/* ===== AquaLink Mobile PWA CSS — 1:1 Android Material Design ===== */
:root {
  --primary: #0ea5e9; --primary-dark: #0284c7; --primary-50: #f0f9ff;
  --primary-100: #e0f2fe; --primary-700: #0369a1;
  --bg: #f8fafc; --card-bg: #ffffff; --white: #ffffff;
  --text: #171717; --text-2: #64748b; --text-hint: #94a3b8;
  --success: #10b981; --warning: #f59e0b; --warning-bg: #fffbeb;
  --error: #ef4444; --error-bg: #fee2e2; --divider: #e2e8f0;
  --radius: 12px; --radius-lg: 16px; --nav-h: 56px;
}
* { margin:0; padding:0; box-sizing:border-box; -webkit-tap-highlight-color:transparent; }
html,body { font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Noto Sans SC",sans-serif; background:var(--bg); color:var(--text); overscroll-behavior-y:none; }
body { height:100vh; height:100dvh; overflow:hidden; }
button { cursor:pointer; font-family:inherit; border:none; background:none; }
input,select,textarea { font-family:inherit; }
input:focus { outline:none; }
.fragment { display:none; height:calc(100vh - var(--nav-h)); height:calc(100dvh - var(--nav-h)); overflow-y:auto; -webkit-overflow-scrolling:touch; }
.fragment.active { display:block; }
.scroll-content { padding:12px; }

/* ===== Login Page ===== */
.login-page { min-height:100vh; min-height:100dvh; display:flex; flex-direction:column; align-items:center; justify-content:center; padding:24px; background:var(--bg); }
.login-logo { width:80px; height:80px; border-radius:20px; overflow:hidden; background:url('/static/img/favicon.png') center/cover; margin-bottom:8px; }
.login-title { font-size:28px; font-weight:700; color:var(--primary); margin-bottom:4px; }
.login-subtitle { font-size:14px; color:var(--text-2); margin-bottom:40px; }
.login-card { width:100%; max-width:400px; background:var(--card-bg); border-radius:var(--radius); box-shadow:0 4px 24px rgba(0,0,0,0.06); padding:16px; }
.form-group { margin-bottom:12px; }
.form-group label { display:block; font-size:12px; color:var(--text-2); margin-bottom:4px; }
.form-group input { width:100%; height:48px; border:1px solid var(--divider); border-radius:8px; padding:0 12px; font-size:14px; background:var(--card-bg); transition:border-color 0.2s; }
.form-group input:focus { border-color:var(--primary); border-width:2px; }
.btn-primary { width:100%; height:48px; background:var(--primary); color:#fff; border-radius:12px; font-size:16px; font-weight:500; margin-top:8px; transition:opacity 0.2s; }
.btn-primary:active { opacity:0.8; }
.btn-primary:disabled { opacity:0.5; }
.login-error { color:var(--error); font-size:13px; margin-top:8px; text-align:center; min-height:20px; }

/* ===== Bottom Nav ===== */
.bottom-nav { position:fixed; bottom:0; left:0; right:0; height:var(--nav-h); background:var(--white); display:flex; box-shadow:0 -1px 4px rgba(0,0,0,0.06); z-index:100; padding-bottom:env(safe-area-inset-bottom); }
.nav-item { flex:1; display:flex; flex-direction:column; align-items:center; justify-content:center; gap:2px; color:var(--text-hint); font-size:11px; padding-top:4px; }
.nav-item i { font-size:20px; }
.nav-item.active { color:var(--primary); }

/* ===== AI FAB ===== */
.ai-fab { position:fixed; right:16px; bottom:calc(var(--nav-h) + 16px); width:56px; height:56px; border-radius:28px; background:var(--primary); color:#fff; display:flex; align-items:center; justify-content:center; font-size:24px; box-shadow:0 4px 8px rgba(14,165,233,0.4); z-index:99; }
.ai-fab:active { transform:scale(0.95); }

/* ===== Section Title ===== */
.section-title { font-size:16px; font-weight:700; color:var(--text); margin-bottom:8px; }
.section-header-row { display:flex; align-items:center; justify-content:space-between; margin-bottom:8px; }
.hint-text { font-size:11px; color:var(--text-2); }

/* ===== Card ===== */
.card-list { display:flex; flex-direction:column; gap:0; }
.m-card { background:var(--card-bg); border-radius:var(--radius); box-shadow:0 2px 4px rgba(0,0,0,0.04); padding:12px; margin-bottom:4px; }
.m-card-horizontal { display:flex; align-items:center; gap:0; }

/* Sensor Card */
.sensor-card { background:var(--card-bg); border-radius:var(--radius); box-shadow:0 2px 4px rgba(0,0,0,0.04); padding:12px; margin-bottom:4px; }
.sensor-name { font-size:14px; font-weight:700; color:var(--text); }
.sensor-type { font-size:12px; color:var(--text-2); margin-top:2px; }
.sensor-value { font-size:20px; font-weight:700; color:var(--primary); margin-top:4px; }
.sensor-time { font-size:10px; color:var(--text-hint); margin-top:2px; }

/* Device Card */
.device-card { background:var(--card-bg); border-radius:var(--radius); box-shadow:0 2px 4px rgba(0,0,0,0.04); padding:12px; margin-bottom:4px; display:flex; align-items:center; }
.device-info { flex:1; }
.device-name { font-size:14px; font-weight:700; color:var(--text); }
.device-status { font-size:12px; margin-top:2px; }
.switch { position:relative; width:44px; height:24px; flex-shrink:0; }
.switch input { display:none; }
.switch-track { position:absolute; inset:0; background:#cbd5e1; border-radius:12px; transition:background 0.2s; }
.switch-thumb { position:absolute; left:2px; top:2px; width:20px; height:20px; background:#fff; border-radius:50%; box-shadow:0 1px 3px rgba(0,0,0,0.2); transition:transform 0.2s; }
.switch input:checked ~ .switch-track { background:var(--primary); }
.switch input:checked ~ .switch-thumb { transform:translateX(20px); }

/* Rule / Alert Rule / Task Card */
.rule-card { background:var(--card-bg); border-radius:var(--radius); box-shadow:0 2px 4px rgba(0,0,0,0.04); padding:12px; margin-bottom:4px; display:flex; align-items:center; }
.rule-info { flex:1; }
.rule-name { font-size:14px; font-weight:700; color:var(--text); }
.rule-cond { font-size:12px; color:var(--text-2); margin-top:2px; }
.rule-action { font-size:12px; color:var(--text-2); margin-top:2px; }
.rule-cooldown { font-size:12px; color:var(--text-2); margin-top:2px; }
.rule-severity { font-size:11px; color:var(--warning); }
.rule-actions { display:flex; gap:8px; margin-left:8px; }
.icon-btn { width:32px; height:32px; display:flex; align-items:center; justify-content:center; font-size:18px; }

/* Alert Card */
.alert-card { background:var(--card-bg); border-radius:var(--radius); box-shadow:0 2px 4px rgba(0,0,0,0.04); padding:12px; margin-bottom:4px; display:flex; align-items:center; }
.alert-severity-bar { width:4px; height:40px; border-radius:2px; margin-right:12px; flex-shrink:0; }
.alert-info { flex:1; }
.alert-type { font-size:13px; font-weight:700; color:var(--text); }
.alert-msg { font-size:12px; color:var(--text-2); margin-top:2px; }
.alert-time { font-size:11px; color:var(--text-2); margin-top:2px; }

/* ===== Status Dot ===== */
.status-dot { display:inline-block; width:8px; height:8px; border-radius:50%; }
.board-status { display:flex; align-items:center; gap:6px; padding-bottom:8px; }

/* ===== Buttons ===== */
.btn-tonal { background:var(--primary-100); color:var(--primary); border:none; border-radius:12px; height:40px; padding:0 16px; font-size:14px; font-weight:500; }
.btn-tonal:active { opacity:0.8; }
.btn-tonal:disabled { opacity:0.5; }
.btn-outlined { background:transparent; border:1px solid var(--divider); border-radius:12px; height:40px; padding:0 16px; font-size:14px; color:var(--text); }
.btn-outlined:active { background:var(--bg); }
.btn-sm { height:36px; font-size:12px; padding:0 12px; }
.btn-danger { background:var(--error); color:#fff; border-radius:12px; height:40px; padding:0 16px; font-size:14px; font-weight:500; }
.btn-logout { width:100%; background:var(--error-bg); color:var(--error); border:none; border-radius:12px; height:48px; font-size:15px; font-weight:500; margin:24px 0; }

/* ===== Select / Input ===== */
.select-input { height:40px; border:1px solid var(--divider); border-radius:12px; padding:0 8px; font-size:14px; background:var(--card-bg); margin-right:6px; }
.text-input-dense { width:100%; height:44px; border:1px solid var(--divider); border-radius:8px; padding:0 8px; font-size:13px; margin-bottom:4px; background:var(--card-bg); }
.text-input-dense:focus { border-color:var(--primary); }
.select-input-dense { width:100%; height:44px; border:1px solid var(--divider); border-radius:8px; padding:0 8px; font-size:13px; margin-bottom:4px; background:var(--card-bg); }
textarea.text-input-dense { height:auto; padding:8px; resize:vertical; }

/* ===== Toolbar Rows ===== */
.sensors-toolbar { display:flex; align-items:center; margin-bottom:8px; }
.controls-btns { display:flex; gap:8px; margin-top:8px; margin-bottom:16px; }
.controls-btns .btn-tonal { flex:1; }
.camera-btns { display:flex; gap:8px; margin-top:12px; }
.camera-toolbar { display:flex; gap:4px; align-items:center; margin-bottom:8px; }
.camera-toolbar .btn-tonal, .camera-toolbar .btn-outlined { font-size:12px; height:36px; padding:0 10px; }

/* ===== Camera ===== */
.snapshot-area { width:100%; height:240px; background:#f8fafc; border-radius:12px; display:flex; flex-direction:column; align-items:center; justify-content:center; gap:8px; color:var(--text-2); }
.snapshot-area img { width:100%; height:100%; object-fit:cover; border-radius:12px; }
.camera-card { background:var(--card-bg); border-radius:var(--radius); box-shadow:0 2px 4px rgba(0,0,0,0.04); padding:12px; margin-bottom:4px; }
.camera-control-card { background:var(--card-bg); border-radius:var(--radius); box-shadow:0 2px 4px rgba(0,0,0,0.04); padding:12px; }
.stream-preview { width:100%; height:120px; background:#f8fafc; border-radius:12px; display:flex; flex-direction:column; align-items:center; justify-content:center; gap:8px; color:var(--text-2); margin:8px 0; }
.recording-item { background:var(--card-bg); border-radius:var(--radius); box-shadow:0 2px 4px rgba(0,0,0,0.04); padding:10px; margin-bottom:8px; display:flex; align-items:center; }
.recording-info { flex:1; }
.recording-name { font-size:13px; color:var(--text); }
.recording-time { font-size:11px; color:var(--text-hint); }

/* ===== Settings ===== */
.settings-card { background:var(--card-bg); border-radius:var(--radius); box-shadow:0 2px 4px rgba(0,0,0,0.04); padding:16px; margin-bottom:12px; display:flex; flex-direction:column; }
.settings-row { padding:4px 0; }
.settings-text { font-size:14px; color:var(--text); }
.settings-text.secondary { color:var(--text-2); margin-top:4px; }
.switch-row { display:flex; align-items:center; gap:8px; padding:8px 0; font-size:14px; }
.switch-row input[type=checkbox] { width:20px; height:20px; accent-color:var(--primary); }

/* ===== Chart ===== */
.chart-card { background:var(--card-bg); border-radius:var(--radius); padding:8px; }

/* ===== Offline Banner ===== */
.offline-banner { background:var(--warning-bg); color:var(--warning); font-size:12px; padding:8px; border-radius:8px; text-align:center; margin-bottom:8px; }

/* ===== Alert Banner ===== */
.alert-banner { display:flex; align-items:center; gap:10px; padding:12px 14px; color:#fff; font-size:14px; font-weight:500; max-width:100%; }
.alert-banner-msg { flex:1; overflow:hidden; text-overflow:ellipsis; }
.alert-banner-close { cursor:pointer; opacity:0.8; }

/* ===== AI Chat ===== */
.ai-chat-overlay { position:fixed; inset:0; background:var(--bg); z-index:200; display:flex; flex-direction:column; }
.ai-chat-header { height:52px; background:var(--primary); color:#fff; display:flex; align-items:center; justify-content:space-between; padding:0 16px; font-size:18px; font-weight:700; flex-shrink:0; }
.ai-chat-header i { cursor:pointer; font-size:20px; }
.ai-chat-messages { flex:1; overflow-y:auto; padding:12px; -webkit-overflow-scrolling:touch; }
.ai-progress { height:4px; background:var(--primary-100); flex-shrink:0; }
.ai-chat-input-area { display:flex; align-items:center; padding:8px; background:var(--card-bg); gap:4px; box-shadow:0 -1px 4px rgba(0,0,0,0.06); flex-shrink:0; padding-bottom:calc(8px + env(safe-area-inset-bottom)); }
.ai-chat-input-area input { flex:1; height:48px; border:none; background:transparent; font-size:14px; padding:8px; }
.ai-send-btn { width:48px; height:48px; display:flex; align-items:center; justify-content:center; color:var(--primary); font-size:20px; }
.chat-welcome { background:var(--primary-50); color:var(--primary-700); border-radius:16px; padding:10px; font-size:14px; max-width:280px; margin-bottom:8px; align-self:flex-start; }
.chat-user { background:var(--primary); color:#fff; border-radius:16px; padding:10px; font-size:14px; max-width:280px; margin-bottom:8px; align-self:flex-end; }
.chat-assistant { background:var(--card-bg); border-radius:16px; padding:10px; font-size:14px; max-width:280px; margin-bottom:8px; box-shadow:0 1px 3px rgba(0,0,0,0.06); align-self:flex-start; }
.chat-thinking-section { background:var(--primary-50); border-radius:8px; padding:8px; margin-bottom:8px; }
.chat-thinking-toggle { font-size:12px; font-weight:700; color:var(--primary); cursor:pointer; }
.chat-thinking-text { font-size:11px; color:var(--text-2); margin-top:6px; white-space:pre-wrap; max-height:180px; overflow-y:auto; }
.chat-action-card { background:var(--primary-50); border-radius:8px; padding:8px; margin-top:8px; font-size:12px; color:var(--primary-700); }
.chat-action-btns { display:flex; gap:8px; margin-top:6px; }
.ai-chat-messages { display:flex; flex-direction:column; }

/* ===== Refresh Header ===== */
.refresh-header { display:none; padding:8px; text-align:center; }
.refresh-header.active { display:block; }
.refresh-spinner { display:inline-flex; align-items:center; gap:8px; color:var(--primary); font-size:14px; }
.spinner-small { width:24px; height:24px; border:2px solid var(--primary-100); border-top-color:var(--primary); border-radius:50%; animation:spin 0.8s linear infinite; }
.spinner { width:36px; height:36px; border:3px solid var(--primary-100); border-top-color:var(--primary); border-radius:50%; animation:spin 0.8s linear infinite; }
@keyframes spin { to { transform:rotate(360deg); } }

/* ===== Modal ===== */
.modal-overlay { position:fixed; inset:0; background:rgba(0,0,0,0.5); z-index:300; display:flex; align-items:center; justify-content:center; }
.modal-card { width:90%; max-width:360px; max-height:80vh; background:var(--card-bg); border-radius:16px; overflow:hidden; display:flex; flex-direction:column; }
.modal-header { display:flex; align-items:center; justify-content:space-between; padding:16px; border-bottom:1px solid var(--divider); }
.modal-header h3 { font-size:18px; font-weight:700; }
.modal-close { font-size:20px; color:var(--text-hint); }
.modal-body { padding:16px; overflow-y:auto; flex:1; }
.modal-footer { display:flex; gap:8px; padding:16px; border-top:1px solid var(--divider); justify-content:flex-end; }
.modal-body .form-group { margin-bottom:12px; }
.modal-body select { width:100%; height:44px; border:1px solid var(--divider); border-radius:8px; padding:0 8px; font-size:14px; }

/* ===== Loading Overlay ===== */
.loading-overlay { position:fixed; inset:0; background:rgba(0,0,0,0.3); z-index:400; display:flex; flex-direction:column; align-items:center; justify-content:center; gap:12px; }
.loading-spinner { display:flex; flex-direction:column; align-items:center; gap:8px; background:var(--card-bg); padding:24px; border-radius:16px; }
.loading-spinner span { font-size:14px; color:var(--text); }

/* ===== Empty State ===== */
.empty-state { text-align:center; padding:40px 0; color:var(--text-2); }
.empty-state i { font-size:36px; }
.empty-state span { display:block; margin-top:8px; font-size:14px; }