:root {
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-right: env(safe-area-inset-right, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
  --bg: #0b1020;
  --bg-soft: #121a30;
  --card: rgba(18, 26, 48, 0.78);
  --border: rgba(255,255,255,0.12);
  --text: #f4f7fb;
  --muted: #9db0d0;
  --primary: #64d2ff;
  --primary-2: #7c8dff;
  --success: #2dd4bf;
  --warning: #f59e0b;
  --danger: #f87171;
  --shadow: 0 20px 60px rgba(0,0,0,.25);
}
* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
img { max-width: 100%; height: auto; }
svg { display: block; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

html, body { margin: 0; padding: 0; font-family: Inter, Arial, sans-serif; color: var(--text); background:
  radial-gradient(circle at top left, rgba(124,141,255,.28), transparent 30%),
  radial-gradient(circle at top right, rgba(100,210,255,.22), transparent 26%),
  linear-gradient(180deg, #09111f 0%, #0d1324 100%);
  min-height: 100%; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
button, .nav-link, .primary-btn, .ghost-btn, .danger-btn, .icon-btn { min-height: 44px; }

input, select, textarea { width: 100%; padding: 14px 16px; border-radius: 14px; border: 1px solid var(--border); background: rgba(255,255,255,.04); color: var(--text); font-size: 16px; }
label { display: grid; gap: 8px; color: var(--muted); font-size: 14px; }
button { cursor: pointer; border: 0; }
.page-shell, .dashboard-shell, .auth-layout { min-height: 100vh; min-height: 100svh; }
body { padding: var(--safe-top) var(--safe-right) var(--safe-bottom) var(--safe-left); }

.glass { background: var(--card); backdrop-filter: blur(18px); border: 1px solid var(--border); box-shadow: var(--shadow); }
.topbar { display:flex; justify-content:space-between; align-items:center; padding: 24px 32px; }
.brand { font-size: 24px; font-weight: 800; letter-spacing: .03em; }
.nav-actions, .cta-row { display:flex; gap: 12px; align-items:center; flex-wrap: wrap; }
.primary-btn, .ghost-btn, .danger-btn, .icon-btn { padding: 12px 18px; border-radius: 14px; transition: .2s ease; }
.primary-btn { background: linear-gradient(135deg, var(--primary), var(--primary-2)); color: #07111f; font-weight: 800; }
.primary-btn:hover { transform: translateY(-1px); }
.ghost-btn { background: rgba(255,255,255,.05); color: var(--text); border: 1px solid var(--border); }
.danger-btn { background: rgba(248,113,113,.13); color: #ffd8d8; border: 1px solid rgba(248,113,113,.4); }
.icon-btn { background: transparent; color: var(--text); font-size: 24px; }
.hero { margin: 24px 32px 0; padding: 48px; border-radius: 32px; display:grid; grid-template-columns: 1.2fr .9fr; gap: 32px; }
.hero h1 { font-size: clamp(38px, 6vw, 68px); line-height: 1.02; margin: 14px 0; }
.lead { font-size: 18px; color: var(--muted); max-width: 720px; }
.eyebrow { color: var(--primary); text-transform: uppercase; letter-spacing: .14em; font-size: 12px; font-weight: 700; }
.hero-card { padding: 24px; border-radius: 28px; background: rgba(255,255,255,.05); border:1px solid var(--border); }
.metric-grid, .section-grid, .stat-grid, .pricing-row { display:grid; gap: 16px; }
.metric-grid { grid-template-columns: repeat(2, 1fr); }
.metric-card, .feature-card, .price-card, .stat-card, .panel, .sidebar, .content-header, .modal-card, .auth-side, .auth-panel { border-radius: 24px; }
.metric-card, .price-card, .stat-card { padding: 20px; background: rgba(255,255,255,.04); border:1px solid var(--border); }
.metric-card span, .price-card span, .stat-card span, .muted, .hint-block { color: var(--muted); }
.metric-card strong, .price-card strong, .stat-card strong { display:block; margin-top: 8px; font-size: 26px; }
.status-pill { display:inline-flex; gap: 8px; align-items:center; padding: 8px 12px; border-radius: 999px; background: rgba(45,212,191,.14); color: #baf7ec; }
.status-pill.offline { background: rgba(248,113,113,.16); color:#ffd7d7; }
.section-grid { grid-template-columns: repeat(4, 1fr); margin: 24px 32px; }
.feature-card { padding: 24px; }
.pricing-row { grid-template-columns: repeat(3, 1fr); margin: 24px 32px 40px; }
.price-card.featured { outline: 2px solid rgba(100,210,255,.45); }
.auth-layout { display:grid; grid-template-columns: 1.05fr .95fr; gap: 24px; padding: 32px; align-items: stretch; }
.auth-side, .auth-panel { padding: 32px; }
.tabs { display:flex; gap: 8px; margin-bottom: 16px; }
.tab { flex:1; padding: 12px; border-radius: 14px; background: rgba(255,255,255,.05); color: var(--text); border: 1px solid transparent; }
.tab.active { border-color: rgba(100,210,255,.42); background: rgba(100,210,255,.1); }
.stack { display:grid; gap: 14px; }
.subtle-list { margin-top: 20px; color: var(--muted); }
.alert { padding: 14px 16px; border-radius: 14px; background: rgba(100,210,255,.11); color: #cff3ff; border:1px solid rgba(100,210,255,.22); }
.hidden { display:none !important; }
.dashboard-shell { display:grid; grid-template-columns: 280px 1fr; gap: 20px; padding: 20px; }
.sidebar { padding: 20px; display:flex; flex-direction:column; justify-content:space-between; }
.sidebar-group { display:grid; gap: 8px; margin: 22px 0; }
.nav-link { text-align:left; padding: 14px 16px; border-radius: 16px; background: transparent; color: var(--muted); }
.nav-link.active, .nav-link:hover { background: rgba(255,255,255,.06); color: var(--text); }
.full { width: 100%; }
.content-area { display:grid; gap: 18px; }
.content-header, .panel { padding: 22px; }
.panel-head { display:flex; justify-content:space-between; align-items:center; gap: 12px; margin-bottom: 16px; }
.card-list { display:grid; gap: 12px; }
.device-card, .sensor-card, .automation-card, .log-item, .support-box { background: rgba(255,255,255,.04); border:1px solid var(--border); border-radius: 20px; padding: 18px; }
.device-card:hover { transform: translateY(-1px); }
.device-top { display:flex; justify-content:space-between; gap: 10px; align-items:flex-start; }
.device-title { font-size: 22px; font-weight: 800; }
.device-meta, .mini { color: var(--muted); font-size: 14px; }
.pill { padding: 6px 10px; border-radius: 999px; font-size: 12px; font-weight: 700; }
.pill.online { background: rgba(45,212,191,.14); color: #baf7ec; }
.pill.offline { background: rgba(248,113,113,.14); color: #ffd7d7; }
.view { display:grid; gap: 18px; }
.form-grid { display:grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.form-grid .primary-btn { align-self:end; }
.inline-form { display:flex; gap: 12px; align-items:end; flex-wrap: wrap; }
.log-list { display:grid; gap: 10px; max-height: 520px; overflow:auto; }
.log-item strong { display:block; margin-bottom: 6px; }
.modal { position: fixed; inset: 0; background: rgba(0,0,0,.55); display:grid; place-items:center; padding:20px; }
.modal-card { width: min(560px, 100%); padding: 24px; }
.hint-block { padding: 16px; background: rgba(255,255,255,.04); border-radius: 16px; border: 1px solid var(--border); }
@media (max-width: 1100px) {
  .hero, .auth-layout, .dashboard-shell { grid-template-columns: 1fr; }
  .section-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-row { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .topbar, .hero, .auth-layout, .dashboard-shell { padding: 18px; margin: 0; }
  .hero { border-radius: 24px; }
  .section-grid, .pricing-row { margin: 18px; grid-template-columns: 1fr; }
  .form-grid, .metric-grid { grid-template-columns: 1fr; }
  .content-header h1, .hero h1 { font-size: 34px; }
}


.brand-with-icon { display:inline-flex; align-items:center; gap:12px; }
.brand-with-icon img { width:32px; height:32px; border-radius:10px; }
.alert.alert-error { background: rgba(248,113,113,.12); color: #ffd7d7; border-color: rgba(248,113,113,.28); }
.password-field { position: relative; display:flex; align-items:center; }
.password-field input { padding-right: 116px; }
.password-toggle { position:absolute; right:8px; top:50%; transform:translateY(-50%); padding:8px 12px; border-radius:12px; background: rgba(255,255,255,.06); color: var(--text); border:1px solid var(--border); font-size:13px; }
.password-toggle:hover { background: rgba(255,255,255,.1); }


body { overflow-x: hidden; }
.page-shell, .dashboard-shell, .auth-layout, .content-area, .panel, .content-header, .hero, .sidebar, .feature-card, .device-card, .sensor-card, .automation-card, .log-item, .support-box, .modal-card { min-width: 0; }
.device-title, .device-meta, .lead, .hint-block, .feature-card p, .log-item, .support-box, .panel, .content-header { overflow-wrap: anywhere; word-break: break-word; }
.sidebar-group, .nav-actions, .cta-row, .panel-head, .device-top, .inline-form, .tabs, .topbar { min-width: 0; }
.sidebar-group { overflow-x: auto; scrollbar-width: none; }
.sidebar-group::-webkit-scrollbar { display: none; }
.nav-link { white-space: nowrap; }
.content-area { min-width: 0; }
.panel-head { flex-wrap: wrap; }
.inline-form > * { min-width: 0; }
#summary-cards { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.auth-panel form, .auth-side { max-width: 100%; }
.hero-card, .feature-card, .price-card, .metric-card, .stat-card, .device-card, .sensor-card, .automation-card, .log-item, .support-box, .panel, .content-header, .sidebar, .auth-side, .auth-panel { box-shadow: var(--shadow); }

@media (max-width: 900px) {
  .dashboard-shell { grid-template-columns: 1fr; padding: 14px; gap: 14px; }
  .sidebar { gap: 16px; }
  .sidebar-group { display: flex; gap: 8px; flex-wrap: nowrap; }
  .nav-link { flex: 0 0 auto; }
  .content-header, .panel, .sidebar { padding: 18px; }
  #summary-cards { grid-template-columns: repeat(2, minmax(0, 1fr)) !important; }
}

@media (max-width: 720px) {
  body { min-width: 320px; }
  .topbar { padding: 14px 14px 10px; gap: 12px; align-items: stretch; }
  .topbar .nav-actions { width: 100%; }
  .topbar .nav-actions a { flex: 1 1 0; text-align: center; }
  .hero { padding: 18px; gap: 18px; }
  .hero h1 { font-size: clamp(28px, 9vw, 38px); line-height: 1.05; }
  .lead { font-size: 16px; }
  .page-shell { padding-bottom: calc(18px + var(--safe-bottom)); }
  .section-grid, .pricing-row { margin: 14px; gap: 14px; }
  .feature-card, .price-card, .metric-card, .stat-card { padding: 18px; }
  .auth-layout { padding: 14px; gap: 14px; }
  .auth-side, .auth-panel { padding: 20px; }
  .tabs { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .dashboard-shell { padding: 10px; gap: 10px; }
  .sidebar { position: sticky; top: calc(var(--safe-top) + 8px); z-index: 20; padding: 12px; border-radius: 18px; }
  .sidebar > div:first-child { display: grid; gap: 12px; }
  .brand { font-size: 20px; }
  .sidebar-group { display: flex; overflow-x: auto; gap: 8px; margin: 8px 0 0; padding-bottom: 2px; }
  .nav-link { padding: 12px 14px; border-radius: 14px; font-size: 14px; }
  .content-header, .panel { padding: 16px; border-radius: 18px; }
  .content-header h1 { font-size: 28px; line-height: 1.05; }
  .panel-head h2 { margin: 0; font-size: 20px; }
  .device-top { display: grid; grid-template-columns: 1fr; }
  .device-title { font-size: 20px; }
  .device-card, .sensor-card, .automation-card, .log-item, .support-box { padding: 16px; border-radius: 18px; }
  .form-grid { grid-template-columns: 1fr; gap: 12px; }
  .inline-form { display: grid; grid-template-columns: 1fr; align-items: stretch; }
  .inline-form .primary-btn, .inline-form .danger-btn, .form-grid .primary-btn, .form-grid .ghost-btn { width: 100%; }
  #summary-cards { grid-template-columns: 1fr 1fr !important; gap: 10px !important; }
  .metric-grid { grid-template-columns: 1fr; }
  .card-list, .log-list { gap: 10px; }
  .modal { padding: 12px; }
  .modal-card { padding: 18px; border-radius: 18px; }
  .password-field input { padding-right: 96px; }
  .password-toggle { right: 6px; padding: 8px 10px; font-size: 12px; }
}

@media (max-width: 420px) {
  .topbar, .hero, .auth-layout, .dashboard-shell { padding-left: 10px; padding-right: 10px; }
  .content-header h1, .hero h1 { font-size: 26px; }
  #summary-cards { grid-template-columns: 1fr !important; }
  .brand-with-icon img { width: 28px; height: 28px; }
  input, select, textarea { padding: 13px 14px; border-radius: 12px; }
  .primary-btn, .ghost-btn, .danger-btn, .icon-btn, .nav-link { border-radius: 12px; }
}


/* Mobile overlay fix for iOS PWA */
@media (max-width: 720px) {
  .dashboard-shell { align-items: start; }
  .sidebar { position: static !important; top: auto !important; z-index: 1 !important; }
  .modal { z-index: 2000; align-items: flex-start; padding-top: calc(var(--safe-top) + 12px); padding-bottom: calc(var(--safe-bottom) + 12px); overflow: auto; }
  .modal-card { width: 100%; max-width: 560px; max-height: calc(100svh - var(--safe-top) - var(--safe-bottom) - 24px); overflow: auto; margin: 0 auto; }
  .content-area { gap: 12px; }
  .content-header { padding: 14px; }
  .panel { padding: 14px; }
  .stat-grid { grid-template-columns: 1fr !important; }
}