@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;700&family=Space+Mono:wght@400;700&family=Doto:wght@100..900&display=swap');

:root {
  --black: #000000;
  --surface: #111111;
  --surface-raised: #1A1A1A;
  --border: #222222;
  --border-visible: #333333;
  --text-disabled: #666666;
  --text-secondary: #999999;
  --text-primary: #E8E8E8;
  --text-display: #FFFFFF;
  --accent: #D71921;
  --accent-subtle: rgba(215,25,33,0.15);
  --success: #4A9E5C;
  --warning: #D4A843;
  --interactive: #5B9BF6;

  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;
}

/* ======== LIGHT THEME ======== */
[data-theme="light"] {
  --black: #F5F5F5;
  --surface: #FFFFFF;
  --surface-raised: #EEEEEE;
  --border: #E0E0E0;
  --border-visible: #CCCCCC;
  --text-disabled: #AAAAAA;
  --text-secondary: #666666;
  --text-primary: #222222;
  --text-display: #000000;
  --accent: #D71921;
  --accent-subtle: rgba(215,25,33,0.10);
  --success: #2E7D32;
  --warning: #B8860B;
  --interactive: #1565C0;
}

[data-theme="light"] body {
  background: #F5F5F5;
}

[data-theme="light"] ::-webkit-scrollbar-track { background: #F0F0F0; }
[data-theme="light"] ::-webkit-scrollbar-thumb { background: #CCCCCC; }

[data-theme="light"] .modal-overlay { background: rgba(0,0,0,0.4); }

[data-theme="light"] .form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23888' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
}

/* ======== THEME TOGGLE BUTTON ======== */
.theme-toggle {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border-visible);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  transition: all 0.15s;
  flex-shrink: 0;
}
.theme-toggle:hover {
  border-color: var(--text-primary);
  color: var(--text-display);
}

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

body {
  font-family: 'Space Grotesk', 'DM Sans', system-ui, sans-serif;
  background: var(--black);
  color: var(--text-primary);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  transition: background 0.2s, color 0.2s;
}

/* ========= NAV ========= */
.nav {
  background: var(--black);
  border-bottom: 1px solid var(--border-visible);
  padding: 0 var(--space-xl);
  height: 56px;
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  position: sticky;
  top: 0;
  z-index: 100;
}
.nav-brand {
  font-family: 'Space Mono', monospace;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-display);
  text-decoration: none;
  white-space: nowrap;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 0;
}
.nav-link {
  font-family: 'Space Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-disabled);
  text-decoration: none;
  padding: 0 var(--space-md);
  height: 56px;
  display: flex;
  align-items: center;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}
.nav-link:hover { color: var(--text-primary); }
.nav-link.active { color: var(--text-display); border-bottom-color: var(--accent); }

.nav-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: var(--space-md);
}
.nav-user {
  font-family: 'Space Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

/* ========= BUTTONS ========= */
.btn {
  font-family: 'Space Mono', monospace;
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 10px 20px;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.15s ease;
  border: none;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  white-space: nowrap;
}
.btn-primary {
  background: var(--text-display);
  color: var(--black);
}
.btn-primary:hover { background: var(--text-primary); }
.btn-secondary {
  background: transparent;
  border: 1px solid var(--border-visible);
  color: var(--text-primary);
}
.btn-secondary:hover { border-color: var(--text-secondary); color: var(--text-display); }
.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: none;
  padding: 8px 12px;
}
.btn-ghost:hover { color: var(--text-primary); }
.btn-danger {
  background: transparent;
  border: 1px solid var(--border-visible);
  color: var(--text-secondary);
}
.btn-danger:hover { border-color: var(--accent); color: var(--accent); }
.btn-sm { padding: 6px 14px; font-size: 11px; min-height: 32px; }

/* ========= INPUTS ========= */
.form-group { margin-bottom: var(--space-md); }
.tax-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-md); }
.form-label {
  display: block;
  font-family: 'Space Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: var(--space-xs);
}
.form-input,
.form-select,
.form-textarea {
  width: 100%;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--border-visible);
  color: var(--text-primary);
  font-family: 'Space Mono', monospace;
  font-size: 14px;
  padding: var(--space-sm) 0;
  outline: none;
  transition: border-color 0.15s;
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-bottom-color: var(--text-primary);
}
.form-input::placeholder, .form-textarea::placeholder { color: var(--text-disabled); }
.form-textarea { resize: vertical; min-height: 72px; }
.form-input[readonly] { color: var(--text-disabled); cursor: not-allowed; }
.form-select { cursor: pointer; appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23666' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 4px center; }

/* ========= CARDS ========= */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: var(--space-lg);
}
.card-raised {
  background: var(--surface-raised);
  border: 1px solid var(--border-visible);
  border-radius: 12px;
  padding: var(--space-lg);
}

/* ========= STAT CARDS ========= */
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: var(--space-lg) var(--space-xl);
}
.stat-label {
  font-family: 'Space Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
}
.stat-value {
  font-family: 'Space Mono', monospace;
  font-size: 32px;
  font-weight: 700;
  color: var(--text-display);
  letter-spacing: -0.02em;
  line-height: 1;
}
.stat-sub {
  font-family: 'Space Mono', monospace;
  font-size: 11px;
  color: var(--text-disabled);
  margin-top: var(--space-sm);
  letter-spacing: 0.04em;
}
.stat-card.accent .stat-value { color: var(--accent); }
.stat-card.success .stat-value { color: var(--success); }

/* ========= TABLE ========= */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
thead th {
  font-family: 'Space Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
  padding: var(--space-sm) var(--space-md);
  text-align: left;
  border-bottom: 1px solid var(--border-visible);
  white-space: nowrap;
  font-weight: 400;
}
tbody td {
  padding: 14px var(--space-md);
  border-bottom: 1px solid var(--border);
  color: var(--text-primary);
  font-size: 14px;
  vertical-align: middle;
}
tbody tr { transition: background 0.1s; }
tbody tr:hover { background: var(--surface); }
tbody tr:last-child td { border-bottom: none; }
tbody tr.editing-row { background: var(--surface-raised); border-left: 2px solid var(--accent); }

.td-mono {
  font-family: 'Space Mono', monospace;
  font-size: 13px;
}
.td-secondary { color: var(--text-secondary); font-size: 13px; }

/* ========= TAGS ========= */
.tag {
  display: inline-block;
  font-family: 'Space Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 4px;
  border: 1px solid var(--border-visible);
  color: var(--text-secondary);
}
.tag-out { border-color: var(--accent); color: var(--accent); }
.tag-in { border-color: var(--success); color: var(--success); }
.tag-invoiced { border-color: var(--success); color: var(--success); }
.tag-uninvoiced { border-color: var(--border-visible); color: var(--text-disabled); }
.tag-paid { border-color: var(--success); color: var(--success); }
.tag-unpaid { border-color: var(--warning); color: var(--warning); }

/* ========= AMOUNTS ========= */
.amount-out { font-family: 'Space Mono', monospace; color: var(--accent); font-weight: 700; }
.amount-in  { font-family: 'Space Mono', monospace; color: var(--success); font-weight: 700; }
.amount-mono { font-family: 'Space Mono', monospace; }

/* ========= PAGINATION ========= */
.pagination-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) 0 0;
  border-top: 1px solid var(--border);
  margin-top: var(--space-md);
  flex-wrap: wrap;
  gap: var(--space-md);
}
.pagination-left { display: flex; align-items: center; gap: 4px; }
.pagination-right { display: flex; align-items: center; gap: var(--space-md); }
.page-arrow {
  width: 32px; height: 32px;
  border: 1px solid var(--border-visible);
  background: transparent;
  color: var(--text-secondary);
  border-radius: 4px;
  cursor: pointer;
  font-size: 16px;
  transition: all 0.15s;
  display: flex; align-items: center; justify-content: center;
}
.page-arrow:hover:not(:disabled) { border-color: var(--text-primary); color: var(--text-display); }
.page-arrow:disabled { opacity: 0.3; cursor: not-allowed; }
.page-num-btn {
  width: 32px; height: 32px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-secondary);
  border-radius: 4px;
  cursor: pointer;
  font-family: 'Space Mono', monospace;
  font-size: 12px;
  transition: all 0.15s;
}
.page-num-btn:hover:not(.active) { color: var(--text-display); }
.page-num-btn.active { border-color: var(--text-display); color: var(--text-display); }
.page-ellipsis { color: var(--text-disabled); font-family: 'Space Mono', monospace; font-size: 12px; padding: 0 4px; }
.page-total {
  font-family: 'Space Mono', monospace;
  font-size: 11px;
  color: var(--text-disabled);
  letter-spacing: 0.04em;
}
.page-size-select {
  background: transparent;
  border: 1px solid var(--border-visible);
  color: var(--text-secondary);
  font-family: 'Space Mono', monospace;
  font-size: 11px;
  padding: 4px 8px;
  border-radius: 4px;
  cursor: pointer;
  outline: none;
}

/* ========= MODAL ========= */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.8);
  z-index: 2000;
  align-items: center;
  justify-content: center;
}
.modal-overlay.show { display: flex; }
.modal {
  background: var(--surface);
  border: 1px solid var(--border-visible);
  border-radius: 16px;
  padding: var(--space-xl);
  width: 480px;
  max-width: 95vw;
  animation: modalIn 0.2s ease;
}
@keyframes modalIn {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}
.modal-title {
  font-family: 'Space Mono', monospace;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-display);
  margin-bottom: var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.modal-close {
  font-family: 'Space Mono', monospace;
  font-size: 12px;
  color: var(--text-disabled);
  background: none;
  border: none;
  cursor: pointer;
  letter-spacing: 0.06em;
}
.modal-close:hover { color: var(--text-primary); }
.modal-actions { display: flex; gap: var(--space-sm); margin-top: var(--space-xl); }

/* ========= SEARCH / TOOLBAR ========= */
.toolbar {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
}
.search-input {
  background: transparent;
  border: 1px solid var(--border-visible);
  color: var(--text-primary);
  font-family: 'Space Mono', monospace;
  font-size: 12px;
  padding: 8px var(--space-md);
  border-radius: 4px;
  outline: none;
  transition: border-color 0.15s;
  min-width: 180px;
}
.search-input:focus { border-color: var(--text-secondary); }
.search-input::placeholder { color: var(--text-disabled); }
.search-select {
  background: var(--surface);
  border: 1px solid var(--border-visible);
  color: var(--text-primary);
  font-family: 'Space Mono', monospace;
  font-size: 12px;
  padding: 8px var(--space-md);
  border-radius: 4px;
  cursor: pointer;
  outline: none;
}

/* ========= UPLOAD ZONE ========= */
.upload-zone {
  border: 1px dashed var(--border-visible);
  border-radius: 8px;
  padding: var(--space-xl);
  text-align: center;
  cursor: pointer;
  transition: all 0.15s;
}
.upload-zone:hover, .upload-zone.dragover {
  border-color: var(--text-secondary);
  background: var(--surface-raised);
}
.upload-text {
  font-family: 'Space Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-disabled);
}
.upload-text span { color: var(--text-secondary); }

/* ========= SEGMENTED CONTROL ========= */
.seg-control {
  display: flex;
  border: 1px solid var(--border-visible);
  border-radius: 999px;
  overflow: hidden;
}
.seg-btn {
  flex: 1;
  font-family: 'Space Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 8px 16px;
  background: transparent;
  border: none;
  color: var(--text-disabled);
  cursor: pointer;
  transition: all 0.15s;
}
.seg-btn.active-out { background: var(--accent); color: var(--text-display); }
.seg-btn.active-in  { background: var(--success); color: var(--text-display); }

/* ========= SECTION HEADER ========= */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
  gap: var(--space-md);
}
.section-title {
  font-family: 'Space Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

/* ========= DOT GRID ========= */
.dot-grid {
  background-image: radial-gradient(circle, var(--border-visible) 1px, transparent 1px);
  background-size: 16px 16px;
}

/* ========= MISC ========= */
.empty-tip {
  text-align: center;
  padding: var(--space-4xl) 0;
  font-family: 'Space Mono', monospace;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-disabled);
}
.loading-tip {
  text-align: center;
  padding: var(--space-2xl) 0;
  font-family: 'Space Mono', monospace;
  font-size: 12px;
  color: var(--text-disabled);
  letter-spacing: 0.06em;
}
.summary-row td {
  background: var(--surface-raised);
  font-family: 'Space Mono', monospace;
  font-size: 12px;
  color: var(--text-secondary);
  border-top: 1px solid var(--border-visible);
}

/* ========= PDF PREVIEW ========= */
.pdf-preview {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--surface-raised);
  border: 1px solid var(--border-visible);
  border-radius: 8px;
  padding: var(--space-sm) var(--space-md);
  margin-top: var(--space-sm);
}
.pdf-name {
  font-family: 'Space Mono', monospace;
  font-size: 12px;
  color: var(--text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 200px;
}

/* ========= CUSTOMER DROPDOWN ========= */
.customer-dropdown {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--surface-raised);
  border: 1px solid var(--border-visible);
  border-radius: 8px;
  z-index: 100;
  max-height: 240px;
  overflow-y: auto;
  margin-top: 4px;
}
.customer-dropdown.show { display: block; }
.customer-option {
  padding: 10px var(--space-md);
  font-family: 'Space Mono', monospace;
  font-size: 12px;
  color: var(--text-primary);
  cursor: pointer;
  transition: background 0.1s;
  border-bottom: 1px solid var(--border);
}
.customer-option:last-child { border-bottom: none; }
.customer-option:hover { background: var(--surface); }
.customer-option.empty { color: var(--text-disabled); text-align: center; cursor: default; }
.customer-option .highlight { color: var(--text-display); }

/* ========= SCROLLBAR ========= */
::-webkit-scrollbar { width: 4px; height: 4px; }
::-webkit-scrollbar-track { background: var(--black); }
::-webkit-scrollbar-thumb { background: var(--border-visible); border-radius: 2px; }