*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#09090b;--surface:#131316;--surface2:#1a1a1f;--border:#232328;--border2:#2e2e35;
  --text:#f0f0f3;--text2:#a1a1aa;--dim:#63636e;
  --accent:#22c55e;--accent-dim:#16a34a;--accent-glow:rgba(34,197,94,0.15);
  --danger:#ef4444;--danger-glow:rgba(239,68,68,0.15);
  --warn:#f59e0b;--warn-glow:rgba(245,158,11,0.15);
  --blue:#3b82f6;--blue-dim:#2563eb;--blue-glow:rgba(59,130,246,0.12);
  --radius:12px;--radius-lg:16px;
  --font:'Inter',system-ui,-apple-system,sans-serif;
  --font-mono:'JetBrains Mono','SF Mono','Fira Code',monospace;
  --shadow-sm:0 1px 2px rgba(0,0,0,0.4);
  --shadow:0 4px 12px rgba(0,0,0,0.3),0 1px 3px rgba(0,0,0,0.2);
  --shadow-lg:0 8px 32px rgba(0,0,0,0.4),0 2px 8px rgba(0,0,0,0.3);
}
html{height:100%}
body{
  font-family:var(--font);background:var(--bg);color:var(--text);
  min-height:100%;-webkit-tap-highlight-color:transparent;
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -20%,rgba(34,197,94,0.04),transparent),
    radial-gradient(ellipse 60% 40% at 80% 100%,rgba(59,130,246,0.03),transparent);
}

/* ========== Animations ========== */
@keyframes fadeIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
@keyframes fadeInScale{from{opacity:0;transform:scale(0.96)}to{opacity:1;transform:scale(1)}}
@keyframes pulse-dot{0%,100%{opacity:1}50%{opacity:0.5}}
@keyframes shimmer{0%{background-position:-200% 0}100%{background-position:200% 0}}
@keyframes timer-pulse{0%,100%{filter:drop-shadow(0 0 4px var(--danger-glow))}50%{filter:drop-shadow(0 0 12px var(--danger))}}

/* ========== Shared top bar & brand ========== */
.brand-sm{
  font-size:13px;font-weight:600;letter-spacing:5px;text-transform:uppercase;
  color:var(--accent);
  display:inline-flex;align-items:center;gap:10px;
}
.brand-sm::before{
  content:'';display:inline-block;width:8px;height:8px;
  background:var(--accent);border-radius:50%;
  box-shadow:0 0 8px var(--accent),0 0 16px var(--accent-glow);
}
.page-top-bar{
  display:flex;align-items:center;justify-content:space-between;
  width:100%;margin-bottom:24px;
}
.user-pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:4px 6px 4px 4px;border-radius:100px;
  background:var(--surface);border:1px solid var(--border);
  font-size:12px;font-weight:500;color:var(--text2);
  opacity:0;transition:opacity 0.3s;
}
.user-pill.visible{opacity:1}
.user-avatar{
  width:26px;height:26px;border-radius:50%;
  background:linear-gradient(135deg,var(--accent-dim),var(--blue-dim));
  display:flex;align-items:center;justify-content:center;
  font-size:11px;font-weight:700;color:#fff;
  flex-shrink:0;
}
.logout-btn{
  background:none;border:none;cursor:pointer;
  padding:4px;border-radius:6px;display:flex;align-items:center;justify-content:center;
  color:var(--dim);transition:all 0.2s;
}
.logout-btn:hover{color:var(--danger);background:var(--danger-glow)}
.logout-btn svg{width:15px;height:15px}

/* ========== Locker Page (user view) ========== */
.locker-page{
  max-width:440px;margin:0 auto;padding:32px 24px 60px;
  display:flex;flex-direction:column;align-items:center;
  animation:fadeIn 0.35s ease-out;
}

.locker-header{text-align:center;margin-bottom:8px}
.locker-label{
  font-size:11px;font-weight:600;letter-spacing:4px;text-transform:uppercase;
  color:var(--dim);margin-bottom:4px;
}
.locker-number{
  font-size:42px;font-weight:800;line-height:1.1;letter-spacing:-1px;
  background:linear-gradient(180deg,var(--text) 30%,var(--text2));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  background-clip:text;word-break:break-word;text-align:center;
}
.locker-status-badge{
  display:inline-flex;align-items:center;gap:6px;margin-top:12px;
  font-size:11px;font-weight:600;letter-spacing:1.5px;text-transform:uppercase;
  padding:5px 14px;border-radius:100px;
}
.locker-status-badge::before{
  content:'';width:6px;height:6px;border-radius:50%;flex-shrink:0;
}
.locker-status-badge.mine{color:var(--accent);background:var(--accent-glow)}
.locker-status-badge.mine::before{background:var(--accent);animation:pulse-dot 2s ease-in-out infinite}
.locker-status-badge.available{color:var(--accent);background:var(--accent-glow)}
.locker-status-badge.available::before{background:var(--accent)}

.divider{
  width:100%;height:1px;margin:24px 0;
  background:linear-gradient(90deg,transparent,var(--border),transparent);
}

/* Timer */
.timer-container{
  display:flex;align-items:center;justify-content:center;gap:14px;
  margin-bottom:24px;padding:14px 24px;
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);width:100%;
}
.timer-ring{width:40px;height:40px;flex-shrink:0}
.timer-ring svg{transform:rotate(-90deg)}
.timer-ring circle{fill:none;stroke-width:2.5;stroke-linecap:round}
.timer-track{stroke:var(--border)}
.timer-fill{
  stroke:var(--accent);
  stroke-dasharray:100.53;stroke-dashoffset:0;
  transition:stroke-dashoffset 0.3s linear,stroke 0.4s;
}
.timer-fill.warn{stroke:var(--warn)}
.timer-fill.danger{stroke:var(--danger);animation:timer-pulse 1s ease-in-out infinite}
.timer-info{display:flex;flex-direction:column}
.timer-secs{
  font-size:24px;font-weight:700;line-height:1;
  font-family:var(--font-mono);letter-spacing:-0.5px;
}
.timer-label{
  font-size:10px;font-weight:600;letter-spacing:2px;text-transform:uppercase;
  color:var(--dim);margin-top:2px;
}

/* PIN cards */
.pin-section{width:100%;display:flex;flex-direction:column;gap:12px;margin-bottom:24px}
.pin-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:20px 24px;text-align:center;
  position:relative;overflow:hidden;
  transition:border-color 0.3s;
}
.pin-card::before{
  content:'';position:absolute;inset:0;pointer-events:none;
}
.pin-card.checkout::before{
  background:linear-gradient(180deg,rgba(59,130,246,0.04),transparent 60%);
}
.pin-card.return::before{
  background:linear-gradient(180deg,rgba(245,158,11,0.04),transparent 60%);
}
.pin-card.checkout{border-color:rgba(59,130,246,0.15)}
.pin-card.return{border-color:rgba(245,158,11,0.15)}
.pin-card-label{
  font-size:10px;font-weight:700;letter-spacing:3px;text-transform:uppercase;
  margin-bottom:14px;
}
.pin-card-label.checkout{color:var(--blue)}
.pin-card-label.return{color:var(--warn)}
.pin-digits{
  display:flex;gap:8px;justify-content:center;
}
.pin-digit{
  width:56px;height:68px;
  background:var(--bg);border:1.5px solid var(--border);border-radius:10px;
  display:flex;align-items:center;justify-content:center;
  font-size:28px;font-weight:700;
  font-family:var(--font-mono);
  transition:all 0.3s;
  position:relative;
}
.pin-card.checkout .pin-digit{
  border-color:rgba(59,130,246,0.2);color:var(--blue);
  box-shadow:0 2px 8px rgba(59,130,246,0.06);
}
.pin-card.return .pin-digit{
  border-color:rgba(245,158,11,0.2);color:var(--warn);
  box-shadow:0 2px 8px rgba(245,158,11,0.06);
}
.pin-digit.refreshing{animation:fadeInScale 0.25s ease-out}
.pin-hint{font-size:11px;color:var(--dim);margin-top:12px;font-weight:400}

/* Action buttons */
.action-btn{
  width:100%;height:52px;border-radius:var(--radius);
  font-family:var(--font);font-size:13px;font-weight:700;
  letter-spacing:2px;text-transform:uppercase;cursor:pointer;
  transition:all 0.25s cubic-bezier(0.4,0,0.2,1);
  border:none;position:relative;overflow:hidden;
}
.action-btn::after{
  content:'';position:absolute;inset:0;
  background:radial-gradient(circle at var(--x,50%) var(--y,50%),rgba(255,255,255,0.1),transparent 60%);
  opacity:0;transition:opacity 0.3s;
}
.action-btn:hover::after{opacity:1}
.action-btn:active{transform:scale(0.98)}
.action-btn:disabled{opacity:0.3;cursor:default;transform:none}
.action-btn:disabled::after{display:none}

.rent-btn{
  background:var(--accent);color:var(--bg);
  box-shadow:0 2px 12px var(--accent-glow),0 0 0 1px var(--accent-dim) inset;
}
.rent-btn:not(:disabled):hover{
  box-shadow:0 4px 20px rgba(34,197,94,0.3),0 0 0 1px var(--accent) inset;
  filter:brightness(1.1);
}

.return-btn{
  background:transparent;color:var(--warn);
  border:1.5px solid rgba(245,158,11,0.3);
}
.return-btn:not(:disabled):hover{
  background:var(--warn);color:var(--bg);
  box-shadow:0 4px 20px var(--warn-glow);
}

/* Available / empty state prompt */
.available-prompt{
  text-align:center;padding:32px 0;width:100%;
}
.available-prompt .prompt-icon{
  width:64px;height:64px;margin:0 auto 20px;
  border-radius:20px;background:var(--accent-glow);
  display:flex;align-items:center;justify-content:center;
  border:1px solid rgba(34,197,94,0.15);
}
.available-prompt .prompt-icon svg{width:28px;height:28px;color:var(--accent);stroke-width:1.5}
.available-prompt p{
  color:var(--text2);font-size:14px;line-height:1.6;margin-bottom:24px;
}

/* ========== Auth Page ========== */
.auth-page{
  min-height:100vh;display:flex;flex-direction:column;
  align-items:center;justify-content:center;
  padding:40px 24px;animation:fadeIn 0.4s ease-out;
}
.auth-brand{text-align:center;margin-bottom:32px}
.auth-logo{
  width:56px;height:56px;margin:0 auto 16px;
  border-radius:16px;background:var(--accent-glow);
  display:flex;align-items:center;justify-content:center;
  border:1px solid rgba(34,197,94,0.15);
}
.auth-logo svg{width:28px;height:28px;color:var(--accent);stroke-width:1.5}
.auth-brand h1{
  font-size:13px;font-weight:600;letter-spacing:5px;text-transform:uppercase;
  color:var(--accent);margin-bottom:6px;
}
.auth-brand p{font-size:14px;color:var(--text2)}

.auth-card{
  width:100%;max-width:380px;
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:24px;position:relative;overflow:hidden;
}
.auth-card::before{
  content:'';position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(circle at 50% 0%,rgba(255,255,255,0.03),transparent 60%);
}
.auth-tabs{
  display:flex;gap:4px;margin-bottom:24px;
  background:var(--bg);border-radius:10px;padding:3px;
}
.auth-tab{
  flex:1;padding:9px 0;border:none;border-radius:8px;
  background:transparent;cursor:pointer;
  font-family:var(--font);font-size:13px;font-weight:600;color:var(--dim);
  transition:all 0.2s;
}
.auth-tab:hover{color:var(--text2)}
.auth-tab.active{background:var(--surface2);color:var(--text);box-shadow:var(--shadow-sm)}

.form-group{margin-bottom:16px}
.form-group label{
  display:block;font-size:12px;font-weight:600;
  color:var(--text2);margin-bottom:6px;letter-spacing:0.5px;
}
.form-group input{
  width:100%;height:44px;padding:0 14px;
  background:var(--bg);border:1.5px solid var(--border);border-radius:10px;
  color:var(--text);font-family:var(--font);font-size:14px;
  transition:all 0.2s;outline:none;
}
.form-group input::placeholder{color:var(--dim)}
.form-group input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow)}

.auth-error{
  background:var(--danger-glow);border:1px solid rgba(239,68,68,0.2);
  border-radius:10px;padding:10px 14px;margin-bottom:16px;
  font-size:13px;color:var(--danger);font-weight:500;
}
.auth-card .action-btn{margin-top:4px}

/* ========== Admin Page ========== */
.admin-page{
  max-width:900px;margin:0 auto;padding:32px 24px 60px;
  animation:fadeIn 0.4s ease-out;
}
.admin-top-bar{
  display:flex;align-items:center;justify-content:space-between;
  margin-bottom:32px;
}
.admin-top-bar > div:first-child{display:flex;align-items:center;gap:12px}
.admin-badge{
  font-size:10px;font-weight:700;letter-spacing:1.5px;text-transform:uppercase;
  padding:3px 10px;border-radius:100px;
  color:var(--blue);background:var(--blue-glow);
}

/* Stats bar */
.stats-bar{
  display:flex;gap:12px;margin-bottom:28px;
}
.stat-card{
  flex:1;background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);padding:16px 20px;text-align:center;
  position:relative;overflow:hidden;
}
.stat-card::before{
  content:'';position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(circle at 50% 0%,rgba(255,255,255,0.02),transparent 70%);
}
.stat-value{
  font-size:28px;font-weight:800;line-height:1;
  font-family:var(--font-mono);
}
.stat-label{
  font-size:10px;font-weight:600;letter-spacing:2px;text-transform:uppercase;
  color:var(--dim);margin-top:6px;
}
.stat-card.available .stat-value{color:var(--accent)}
.stat-card.rented .stat-value{color:var(--warn)}

/* Admin table */
.admin-table-wrap{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius-lg);overflow:hidden;
}
.admin-table{
  width:100%;border-collapse:collapse;
  font-size:13px;
}
.admin-table thead{
  background:var(--surface2);
}
.admin-table th{
  padding:12px 16px;text-align:left;
  font-size:10px;font-weight:700;letter-spacing:2px;text-transform:uppercase;
  color:var(--dim);border-bottom:1px solid var(--border);
}
.admin-table td{
  padding:14px 16px;border-bottom:1px solid var(--border);
  vertical-align:middle;
}
.admin-table tbody tr:last-child td{border-bottom:none}
.admin-table tbody tr{transition:background 0.15s}
.admin-table tbody tr:hover{background:var(--surface2)}

.cell-name{font-weight:600;color:var(--text)}
.cell-user{color:var(--text2)}
.cell-duration{
  font-family:var(--font-mono);font-size:12px;
  color:var(--text2);letter-spacing:0.3px;
}
.cell-action{text-align:right;width:1%;white-space:nowrap}

.table-badge{
  font-size:10px;font-weight:600;letter-spacing:1.5px;text-transform:uppercase;
  padding:3px 10px;border-radius:100px;
  display:inline-flex;align-items:center;gap:5px;
}
.table-badge::before{
  content:'';width:5px;height:5px;border-radius:50%;flex-shrink:0;
}
.table-badge.available{color:var(--accent);background:var(--accent-glow)}
.table-badge.available::before{background:var(--accent)}
.table-badge.rented{color:var(--warn);background:var(--warn-glow)}
.table-badge.rented::before{background:var(--warn);animation:pulse-dot 2s ease-in-out infinite}

.release-btn{
  padding:6px 14px;border-radius:8px;border:1px solid rgba(239,68,68,0.25);
  background:transparent;color:var(--danger);cursor:pointer;
  font-family:var(--font);font-size:11px;font-weight:600;letter-spacing:1px;
  text-transform:uppercase;transition:all 0.2s;
}
.release-btn:hover{background:var(--danger);color:#fff;box-shadow:0 2px 12px var(--danger-glow)}
.release-btn:disabled{opacity:0.3;cursor:default}

/* Admin actions bar */
.admin-actions-bar{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-bottom:20px;flex-wrap:wrap;
}
.provision-form{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.admin-input{
  height:38px;padding:0 12px;
  background:var(--surface);border:1.5px solid var(--border);border-radius:8px;
  color:var(--text);font-family:var(--font);font-size:13px;
  transition:border-color 0.2s;outline:none;
}
.admin-input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow)}
.admin-input::placeholder{color:var(--dim)}
.admin-input-sm{width:70px}
.admin-btn{
  height:38px;padding:0 16px;border-radius:8px;border:none;cursor:pointer;
  font-family:var(--font);font-size:12px;font-weight:600;letter-spacing:0.5px;
  transition:all 0.2s;white-space:nowrap;
}
.admin-btn.primary{
  background:var(--accent);color:var(--bg);
  box-shadow:0 2px 8px var(--accent-glow);
}
.admin-btn.primary:hover{filter:brightness(1.1)}
.admin-btn.primary:disabled{opacity:0.4;cursor:default;filter:none}
.admin-btn.secondary{
  background:var(--surface);color:var(--text2);border:1px solid var(--border);
}
.admin-btn.secondary:hover{background:var(--surface2);color:var(--text)}
.admin-btn-sm{height:32px;padding:0 12px;font-size:11px}

/* Modal rename & title row */
.modal-title-row{
  display:flex;align-items:center;justify-content:center;gap:8px;
  margin-bottom:20px;
}
.modal-title-row .modal-title{margin-bottom:0}
.rename-trigger{
  background:none;border:none;cursor:pointer;color:var(--dim);
  padding:4px;border-radius:6px;display:flex;align-items:center;
  transition:all 0.2s;
}
.rename-trigger:hover{color:var(--text);background:var(--surface2)}
.rename-row{
  display:flex;gap:8px;align-items:center;margin-bottom:16px;
  justify-content:center;
}
.rename-row .admin-input{flex:1;max-width:200px}

/* Code modal */
.modal-overlay{
  position:fixed;inset:0;background:rgba(0,0,0,0.6);backdrop-filter:blur(4px);
  display:flex;align-items:center;justify-content:center;z-index:100;
  opacity:0;pointer-events:none;transition:opacity 0.2s;
  padding:24px;
}
.modal-overlay.visible{opacity:1;pointer-events:auto}
.modal-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:32px;width:100%;max-width:400px;position:relative;
  animation:fadeInScale 0.25s ease-out;
}
.modal-close{
  position:absolute;top:12px;right:14px;background:none;border:none;
  color:var(--dim);font-size:22px;cursor:pointer;padding:4px 8px;
  border-radius:6px;transition:all 0.2s;line-height:1;
}
.modal-close:hover{color:var(--text);background:var(--surface2)}
.modal-title{
  font-size:18px;font-weight:700;margin-bottom:24px;text-align:center;
}
.code-display-row{
  display:flex;gap:12px;margin-bottom:20px;
}
.code-block{
  flex:1;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);
  padding:16px;text-align:center;
}
.code-label{
  font-size:10px;font-weight:700;letter-spacing:2px;text-transform:uppercase;
  color:var(--dim);margin-bottom:10px;
}
.code-display-row .code-block:first-child .code-label{color:var(--blue)}
.code-display-row .code-block:first-child{border-color:rgba(59,130,246,0.15)}
.code-display-row .code-block:last-child .code-label{color:var(--warn)}
.code-display-row .code-block:last-child{border-color:rgba(245,158,11,0.15)}
.code-value{
  font-size:28px;font-weight:700;letter-spacing:4px;
}
.code-display-row .code-block:first-child .code-value{color:var(--blue)}
.code-display-row .code-block:last-child .code-value{color:var(--warn)}
.mono{font-family:var(--font-mono)}
.code-timer{
  text-align:center;font-size:12px;color:var(--dim);font-weight:500;
}

/* Loading skeleton */
.skeleton{
  background:linear-gradient(90deg,var(--surface) 25%,var(--surface2) 50%,var(--surface) 75%);
  background-size:200% 100%;
  animation:shimmer 1.5s infinite;
  border-radius:var(--radius);
}

/* States */
.hidden{display:none!important}

/* ========== Responsive ========== */
@media(max-width:640px){
  .admin-page{padding:20px 16px 48px}
  .stats-bar{gap:8px}
  .stat-card{padding:12px 10px}
  .stat-value{font-size:22px}
  .admin-table{font-size:12px}
  .admin-table th,.admin-table td{padding:10px 12px}
  .cell-duration{display:none}
  .admin-table th:nth-child(4){display:none}
  .admin-actions-bar{flex-direction:column;align-items:stretch}
  .provision-form{flex-wrap:wrap}
  .admin-input{flex:1;min-width:0}
}
@media(max-width:480px){
  .locker-page{padding:24px 16px 48px}
  .locker-number{font-size:56px}
  .pin-digit{width:48px;height:58px;font-size:24px}
  .timer-container{padding:12px 16px}
  .auth-page{padding:28px 16px;justify-content:flex-start;padding-top:80px}
  .auth-card{padding:20px}
}