/* ============================================================
   DID Billing System — Light Theme
   Clair · Fluide · Responsive
   ============================================================ */
@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --font-body: 'DM Sans', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --bg-root: #f4f6fb;
  --bg-surface: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #f9fafe;
  --bg-elevated: #f0f2f8;
  --bg-input: #f7f8fc;

  --border: #e2e6f0;
  --border-light: #d0d5e3;
  --border-focus: #4f7cff;

  --text-primary: #1a1f36;
  --text-secondary: #5a6178;
  --text-muted: #8c92ab;

  --accent: #4f7cff;
  --accent-hover: #3a66e8;
  --accent-glow: rgba(79,124,255,.10);
  --accent-soft: rgba(79,124,255,.06);

  --green: #16a362;
  --green-soft: rgba(22,163,98,.07);
  --green-border: rgba(22,163,98,.22);

  --red: #dc3545;
  --red-soft: rgba(220,53,69,.06);
  --red-border: rgba(220,53,69,.2);

  --amber: #d97706;
  --amber-soft: rgba(217,119,6,.06);
  --amber-border: rgba(217,119,6,.2);

  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --shadow-xs: 0 1px 2px rgba(0,0,0,.04);
  --shadow-sm: 0 1px 4px rgba(0,0,0,.06);
  --shadow: 0 4px 16px rgba(0,0,0,.06);
  --shadow-lg: 0 12px 36px rgba(0,0,0,.08);

  --transition: .2s cubic-bezier(.4,0,.2,1);
  --transition-slow: .35s cubic-bezier(.4,0,.2,1);
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;scroll-behavior:smooth;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
body{font-family:var(--font-body);color:var(--text-primary);background:var(--bg-root);line-height:1.6;min-height:100vh}
a{color:var(--accent);text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--accent-hover)}
img,svg{display:block;max-width:100%}

::-webkit-scrollbar{width:6px;height:6px}
::-webkit-scrollbar-track{background:var(--bg-root)}
::-webkit-scrollbar-thumb{background:var(--border);border-radius:8px}
::-webkit-scrollbar-thumb:hover{background:var(--border-light)}

/* ---- Layout ---- */
.app-layout{display:flex;min-height:100vh}
.sidebar{width:260px;background:var(--bg-surface);border-right:1px solid var(--border);display:flex;flex-direction:column;position:fixed;top:0;left:0;height:100vh;z-index:100;transition:transform var(--transition-slow)}
.sidebar-brand{padding:24px 20px;border-bottom:1px solid var(--border)}
.sidebar-brand h1{font-size:1.1rem;font-weight:700;letter-spacing:-.02em;color:var(--text-primary);display:flex;align-items:center;gap:10px}
.sidebar-brand .brand-icon{width:34px;height:34px;background:linear-gradient(135deg,#4f7cff,#22c983);border-radius:var(--radius-sm);display:grid;place-items:center;font-size:.9rem;color:#fff;flex-shrink:0}
.sidebar-brand small{display:block;color:var(--text-muted);font-size:.72rem;font-weight:500;margin-top:4px;text-transform:uppercase;letter-spacing:.08em}
.sidebar-nav{flex:1;padding:16px 12px;overflow-y:auto}
.nav-section-title{font-size:.65rem;text-transform:uppercase;letter-spacing:.1em;color:var(--text-muted);padding:14px 12px 6px;font-weight:600}
.nav-link{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:var(--radius-sm);color:var(--text-secondary);font-size:.875rem;font-weight:500;transition:all var(--transition);margin-bottom:2px}
.nav-link:hover{color:var(--text-primary);background:var(--bg-elevated)}
.nav-link.active{color:var(--accent);background:var(--accent-glow);font-weight:600}
.nav-link .nav-icon{width:20px;height:20px;display:grid;place-items:center;font-size:.9rem;flex-shrink:0}
.sidebar-footer{padding:16px 12px;border-top:1px solid var(--border)}
.user-card{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:var(--radius-sm);transition:background var(--transition)}
.user-card:hover{background:var(--bg-elevated)}
.user-avatar{width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,#4f7cff,#6366f1);display:grid;place-items:center;color:#fff;font-size:.8rem;font-weight:700;flex-shrink:0}
.user-card .user-info{min-width:0;flex:1}
.user-card .user-name{font-size:.8rem;font-weight:600;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.user-card .user-role{font-size:.68rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.06em}
.main-content{flex:1;margin-left:260px;padding:0;min-height:100vh}
.page-header{padding:28px 32px 20px;border-bottom:1px solid var(--border);background:var(--bg-surface);position:sticky;top:0;z-index:50;backdrop-filter:blur(12px);background:rgba(255,255,255,.85)}
.page-header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.page-title{font-size:1.4rem;font-weight:700;letter-spacing:-.025em;color:var(--text-primary)}
.page-subtitle{font-size:.82rem;color:var(--text-secondary);margin-top:2px}
.page-body{padding:28px 32px}

/* Mobile toggle */
.mobile-toggle{display:none;position:fixed;bottom:20px;right:20px;z-index:200;width:52px;height:52px;border-radius:50%;background:var(--accent);color:#fff;border:none;font-size:1.4rem;box-shadow:var(--shadow-lg);cursor:pointer;transition:transform var(--transition)}
.mobile-toggle:active{transform:scale(.92)}
.sidebar-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.25);backdrop-filter:blur(4px);z-index:99}

/* ---- Cards ---- */
.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:0;box-shadow:var(--shadow-xs);transition:border-color var(--transition),box-shadow var(--transition)}
.card:hover{border-color:var(--border-light);box-shadow:var(--shadow-sm)}
.card-header{padding:18px 22px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;background:var(--bg-card)}
.card-title{font-size:.95rem;font-weight:700;color:var(--text-primary);display:flex;align-items:center;gap:8px}
.card-body{padding:22px}
.card-body-flush{padding:0}

/* ---- Stats ---- */
.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin-bottom:24px}
.stat-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px 22px;box-shadow:var(--shadow-xs);transition:all var(--transition);position:relative;overflow:hidden}
.stat-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;border-radius:3px 3px 0 0;background:linear-gradient(90deg,var(--accent),#22c983);opacity:0;transition:opacity var(--transition)}
.stat-card:hover{border-color:var(--border-light);box-shadow:var(--shadow)}
.stat-card:hover::before{opacity:1}
.stat-label{font-size:.72rem;text-transform:uppercase;letter-spacing:.08em;color:var(--text-muted);font-weight:600;margin-bottom:8px}
.stat-value{font-size:1.6rem;font-weight:700;color:var(--text-primary);letter-spacing:-.03em;line-height:1.2}
.stat-sub{font-size:.78rem;color:var(--text-secondary);margin-top:4px}

/* ---- Tables ---- */
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
table{width:100%;border-collapse:collapse;font-size:.85rem}
thead th{text-align:left;font-size:.7rem;text-transform:uppercase;letter-spacing:.08em;color:var(--text-muted);font-weight:700;padding:14px 18px;background:var(--bg-elevated);border-bottom:1px solid var(--border);white-space:nowrap}
thead th:first-child{border-radius:var(--radius) 0 0 0}
thead th:last-child{border-radius:0 var(--radius) 0 0}
tbody td{padding:14px 18px;border-bottom:1px solid var(--border);color:var(--text-secondary);vertical-align:middle}
tbody tr{transition:background var(--transition)}
tbody tr:hover{background:var(--accent-soft)}
tbody tr:last-child td{border-bottom:none}
.td-primary{color:var(--text-primary);font-weight:600}
.td-mono{font-family:var(--font-mono);font-size:.82rem;letter-spacing:-.01em}

/* ---- Badges ---- */
.badge{display:inline-flex;align-items:center;gap:5px;padding:4px 10px;border-radius:999px;font-size:.7rem;font-weight:700;text-transform:uppercase;letter-spacing:.04em;white-space:nowrap}
.badge-accent{background:var(--accent-glow);color:var(--accent);border:1px solid rgba(79,124,255,.2)}
.badge-green{background:var(--green-soft);color:var(--green);border:1px solid var(--green-border)}
.badge-red{background:var(--red-soft);color:var(--red);border:1px solid var(--red-border)}
.badge-amber{background:var(--amber-soft);color:var(--amber);border:1px solid var(--amber-border)}

/* ---- Buttons ---- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 18px;border-radius:var(--radius);font-family:var(--font-body);font-size:.85rem;font-weight:600;border:1px solid var(--border);background:var(--bg-surface);color:var(--text-primary);cursor:pointer;transition:all var(--transition);white-space:nowrap;text-decoration:none;line-height:1.4}
.btn:hover{background:var(--bg-elevated);border-color:var(--border-light);color:var(--text-primary)}
.btn-primary{background:var(--accent);color:#fff;border-color:var(--accent);box-shadow:0 2px 10px rgba(79,124,255,.2)}
.btn-primary:hover{background:var(--accent-hover);border-color:var(--accent-hover);color:#fff;box-shadow:0 4px 18px rgba(79,124,255,.3)}
.btn-danger{background:transparent;color:var(--red);border-color:var(--red-border)}
.btn-danger:hover{background:var(--red-soft)}
.btn-success{background:var(--green);color:#fff;border-color:var(--green);box-shadow:0 2px 10px rgba(22,163,98,.2)}
.btn-success:hover{background:#12874f;border-color:#12874f;color:#fff}
.btn-sm{padding:6px 12px;font-size:.78rem;border-radius:var(--radius-sm)}
.btn-lg{padding:14px 24px;font-size:.95rem}
.btn-block{width:100%}
.btn-icon{width:38px;height:38px;padding:0}
.btn-group{display:flex;gap:8px;flex-wrap:wrap}

/* ---- Forms ---- */
.form-group{margin-bottom:18px}
.form-label{display:block;font-size:.78rem;font-weight:600;color:var(--text-secondary);margin-bottom:6px;text-transform:uppercase;letter-spacing:.04em}
.form-input,.form-select{width:100%;padding:11px 14px;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius);color:var(--text-primary);font-family:var(--font-body);font-size:.88rem;transition:border-color var(--transition),box-shadow var(--transition);outline:none}
.form-input::placeholder{color:var(--text-muted)}
.form-input:focus,.form-select:focus{border-color:var(--border-focus);box-shadow:0 0 0 3px var(--accent-glow);background:#fff}
.form-select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%238c92ab' viewBox='0 0 16 16'%3E%3Cpath d='M2 5l6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;padding-right:36px;background-color:var(--bg-input)}
.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
.form-hint{font-size:.74rem;color:var(--text-muted);margin-top:4px}

/* ---- Alerts ---- */
.alert{padding:14px 18px;border-radius:var(--radius);font-size:.85rem;display:flex;align-items:flex-start;gap:10px;margin-bottom:18px;line-height:1.5}
.alert-success{background:var(--green-soft);border:1px solid var(--green-border);color:var(--green)}
.alert-error{background:var(--red-soft);border:1px solid var(--red-border);color:var(--red)}
.alert-warning{background:var(--amber-soft);border:1px solid var(--amber-border);color:var(--amber)}
.alert-info{background:var(--accent-glow);border:1px solid rgba(79,124,255,.18);color:var(--accent)}
.alert-icon{font-size:1.1rem;flex-shrink:0;line-height:1;margin-top:2px}
.alert strong{display:block;margin-bottom:2px}

/* ---- Pills ---- */
.pill{display:inline-flex;align-items:center;gap:6px;padding:5px 10px;border-radius:999px;font-size:.75rem;font-weight:600;background:var(--bg-elevated);color:var(--text-secondary);border:1px solid var(--border)}

/* ---- Auth Pages ---- */
.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px;background:linear-gradient(135deg,#f0f4ff 0%,#e8fff4 50%,#f4f6fb 100%)}
.auth-card{width:100%;max-width:420px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-xl);box-shadow:var(--shadow-lg);overflow:hidden}
.auth-header{padding:32px 32px 0;text-align:center}
.auth-logo{width:48px;height:48px;background:linear-gradient(135deg,#4f7cff,#22c983);border-radius:var(--radius);display:grid;place-items:center;margin:0 auto 16px;font-size:1.2rem}
.auth-header h2{font-size:1.3rem;font-weight:700;letter-spacing:-.02em;margin-bottom:4px;color:var(--text-primary)}
.auth-header p{color:var(--text-secondary);font-size:.85rem}
.auth-body{padding:28px 32px 32px}
.auth-footer{padding:16px 32px 24px;text-align:center;font-size:.83rem;color:var(--text-secondary)}

/* ---- Hero / Landing ---- */
.hero-page{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:40px 24px;text-align:center;background:linear-gradient(135deg,#f0f4ff 0%,#e8fff4 50%,#f4f6fb 100%)}
.hero-badge{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;background:var(--accent-glow);border:1px solid rgba(79,124,255,.18);border-radius:999px;font-size:.75rem;font-weight:700;color:var(--accent);text-transform:uppercase;letter-spacing:.06em;margin-bottom:20px}
.hero-title{font-size:clamp(2rem,5vw,3.2rem);font-weight:800;letter-spacing:-.04em;line-height:1.1;margin-bottom:14px;color:var(--text-primary)}
.hero-desc{font-size:1.05rem;color:var(--text-secondary);max-width:500px;margin:0 auto 28px;line-height:1.6}
.hero-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

/* ---- Renew ---- */
.renew-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}
.renew-modal{width:100%;max-width:1000px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-xl);box-shadow:var(--shadow-lg);overflow:hidden}
.renew-header{padding:20px 24px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;background:var(--bg-surface)}
.renew-header-title{font-size:1.1rem;font-weight:700;display:flex;align-items:center;gap:10px}
.renew-body{padding:20px 24px}
.renew-footer{padding:18px 24px;border-top:1px solid var(--border);background:var(--bg-surface);display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.price-box .old-price{font-size:.82rem;color:var(--text-muted);text-decoration:line-through;font-weight:600;display:block}
.price-box .promo-price{font-size:1.5rem;font-weight:800;color:var(--accent);letter-spacing:-.03em;display:block}
.price-box .vat-line{font-size:.75rem;color:var(--text-muted);display:block}

/* ---- Topup cards ---- */
.topup-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-bottom:24px}
.topup-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:22px;text-align:center;box-shadow:var(--shadow-xs);transition:all var(--transition);cursor:pointer;position:relative;overflow:hidden}
.topup-card:hover{border-color:var(--accent);box-shadow:var(--shadow)}
.topup-card.selected{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow);background:var(--accent-soft)}
.topup-card .topup-icon{font-size:1.8rem;margin-bottom:10px;display:block}
.topup-card .topup-name{font-size:.9rem;font-weight:700;color:var(--text-primary);margin-bottom:4px}

/* ---- Extension tags ---- */
.ext-tags{display:flex;flex-wrap:wrap;gap:4px}
.ext-tag{font-size:.65rem;padding:2px 8px;border-radius:999px;font-weight:600;text-transform:uppercase;letter-spacing:.03em;white-space:nowrap}
.ext-yes{background:var(--green-soft);color:var(--green);border:1px solid var(--green-border)}
.ext-no{background:var(--red-soft);color:var(--red);border:1px solid var(--red-border)}

/* ---- Ticket thread ---- */
.ticket-admin{border-left:3px solid var(--accent)}
.ticket-thread .card{transition:none}

/* ---- Checkbox group ---- */
.check-group{display:flex;flex-wrap:wrap;gap:12px}
.check-item{display:flex;align-items:center;gap:6px;font-size:.85rem;color:var(--text-secondary);cursor:pointer}
.check-item input[type=checkbox]{width:18px;height:18px;accent-color:var(--accent);cursor:pointer}
.check-item label{cursor:pointer}
.topup-card .topup-desc{font-size:.75rem;color:var(--text-muted)}

/* ---- Utility ---- */
.flex{display:flex}.flex-wrap{flex-wrap:wrap}.items-center{align-items:center}.justify-between{justify-content:space-between}
.gap-8{gap:8px}.gap-12{gap:12px}.gap-16{gap:16px}.gap-24{gap:24px}
.mt-8{margin-top:8px}.mt-16{margin-top:16px}.mt-24{margin-top:24px}.mb-16{margin-bottom:16px}.mb-24{margin-bottom:24px}
.text-center{text-align:center}.text-right{text-align:right}.text-sm{font-size:.82rem}.text-xs{font-size:.72rem}.text-muted{color:var(--text-secondary)}
.font-mono{font-family:var(--font-mono)}.font-bold{font-weight:700}
.truncate{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.hidden{display:none!important}

/* ---- Animations ---- */
@keyframes fadeInUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
.animate-in{animation:fadeInUp .4s ease both}
.delay-1{animation-delay:.05s}.delay-2{animation-delay:.1s}.delay-3{animation-delay:.15s}.delay-4{animation-delay:.2s}

/* ---- Responsive ---- */
@media(max-width:1024px){
  .sidebar{transform:translateX(-100%)}
  .sidebar.open{transform:translateX(0)}
  .sidebar-overlay.open{display:block}
  .main-content{margin-left:0}
  .mobile-toggle{display:grid;place-items:center}
}
@media(max-width:768px){
  .page-header{padding:20px 18px 16px}
  .page-body{padding:18px}
  .stats-grid{grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:12px}
  .stat-value{font-size:1.3rem}
  .form-grid{grid-template-columns:1fr}
  .topup-grid{grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px}
  .renew-body{padding:16px}
  .renew-footer{flex-direction:column;align-items:stretch;text-align:center}
  .renew-footer .btn-group{justify-content:center}
  table{font-size:.78rem}
  thead th,tbody td{padding:10px 12px}
}
@media(max-width:480px){
  .auth-body{padding:20px}
  .auth-header{padding:24px 20px 0}
  .hero-actions{flex-direction:column;align-items:center}
  .page-header-inner{flex-direction:column;align-items:flex-start}
}
@media print{
  body{background:#fff;color:#000}
  .sidebar,.mobile-toggle,.page-header,.btn{display:none}
  .main-content{margin-left:0}
  .card{border:1px solid #ddd;box-shadow:none}
}