:root {
  --bg: #0d0d1a;
  --surface: #16162a;
  --surface2: #1e1e38;
  --border: #2a2a4a;
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --success: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
  --text: #e2e8f0;
  --text-muted: #94a3b8;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  min-height: 100vh;
}

/* ── Auth screens ────────────────────────────────────── */
.auth-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 1rem;
}

.auth-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.5rem 2rem;
  width: 100%;
  max-width: 400px;
  box-shadow: var(--shadow);
}

.auth-card h1 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.auth-card p {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-bottom: 2rem;
}

/* ── Form elements ───────────────────────────────────── */
.field { margin-bottom: 1rem; }

label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
  font-weight: 500;
  letter-spacing: 0.03em;
}

input, select, textarea {
  width: 100%;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  padding: 0.65rem 0.85rem;
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.2s;
}

input:focus, select:focus, textarea:focus {
  border-color: var(--primary);
}

select option { background: var(--surface2); }

/* ── Buttons ─────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.65rem 1.2rem;
  border-radius: 8px;
  border: none;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}
.btn:active { transform: scale(0.97); }

.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }

.btn-full { width: 100%; justify-content: center; }

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #dc2626; }

.btn-sm { padding: 0.4rem 0.75rem; font-size: 0.8rem; }

.btn-icon {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.3rem;
  border-radius: 6px;
  display: inline-flex;
  align-items: center;
  transition: color 0.15s, background 0.15s;
}
.btn-icon:hover { color: var(--text); background: var(--surface2); }

/* ── Dashboard layout ───────────────────────────────── */
#dashboard { display: none; flex-direction: column; min-height: 100vh; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.topbar-title {
  font-size: 1.1rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.topbar-actions { display: flex; gap: 0.5rem; align-items: center; }

.content {
  padding: 1.5rem;
  flex: 1;
}

.device-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.25rem;
}

/* ── Device card ────────────────────────────────────── */
.device-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.2s;
}
.device-card:hover { border-color: var(--primary); }

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1rem 0.75rem;
  border-bottom: 1px solid var(--border);
}

.card-title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 600;
  font-size: 0.95rem;
}

.card-type-badge {
  font-size: 0.7rem;
  color: var(--text-muted);
  background: var(--surface2);
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  border: 1px solid var(--border);
}

.card-body { padding: 0.75rem 1rem 1rem; }

.card-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

/* ── Properties ─────────────────────────────────────── */
.prop-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
  gap: 0.75rem;
}
.prop-row:last-child { border-bottom: none; }

.prop-name {
  font-size: 0.85rem;
  color: var(--text-muted);
  flex-shrink: 0;
  min-width: 80px;
}

.prop-control { flex: 1; display: flex; justify-content: flex-end; align-items: center; gap: 0.5rem; }

/* Toggle switch */
.toggle-wrap { display: flex; align-items: center; gap: 0.5rem; }

.toggle {
  position: relative;
  width: 44px;
  height: 24px;
  cursor: pointer;
}
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
  position: absolute;
  inset: 0;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 999px;
  transition: background 0.2s;
}
.toggle-slider::before {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--text-muted);
  top: 3px;
  left: 3px;
  transition: transform 0.2s, background 0.2s;
}
.toggle input:checked + .toggle-slider { background: var(--success); border-color: var(--success); }
.toggle input:checked + .toggle-slider::before { transform: translateX(20px); background: #fff; }

/* Range slider */
.range-wrap { display: flex; align-items: center; gap: 0.5rem; width: 100%; }
.range-val { font-size: 0.8rem; color: var(--text); min-width: 35px; text-align: right; }
input[type=range] {
  flex: 1;
  accent-color: var(--primary);
  height: 4px;
  padding: 0;
  cursor: pointer;
}

/* Select */
.prop-select { max-width: 140px; font-size: 0.85rem; padding: 0.35rem 0.6rem; }

/* Button */
.prop-btn { font-size: 0.8rem; }

/* ── Modal ───────────────────────────────────────────── */
.overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
  z-index: 100;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}
.overlay.open { display: flex; }

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  width: 100%;
  max-width: 520px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--surface);
}

.modal-header h2 { font-size: 1.1rem; font-weight: 700; }

.modal-body { padding: 1.25rem 1.5rem; }

.modal-footer {
  display: flex;
  gap: 0.75rem;
  justify-content: flex-end;
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border);
}

/* ── Property editor ────────────────────────────────── */
.prop-list-editor { display: flex; flex-direction: column; gap: 0.5rem; margin-top: 0.5rem; }

.prop-editor-row {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.prop-editor-row-top {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.prop-editor-row-top input,
.prop-editor-row-top select {
  flex: 1;
  padding: 0.4rem 0.6rem;
  font-size: 0.82rem;
}

.prop-config-area {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
}
.prop-config-area input, .prop-config-area select {
  font-size: 0.8rem;
  padding: 0.35rem 0.5rem;
}

.sensor-config-area {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 0.5rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
  margin-top: 0.4rem;
}
.sensor-config-area.icon-config {
  grid-template-columns: 1fr 1fr 1fr 1fr;
}
.sensor-config-area label {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}
.sensor-config-area input,
.sensor-config-area select {
  font-size: 0.8rem;
  padding: 0.35rem 0.5rem;
}

/* Durum ikonu — kart üzerinde */
.status-icon svg { display: block; }
.status-label { font-variant-numeric: tabular-nums; }

.color-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  flex-shrink: 0;
  border: 1px solid rgba(255,255,255,0.2);
}

/* ── Toast ───────────────────────────────────────────── */
.toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  z-index: 1000;
}

.toast {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  box-shadow: var(--shadow);
  animation: slide-in 0.2s ease;
  max-width: 280px;
}
.toast.success { border-color: var(--success); }
.toast.error { border-color: var(--danger); }

@keyframes slide-in {
  from { transform: translateX(100%); opacity: 0; }
  to   { transform: translateX(0); opacity: 1; }
}

/* ── Misc ────────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--text-muted);
}
.empty-state svg { opacity: 0.3; margin-bottom: 1rem; }
.empty-state h3 { margin-bottom: 0.5rem; }

.error-msg {
  color: var(--danger);
  font-size: 0.82rem;
  margin-top: 0.35rem;
}

.section-title {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
}

hr.divider { border: none; border-top: 1px solid var(--border); margin: 1rem 0; }

/* ── Connection info page ────────────────────────────── */
.conn-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 1.5rem;
  overflow: hidden;
}

.conn-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.25rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface2);
}

.conn-url-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 1.25rem;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}

.conn-method {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--success);
  background: rgba(16,185,129,0.12);
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  flex-shrink: 0;
}

.conn-url-inline {
  font-size: 0.82rem;
  color: var(--primary);
  word-break: break-all;
}

/* İki sütun: Gönderilen | Alınan */
.conn-packets {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.conn-packet {
  padding: 1rem 1.25rem;
}
.conn-packet:first-child {
  border-right: 1px solid var(--border);
}

.conn-packet-header {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  font-weight: 700;
  margin-bottom: 0.65rem;
}
.conn-packet-header.sent     { color: #f59e0b; }
.conn-packet-header.received { color: var(--success); }

.conn-packet-sub {
  font-size: 0.72rem;
  font-weight: 400;
  color: var(--text-muted);
  margin-left: 0.15rem;
}

.conn-custom-badge {
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--primary);
  background: rgba(99,102,241,0.15);
  padding: 0.1rem 0.45rem;
  border-radius: 999px;
  margin-left: auto;
}

.conn-json {
  font-size: 0.78rem;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  overflow-x: auto;
  line-height: 1.6;
  margin: 0 0 0.65rem;
  white-space: pre;
}

.conn-keys {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.5rem;
}

.conn-no-keys {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-style: italic;
  margin-top: 0.35rem;
}

.conn-key-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.75rem;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.18rem 0.55rem;
}
.conn-key-chip span { color: var(--text-muted); }
.sensor-chip { border-color: rgba(99,102,241,0.4); }

/* Sensör değer gösterimi — cihaz kartı */
.sensor-row { background: rgba(99,102,241,0.04); }
.sensor-name { color: var(--primary) !important; font-size: 0.8rem !important; }
.sensor-value {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}
.sensor-chart-btn {
  opacity: 0;
  transition: opacity 0.15s;
  color: var(--primary) !important;
}
.sensor-row:hover .sensor-chart-btn { opacity: 1; }

/* ── Chart stats ─────────────────────────────────────── */
.chart-stat {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  flex: 1;
  min-width: 80px;
}
.chart-stat-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.chart-stat-val {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}
.chart-stat:first-child .chart-stat-val { color: var(--primary); }

/* ── Firmware page ───────────────────────────────────── */
.fw-upload-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1.5rem;
}

.fw-upload-area {
  border: 2px dashed var(--border);
  border-radius: 10px;
  padding: 2rem 1rem;
  text-align: center;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  transition: border-color 0.2s, background 0.2s;
}
.fw-upload-area:hover {
  border-color: var(--primary);
  background: rgba(99,102,241,0.04);
}
.fw-upload-area p { font-size: 0.9rem; color: var(--text); margin: 0; }

.fw-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 0.85rem;
  overflow: hidden;
}

.fw-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: 0.85rem 1rem 0.6rem;
}

.fw-name { font-weight: 600; font-size: 0.95rem; }
.fw-meta { font-size: 0.75rem; color: var(--text-muted); margin-top: 0.2rem; }
.fw-desc-text { font-size: 0.78rem; color: var(--text-muted); margin-top: 0.2rem; font-style: italic; }

.fw-url-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1rem;
  background: var(--bg);
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}

.fw-url {
  font-size: 0.78rem;
  color: var(--primary);
  flex: 1;
  word-break: break-all;
  min-width: 0;
}

/* ── Mobil: Sensör grafik butonu her zaman görünür ──── */
@media (hover: none) {
  .sensor-chart-btn { opacity: 1 !important; }
}

/* ── Mobil: 768px altı ───────────────────────────────── */
@media (max-width: 768px) {
  /* Topbar */
  .topbar { padding: 0.75rem 1rem; gap: 0.5rem; }
  .topbar-title { font-size: 0.9rem; }
  .topbar-actions { gap: 0.25rem; }

  /* Topbar butonlarda metin gizle, sadece ikon göster */
  .topbar-actions .btn-ghost .btn-text { display: none; }
  .topbar-actions .btn-sm { padding: 0.4rem 0.5rem; }

  /* İçerik padding */
  .content { padding: 1rem; }

  /* Cihaz grid tek sütun */
  .device-grid { grid-template-columns: 1fr; }

  /* Modal */
  .modal { max-height: 95vh; border-radius: 12px 12px 0 0; }
  .overlay { align-items: flex-end; padding: 0; }
  .modal-body { padding: 1rem; }
  .modal-header { padding: 1rem; }
  .modal-footer { padding: 0.75rem 1rem; }

  /* Prop config alanları */
  .prop-config-area { grid-template-columns: 1fr 1fr; }
  .sensor-config-area { grid-template-columns: 1fr 1fr; }
  .sensor-config-area.icon-config { grid-template-columns: 1fr 1fr; }

  /* Prop editör üst satır */
  .prop-editor-row-top { flex-wrap: wrap; }
  .prop-editor-row-top input,
  .prop-editor-row-top select { min-width: 0; }

  /* Bağlantı bilgileri */
  .conn-packets { grid-template-columns: 1fr; }
  .conn-packet:first-child { border-right: none; border-bottom: 1px solid var(--border); }
  .conn-header { flex-direction: column; align-items: flex-start; gap: 0.5rem; }

  /* Firmware */
  .fw-url-row { flex-direction: column; align-items: flex-start; }
  .fw-url { width: 100%; }

  /* Toast */
  .toast-container { bottom: 1rem; right: 1rem; left: 1rem; }
  .toast { max-width: 100%; }

  /* Chart modal */
  #chart-modal .modal { max-width: 100%; border-radius: 12px 12px 0 0; }
  #chart-stats { flex-wrap: wrap; }
  .chart-stat { min-width: 40%; }
}