/* =====================================================
   ZONIC INVOICE MANAGER - Professional UI Design
   Clean, modern billing application stylesheet
   ===================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

/* == CSS Custom Properties == */
:root {
  --brand:         #4f46e5;
  --brand-hover:   #4338ca;
  --brand-light:   #6366f1;
  --brand-bg:      rgba(79,70,229,0.08);
  --brand-border:  rgba(79,70,229,0.2);

  --success:       #16a34a;
  --success-light: #22c55e;
  --success-bg:    rgba(22,163,74,0.08);
  --warning:       #d97706;
  --warning-bg:    rgba(217,119,6,0.08);
  --danger:        #dc2626;
  --danger-bg:     rgba(220,38,38,0.08);

  --bg:            #f8fafc;
  --bg-card:       #ffffff;
  --bg-input:      #f1f5f9;
  --bg-hover:      #f1f5f9;
  --border:        #e2e8f0;

  --text:          #0f172a;
  --text-2:        #475569;
  --text-3:        #94a3b8;

  --nav-h:         64px;
  --topbar-h:      56px;
  --sidebar-w:     240px;
  --radius-xs:     6px;
  --radius-sm:     10px;
  --radius:        14px;
  --radius-lg:     18px;
  --radius-xl:     24px;

  --shadow-xs:  0 1px 2px rgba(0,0,0,0.05);
  --shadow-sm:  0 1px 4px rgba(0,0,0,0.06),0 2px 8px rgba(0,0,0,0.04);
  --shadow:     0 4px 12px rgba(0,0,0,0.08),0 1px 3px rgba(0,0,0,0.05);
  --shadow-md:  0 8px 24px rgba(0,0,0,0.10),0 2px 6px rgba(0,0,0,0.06);
  --shadow-lg:  0 16px 48px rgba(0,0,0,0.12),0 4px 12px rgba(0,0,0,0.06);
  --shadow-nav: 0 -1px 0 rgba(0,0,0,0.06),0 -4px 16px rgba(0,0,0,0.04);
  --shadow-brand: 0 4px 20px rgba(79,70,229,0.35);

  --tr:   180ms cubic-bezier(0.4,0,0.2,1);
  --tr-s: 120ms cubic-bezier(0.4,0,0.2,1);

  /* Legacy compat */
  --bg-primary:    var(--bg);
  --bg-secondary:  var(--bg-card);
  --text-primary:  var(--text);
  --text-secondary:var(--text-2);
  --text-muted:    var(--text-3);
  --accent:        var(--brand);
  --accent-light:  var(--brand-light);
  --accent-bg:     var(--brand-bg);
}

[data-theme="dark"] {
  --bg:            #0d1117;
  --bg-card:       #161b22;
  --bg-input:      #0d1117;
  --bg-hover:      #1c2128;
  --border:        #30363d;

  --text:          #e6edf3;
  --text-2:        #8b949e;
  --text-3:        #6e7681;

  --brand:         #6366f1;
  --brand-hover:   #818cf8;
  --brand-bg:      rgba(99,102,241,0.12);
  --brand-border:  rgba(99,102,241,0.25);

  --success:       #22c55e;
  --success-light: #4ade80;
  --success-bg:    rgba(34,197,94,0.12);
  --warning:       #f59e0b;
  --warning-bg:    rgba(245,158,11,0.12);
  --danger:        #f43f5e;
  --danger-bg:     rgba(244,63,94,0.12);

  --shadow-xs:  0 1px 2px rgba(0,0,0,0.3);
  --shadow-sm:  0 1px 4px rgba(0,0,0,0.4),0 2px 8px rgba(0,0,0,0.2);
  --shadow:     0 4px 12px rgba(0,0,0,0.5),0 1px 3px rgba(0,0,0,0.3);
  --shadow-md:  0 8px 24px rgba(0,0,0,0.6),0 2px 6px rgba(0,0,0,0.3);
  --shadow-lg:  0 16px 48px rgba(0,0,0,0.7),0 4px 12px rgba(0,0,0,0.4);
  --shadow-nav: 0 -1px 0 rgba(255,255,255,0.04);
  --shadow-brand: 0 4px 20px rgba(99,102,241,0.4);

  /* Legacy compat */
  --bg-primary:    var(--bg);
  --bg-secondary:  var(--bg-card);
  --text-primary:  var(--text);
  --text-secondary:var(--text-2);
  --text-muted:    var(--text-3);
  --accent:        var(--brand);
  --accent-light:  var(--brand-light);
  --accent-bg:     var(--brand-bg);
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: 'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100dvh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  transition: background var(--tr),color var(--tr);
}

a{color:var(--brand);text-decoration:none}
img{max-width:100%}
input,select,textarea,button{font-family:inherit}

/* SVG icon base */
.nav-icon svg,.sidebar-nav-icon svg,.topbar-back svg,.quick-action-icon svg,
.settings-icon svg,.empty-icon svg,.search-icon svg,.password-toggle svg,
.login-logo svg,.sidebar-logo svg,.sidebar-logout-btn svg,.login-hint svg {
  stroke: currentColor;fill: none;
  stroke-width: 1.75;stroke-linecap: round;stroke-linejoin: round;
  display:block;
}

/* == Layout == */
#app {
  max-width: 540px;
  margin: 0 auto;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  position: relative;
}

.page-content {
  flex: 1;
  padding-top: var(--topbar-h);
  padding-bottom: calc(var(--nav-h) + 16px);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

/* == Topbar == */
.topbar {
  position: fixed;
  top:0;left:50%;
  transform:translateX(-50%);
  width:100%;max-width:540px;
  height:var(--topbar-h);
  background:var(--bg-card);
  border-bottom:1px solid var(--border);
  display:flex;align-items:center;
  padding:0 0.875rem;
  z-index:100;gap:0.5rem;
  transition:background var(--tr);
}

.topbar-back {
  background:none;border:none;color:var(--brand);
  cursor:pointer;padding:0;
  border-radius:var(--radius-sm);
  transition:background var(--tr);
  width:36px;height:36px;
  display:flex;align-items:center;justify-content:center;
  flex-shrink:0;
}
.topbar-back:hover{background:var(--brand-bg)}
.topbar-back svg{width:20px;height:20px}

.topbar-title {
  flex:1;
  font-size:0.9375rem;font-weight:700;
  color:var(--text);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
  letter-spacing:-0.01em;
}

.topbar-action {
  background:none;border:none;color:var(--text-2);
  cursor:pointer;padding:0;border-radius:50%;
  width:36px;height:36px;
  display:flex;align-items:center;justify-content:center;
  transition:background var(--tr),color var(--tr);
}
.topbar-action svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.topbar-action:hover{background:var(--bg-hover);color:var(--danger)}

/* == Bottom Nav == */
.bottom-nav {
  position:fixed;bottom:0;left:50%;
  transform:translateX(-50%);
  width:100%;max-width:540px;height:var(--nav-h);
  background:var(--bg-card);border-top:1px solid var(--border);
  display:flex;align-items:stretch;z-index:100;
  box-shadow:var(--shadow-nav);
}

.nav-item {
  flex:1;display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:4px;
  cursor:pointer;border:none;background:none;
  color:var(--text-3);
  transition:color var(--tr-s);
  position:relative;padding:8px 2px;
}
.nav-item.active{color:var(--brand)}
.nav-item.active::before{display:none}
.nav-icon{display:flex;align-items:center;justify-content:center;width:44px;height:28px;border-radius:10px;transition:background var(--tr-s)}
.nav-icon svg{width:22px;height:22px}
.nav-item.active .nav-icon{background:var(--brand-bg)}
.nav-label{font-size:0.625rem;font-weight:600;letter-spacing:0.01em}

/* == Cards == */
.card {
  background:var(--bg-card);border-radius:var(--radius);
  box-shadow:var(--shadow-xs);padding:1rem;
  border:1px solid var(--border);
  transition:background var(--tr),box-shadow var(--tr),transform var(--tr);
}

.section{padding:0 1rem 1rem}
.section-title {
  font-size:0.7rem;font-weight:700;color:var(--text-3);
  text-transform:uppercase;letter-spacing:0.08em;
  margin-bottom:0.625rem;padding:1rem 1rem 0;
  display:flex;align-items:center;gap:0.4rem;
}
.section-title::before{content:'';display:inline-block;width:3px;height:11px;background:var(--brand);border-radius:2px;flex-shrink:0;opacity:0.7}

/* == Stats Grid == */
.stats-grid{display:grid;grid-template-columns:1fr 1fr;gap:0.75rem;padding:1rem}
.stat-card{background:var(--bg-card);border-radius:var(--radius);padding:1rem;border:1px solid var(--border);box-shadow:var(--shadow-xs)}
.stat-card.full{grid-column:1/-1}
.stat-card.accent-bg{background:var(--brand);border-color:var(--brand)}
.stat-card.accent-bg .stat-value,.stat-card.accent-bg .stat-label{color:white}
.stat-icon{font-size:1.4rem;margin-bottom:0.5rem}
.stat-value{font-size:1.35rem;font-weight:800;color:var(--text);line-height:1.2;letter-spacing:-0.02em}
.stat-label{font-size:0.72rem;color:var(--text-2);margin-top:2px;font-weight:500}

/* == List Items == */
.list{padding:0 1rem;display:flex;flex-direction:column;gap:0.5rem}

.list-item {
  background:var(--bg-card);border-radius:var(--radius-sm);
  border:1px solid var(--border);
  padding:0.8rem 0.875rem;
  display:flex;align-items:center;gap:0.75rem;
  cursor:pointer;
  transition:background var(--tr-s),box-shadow var(--tr-s),border-color var(--tr-s);
  position:relative;overflow:hidden;
}
.list-item:active{transform:scale(0.99);background:var(--bg-hover)}

.list-item-avatar {
  width:42px;height:42px;border-radius:12px;
  background:linear-gradient(135deg,var(--brand-bg),rgba(124,58,237,0.07));
  display:flex;align-items:center;justify-content:center;
  font-size:0.78rem;font-weight:800;color:var(--brand);
  flex-shrink:0;text-transform:uppercase;letter-spacing:0.02em;
  border:1px solid var(--brand-border);
}

.list-item-body{flex:1;min-width:0}
.list-item-title{font-size:0.875rem;font-weight:700;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.list-item-sub{font-size:0.75rem;color:var(--text-2);margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.list-item-right{text-align:right;flex-shrink:0}
.list-item-amount{font-size:0.875rem;font-weight:700;letter-spacing:-0.01em}
.list-item-amount.danger{color:var(--danger)}
.list-item-amount.success{color:var(--success)}
.list-item-amount.warning{color:var(--warning)}
.list-item-date{font-size:0.68rem;color:var(--text-3);margin-top:2px;font-weight:500}

/* == Search == */
.search-container {
  padding:0.75rem 1rem 0.5rem;
  position:sticky;top:0px;
  background:var(--bg);z-index:50;
}
.search-wrap{position:relative;display:flex;align-items:center}
.search-icon{position:absolute;left:0.875rem;color:var(--text-3);display:flex;pointer-events:none}
.search-icon svg{width:16px;height:16px;stroke-width:2}
.search-input {
  width:100%;background:var(--bg-card);
  border:1.5px solid var(--border);border-radius:50px;
  padding:0.6rem 1rem 0.6rem 2.5rem;
  font-size:0.875rem;color:var(--text);
  outline:none;transition:border-color var(--tr),box-shadow var(--tr);
  font-weight:500;
}
.search-input:focus{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-bg)}
.search-input::placeholder{color:var(--text-3);font-weight:400}

.filter-row{display:flex;gap:0.5rem;padding:0.5rem 0 0;overflow-x:auto;scrollbar-width:none}
.filter-row::-webkit-scrollbar{display:none}
.filter-chip {
  flex-shrink:0;padding:0.25rem 0.75rem;border-radius:50px;
  font-size:0.72rem;font-weight:600;
  border:1.5px solid var(--border);background:var(--bg-card);
  color:var(--text-2);cursor:pointer;white-space:nowrap;
  transition:all var(--tr-s);
}
.filter-chip.active{background:var(--brand);border-color:var(--brand);color:white}

/* == Forms == */
.form-group{padding:0 1rem;margin-bottom:1rem}
.form-label{display:block;font-size:0.75rem;font-weight:600;color:var(--text-2);margin-bottom:0.375rem;letter-spacing:0.025em}
.form-control {
  width:100%;background:var(--bg-card);
  border:1.5px solid var(--border);border-radius:var(--radius-sm);
  padding:0.7rem 0.875rem;font-size:0.9375rem;color:var(--text);
  outline:none;
  transition:border-color var(--tr),box-shadow var(--tr);
  -webkit-appearance:none;
}
.form-control:focus{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-bg)}
.form-control:hover:not(:focus){border-color:var(--text-3)}
.form-control::placeholder{color:var(--text-3)}
select.form-control {
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394a3b8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 0.875rem center;
  padding-right:2.25rem;cursor:pointer;
}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:0.75rem;padding:0 1rem;margin-bottom:1rem}
.form-hint{font-size:0.72rem;color:var(--text-3);margin-top:0.3rem}
.form-error{font-size:0.78rem;color:var(--danger);margin-top:0.375rem;font-weight:500}
.form-error.hidden{display:none!important}

/* == Buttons == */
.btn {
  display:inline-flex;align-items:center;justify-content:center;gap:0.4rem;
  padding:0.7rem 1.25rem;border-radius:var(--radius-sm);
  font-size:0.875rem;font-weight:600;cursor:pointer;border:none;
  transition:all var(--tr-s);text-decoration:none;white-space:nowrap;
  -webkit-tap-highlight-color:transparent;user-select:none;letter-spacing:0.01em;
}
.btn:active{transform:scale(0.97)}
.btn:disabled{opacity:0.6;cursor:not-allowed;transform:none!important}
.btn-primary{background:linear-gradient(135deg,var(--brand) 0%,#6366f1 100%);color:white;box-shadow:0 2px 8px rgba(79,70,229,0.3)}
.btn-primary:hover{background:linear-gradient(135deg,var(--brand-hover) 0%,var(--brand) 100%);box-shadow:0 4px 16px rgba(79,70,229,0.4)}
.btn-success{background:var(--success);color:white}
.btn-success:hover{background:#15803d}
.btn-danger{background:var(--danger);color:white}
.btn-warning{background:var(--warning);color:white}
.btn-outline{background:transparent;border:1.5px solid var(--border);color:var(--text)}
.btn-outline:hover{border-color:var(--text-3);background:var(--bg-hover)}
.btn-ghost{background:var(--bg-input);color:var(--text)}
.btn-ghost:hover{background:var(--bg-hover)}
.btn-sm{padding:0.4rem 0.75rem;font-size:0.78rem;border-radius:var(--radius-xs)}
.btn-lg{padding:0.875rem 1.5rem;font-size:0.9375rem;border-radius:var(--radius-sm)}
.btn-block{width:100%}
.btn-row{display:flex;gap:0.625rem;padding:0.75rem 1rem}
.btn-row .btn{flex:1}

/* == FAB == */
.fab {
  position:fixed;bottom:calc(var(--nav-h) + 1rem);right:1rem;
  width:52px;height:52px;border-radius:16px;
  background:linear-gradient(135deg,var(--brand) 0%,#7c3aed 100%);color:white;border:none;
  font-size:1.5rem;display:flex;align-items:center;justify-content:center;
  box-shadow:0 6px 20px rgba(79,70,229,0.45),0 2px 6px rgba(0,0,0,0.15);cursor:pointer;z-index:90;
  transition:all var(--tr);
}
.fab:active{transform:scale(0.93)}
.fab:hover{background:linear-gradient(135deg,var(--brand-hover) 0%,#6d28d9 100%);box-shadow:0 8px 28px rgba(79,70,229,0.55),0 3px 8px rgba(0,0,0,0.2)}

/* == Invoice Items == */
.items-table-wrap{margin:0 1rem;border-radius:var(--radius);overflow:hidden;border:1px solid var(--border)}
.items-table{width:100%;border-collapse:collapse;background:var(--bg-card);font-size:0.82rem}
.items-table th{background:var(--brand);color:white;padding:0.6rem 0.625rem;text-align:left;font-weight:600;white-space:nowrap;font-size:0.75rem;letter-spacing:0.02em}
.items-table td{padding:0.6rem 0.625rem;border-bottom:1px solid var(--border);color:var(--text);vertical-align:top}
.items-table tr:last-child td{border-bottom:none}
.items-table tr:nth-child(even) td{background:var(--bg-input)}

.invoice-item-row{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-sm);padding:0.75rem;margin-bottom:0.5rem;position:relative}
.invoice-item-grid{display:grid;grid-template-columns:1fr 60px 72px 72px;gap:0.4rem;align-items:start}
.invoice-item-grid .form-control{padding:0.45rem 0.5rem;font-size:0.85rem}
.item-label{font-size:0.68rem;color:var(--text-3);margin-bottom:2px;font-weight:600;letter-spacing:0.02em}
.item-amount-display{font-size:0.82rem;font-weight:700;color:var(--brand);text-align:right;padding-top:0.3rem}
.item-remove-btn{position:absolute;top:0.5rem;right:0.5rem;background:var(--danger-bg);color:var(--danger);border:none;width:22px;height:22px;border-radius:50%;font-size:0.85rem;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background var(--tr-s)}
.item-remove-btn:hover{background:var(--danger);color:white}

/* == Invoice Summary == */
.invoice-summary{background:var(--bg-card);border-radius:var(--radius);border:1px solid var(--border);overflow:hidden;margin:0 1rem 1rem}
.summary-row{display:flex;justify-content:space-between;align-items:center;padding:0.6rem 1rem;border-bottom:1px solid var(--border);font-size:0.85rem}
.summary-row:last-child{border-bottom:none}
.summary-row.total{background:var(--brand);color:white;font-weight:700;font-size:0.9375rem}
.summary-row.outstanding{background:var(--danger-bg);color:var(--danger);font-weight:700}
.summary-label{color:inherit;font-weight:500}
.summary-value{font-weight:700}

/* == Invoice Print Template == */
#invoice-print-area{background:white;color:#1a1a1a;font-family:'Inter',Arial,sans-serif;max-width:390px;margin:1rem auto;border:1px solid #ddd;border-radius:10px;overflow:hidden;box-shadow:0 4px 24px rgba(0,0,0,0.10)}
.inv-accent-bar{height:5px;background:linear-gradient(90deg,#4f46e5,#7c3aed)}
.inv-header{padding:0.875rem 1rem 0.625rem;background:#fafafa;display:flex;justify-content:space-between;align-items:flex-start}
.inv-company{font-size:1rem;font-weight:800;color:#1a1a1a;margin-bottom:2px;letter-spacing:-0.01em}
.inv-contact{font-size:0.72rem;color:#666;line-height:1.65;display:flex;flex-direction:column}
.inv-title-badge{background:#1a1a1a;color:white;font-size:0.7rem;font-weight:800;letter-spacing:0.12em;padding:0.3rem 0.75rem;border-radius:4px;align-self:flex-start;margin-top:2px}
.inv-divider{height:1px;background:#e8e8e8;margin:0}
.inv-meta-row{display:flex;justify-content:space-between;align-items:flex-start;padding:0.75rem 1rem;border-bottom:1px solid #e8e8e8;gap:0.5rem}
.inv-bill-to{font-size:0.82rem;flex:1}
.inv-bill-label{font-size:0.62rem;color:#4f46e5;font-weight:700;text-transform:uppercase;letter-spacing:0.08em;margin-bottom:3px}
.inv-bill-name{font-size:0.92rem;font-weight:700;color:#1a1a1a}
.inv-bill-sub{font-size:0.72rem;color:#666;margin-top:1px}
.inv-number-section{text-align:right;flex-shrink:0}
.inv-num{font-size:1.05rem;font-weight:900;color:#1a1a1a;letter-spacing:-0.02em}
.inv-date-pill{display:inline-block;background:#f0f0f0;color:#444;font-size:0.68rem;font-weight:600;padding:0.2rem 0.5rem;border-radius:20px;margin-top:4px}
.inv-table{width:100%;border-collapse:collapse;font-size:0.76rem}
.inv-table th{background:#1a1a1a;color:white;padding:0.45rem 0.6rem;text-align:left;font-weight:600;font-size:0.66rem;text-transform:uppercase;letter-spacing:0.05em}
.inv-table th:last-child,.inv-table td:last-child{text-align:right}
.inv-table td{padding:0.42rem 0.6rem;border-bottom:1px solid #f0f0f0;vertical-align:top}
.inv-table tr:nth-child(even) td{background:#f9f9f9}
.inv-item-desc{font-weight:600;color:#1a1a1a;font-size:0.78rem}
.inv-item-cat{font-style:italic;color:#888;font-size:0.67rem;margin-top:1px}
.inv-totals{border-top:2px solid #1a1a1a}
.inv-total-row{display:flex;justify-content:space-between;padding:0.28rem 1rem;font-size:0.8rem;align-items:center}
.inv-total-row.subtotal{padding-top:0.5rem;color:#555;border-bottom:1px solid #f0f0f0}
.inv-total-row.grand-total{background:#1a1a1a;color:white;font-weight:800;font-size:0.875rem;padding:0.5rem 1rem}
.inv-total-row.paid-row{color:#16a34a;font-weight:600}
.inv-total-row.balance-row{color:#dc2626;font-weight:600}
.inv-total-row.prev-bal-row{color:#d97706;font-weight:600;font-size:0.77rem;background:#fffbeb}
.inv-total-row.outstanding-row{color:#dc2626;font-weight:800;background:#fff2f2;border-top:2px solid #fecaca;padding:0.45rem 1rem;font-size:0.875rem}
.inv-footer{padding:0.7rem 1rem;border-top:1px solid #e8e8e8;display:flex;justify-content:space-between;align-items:flex-end;background:#fafafa}
.inv-footer-note{font-size:0.63rem;color:#999;line-height:1.55}
.inv-footer-sign{font-size:0.67rem;color:#444;text-align:right}
.inv-sign-line{width:80px;height:1px;background:#999;margin:0 0 4px auto}

/* == Ledger == */
.ledger-table-wrap{overflow-x:auto;padding:0 1rem 1rem}
.ledger-table{width:100%;border-collapse:collapse;font-size:0.8rem;min-width:320px}
.ledger-table th{background:var(--brand);color:white;padding:0.5rem 0.625rem;text-align:left;font-weight:600;white-space:nowrap;font-size:0.72rem;letter-spacing:0.02em}
.ledger-table td{padding:0.6rem 0.625rem;border-bottom:1px solid var(--border);vertical-align:middle}
.ledger-table tr:hover td{background:var(--bg-hover)}
.ledger-debit{color:var(--danger);font-weight:700}
.ledger-credit{color:var(--success);font-weight:700}
.ledger-bal{font-weight:700}

/* == Badges == */
.badge{display:inline-flex;align-items:center;padding:0.18em 0.55em;border-radius:50px;font-size:0.68rem;font-weight:700;letter-spacing:0.03em}
.badge-success{background:var(--success-bg);color:var(--success)}
.badge-danger{background:var(--danger-bg);color:var(--danger)}
.badge-warning{background:var(--warning-bg);color:var(--warning)}
.badge-accent{background:var(--brand-bg);color:var(--brand)}

/* == Toast == */
#toast-container{position:fixed;bottom:calc(var(--nav-h) + 12px);left:50%;transform:translateX(-50%);width:calc(100% - 2rem);max-width:440px;z-index:1000;display:flex;flex-direction:column;gap:0.5rem;pointer-events:none}
.toast{background:#1e293b;color:#f1f5f9;padding:0.7rem 1rem;border-radius:var(--radius-sm);font-size:0.835rem;font-weight:500;box-shadow:var(--shadow-md);display:flex;align-items:center;gap:0.625rem;animation:toastIn 200ms ease forwards}
.toast.success{border-left:3px solid #22c55e}
.toast.error{border-left:3px solid #f43f5e}
.toast.info{border-left:3px solid #6366f1}
.toast.warning{border-left:3px solid #f59e0b}
.toast-icon{display:flex;align-items:center;flex-shrink:0}
.toast-icon svg{display:block}
@keyframes toastIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}

/* == Loading == */
#loading-screen{position:fixed;inset:0;background:var(--bg);display:flex;flex-direction:column;align-items:center;justify-content:center;z-index:9999;gap:1.25rem;transition:opacity 300ms}
#loading-screen.hidden{opacity:0;pointer-events:none}
.spinner{width:36px;height:36px;border:3px solid var(--border);border-top-color:var(--brand);border-radius:50%;animation:spin 700ms linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.loading-text{font-size:0.82rem;color:var(--text-3);font-weight:500}

/* == Login Page == */
#view-login {
  display: none; /* hidden until .active added by JS */
  min-height: 100dvh;
  flex-direction: column;
  align-items: center;justify-content: center;
  padding: 1.5rem;
  background: var(--bg);
  position: relative;overflow: hidden;
}
#view-login.active {
  display: flex;
}
#view-login::before {
  content: '';position: absolute;top: -20%;left: 50%;
  transform: translateX(-50%);
  width: 600px;height: 600px;
  background: radial-gradient(ellipse at center,rgba(79,70,229,0.1) 0%,transparent 65%);
  pointer-events: none;
}
.login-card {
  width: 100%;max-width: 400px;
  background: var(--bg-card);border: 1px solid var(--border);
  border-radius: var(--radius-xl);padding: 2.25rem 2rem 2rem;
  box-shadow: var(--shadow-lg);position: relative;z-index: 1;
}
.login-logo-wrap {display: flex;flex-direction: column;align-items: center;margin-bottom: 2rem}
.login-logo {
  width: 64px;height: 64px;
  background: linear-gradient(135deg,var(--brand) 0%,#8b5cf6 100%);
  border-radius: 18px;
  display: flex;align-items: center;justify-content: center;
  margin-bottom: 1rem;box-shadow: var(--shadow-brand);
}
.login-logo svg{width:32px;height:32px;stroke:white;stroke-width:1.75}
.login-title{font-size:1.375rem;font-weight:800;color:var(--text);letter-spacing:-0.02em;margin-bottom:0.25rem}
.login-sub{font-size:0.8125rem;color:var(--text-3)}
.login-form{display:flex;flex-direction:column;gap:1rem}
.login-form .form-group{padding:0;margin-bottom:0}
.login-form .form-label{font-size:0.8rem;font-weight:600;color:var(--text-2);margin-bottom:0.4rem}
.password-wrap{position:relative;display:flex;align-items:center}
.password-wrap .form-control{padding-right:2.75rem}
.password-toggle{position:absolute;right:0.75rem;background:none;border:none;cursor:pointer;color:var(--text-3);padding:0.25rem;display:flex;align-items:center;justify-content:center;border-radius:4px;transition:color var(--tr-s)}
.password-toggle:hover{color:var(--text-2)}
.password-toggle svg{width:16px;height:16px;stroke-width:2}
#login-error{background:var(--danger-bg);color:var(--danger);border:1px solid rgba(220,38,38,0.15);border-radius:var(--radius-sm);padding:0.6rem 0.875rem;font-size:0.8125rem;font-weight:500}
#login-error.hidden{display:none}
.login-hint{text-align:center;font-size:0.75rem;color:var(--text-3);margin-top:0.625rem;display:flex;align-items:center;justify-content:center;gap:0.375rem}
.login-hint svg{width:13px;height:13px;stroke-width:2;flex-shrink:0}

/* == Dashboard Hero == */
.dashboard-hero{background:linear-gradient(135deg,var(--brand) 0%,#7c3aed 100%);color:white;padding:1.375rem 1.25rem 1.625rem;position:relative;overflow:hidden}
.dashboard-hero::before{content:'';position:absolute;top:-45px;left:-25px;width:170px;height:170px;background:rgba(255,255,255,0.05);border-radius:50%;pointer-events:none}
.dashboard-hero::after{content:'';position:absolute;bottom:-30px;right:-30px;width:140px;height:140px;background:rgba(255,255,255,0.07);border-radius:50%;pointer-events:none}
.hero-greeting{font-size:0.8125rem;opacity:0.8}
.hero-name{font-size:1.25rem;font-weight:800;margin-bottom:1.25rem;letter-spacing:-0.02em}
.hero-stats-row{display:grid;grid-template-columns:1fr 1fr 1fr;gap:0.5rem;position:relative;z-index:1}
.hero-stat{background:rgba(255,255,255,0.18);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border-radius:10px;padding:0.6rem 0.5rem;text-align:center;border:1px solid rgba(255,255,255,0.2)}
.hero-stat-val{font-size:0.975rem;font-weight:800;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;letter-spacing:-0.01em}
.hero-stat-lbl{font-size:0.575rem;opacity:0.75;margin-top:2px;font-weight:500;text-transform:uppercase;letter-spacing:0.04em}

/* == Quick Actions == */
.quick-actions{display:grid;grid-template-columns:1fr 1fr;gap:0.625rem;padding:0 1rem 0.375rem}
.quick-action{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:0.875rem 0.75rem;display:flex;flex-direction:column;align-items:center;gap:0.5rem;cursor:pointer;transition:all var(--tr);text-align:center}
.quick-action:active{background:var(--bg-hover);transform:scale(0.97)}
.quick-action:active .quick-action-icon{transform:scale(0.92)}
.quick-action-icon{width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;transition:transform var(--tr-s)}
.quick-action-icon svg{width:22px;height:22px;stroke-width:1.75}
.quick-action-label{font-size:0.76rem;font-weight:600;color:var(--text)}

/* == Empty State == */
.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:2.5rem 1.5rem;text-align:center}
.empty-icon{width:64px;height:64px;border-radius:18px;background:var(--bg-input);display:flex;align-items:center;justify-content:center;margin-bottom:1rem;color:var(--text-3)}
.empty-icon svg{width:28px;height:28px;stroke-width:1.5}
.empty-title{font-size:0.9375rem;font-weight:700;margin-bottom:0.375rem}
.empty-sub{font-size:0.8125rem;color:var(--text-3);margin-bottom:1.25rem}

/* == Settings == */
.settings-item{display:flex;align-items:center;gap:0.875rem;padding:0.75rem 0;border-bottom:1px solid var(--border);cursor:pointer;transition:background var(--tr-s)}
.settings-item:last-child{border-bottom:none}
.settings-icon{width:38px;height:38px;border-radius:10px;background:var(--brand-bg);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.settings-icon svg{width:18px;height:18px;stroke:var(--brand);stroke-width:1.75}
.settings-label{flex:1;font-size:0.875rem;font-weight:600}
.settings-value{font-size:0.78rem;color:var(--text-3)}

/* == Toggle == */
.toggle{position:relative;width:42px;height:24px;cursor:pointer;flex-shrink:0}
.toggle input{opacity:0;width:0;height:0}
.toggle-slider{position:absolute;inset:0;background:var(--border);border-radius:50px;transition:background var(--tr)}
.toggle-slider::before{content:'';position:absolute;left:3px;bottom:3px;width:18px;height:18px;border-radius:50%;background:white;transition:transform var(--tr);box-shadow:0 1px 4px rgba(0,0,0,0.2)}
.toggle input:checked+.toggle-slider{background:var(--brand)}
.toggle input:checked+.toggle-slider::before{transform:translateX(18px)}

/* == Sync indicator == */
#sync-indicator{position:fixed;top:calc(var(--topbar-h) + 4px);left:50%;transform:translateX(-50%);background:var(--success);color:white;font-size:0.7rem;font-weight:600;padding:0.2rem 0.75rem;border-radius:50px;z-index:200;animation:slideDown 250ms ease;display:none;white-space:nowrap}
#sync-indicator.visible{display:block}
@keyframes slideDown{from{opacity:0;transform:translateX(-50%) translateY(-8px)}to{opacity:1;transform:translateX(-50%) translateY(0)}}

/* == Network status == */
#network-status{font-size:0.68rem;font-weight:700;padding:0.2rem 0.6rem;border-radius:50px;letter-spacing:0.04em;white-space:nowrap}
#network-status.online{background:var(--success-bg);color:var(--success)}
#network-status.offline{background:var(--danger-bg);color:var(--danger)}

/* == Views == */
.view{display:none}
.view.active{display:block;animation:viewFadeIn 180ms ease forwards}
@keyframes viewFadeIn{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}

/* == Customer Info Card == */
.customer-info-card{background:linear-gradient(135deg,var(--brand) 0%,#7c3aed 100%);color:white;padding:1.25rem 1.25rem 1.375rem;position:relative;overflow:hidden}
.customer-info-card::after{content:'';position:absolute;bottom:-20px;right:-20px;width:100px;height:100px;background:rgba(255,255,255,0.08);border-radius:50%;pointer-events:none}
.cust-shop{font-size:1.0625rem;font-weight:800;letter-spacing:-0.01em}
.cust-name{font-size:0.8125rem;opacity:0.8;margin-top:2px}
.cust-phone{font-size:0.78rem;opacity:0.65;margin-top:2px}
.cust-balance-row{display:flex;justify-content:space-between;margin-top:1.125rem;position:relative;z-index:1}
.cust-bal-item{text-align:center}
.cust-bal-val{font-size:0.95rem;font-weight:800;letter-spacing:-0.01em}
.cust-bal-lbl{font-size:0.6rem;opacity:0.75;margin-top:1px;text-transform:uppercase;letter-spacing:0.04em;font-weight:500}

/* == Payment History == */
.payment-item{display:flex;align-items:center;gap:0.75rem;padding:0.8rem 0;border-bottom:1px solid var(--border)}
.payment-item:last-child{border-bottom:none}

/* == Utilities == */
.text-center{text-align:center}.text-right{text-align:right}
.text-accent{color:var(--brand)}.text-danger{color:var(--danger)}
.text-success{color:var(--success)}.text-muted{color:var(--text-3)}
.font-bold{font-weight:700}
.mt-1{margin-top:.25rem}.mt-2{margin-top:.5rem}.mt-3{margin-top:.75rem}.mt-4{margin-top:1rem}
.mb-1{margin-bottom:.25rem}.mb-2{margin-bottom:.5rem}.mb-3{margin-bottom:.75rem}.mb-4{margin-bottom:1rem}
.flex{display:flex}.flex-center{display:flex;align-items:center;justify-content:center}
.gap-1{gap:.25rem}.gap-2{gap:.5rem}.gap-3{gap:.75rem}
.hidden{display:none!important}.p-1{padding:1rem}
.ripple{position:relative;overflow:hidden}

/* == Scrollbars == */
::-webkit-scrollbar{width:4px;height:4px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}

/* == Print == */
@media print{
  .topbar,.bottom-nav,.fab,#toast-container,#sync-indicator,.btn-row,.no-print{display:none!important}
  #invoice-print-area{max-width:100%;border:none;box-shadow:none;border-radius:0;margin:0}
  .inv-accent-bar{print-color-adjust:exact;-webkit-print-color-adjust:exact}
  .inv-title-badge,.inv-table th,.inv-total-row.grand-total{print-color-adjust:exact;-webkit-print-color-adjust:exact}
  body{background:white}
}

/* =====================================================
   SIDEBAR — hidden on mobile
===================================================== */
#sidebar{display:none}

/* =====================================================
   DESKTOP LAYOUT >= 900px
===================================================== */
@media(min-width:900px){

  body{overflow-x:hidden}

  #app{max-width:100%;width:100%;flex-direction:row;margin:0}

  #sidebar{
    display:flex;flex-direction:column;
    width:var(--sidebar-w);min-height:100vh;
    background:var(--bg-card);border-right:1px solid var(--border);
    position:fixed;left:0;top:0;bottom:0;z-index:200;overflow:hidden;
  }

  .sidebar-brand{display:flex;align-items:center;gap:0.75rem;padding:1.125rem 1rem 1rem;border-bottom:1px solid var(--border);flex-shrink:0}
  .sidebar-logo{width:38px;height:38px;background:linear-gradient(135deg,var(--brand) 0%,#7c3aed 100%);border-radius:10px;display:flex;align-items:center;justify-content:center;flex-shrink:0;box-shadow:0 2px 10px rgba(79,70,229,0.3)}
  .sidebar-logo svg{width:20px;height:20px;stroke:white;stroke-width:1.75}
  .sidebar-brand-name{font-size:0.875rem;font-weight:800;color:var(--text);line-height:1.2;letter-spacing:-0.01em}
  .sidebar-brand-sub{font-size:0.65rem;color:var(--text-3);margin-top:1px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:150px}

  .sidebar-nav{flex:1;padding:0.625rem;display:flex;flex-direction:column;gap:1px;overflow-y:auto}

  .sidebar-nav-item{
    display:flex;align-items:center;gap:0.625rem;
    padding:0.625rem 0.75rem;border-radius:var(--radius-sm);
    border:none;background:none;color:var(--text-2);
    cursor:pointer;font-size:0.8375rem;font-weight:600;
    text-align:left;width:100%;transition:all var(--tr-s);
    position:relative;
  }
  .sidebar-nav-item:hover{background:var(--brand-bg);color:var(--brand)}
  .sidebar-nav-item.active{background:var(--brand-bg);color:var(--brand);font-weight:700}
  .sidebar-nav-item.active::before{content:'';position:absolute;left:0;top:20%;bottom:20%;width:3px;background:var(--brand);border-radius:0 3px 3px 0}
  .sidebar-nav-icon{display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;width:20px;height:20px}
  .sidebar-nav-icon svg{width:18px;height:18px;stroke:currentColor;stroke-width:1.75}
  .sidebar-nav-label{flex:1}

  .sidebar-quick{padding:0 0.625rem 0.625rem;flex-shrink:0;display:flex;flex-direction:column;gap:0.375rem}
  .sidebar-quick .btn{font-size:0.78rem;padding:0.5rem 0.75rem;border-radius:var(--radius-sm);justify-content:flex-start;gap:0.5rem}

  .sidebar-footer{padding:0.75rem 0.875rem;border-top:1px solid var(--border);display:flex;align-items:center;gap:0.5rem;flex-shrink:0}
  .sidebar-user{display:flex;align-items:center;gap:0.5rem;flex:1;min-width:0}
  .sidebar-user-avatar{width:32px;height:32px;border-radius:50%;background:linear-gradient(135deg,var(--brand),#8b5cf6);color:white;display:flex;align-items:center;justify-content:center;font-size:0.7rem;font-weight:800;flex-shrink:0;letter-spacing:0.02em}
  .sidebar-user-info{min-width:0}
  .sidebar-user-name{font-size:0.78rem;font-weight:700;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .sidebar-network{font-size:0.65rem;color:var(--success);font-weight:600;margin-top:1px}
  .sidebar-network.offline{color:var(--danger)}
  .sidebar-logout-btn{background:none;border:none;cursor:pointer;padding:0.375rem;border-radius:8px;flex-shrink:0;color:var(--text-3);display:flex;align-items:center;justify-content:center;transition:all var(--tr-s)}
  .sidebar-logout-btn:hover{background:var(--danger-bg);color:var(--danger)}
  .sidebar-logout-btn svg{width:16px;height:16px;stroke-width:2}

  .bottom-nav{display:none!important}

  .topbar{left:var(--sidebar-w);transform:none;max-width:calc(100% - var(--sidebar-w));width:calc(100% - var(--sidebar-w))}

  .page-content{margin-left:var(--sidebar-w);max-width:none;padding-bottom:2.5rem}

  #toast-container{bottom:1.5rem;left:auto;right:1.5rem;transform:none;width:auto;min-width:300px}

  .fab{bottom:1.5rem;right:2rem}

  #sync-indicator{left:calc(var(--sidebar-w) + 50%);transform:translateX(-50%)}

  .hero-stats-row{grid-template-columns:repeat(4,1fr)}
  .quick-actions{grid-template-columns:repeat(4,1fr)}
  .stats-grid{grid-template-columns:repeat(4,1fr)}
  .stat-card.full{grid-column:span 2}

  .page-content>.view>*{max-width:1100px;margin-left:auto;margin-right:auto}

  .list-item:hover{background:var(--bg-hover);box-shadow:var(--shadow-sm);border-color:var(--brand-border)}
  .quick-action:hover{background:var(--bg-hover);border-color:var(--brand-border);transform:translateY(-2px);box-shadow:var(--shadow-sm)}
  .quick-action:hover .quick-action-icon{transform:scale(1.08)}

  #view-invoice-detail{max-width:860px;margin:0 auto;padding:0 2rem}
  #invoice-print-area{max-width:480px;margin:1.5rem auto}

  #view-customer-form form,#view-invoice-create form{max-width:720px;margin:0 auto}

  .dashboard-hero{padding:1.75rem 1.5rem 2rem}
  .hero-name{font-size:1.5rem}

  #view-login{background:linear-gradient(135deg,rgba(79,70,229,0.04) 0%,transparent 60%),var(--bg)}
  .login-card{padding:2.5rem 2.25rem 2.25rem}
}

@media(min-width:1280px){
  :root{--sidebar-w:256px}
  .page-content>.view>*{max-width:1200px}
}