/* ============ TOKENS ============ */
:root{
  --grid-gap:16px; --grid-margin:16px;
  --color-primary-50:#ecfdf5; --color-primary-100:#d1fae5; --color-primary-200:#a7f3d0;
  --color-primary-500:#10b981; --color-primary-600:#059669; --color-primary-700:#047857;
  --color-gray-50:#f9fafb; --color-gray-100:#f3f4f6; --color-gray-200:#e5e7eb; --color-gray-300:#d1d5db;
  --color-gray-400:#9ca3af; --color-gray-500:#6b7280; --color-gray-700:#374151; --color-gray-900:#111827;
  --color-success:#22c55e; --color-warning:#f59e0b; --color-danger:#ef4444; --color-info:#3b82f6;
  --color-energy:#f59e0b; --color-water:#3b82f6; --color-gas:#6b7280;
  --color-bg:#f9fafb; --color-surface:#ffffff; --color-surface-2:#f3f4f6;
  --color-text:#111827; --color-text-muted:#6b7280; --color-border:#e5e7eb;
  --font-sans:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,'Noto Sans',sans-serif;
  --text-xs:clamp(.64rem,.05vw + .63rem,.68rem); --text-sm:clamp(.80rem,.10vw + .78rem,.85rem);
  --text-base:clamp(1rem,.15vw + .97rem,1.13rem); --text-lg:clamp(1.25rem,.25vw + 1.20rem,1.41rem);
  --text-xl:clamp(1.56rem,.40vw + 1.48rem,1.76rem); --text-2xl:clamp(1.95rem,.60vw + 1.83rem,2.20rem);
  --space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:24px;--space-6:32px;--space-7:48px;
}
[data-theme="dark"]{
  --color-bg:#0f172a; --color-surface:#1e293b; --color-surface-2:#334155;
  --color-text:#f1f5f9; --color-text-muted:#94a3b8; --color-border:#334155;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --color-bg:#0f172a; --color-surface:#1e293b; --color-surface-2:#334155;
    --color-text:#f1f5f9; --color-text-muted:#94a3b8; --color-border:#334155;
  }
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;max-width:100%;overflow-x:hidden;}
body{
  font-family:var(--font-sans); font-size:var(--font-base,16px); color:var(--color-text);
  background:var(--color-bg); -webkit-font-smoothing:antialiased; padding-bottom:80px;
  transition:background .2s ease,color .2s ease;
}
h1,h2,h3{margin:0 0 var(--space-2) 0; line-height:1.2; letter-spacing:-0.02em;}
p{margin:0;line-height:1.6;}
button{font-family:inherit;}
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation-duration:.01ms !important;transition-duration:.01ms !important;}
}

/* ============ APP SHELL ============ */
.app-header{
  position:sticky; top:0; z-index:50; height:56px; display:flex; align-items:center;
  justify-content:space-between; padding:0 var(--space-4); background:var(--color-surface);
  border-bottom:1px solid var(--color-border); backdrop-filter:blur(8px);
}
.brand{display:flex;align-items:center;gap:var(--space-2);font-weight:700;font-size:var(--text-lg);}
.brand .leaf{width:28px;height:28px;border-radius:8px;background:var(--color-primary-500);
  display:flex;align-items:center;justify-content:center;color:#fff;font-size:16px;}
.header-actions{display:flex;gap:var(--space-2);}
.icon-btn{
  width:40px;height:40px;border-radius:10px;border:1px solid var(--color-border);
  background:var(--color-surface); color:var(--color-text); display:flex;align-items:center;
  justify-content:center;cursor:pointer;font-size:18px;
}
.icon-btn:hover{background:var(--color-surface-2);}

.container{max-width:1440px;margin:0 auto;padding:0 var(--grid-margin);}
@media (min-width:768px){:root{--grid-gap:24px;--grid-margin:24px;}}
@media (min-width:1024px){:root{--grid-margin:32px;}}

.layout{display:flex;}
.sidebar{
  display:none; position:sticky; top:56px; align-self:flex-start;
  width:240px; height:calc(100vh - 56px); background:var(--color-surface);
  border-right:1px solid var(--color-border); padding:var(--space-4) 0; overflow-y:auto;
}
@media (min-width:1024px){
  .sidebar{display:block;}
  .bottom-nav,.fab{display:none !important;}
  body{padding-bottom:0;}
  .main-content{padding:var(--space-6) var(--space-6);}
}
.sidebar__item{
  display:flex;align-items:center;gap:var(--space-3);padding:12px 20px;color:var(--color-text-muted);
  font-size:var(--text-sm);border-radius:0 8px 8px 0;margin-right:12px;cursor:pointer;background:none;border:none;width:calc(100% - 12px);text-align:left;
}
.sidebar__item:hover{background:var(--color-primary-50);color:var(--color-primary-700);}
.sidebar__item.active{background:var(--color-primary-100);color:var(--color-primary-700);font-weight:600;}

.main-content{flex:1;min-width:0;padding:var(--space-4);}
.view{display:none;animation:fade .2s ease;}
.view.active{display:block;}
@keyframes fade{from{opacity:0}to{opacity:1}}

/* ============ KPI CARDS ============ */
.kpi-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--space-4);margin-bottom:var(--space-5);}
@media (min-width:768px){.kpi-grid{grid-template-columns:repeat(4,minmax(0,1fr));}}
.month-nav{display:flex;align-items:center;justify-content:center;gap:var(--space-4);margin-bottom:var(--space-4);}
.month-nav strong{font-size:var(--text-base);min-width:110px;text-align:center;}
.month-nav .icon-btn{width:36px;height:36px;font-size:16px;}
.kpi-card{
  background:var(--color-surface);border:1px solid var(--color-border);border-radius:12px;
  padding:var(--space-4);display:flex;flex-direction:column;gap:var(--space-2);
  min-width:0;overflow-wrap:break-word;
  transition:transform .2s ease,box-shadow .2s ease;
}
.kpi-card:hover{transform:translateY(-2px);box-shadow:0 4px 12px rgba(0,0,0,.08);}
.kpi-card__icon{width:40px;height:40px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:18px;}
.kpi-card__icon--energy{background:rgba(245,158,11,.15);color:var(--color-energy);}
.kpi-card__icon--water{background:rgba(59,130,246,.15);color:var(--color-water);}
.kpi-card__icon--gas{background:rgba(107,114,128,.15);color:var(--color-gas);}
.kpi-card__icon--total{background:rgba(16,185,129,.15);color:var(--color-primary-500);}
.kpi-card__value{font-size:var(--text-2xl);font-weight:700;line-height:1.1;}
.kpi-card__label{font-size:var(--text-sm);color:var(--color-text-muted);}
.kpi-card__delta{font-size:var(--text-xs);font-weight:600;}
.kpi-card__delta--positive{color:var(--color-danger);}
.kpi-card__delta--negative{color:var(--color-success);}

.panel{background:var(--color-surface);border:1px solid var(--color-border);border-radius:12px;padding:var(--space-4);margin-bottom:var(--space-5);}
.panel h2{font-size:var(--text-lg);}
.panel-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:var(--space-3);}
.chart-wrap{position:relative;height:240px;}
@media (min-width:768px){.chart-wrap{height:280px;}}
@media (min-width:1024px){.chart-wrap{height:320px;}}

/* ============ LISTS ============ */
.reading-item{
  display:flex;align-items:center;justify-content:space-between;padding:var(--space-3) var(--space-2);
  border-bottom:1px solid var(--color-border);cursor:pointer;gap:var(--space-2);
}
.reading-item:last-child{border-bottom:none;}
.reading-item:hover{background:var(--color-surface-2);}
.reading-item__left{display:flex;align-items:center;gap:var(--space-3);min-width:0;overflow:hidden;}
.reading-item__left>div:last-child{min-width:0;overflow:hidden;text-overflow:ellipsis;}
.badge{width:36px;height:36px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:16px;flex-shrink:0;}
.badge--energia{background:rgba(245,158,11,.15);color:var(--color-energy);}
.badge--agua{background:rgba(59,130,246,.15);color:var(--color-water);}
.badge--gas{background:rgba(107,114,128,.15);color:var(--color-gas);}
.reading-item__meta{font-size:var(--text-xs);color:var(--color-text-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.reading-item__value{text-align:right;font-weight:600;font-size:var(--text-sm);flex-shrink:0;}

.filters{display:flex;gap:var(--space-2);flex-wrap:wrap;margin-bottom:var(--space-3);}
.chip{
  padding:6px 14px;border-radius:20px;border:1px solid var(--color-border);background:var(--color-surface);
  color:var(--color-text-muted);font-size:var(--text-sm);cursor:pointer;
}
.chip.active{background:var(--color-primary-500);color:#fff;border-color:var(--color-primary-500);}

.empty-state{text-align:center;padding:var(--space-7) var(--space-4);color:var(--color-text-muted);}
.empty-state__icon{font-size:40px;margin-bottom:var(--space-3);}

/* ============ FORMS ============ */
.field{margin-bottom:var(--space-4);}
.field label{display:block;font-size:var(--text-sm);font-weight:600;margin-bottom:var(--space-2);}
.input,.select{
  width:100%;height:48px;padding:0 16px;font-size:16px;color:var(--color-text);background:var(--color-surface);
  border:2px solid var(--color-gray-200);border-radius:10px;-webkit-appearance:none;appearance:none;
}
[data-theme="dark"] .input,[data-theme="dark"] .select{border-color:var(--color-border);}
.input:focus,.select:focus{outline:none;border-color:var(--color-primary-500);box-shadow:0 0 0 3px rgba(16,185,129,.15);}
textarea.input{height:auto;padding:12px 16px;min-height:72px;resize:vertical;}
.help-text{font-size:var(--text-xs);color:var(--color-text-muted);margin-top:var(--space-1);}
.error-text{font-size:var(--text-xs);color:var(--color-danger);margin-top:var(--space-1);display:none;}
.field.has-error .input{border-color:var(--color-danger);}
.field.has-error .error-text{display:block;}

.segment{display:flex;border:2px solid var(--color-gray-200);border-radius:10px;overflow:hidden;}
[data-theme="dark"] .segment{border-color:var(--color-border);}
.segment button{flex:1;padding:12px 8px;border:none;background:var(--color-surface);color:var(--color-text-muted);cursor:pointer;font-weight:600;font-size:var(--text-sm);}
.segment button.active{background:var(--color-primary-500);color:#fff;}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 24px;
  font-size:var(--text-base);font-weight:600;border-radius:10px;border:none;cursor:pointer;transition:all .15s ease;min-width:48px;
}
.btn:active{transform:scale(.97);}
.btn--primary{background:var(--color-primary-500);color:#fff;}
.btn--primary:hover{background:var(--color-primary-600);}
.btn--secondary{background:var(--color-gray-100);color:var(--color-gray-700);}
[data-theme="dark"] .btn--secondary{background:var(--color-surface-2);color:var(--color-text);}
.btn--danger{background:rgba(239,68,68,.12);color:var(--color-danger);}
.btn--block{width:100%;}
.btn-row{display:flex;gap:var(--space-3);}

/* ============ FAB ============ */
.fab{
  position:fixed;bottom:calc(64px + 16px + env(safe-area-inset-bottom));right:16px;width:56px;height:56px;
  border-radius:50%;background:var(--color-primary-500);color:#fff;border:none;display:flex;align-items:center;
  justify-content:center;box-shadow:0 4px 12px rgba(16,185,129,.4);z-index:40;font-size:26px;cursor:pointer;
}

/* ============ BOTTOM NAV ============ */
.bottom-nav{
  position:fixed;bottom:0;left:0;right:0;height:64px;background:var(--color-surface);
  border-top:1px solid var(--color-border);display:flex;justify-content:space-around;align-items:center;
  padding-bottom:env(safe-area-inset-bottom);z-index:50;
}
.bottom-nav__item{
  display:flex;flex-direction:column;align-items:center;gap:4px;min-width:64px;min-height:48px;
  justify-content:center;color:var(--color-text-muted);font-size:var(--text-xs);background:none;border:none;cursor:pointer;
}
.bottom-nav__item.active{color:var(--color-primary-500);}
.bottom-nav__icon{font-size:20px;}

/* ============ MODAL / BOTTOM SHEET ============ */
.overlay{
  position:fixed;inset:0;background:rgba(0,0,0,.5);backdrop-filter:blur(4px);display:none;
  align-items:center;justify-content:center;z-index:100;
}
.overlay.open{display:flex;}
.sheet{
  background:var(--color-surface);border-radius:20px;max-height:90vh;width:calc(100% - 32px);max-width:480px;
  overflow-y:auto;padding:var(--space-5) var(--space-4) calc(var(--space-5) + env(safe-area-inset-bottom));
  transform:translateY(20px);transition:transform .2s ease;box-shadow:0 20px 40px rgba(0,0,0,.15);
}
@media (min-width:768px){
  .sheet{border-radius:16px;max-width:480px;max-height:85vh;box-shadow:0 20px 40px rgba(0,0,0,.15);}
}
.sheet__handle{display:none;}
.sheet__title{display:flex;align-items:center;justify-content:space-between;margin-bottom:var(--space-4);}

/* ============ TOAST ============ */
.toast-wrap{position:fixed;bottom:calc(80px + env(safe-area-inset-bottom));left:0;right:0;display:flex;justify-content:center;z-index:200;pointer-events:none;}
.toast{
  background:var(--color-gray-900);color:#fff;padding:12px 20px;border-radius:10px;font-size:var(--text-sm);
  box-shadow:0 4px 12px rgba(0,0,0,.2);opacity:0;transform:translateY(10px);transition:all .3s ease;max-width:90vw;
}
.toast.show{opacity:1;transform:translateY(0);}

/* ============ LGPD BANNER ============ */
.lgpd-banner{
  background:var(--color-primary-50);border-bottom:1px solid var(--color-primary-200);color:var(--color-primary-700);
  padding:var(--space-3) var(--space-4);font-size:var(--text-sm);display:flex;align-items:center;gap:var(--space-3);flex-wrap:wrap;
}
[data-theme="dark"] .lgpd-banner{background:rgba(16,185,129,.1);color:#6ee7b7;border-color:rgba(16,185,129,.3);}
.lgpd-banner button{margin-left:auto;}

/* ============ MISC ============ */
.grid-2{display:grid;grid-template-columns:minmax(0,1fr);gap:var(--space-4);}
@media (min-width:768px){.grid-2{grid-template-columns:minmax(0,1fr) minmax(0,1fr);}}
.stat-row{display:flex;justify-content:space-between;padding:8px 0;border-bottom:1px solid var(--color-border);font-size:var(--text-sm);}
.stat-row:last-child{border-bottom:none;}
.section-title{font-size:var(--text-xs);text-transform:uppercase;letter-spacing:.05em;color:var(--color-text-muted);font-weight:700;margin:var(--space-5) 0 var(--space-2);}
.share-list{display:flex;flex-direction:column;gap:var(--space-3);}
.share-card{display:flex;align-items:center;gap:var(--space-3);padding:var(--space-4);border:1px solid var(--color-border);border-radius:12px;background:var(--color-surface);cursor:pointer;}
.share-card:hover{background:var(--color-surface-2);}
.share-card__icon{width:40px;height:40px;border-radius:10px;background:var(--color-primary-50);color:var(--color-primary-600);display:flex;align-items:center;justify-content:center;font-size:18px;}
[data-theme="dark"] .share-card__icon{background:rgba(16,185,129,.15);}
#qrBox{display:flex;justify-content:center;padding:var(--space-4) 0;}
.footer-note{text-align:center;color:var(--color-text-muted);font-size:var(--text-xs);padding:var(--space-6) var(--space-4);}
.link-btn{background:none;border:none;color:var(--color-primary-600);cursor:pointer;font-size:var(--text-sm);padding:0;text-decoration:underline;}