-content:space-between;
  padding:14px 16px;background:#fff;border-bottom:1px solid var(--border);
}
.notif-item{padding:12px 16px;border-bottom:1px solid #f1f5f9}
.notif-item:hover{background:#f8fafc}
.notif-item .notif-title{font-weight:600;font-size:0.85rem;margin-bottom:2px}
.notif-item .notif-message{font-size:0.8rem;color:var(--text-secondary);line-height:1.4}
.notif-item .notif-time{font-size:0.72rem;color:var(--text-muted);margin-top:4px}

/* =============================================
   TOAST
   ============================================= */
.toast-container{position:fixed;top:12px;right:12px;z-index:300;display:flex;flex-direction:column;gap:8px}
.toast{
  display:flex;align-items:flex-start;gap:10px;padding:10px 14px;
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:0 4px 16px rgba(0,0,0,0.1);min-width:280px;max-width:380px;
  animation:toastIn 0.25s ease;border-left:3px solid;
}
.toast.success{border-left-color:var(--success)}
.toast.error{border-left-color:var(--error)}
.toast.warning{border-left-color:var(--warning)}
.toast.info{border-left-color:var(--info)}
@keyframes toastIn{from{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}
@keyframes toastOut{from{opacity:1}to{opacity:0;transform:translateY(-10px)}}
.toast-icon{font-size:1rem;flex-shrink:0;margin-top:1px}
.toast-content{flex:1}
.toast-title{font-weight:600;font-size:0.85rem}
.toast-message{font-size:0.78rem;color:var(--text-secondary)}
.toast-close{background:none;border:none;color:var(--text-muted);cursor:pointer;font-size:0.9rem;padding:0}

/* =============================================
   LOADING
   ============================================= */
.loading-spinner{display:inline-flex;align-items:center;justify-content:center}
.loading-spinner::after{
  content:'';width:18px;height:18px;border:2px solid var(--border);
  border-top-color:var(--primary);border-radius:50%;animation:spin 0.6s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}
.loading-overlay{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;padding:40px;color:var(--text-secondary)}

/* =============================================
   PREVIEW BOX (amount preview)
   ============================================= */
.preview-box{
  background:#f8fafc;border:1px solid var(--border);border-radius:var(--radius);
  padding:12px 14px;margin-bottom:14px;
}
.preview-row{display:flex;justify-content:space-between;padding:4px 0;font-size:0.85rem}
.preview-row .label{color:var(--text-secondary)}
.preview-row .value{font-weight:600}
.preview-row .value.highlight{color:var(--success);font-size:1rem}

/* =============================================
   SECTION HEADER
   ============================================= */
.section-header{
  display:flex;align-items:center;justify-content:space-between;
  margin-bottom:16px;flex-wrap:wrap;gap:10px;
}
.section-header h2{font-size:1.15rem;font-weight:700;color:var(--primary-dark)}

/* =============================================
   FILTER BAR
   ============================================= */
.filter-bar{display:flex;gap:8px;margin-bottom:12px;flex-wrap:wrap}
.filter-bar .form-control{width:auto;min-width:140px;font-size:0.82rem;padding:6px 10px}

/* =============================================
   EMPTY STATE
   ============================================= */
.empty-state{text-align:center;padding:40px 16px;color:var(--text-muted)}
.empty-state .empty-icon{font-size:2rem;margin-bottom:10px;opacity:0.5}
.empty-state .empty-text{font-size:0.9rem;color:var(--text-secondary)}

/* =============================================
   FOOTER
   ============================================= */
.footer{
  background:#fff;border-top:1px solid var(--border);
  padding:20px;margin-top:24px;
}
.footer-inner{
  max-width:1100px;margin:0 auto;
  display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px;
  font-size:0.82rem;color:var(--text-secondary);
}
.footer-inner h4{font-size:0.85rem;color:var(--text);margin-bottom:8px;font-weight:700}
.footer-bottom{
  max-width:1100px;margin:12px auto 0;padding-top:12px;
  border-top:1px solid var(--border);text-align:center;
  font-size:0.78rem;color:var(--text-muted);
}

/* =============================================
   UTILITY
   ============================================= */
.text-center{text-align:center}
.text-success{color:var(--success)}
.text-error{color:var(--error)}
.text-warning{color:var(--warning)}
.text-muted{color:var(--text-muted)}
.fw-600{font-weight:600}
.fw-700{font-weight:700}
.mt-8{margin-top:8px}.mt-16{margin-top:16px}
.mb-8{margin-bottom:8px}.mb-16{margin-bottom:16px}
.hidden{display:none!important}

/* =============================================
   RESPONSIVE
   ============================================= */
.mobile-auth-link { display: none !important; }
@media(max-width:768px){
  .mobile-auth-link { display: block !important; border-top: 1px solid rgba(255,255,255,0.05); }
}
@media(max-width:768px){
  .hamburger{display:flex}
  .navbar-right .guest-nav, .navbar-right .user-nav { display: none !important; }
  .navbar-menu-inner{display:none;flex-direction:column;padding:8px 0}
  .navbar-menu-inner.mobile-open{display:flex}
  .nav-link{padding:10px 16px;border-bottom:none}
  .main-content{padding:12px}
  .form-row{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:1fr 1fr}
  .card-type-grid{grid-template-columns:repeat(4,1fr);gap:8px}
  .amount-grid{grid-template-columns:repeat(3,1fr)}
  .game-grid{grid-template-columns:repeat(3,1fr);gap:8px}
  
  /* Fix: inline-form đổi thẻ trên mobile: xuống dòng thành grid 2 cột */
  .inline-form{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:10px;
    padding:12px;
  }
  .inline-form .form-group{
    margin-bottom:0;
    min-width:unset;
    flex:unset;
  }
  /* Code và Serial chiếm toàn bộ chiều rộng */
  .inline-form .form-group:nth-child(2),
  .inline-form .form-group:nth-child(3){
    grid-column: 1 / -1;
  }
  /* Nút gửi chiếm toàn bộ chiều rộng */
  .inline-form .form-group:last-child{
    grid-column: 1 / -1;
  }
  .inline-form .btn{
    width:100%;
  }

  .inline-form .form-group{min-width:unset}
  .filter-bar{flex-direction:column}
  .filter-bar .form-control{width:100%;min-width:unset}
  .notif-panel{width:100%}
  .footer-inner{grid-template-columns:1fr 1fr}
  .nav-balance-inner{flex-direction:column;gap:4px;text-align:center}
}
@media(max-width:480px){
  .stats-grid{grid-template-columns:1fr}
  .card-type-grid{grid-template-columns:repeat(3,1fr);gap:8px}
  .game-grid{grid-template-columns:repeat(2,1fr);gap:8px}
  .footer-inner{grid-template-columns:1fr}
}