:root{
  --bg:#F2F0EB;--surface:#fff;--s2:#ECEAE4;--s3:#E3E0D9;
  --acc:#FF4D00;--accs:#FFF1EB;
  --tx:#1C1B18;--tx2:#6A6860;--tx3:#AEACA5;
  --brd:#E0DDD6;
  --ok:#1A7A4A;--ok-bg:#E8F5EE;
  --err:#C0392B;--err-bg:#FDECEB;
  --warn:#B45309;--warn-bg:#FEF3C7;
  --r:14px;--rsm:8px;--rlg:20px;
  --mono:'DM Mono',monospace;
}
*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}
body{background:var(--bg);color:var(--tx);font-family:'Syne',sans-serif;font-size:14px;line-height:1.5;min-height:100vh}

/* ===== AUTH ===== */
#authScreen{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100vh;padding:24px;background:var(--bg)}
.auth-logo{font-size:38px;font-weight:800;letter-spacing:-2px;margin-bottom:4px}
.auth-logo em{color:var(--acc);font-style:normal}
.auth-sub{font-size:13px;color:var(--tx2);margin-bottom:32px}
.auth-card{background:var(--surface);border:1.5px solid var(--brd);border-radius:var(--rlg);padding:24px;width:100%;max-width:400px}
.auth-title{font-size:18px;font-weight:800;letter-spacing:-.4px;margin-bottom:20px}

/* ===== APP SHELL ===== */
#appShell{display:none;flex-direction:column;min-height:100vh}
.app-header{background:var(--surface);border-bottom:1.5px solid var(--brd);position:sticky;top:0;z-index:200}
.app-header-inner{max-width:700px;margin:0 auto;padding:0 16px;display:flex;align-items:center;justify-content:space-between;height:54px}
.logo{display:flex;align-items:center;gap:10px}
.logo-mark{width:30px;height:30px;background:var(--acc);border-radius:7px;display:flex;align-items:center;justify-content:center;font-size:14px;color:#fff;font-weight:800}
.logo-name{font-size:17px;font-weight:800;letter-spacing:-.5px}
.logo-name em{color:var(--acc);font-style:normal}
.hdr-actions{display:flex;align-items:center;gap:8px}
.btn-logout{background:var(--s2);border:none;border-radius:20px;font-family:'Syne',sans-serif;font-size:11px;font-weight:700;color:var(--tx2);padding:5px 12px;cursor:pointer}

/* ===== BOTTOM NAV ===== */
.bottom-nav{position:fixed;bottom:0;left:0;right:0;background:var(--surface);border-top:1.5px solid var(--brd);display:flex;z-index:200}
.nav-btn{flex:1;border:none;background:transparent;padding:10px 4px 8px;display:flex;flex-direction:column;align-items:center;gap:3px;cursor:pointer;color:var(--tx3);font-family:'Syne',sans-serif;transition:color .15s}
.nav-btn.active{color:var(--acc)}
.nav-icon{font-size:19px;line-height:1}
.nav-label{font-size:9px;font-weight:700;letter-spacing:.5px;text-transform:uppercase}

/* ===== FAB ===== */
.btn-fab{position:fixed;bottom:80px;right:16px;width:52px;height:52px;background:var(--acc);color:#fff;border:none;border-radius:50%;font-size:26px;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 20px rgba(255,77,0,.4);z-index:150}

/* ===== MAIN / VIEWS ===== */
.main{max-width:700px;margin:0 auto;padding:16px 14px 96px;width:100%}
.view{display:none}
.view.active{display:block}
.page-title{font-size:22px;font-weight:800;letter-spacing:-.6px;margin-bottom:4px}
.page-sub{font-size:13px;color:var(--tx2);margin-bottom:16px}

/* ===== CARDS ===== */
.card{background:var(--surface);border:1.5px solid var(--brd);border-radius:var(--r);overflow:hidden;margin-bottom:10px}
.card-hdr{padding:12px 14px;border-bottom:1px solid var(--brd);display:flex;align-items:center;justify-content:space-between}
.card-title{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.5px;color:var(--tx3)}

/* ===== BUTTONS ===== */
.btn-primary{width:100%;background:var(--acc);color:#fff;border:none;border-radius:var(--r);font-family:'Syne',sans-serif;font-size:15px;font-weight:700;padding:15px;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:8px;margin-top:8px}
.btn-secondary{width:100%;background:var(--surface);border:1.5px solid var(--brd);border-radius:var(--r);font-family:'Syne',sans-serif;font-size:14px;font-weight:600;color:var(--tx2);padding:13px;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:8px;margin-top:8px}
.btn-danger{width:100%;background:transparent;border:1.5px solid var(--brd);border-radius:var(--r);font-family:'Syne',sans-serif;font-size:13px;font-weight:600;color:var(--err);padding:12px;cursor:pointer;margin-top:6px;display:flex;align-items:center;justify-content:center;gap:6px}
.btn-export{width:100%;background:var(--surface);border:1.5px solid var(--brd);border-radius:var(--r);font-family:'Syne',sans-serif;font-size:14px;font-weight:600;color:var(--tx);padding:13px;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:8px;margin-bottom:10px}
.btn-icon{background:none;border:none;font-size:15px;cursor:pointer;color:var(--tx3);padding:4px 6px;line-height:1}

/* ===== FORMS ===== */
.form-group{margin-bottom:14px}
.form-label{display:block;font-size:11px;font-weight:700;color:var(--tx2);letter-spacing:.5px;text-transform:uppercase;margin-bottom:6px}
.form-input,.form-select{width:100%;background:var(--bg);border:1.5px solid var(--brd);border-radius:var(--rsm);color:var(--tx);font-family:'Syne',sans-serif;font-size:15px;font-weight:500;padding:12px 14px;outline:none;-webkit-appearance:none;appearance:none}
.form-input:focus,.form-select:focus{border-color:var(--acc)}
.form-select{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236A6860' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;padding-right:38px;cursor:pointer}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.form-check{display:flex;align-items:center;gap:8px;padding:10px 0}
.form-check input[type=checkbox]{width:18px;height:18px;cursor:pointer;accent-color:var(--acc)}

/* ===== MODAL ===== */
.modal-overlay{position:fixed;inset:0;z-index:600;background:rgba(28,27,24,.5);display:none;align-items:flex-end;justify-content:center}
.modal-overlay.open{display:flex}
.modal-sheet{background:var(--surface);border-radius:var(--rlg) var(--rlg) 0 0;width:100%;max-width:700px;padding:20px 20px 40px;max-height:90vh;overflow-y:auto}
.modal-handle{width:36px;height:4px;background:var(--brd);border-radius:2px;margin:0 auto 18px}
.modal-title{font-size:18px;font-weight:800;letter-spacing:-.4px;margin-bottom:18px}

/* ===== TOAST ===== */
#toast{position:fixed;bottom:88px;left:50%;transform:translateX(-50%) translateY(12px);background:var(--tx);color:#fff;font-size:13px;font-weight:600;padding:10px 18px;border-radius:20px;opacity:0;transition:all .25s;z-index:700;pointer-events:none;white-space:nowrap}
#toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ===== EMPTY STATE ===== */
.empty-state{text-align:center;padding:50px 24px;color:var(--tx2)}
.empty-icon{font-size:40px;margin-bottom:10px;opacity:.4}
.empty-text{font-size:14px;font-weight:600;opacity:.6;line-height:1.6}

/* ===== OBRAS ===== */
.obra-card{background:var(--surface);border:1.5px solid var(--brd);border-radius:var(--r);padding:16px;cursor:pointer;margin-bottom:10px;transition:border-color .15s}
.obra-card-active{border-left:4px solid var(--acc)}
.obra-card-top{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:12px}
.obra-card-info{}
.obra-card-name{font-size:16px;font-weight:700;letter-spacing:-.3px}
.obra-card-cliente{font-size:12px;color:var(--tx2);margin-top:2px}
.obra-card-actions{display:flex;flex-direction:column;align-items:flex-end;gap:6px}
.obra-status{font-size:10px;font-weight:700;letter-spacing:.5px;padding:4px 9px;border-radius:20px;text-transform:uppercase;cursor:pointer;white-space:nowrap}
.s-activa{background:var(--ok-bg);color:var(--ok)}
.s-presupuesto{background:var(--warn-bg);color:var(--warn)}
.s-cerrada{background:var(--s2);color:var(--tx3)}
.obra-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-bottom:10px}
.obra-stat{background:var(--bg);border-radius:var(--rsm);padding:8px 10px}
.obra-stat-val{font-size:14px;font-weight:700;font-family:var(--mono);letter-spacing:-.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.obra-stat-val.ok{color:var(--ok)}
.obra-stat-val.warn{color:var(--err)}
.obra-stat-lbl{font-size:10px;color:var(--tx3);font-weight:600;text-transform:uppercase;letter-spacing:.4px}
.avance-bar{background:var(--s2);border-radius:20px;height:5px;overflow:hidden;flex:1}
.avance-fill{background:var(--acc);height:100%;border-radius:20px;transition:width .4s}
.obra-avance{display:flex;align-items:center;gap:10px}
.avance-label{font-size:11px;color:var(--tx3);font-weight:600;white-space:nowrap}

/* ===== PRESUPUESTO BANNER ===== */
#presBanner{background:var(--tx);border-radius:var(--r);padding:14px 16px;margin-bottom:14px}
.banner-obra-name{font-size:12px;font-weight:700;color:rgba(255,255,255,.5);text-transform:uppercase;letter-spacing:.5px;margin-bottom:10px}
.banner-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-bottom:10px}
.banner-cell{text-align:center}
.banner-lbl{font-size:9px;font-weight:700;color:rgba(255,255,255,.4);letter-spacing:.8px;text-transform:uppercase}
.banner-val{font-size:15px;font-weight:700;color:#fff;font-family:var(--mono);letter-spacing:-.5px;margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.banner-val.ok{color:#4ADE80}
.banner-val.warn{color:#FF6B57}
.banner-avance{display:flex;align-items:center;gap:10px}
.banner-av-label{font-size:11px;color:rgba(255,255,255,.5);white-space:nowrap}
.banner-av-val{font-size:11px;font-weight:700;color:#fff;white-space:nowrap}

/* ===== CERT BANNER ===== */
#certBanner{background:var(--tx);border-radius:var(--r);padding:14px 16px;margin-bottom:14px}

/* ===== RUBROS ===== */
.rubro-block{background:var(--surface);border:1.5px solid var(--brd);border-radius:var(--r);margin-bottom:10px;overflow:hidden}
.rubro-hdr{padding:13px 14px;display:flex;align-items:center;gap:10px;cursor:pointer;user-select:none}
.rubro-dot{width:8px;height:8px;border-radius:50%;flex-shrink:0}
.rubro-name{font-size:14px;font-weight:700;flex:1;letter-spacing:-.2px}
.rubro-meta{display:flex;align-items:center;gap:8px;margin-right:6px}
.rubro-total{font-family:var(--mono);font-size:13px;font-weight:500;color:var(--tx2)}
.rubro-pct{font-size:11px;font-weight:700;color:var(--acc);background:var(--accs);padding:2px 7px;border-radius:20px}
.rubro-edit{opacity:.5}
.rubro-body{display:none;border-top:1px solid var(--brd)}
.rubro-body.open{display:block}

/* ===== ITEMS ===== */
.item-row{padding:11px 14px;border-bottom:1px solid var(--brd);display:grid;grid-template-columns:1fr auto;gap:8px;align-items:center;cursor:pointer}
.item-row:last-of-type{border-bottom:none}
.item-info{}
.item-name{font-size:13px;font-weight:600;line-height:1.3}
.item-detail{font-size:11px;color:var(--tx3);margin-top:2px;font-family:var(--mono)}
.item-right{text-align:right}
.item-total{font-size:14px;font-weight:700;font-family:var(--mono)}
.item-chips{display:flex;gap:4px;justify-content:flex-end;margin-top:3px}
.chip{font-size:10px;font-weight:700;padding:2px 6px;border-radius:20px;letter-spacing:.3px}
.chip-av{background:var(--warn-bg);color:var(--warn)}
.chip-pag{background:var(--ok-bg);color:var(--ok)}
.btn-add-item{width:100%;background:none;border:none;border-top:1px dashed var(--brd);padding:10px 14px;text-align:left;color:var(--acc);font-family:'Syne',sans-serif;font-size:13px;font-weight:700;cursor:pointer}

/* ===== CERTIFICACIONES ===== */
.cert-item{border-bottom:1px solid var(--brd)}
.cert-item:last-child{border-bottom:none}
.cert-item-hdr{padding:12px 14px;display:flex;justify-content:space-between;align-items:center;cursor:pointer;user-select:none}
.cert-item-name{font-size:13px;font-weight:700}
.cert-item-meta{display:flex;gap:6px}
.cert-item-body{display:none;padding:0 14px 14px}
.cert-item-body.open{display:block}
.cert-kpis{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-bottom:10px}
.cert-kpi{background:var(--bg);border-radius:var(--rsm);padding:8px 10px;text-align:center}
.cert-kpi-val{font-size:14px;font-weight:700;font-family:var(--mono)}
.cert-kpi-val.ok{color:var(--ok)}
.cert-kpi-val.warn{color:var(--err)}
.cert-kpi-lbl{font-size:10px;color:var(--tx3);font-weight:600;text-transform:uppercase;letter-spacing:.4px}
.cert-hist{margin-top:10px;border:1.5px solid var(--brd);border-radius:var(--rsm);overflow:hidden}
.cert-row{display:flex;justify-content:space-between;align-items:center;padding:9px 12px;border-bottom:1px solid var(--brd)}
.cert-row:last-child{border-bottom:none}
.cert-row-left{display:flex;align-items:center;gap:8px;flex:1;min-width:0}
.cert-row-right{display:flex;align-items:center;gap:8px}
.cert-badge{font-size:10px;font-weight:700;padding:2px 7px;border-radius:20px;text-transform:uppercase;white-space:nowrap}
.cert-badge-av{background:var(--warn-bg);color:var(--warn)}
.cert-badge-pag{background:var(--ok-bg);color:var(--ok)}
.cert-fecha{font-size:11px;color:var(--tx3);font-family:var(--mono)}
.cert-desc{font-size:11px;color:var(--tx2);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:100px}
.cert-valor{font-size:13px;font-weight:700;font-family:var(--mono);white-space:nowrap}
.cert-valor.ok{color:var(--ok)}
.btn-del-cert{background:none;border:none;color:var(--tx3);cursor:pointer;font-size:13px;padding:2px 4px;line-height:1}
.btn-del-cert:hover{color:var(--err)}
.btn-add-cert{width:100%;background:none;border:none;border-top:1px dashed var(--brd);padding:10px 0;text-align:left;color:var(--acc);font-family:'Syne',sans-serif;font-size:13px;font-weight:700;cursor:pointer;margin-top:10px}

/* ===== CALCULADORA ===== */
.calc-intro{margin-bottom:16px}
.calc-nota{font-size:13px;color:var(--tx2);line-height:1.5}
.calc-rubro-section{margin-bottom:20px}
.calc-rubro-title{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.5px;color:var(--tx3);margin-bottom:8px}
.calc-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.calc-card{background:var(--surface);border:1.5px solid var(--brd);border-radius:var(--r);padding:14px;cursor:pointer;transition:border-color .15s}
.calc-card:hover{border-color:var(--acc)}
.calc-card-name{font-size:13px;font-weight:700;color:var(--tx);line-height:1.3;margin-bottom:4px}
.calc-card-unidad{font-size:11px;color:var(--tx3);font-weight:600}
.calc-result-header{background:var(--accs);border:1.5px solid var(--acc);border-radius:var(--rsm);padding:12px 14px;margin-bottom:12px}
.calc-result-variante{font-size:14px;font-weight:700;color:var(--acc)}
.calc-result-cant{font-size:12px;color:var(--tx2);margin-top:2px}
.calc-table{width:100%;border-collapse:collapse;margin-bottom:10px}
.calc-table th{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.5px;color:var(--tx3);padding:6px 8px;text-align:left;border-bottom:1.5px solid var(--brd)}
.calc-table td{padding:8px 8px;border-bottom:1px solid var(--brd);font-size:13px}
.calc-table tr:last-child td{border-bottom:none}
.calc-table .num{text-align:right;font-family:var(--mono)}
.calc-table .total-col{font-weight:700;color:var(--acc)}
.calc-aviso{font-size:11px;color:var(--tx3);font-style:italic}
.btn-rubro-dest{width:100%;background:var(--bg);border:1.5px solid var(--brd);border-radius:var(--r);padding:12px 14px;text-align:left;cursor:pointer;font-family:'Syne',sans-serif;display:flex;justify-content:space-between;align-items:center}
.btn-rubro-nombre{font-size:14px;font-weight:700;color:var(--tx)}
.btn-rubro-total{font-size:12px;color:var(--tx2);font-family:var(--mono)}

/* ===== ADMIN ===== */
.admin-tabs{display:flex;gap:4px;margin-bottom:16px;background:var(--s2);padding:4px;border-radius:10px;overflow-x:auto}
.admin-tab{flex:1;min-width:80px;background:transparent;border:none;font-family:'Syne',sans-serif;font-size:11px;font-weight:700;color:var(--tx2);padding:8px 4px;border-radius:7px;cursor:pointer;white-space:nowrap;text-align:center}
.admin-tab.active{background:var(--surface);color:var(--tx);box-shadow:0 1px 4px rgba(0,0,0,.08)}
.admin-section{background:var(--surface);border:1.5px solid var(--brd);border-radius:var(--r);overflow:hidden}
.admin-section-hdr{padding:12px 14px;border-bottom:1px solid var(--brd);display:flex;align-items:center;justify-content:space-between}
.admin-section-title{font-size:13px;font-weight:700}
.btn-admin-new{background:var(--acc);color:#fff;border:none;border-radius:20px;font-family:'Syne',sans-serif;font-size:12px;font-weight:700;padding:6px 14px;cursor:pointer}
.admin-row{padding:12px 14px;border-bottom:1px solid var(--brd);display:flex;align-items:center;justify-content:space-between;gap:10px}
.admin-row:last-child{border-bottom:none}
.admin-row-info{flex:1;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.admin-row-name{font-size:13px;font-weight:700;color:var(--tx)}
.admin-row-meta{font-size:11px;color:var(--tx3)}
.admin-row-actions{display:flex;align-items:center;gap:6px}
.btn-admin-action{background:var(--s2);border:none;border-radius:20px;font-family:'Syne',sans-serif;font-size:11px;font-weight:700;color:var(--tx2);padding:5px 10px;cursor:pointer;white-space:nowrap}
.btn-admin-del{background:none;border:none;color:var(--tx3);cursor:pointer;font-size:14px;padding:4px}
.btn-admin-del:hover{color:var(--err)}
.badge-estado{font-size:9px;font-weight:700;padding:2px 7px;border-radius:20px;letter-spacing:.5px;text-transform:uppercase}
.badge-ok{background:var(--ok-bg);color:var(--ok)}
.badge-off{background:var(--s2);color:var(--tx3)}
.admin-filtro{padding:10px 14px;border-bottom:1px solid var(--brd)}