/* OPTIMIZED BUILD */
/* ═══════════════════════════════════════════════════════════════
   ISABEL ANTIQUES — admin.css (HELIX TRINITY ROOT v16) — v2
   Panel de Gestión · Tema Dark Museum — REESCRITO
   ═══════════════════════════════════════════════════════════════ */

:root {
  --color-primary:        #8B0000;
  --color-primary-light:  #A30000;
  --color-bg:             #0A0A0A;
  --color-surface:        #141414;
  --color-surface-2:      #1C1C1C;
  --color-surface-3:      #242424;
  --color-border:         rgba(255,255,255,0.07);
  --color-border-hover:   rgba(255,255,255,0.13);
  --color-text:           #EFEFEF;
  --color-text-secondary: rgba(255,255,255,0.42);
  --color-text-muted:     rgba(255,255,255,0.2);
  --color-success:        #10B981;
  --color-error:          #EF4444;
  --color-warning:        #F59E0B;
  --color-info:           #3B82F6;
  --font-display:         'Playfair Display', Georgia, serif;
  --font-primary:         'Inter', system-ui, sans-serif;
  --sidebar-w:            220px;
  --sp-1:.25rem;--sp-2:.5rem;--sp-3:.75rem;--sp-4:1rem;--sp-5:1.25rem;
  --sp-6:1.5rem;--sp-8:2rem;--sp-10:2.5rem;--sp-12:3rem;
}

/* ── RESET ──────────────────────────────────────────────────── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html,body{height:100%;font-family:var(--font-primary);background:var(--color-bg);color:var(--color-text);font-size:14px;line-height:1.5;-webkit-font-smoothing:antialiased;}
img{max-width:100%;display:block;}
button{font-family:var(--font-primary);}
:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px;}
.hidden{display:none!important;}

/* ── SCROLLBAR ──────────────────────────────────────────────── */
::-webkit-scrollbar{width:5px;height:5px;}
::-webkit-scrollbar-track{background:var(--color-bg);}
::-webkit-scrollbar-thumb{background:rgba(255,255,255,0.09);border-radius:3px;}
::-webkit-scrollbar-thumb:hover{background:rgba(255,255,255,0.16);}

/* ── SPINNER ────────────────────────────────────────────────── */
.spinner{width:16px;height:16px;border:2px solid transparent;border-top-color:currentColor;border-radius:50%;animation:spin .6s linear infinite;display:inline-block;}
@keyframes spin{to{transform:rotate(360deg);}}

/* ── TOAST ──────────────────────────────────────────────────── */
.toast-container{position:fixed;top:var(--sp-6);right:var(--sp-6);z-index:9999;display:flex;flex-direction:column;gap:var(--sp-2);pointer-events:none;}
.toast{padding:var(--sp-3) var(--sp-5);font-size:.8rem;font-weight:500;color:var(--color-text);box-shadow:0 8px 30px rgba(0,0,0,.5);pointer-events:auto;animation:toastIn .3s ease forwards;max-width:340px;border-left:3px solid transparent;background:var(--color-surface-2);}
.toast.success{border-color:var(--color-success);}
.toast.error{border-color:var(--color-error);}
.toast.warning{border-color:var(--color-warning);}
.toast.info{border-color:var(--color-info);}
.toast.hiding{animation:toastOut .3s ease forwards;}
@keyframes toastIn{from{opacity:0;transform:translateX(16px);}to{opacity:1;transform:translateX(0);}}
@keyframes toastOut{from{opacity:1;transform:translateX(0);}to{opacity:0;transform:translateX(16px);}}

/* ════════════════════════════════════════════════════════════
   LOGIN
   ════════════════════════════════════════════════════════════ */
.login-screen{
  min-height:100vh;display:flex;align-items:center;justify-content:center;padding:var(--sp-6);
  background:radial-gradient(ellipse 60% 50% at 20% 60%,rgba(139,0,0,.12) 0%,transparent 70%),var(--color-bg);
}
.login-card{
  width:100%;max-width:400px;
  background:var(--color-surface);border:1px solid var(--color-border);
  padding:var(--sp-12) var(--sp-8);
  box-shadow:0 40px 100px rgba(0,0,0,.6);
}
.login-logo{font-family:var(--font-display);font-size:1.75rem;font-weight:700;letter-spacing:.2em;color:var(--color-text);text-align:center;line-height:1;margin-bottom:var(--sp-2);}
.login-logo em{font-weight:400;font-style:italic;font-size:.85em;color:rgba(255,255,255,.45);}
.login-sub{text-align:center;font-size:.63rem;letter-spacing:.25em;text-transform:uppercase;color:var(--color-text-secondary);margin-bottom:var(--sp-10);}
.login-form{display:flex;flex-direction:column;gap:var(--sp-4);}
.login-error{font-size:.78rem;color:var(--color-error);background:rgba(239,68,68,.07);border:1px solid rgba(239,68,68,.18);padding:var(--sp-3) var(--sp-4);text-align:center;line-height:1.5;}
#btn-login{width:100%;justify-content:center;padding:var(--sp-4);margin-top:var(--sp-2);font-size:.75rem;}

/* ════════════════════════════════════════════════════════════
   BOTONES
   ════════════════════════════════════════════════════════════ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:var(--sp-2);
  padding:var(--sp-3) var(--sp-6);font-family:var(--font-primary);
  font-size:.72rem;font-weight:600;letter-spacing:.12em;text-transform:uppercase;
  border:1px solid transparent;cursor:pointer;transition:all .2s ease;
  text-decoration:none;white-space:nowrap;line-height:1;
}
.btn-primary{background:var(--color-primary);color:white;border-color:var(--color-primary);}
.btn-primary:hover{background:var(--color-primary-light);border-color:var(--color-primary-light);}
.btn-secondary{background:transparent;color:var(--color-text-secondary);border-color:var(--color-border);}
.btn-secondary:hover{background:var(--color-surface-3);color:var(--color-text);border-color:var(--color-border-hover);}
.btn[disabled]{opacity:.4;pointer-events:none;}

.btn-sm{
  padding:4px 10px;font-size:.67rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;
  border:1px solid var(--color-border);background:transparent;color:var(--color-text-secondary);
  cursor:pointer;transition:all .18s;font-family:var(--font-primary);white-space:nowrap;
}
.btn-sm:hover{background:var(--color-surface-3);color:var(--color-text);border-color:var(--color-border-hover);}
.btn-sm-danger{border-color:rgba(239,68,68,.22);color:rgba(239,68,68,.55);}
.btn-sm-danger:hover{background:rgba(239,68,68,.08);color:var(--color-error);border-color:rgba(239,68,68,.45);}

/* ── alias para admin.js que usa btn-icon-sm ── */
.btn-icon-sm{
  padding:4px 10px;font-size:.67rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;
  border:1px solid var(--color-border);background:transparent;color:var(--color-text-secondary);
  cursor:pointer;transition:all .18s;font-family:var(--font-primary);white-space:nowrap;
}
.btn-icon-sm:hover{background:var(--color-surface-3);color:var(--color-text);border-color:var(--color-border-hover);}
.btn-danger{border-color:rgba(239,68,68,.22)!important;color:rgba(239,68,68,.55)!important;}
.btn-danger:hover{background:rgba(239,68,68,.08)!important;color:var(--color-error)!important;border-color:rgba(239,68,68,.45)!important;}

.btn-icon{
  width:38px;height:38px;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  background:var(--color-surface-3);border:1px solid var(--color-border);
  color:var(--color-text-secondary);font-size:1.2rem;cursor:pointer;transition:all .2s;
}
.btn-icon:hover{background:var(--color-primary);color:white;border-color:var(--color-primary);}

/* ════════════════════════════════════════════════════════════
   CAMPOS
   ════════════════════════════════════════════════════════════ */
.field-group{display:flex;flex-direction:column;gap:var(--sp-2);}
.field-label{font-size:.67rem;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--color-text-secondary);}
.field-input{
  width:100%;background:var(--color-bg);border:1px solid var(--color-border);
  padding:10px var(--sp-4);font-size:.875rem;font-family:var(--font-primary);
  color:var(--color-text);outline:none;transition:border-color .2s;appearance:none;
}
.field-input::placeholder{color:var(--color-text-muted);}
.field-input:focus{border-color:rgba(255,255,255,.22);}
.field-input.input-error{border-color:rgba(239,68,68,.5);}
textarea.field-input{resize:vertical;min-height:110px;line-height:1.6;}
select.field-input{
  cursor:pointer;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='rgba(255,255,255,0.3)' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 12px center;padding-right:36px;
}
select.field-input option{background:var(--color-surface-2);}
.field-hint{font-size:.68rem;color:var(--color-text-muted);line-height:1.5;}

/* ════════════════════════════════════════════════════════════
   LAYOUT: SIDEBAR + MAIN
   ════════════════════════════════════════════════════════════ */
.dashboard{
  display:flex;
  min-height:100vh;
}

/* ── SIDEBAR ──────────────────────────────────────────────── */
.sidebar{
  width:var(--sidebar-w);
  flex-shrink:0;
  background:var(--color-surface);
  border-right:1px solid var(--color-border);
  position:fixed;left:0;top:0;bottom:0;
  display:flex;flex-direction:column;
  z-index:50;overflow-y:auto;
}
.sidebar-brand{padding:var(--sp-8) var(--sp-6) var(--sp-6);border-bottom:1px solid var(--color-border);flex-shrink:0;}
.brand-name{font-family:var(--font-display);font-size:1.25rem;font-weight:700;letter-spacing:.2em;color:var(--color-text);line-height:1;}
.brand-sub{font-size:.57rem;letter-spacing:.22em;text-transform:uppercase;color:var(--color-text-muted);margin-top:5px;}
.sidebar-nav{padding:var(--sp-4) var(--sp-3);flex:1;display:flex;flex-direction:column;gap:2px;}
.sidebar-item{
  display:flex;align-items:center;gap:var(--sp-3);width:100%;
  padding:10px var(--sp-4);text-align:left;
  font-size:.72rem;font-weight:500;letter-spacing:.08em;text-transform:uppercase;
  color:var(--color-text-secondary);background:transparent;
  border:none;border-left:2px solid transparent;
  cursor:pointer;transition:all .18s;font-family:var(--font-primary);
}
.sidebar-item svg{flex-shrink:0;opacity:.55;transition:opacity .18s;}
.sidebar-item:hover{background:var(--color-surface-2);color:var(--color-text);border-left-color:var(--color-border-hover);}
.sidebar-item:hover svg{opacity:1;}
.sidebar-item.active{background:rgba(139,0,0,.1);color:#E0A0A0;border-left-color:var(--color-primary);}
.sidebar-item.active svg{opacity:1;}
.sidebar-footer{padding:var(--sp-3);border-top:1px solid var(--color-border);flex-shrink:0;}
.logout-btn{color:rgba(239,68,68,.42);}
.logout-btn:hover{background:rgba(239,68,68,.06);color:var(--color-error);border-left-color:rgba(239,68,68,.3);}

/* ── MAIN ─────────────────────────────────────────────────── */
.admin-main{
  flex:1;
  min-width:0;
  margin-left:var(--sidebar-w);
  position:relative;z-index:10;pointer-events:auto;
  display:flex;flex-direction:column;
  min-height:100vh;
}

/* ── TOPBAR ───────────────────────────────────────────────── */
.topbar{
  display:flex;align-items:center;justify-content:space-between;
  padding:var(--sp-5) var(--sp-8);
  border-bottom:1px solid var(--color-border);
  background:var(--color-surface);
  flex-shrink:0;gap:var(--sp-4);
  position:sticky;top:0;z-index:40;
}
.topbar-title{font-family:var(--font-display);font-size:1.35rem;font-weight:700;line-height:1;color:var(--color-text);}
.topbar-sub{font-size:.73rem;color:var(--color-text-secondary);margin-top:4px;}
.topbar-actions{flex-shrink:0;}
.user-badge{font-size:.63rem;font-weight:600;letter-spacing:.15em;text-transform:uppercase;background:rgba(139,0,0,.14);color:rgba(220,140,140,.9);padding:4px 10px;border:1px solid rgba(139,0,0,.22);}

/* ── VISTAS ───────────────────────────────────────────────── */
.view-content{
  padding:var(--sp-8);
  flex:1;
}

/* ════════════════════════════════════════════════════════════
   STATS
   ════════════════════════════════════════════════════════════ */
.stats-row{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--sp-4);margin-bottom:var(--sp-8);}
.stat-card{background:var(--color-surface);border:1px solid var(--color-border);padding:var(--sp-6);transition:border-color .2s;}
.stat-card:hover{border-color:rgba(139,0,0,.32);}
.stat-val{font-family:var(--font-display);font-size:2rem;font-weight:700;color:var(--color-text);line-height:1;}
.stat-label{font-size:.65rem;letter-spacing:.16em;text-transform:uppercase;color:var(--color-text-secondary);margin-top:var(--sp-2);}

/* ════════════════════════════════════════════════════════════
   TABLA
   ════════════════════════════════════════════════════════════ */
.table-wrap{background:var(--color-surface);border:1px solid var(--color-border);overflow-x:auto;}
.data-table{width:100%;border-collapse:collapse;min-width:580px;}
.data-table th{
  text-align:left;padding:var(--sp-4) var(--sp-5);
  font-size:.62rem;letter-spacing:.2em;text-transform:uppercase;font-weight:600;
  color:var(--color-text-secondary);border-bottom:1px solid var(--color-border);
  white-space:nowrap;background:var(--color-surface-2);
}
.data-table td{padding:var(--sp-4) var(--sp-5);border-bottom:1px solid var(--color-border);vertical-align:middle;font-size:.84rem;color:var(--color-text);}
.data-table tr:last-child td{border-bottom:none;}
.data-table tbody tr:hover td{background:rgba(255,255,255,.02);}
.table-loading{text-align:center;padding:var(--sp-12);color:var(--color-text-secondary);font-style:italic;}
.table-img{width:46px;height:46px;object-fit:cover;filter:grayscale(20%);border:1px solid var(--color-border);}
.table-title{font-weight:500;max-width:210px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;display:block;}
.actions-cell{display:flex;gap:var(--sp-2);align-items:center;}

.status-badge{display:inline-block;font-size:.62rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;padding:3px 8px;}
.status-available{background:rgba(16,185,129,.07);color:#34D399;border:1px solid rgba(16,185,129,.18);}
.status-sold{background:rgba(255,255,255,.03);color:rgba(255,255,255,.28);border:1px solid rgba(255,255,255,.06);}

/* ════════════════════════════════════════════════════════════
   FORMULARIO NUEVA PIEZA
   ════════════════════════════════════════════════════════════ */
.form-card{background:var(--color-surface);border:1px solid var(--color-border);padding:var(--sp-8) var(--sp-10);max-width:820px;}
.form-title{font-family:var(--font-display);font-size:1.35rem;font-weight:700;color:var(--color-text);margin-bottom:var(--sp-8);padding-bottom:var(--sp-5);border-bottom:1px solid var(--color-border);}
.field-grid{display:grid;grid-template-columns:1fr 1fr;gap:var(--sp-6);margin-bottom:var(--sp-8);}
.field-full{grid-column:1 / -1;}
.form-actions{display:flex;gap:var(--sp-3);flex-wrap:wrap;align-items:center;padding-top:var(--sp-6);border-top:1px solid var(--color-border);}
.form-error{margin-top:var(--sp-4);padding:var(--sp-3) var(--sp-4);background:rgba(239,68,68,.07);border:1px solid rgba(239,68,68,.2);color:var(--color-error);font-size:.8rem;}
.url-row{display:flex;gap:var(--sp-2);align-items:center;margin-bottom:var(--sp-2);}
.url-input{flex:1;}

/* ════════════════════════════════════════════════════════════
   UPLOAD ZONE
   ════════════════════════════════════════════════════════════ */
.upload-zone{border:1px dashed var(--color-border);background:var(--color-bg);transition:border-color .2s,background .2s;cursor:pointer;min-height:120px;}
.upload-zone:hover,.upload-zone.dragover{border-color:rgba(255,255,255,.25);background:rgba(255,255,255,.02);}
.file-input-hidden{display:none;}
.upload-prompt{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--sp-2);padding:var(--sp-8) var(--sp-6);text-align:center;color:var(--color-text-secondary);font-size:.85rem;}
.upload-prompt svg{opacity:.35;margin-bottom:var(--sp-1);}
.upload-prompt strong{color:var(--color-text);}
.upload-hint{font-size:.7rem;color:var(--color-text-muted);letter-spacing:.05em;}
.upload-previews{display:flex;flex-wrap:wrap;gap:var(--sp-2);padding:var(--sp-3);}
.upload-preview-item{position:relative;width:80px;height:80px;}
.upload-preview-item img{width:100%;height:100%;object-fit:cover;border:1px solid var(--color-border);filter:grayscale(15%);}
.upload-preview-remove{position:absolute;top:-6px;right:-6px;width:18px;height:18px;background:var(--color-error);color:white;border:none;border-radius:50%;font-size:10px;cursor:pointer;display:flex;align-items:center;justify-content:center;line-height:1;}
.upload-preview-uploading{position:absolute;inset:0;background:rgba(0,0,0,.6);display:flex;align-items:center;justify-content:center;}
.upload-preview-done::after{content:'✓';position:absolute;bottom:3px;right:3px;background:var(--color-success);color:white;font-size:9px;width:16px;height:16px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;}

/* ════════════════════════════════════════════════════════════
   MODAL EDICIÓN
   ════════════════════════════════════════════════════════════ */
.admin-modal{position:fixed;inset:0;z-index:200;display:flex;align-items:center;justify-content:center;padding:var(--sp-6);}
.admin-modal-backdrop{position:absolute;inset:0;background:rgba(0,0,0,.75);backdrop-filter:blur(4px);}
.admin-modal-inner{position:relative;z-index:1;background:var(--color-surface-2);border:1px solid var(--color-border);width:100%;max-width:460px;padding:var(--sp-8);box-shadow:0 30px 80px rgba(0,0,0,.6);display:flex;flex-direction:column;gap:var(--sp-5);}
.modal-title-sm{font-family:var(--font-display);font-size:1.2rem;font-weight:700;padding-bottom:var(--sp-4);border-bottom:1px solid var(--color-border);}
.modal-actions{display:flex;gap:var(--sp-3);justify-content:flex-end;padding-top:var(--sp-2);}

/* ════════════════════════════════════════════════════════════
   HELIX
   ════════════════════════════════════════════════════════════ */
.helix-powered{text-align:center;padding:var(--sp-4);border-top:1px solid var(--color-border);}
.helix-powered a{font-size:10px;color:rgba(255,255,255,.13);text-decoration:none;letter-spacing:.12em;text-transform:uppercase;font-weight:500;transition:color .2s;}
.helix-powered a:hover{color:rgba(255,255,255,.38);}

/* ════════════════════════════════════════════════════════════
   RESPONSIVE
   ════════════════════════════════════════════════════════════ */
@media (min-width:1024px){
  .stats-row{grid-template-columns:repeat(4,1fr);}
}
@media (max-width:768px){
  .sidebar{display:none;}
  .admin-main{margin-left:0;}
  .view-content{padding:var(--sp-4);}
  .topbar{padding:var(--sp-4);}
  .field-grid{grid-template-columns:1fr;}
  .form-card{padding:var(--sp-6) var(--sp-4);}
  .stats-row{grid-template-columns:repeat(2,1fr);}
}