/* BTEffect - Design System */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
    --bg-primary: #0a0a1a;
    --bg-secondary: #111128;
    --bg-card: rgba(255,255,255,0.05);
    --bg-card-hover: rgba(255,255,255,0.08);
    --glass-border: rgba(255,255,255,0.08);
    --glass-shadow: 0 8px 32px rgba(0,0,0,0.3);
    --accent-primary: #00e676;
    --accent-secondary: #00bfa5;
    --accent-gradient: linear-gradient(135deg, #00e676, #00bfa5);
    --accent-glow: 0 0 30px rgba(0,230,118,0.15);
    --text-primary: #ffffff;
    --text-secondary: rgba(255,255,255,0.7);
    --text-muted: rgba(255,255,255,0.4);
    --danger: #ff5252; --warning: #ffab40; --info: #40c4ff; --success: #69f0ae;
    --sidebar-width: 280px;
    --radius-sm: 8px; --radius-md: 12px; --radius-lg: 16px; --radius-xl: 20px; --radius-2xl: 24px;
    --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
}
* { margin:0; padding:0; box-sizing:border-box; }
body { font-family:'Inter',-apple-system,sans-serif; background:var(--bg-primary); color:var(--text-primary); min-height:100vh; overflow-x:hidden; }
body::before { content:''; position:fixed; inset:0; background:radial-gradient(ellipse at 20% 50%,rgba(0,230,118,0.04) 0%,transparent 60%),radial-gradient(ellipse at 80% 20%,rgba(0,191,165,0.04) 0%,transparent 50%); pointer-events:none; z-index:0; }
::-webkit-scrollbar { width:6px; }
::-webkit-scrollbar-track { background:var(--bg-secondary); }
::-webkit-scrollbar-thumb { background:rgba(255,255,255,0.15); border-radius:3px; }

.app-layout { display:flex; min-height:100vh; }

/* Sidebar */
.sidebar { position:fixed; left:0; top:0; width:var(--sidebar-width); height:100vh; background:rgba(17,17,40,0.95); backdrop-filter:blur(20px); border-right:1px solid var(--glass-border); display:flex; flex-direction:column; z-index:100; transition:var(--transition); }
.sidebar-logo { padding:24px; display:flex; align-items:center; gap:14px; border-bottom:1px solid var(--glass-border); }
.sidebar-logo .logo-icon { width:44px; height:44px; background:var(--accent-gradient); border-radius:var(--radius-md); display:flex; align-items:center; justify-content:center; font-size:20px; color:#000; font-weight:800; box-shadow:var(--accent-glow); }
.sidebar-logo h1 { font-size:22px; font-weight:800; background:var(--accent-gradient); -webkit-background-clip:text; -webkit-text-fill-color:transparent; }
.sidebar-logo span { font-size:11px; color:var(--text-muted); display:block; margin-top:2px; }
.sidebar-nav { flex:1; overflow-y:auto; padding:16px 12px; }
.nav-section { margin-bottom:24px; }
.nav-section-title { font-size:10px; font-weight:700; text-transform:uppercase; letter-spacing:1.5px; color:var(--text-muted); padding:0 12px; margin-bottom:8px; }
.nav-link { display:flex; align-items:center; gap:12px; padding:12px 16px; color:var(--text-secondary); text-decoration:none; border-radius:var(--radius-md); transition:var(--transition); font-size:14px; font-weight:500; position:relative; margin-bottom:2px; }
.nav-link:hover { background:var(--bg-card-hover); color:var(--text-primary); }
.nav-link.active { background:rgba(0,230,118,0.1); color:var(--accent-primary); }
.nav-link.active::before { content:''; position:absolute; left:0; top:50%; transform:translateY(-50%); width:3px; height:24px; background:var(--accent-gradient); border-radius:0 4px 4px 0; }
.nav-link i { width:20px; text-align:center; font-size:16px; }
.nav-link .badge { margin-left:auto; background:var(--accent-gradient); color:#000; font-size:10px; font-weight:700; padding:2px 8px; border-radius:10px; }
.sidebar-user { padding:16px; border-top:1px solid var(--glass-border); display:flex; align-items:center; gap:12px; }
.sidebar-user .avatar { width:40px; height:40px; border-radius:50%; background:var(--accent-gradient); display:flex; align-items:center; justify-content:center; font-weight:700; color:#000; font-size:14px; }
.sidebar-user .user-info { flex:1; }
.sidebar-user .user-info .name { font-size:13px; font-weight:600; }
.sidebar-user .user-info .email { font-size:11px; color:var(--text-muted); }
.sidebar-user .logout-btn { color:var(--text-muted); text-decoration:none; font-size:18px; transition:var(--transition); }
.sidebar-user .logout-btn:hover { color:var(--danger); }

/* Main */
.main-content { flex:1; margin-left:var(--sidebar-width); padding:30px 40px; position:relative; z-index:1; }
.page-header { display:flex; align-items:center; justify-content:space-between; margin-bottom:32px; }
.page-header h2 { font-size:28px; font-weight:800; display:flex; align-items:center; gap:12px; }
.page-header h2 i { color:var(--accent-primary); }
.page-header .subtitle { color:var(--text-secondary); font-size:14px; margin-top:4px; }

/* Cards */
.card { background:var(--bg-card); backdrop-filter:blur(20px); border:1px solid var(--glass-border); border-radius:var(--radius-xl); padding:24px; transition:var(--transition); }
.card:hover { border-color:rgba(255,255,255,0.12); box-shadow:var(--glass-shadow); }
.card-header { display:flex; align-items:center; justify-content:space-between; margin-bottom:20px; }
.card-title { font-size:16px; font-weight:700; display:flex; align-items:center; gap:10px; }
.card-title i { color:var(--accent-primary); }

/* Stats */
.stats-grid { display:grid; grid-template-columns:repeat(auto-fit,minmax(240px,1fr)); gap:20px; margin-bottom:32px; }
.stat-card { background:var(--bg-card); backdrop-filter:blur(20px); border:1px solid var(--glass-border); border-radius:var(--radius-xl); padding:24px; display:flex; align-items:center; gap:16px; transition:var(--transition); }
.stat-card:hover { transform:translateY(-4px); border-color:rgba(255,255,255,0.12); box-shadow:var(--glass-shadow); }
.stat-icon { width:56px; height:56px; border-radius:var(--radius-lg); display:flex; align-items:center; justify-content:center; font-size:22px; flex-shrink:0; }
.stat-icon.green { background:rgba(0,230,118,0.1); color:#00e676; }
.stat-icon.blue { background:rgba(64,196,255,0.1); color:#40c4ff; }
.stat-icon.orange { background:rgba(255,171,64,0.1); color:#ffab40; }
.stat-icon.purple { background:rgba(156,39,176,0.1); color:#ce93d8; }
.stat-icon.red { background:rgba(255,82,82,0.1); color:#ff5252; }
.stat-icon.teal { background:rgba(0,191,165,0.1); color:#00bfa5; }
.stat-info h3 { font-size:26px; font-weight:800; line-height:1; }
.stat-info p { font-size:12px; color:var(--text-secondary); margin-top:4px; }
.stat-info .trend { font-size:12px; font-weight:600; margin-top:6px; display:flex; align-items:center; gap:4px; }
.stat-info .trend.up { color:var(--success); }
.stat-info .trend.down { color:var(--danger); }

/* Grids */
.grid-2 { display:grid; grid-template-columns:repeat(2,1fr); gap:24px; margin-bottom:24px; }
.grid-3 { display:grid; grid-template-columns:repeat(3,1fr); gap:24px; margin-bottom:24px; }

/* Buttons */
.btn { display:inline-flex; align-items:center; gap:8px; padding:12px 24px; border:none; border-radius:var(--radius-md); font-family:'Inter',sans-serif; font-size:14px; font-weight:600; cursor:pointer; transition:var(--transition); text-decoration:none; line-height:1; }
.btn-primary { background:var(--accent-gradient); color:#000; box-shadow:var(--accent-glow); }
.btn-primary:hover { transform:translateY(-2px); box-shadow:0 8px 30px rgba(0,230,118,0.3); }
.btn-secondary { background:var(--bg-card); color:var(--text-primary); border:1px solid var(--glass-border); }
.btn-secondary:hover { background:var(--bg-card-hover); }
.btn-danger { background:rgba(255,82,82,0.15); color:var(--danger); border:1px solid rgba(255,82,82,0.2); }
.btn-sm { padding:8px 16px; font-size:12px; }
.btn-lg { padding:16px 32px; font-size:16px; border-radius:var(--radius-lg); }

/* Forms */
.form-group { margin-bottom:20px; }
.form-group label { display:block; font-size:13px; font-weight:600; color:var(--text-secondary); margin-bottom:8px; }
.form-group label i { margin-right:6px; color:var(--accent-primary); }
.form-control { width:100%; padding:14px 16px; background:rgba(255,255,255,0.04); border:1px solid var(--glass-border); border-radius:var(--radius-md); color:var(--text-primary); font-family:'Inter',sans-serif; font-size:14px; transition:var(--transition); outline:none; }
.form-control:focus { border-color:var(--accent-primary); box-shadow:0 0 0 3px rgba(0,230,118,0.1); background:rgba(255,255,255,0.06); }
.form-control::placeholder { color:var(--text-muted); }
select.form-control { appearance:none; background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12'%3E%3Cpath fill='%23ffffff80' d='M6 8L1 3h10z'/%3E%3C/svg%3E"); background-repeat:no-repeat; background-position:right 14px center; padding-right:40px; }
select.form-control option { background:var(--bg-secondary); color:var(--text-primary); }
textarea.form-control { resize:vertical; min-height:100px; }
.form-row { display:grid; grid-template-columns:repeat(2,1fr); gap:16px; }
.form-row-3 { display:grid; grid-template-columns:repeat(3,1fr); gap:16px; }

/* Tables */
.table-container { overflow-x:auto; border-radius:var(--radius-lg); }
table { width:100%; border-collapse:collapse; }
table th { text-align:left; padding:14px 16px; font-size:12px; font-weight:700; text-transform:uppercase; letter-spacing:0.5px; color:var(--text-muted); border-bottom:1px solid var(--glass-border); }
table td { padding:14px 16px; font-size:14px; border-bottom:1px solid rgba(255,255,255,0.03); }
table tr:hover td { background:rgba(255,255,255,0.02); }
.trend-up { color:var(--success); }
.trend-down { color:var(--danger); }

/* Progress */
.progress-bar-container { background:rgba(255,255,255,0.05); border-radius:20px; height:12px; overflow:hidden; }
.progress-bar { height:100%; background:var(--accent-gradient); border-radius:20px; transition:width 1s ease; }
.progress-info { display:flex; justify-content:space-between; font-size:12px; color:var(--text-secondary); margin-top:8px; }

/* Alerts */
.alert { padding:16px 20px; border-radius:var(--radius-md); margin-bottom:20px; display:flex; align-items:flex-start; gap:12px; font-size:14px; animation:slideDown 0.3s ease; }
@keyframes slideDown { from{opacity:0;transform:translateY(-10px)} to{opacity:1;transform:translateY(0)} }
.alert-success { background:rgba(105,240,174,0.1); border:1px solid rgba(105,240,174,0.2); color:var(--success); }
.alert-danger { background:rgba(255,82,82,0.1); border:1px solid rgba(255,82,82,0.2); color:var(--danger); }
.alert-info { background:rgba(64,196,255,0.1); border:1px solid rgba(64,196,255,0.2); color:var(--info); }
.alert-warning { background:rgba(255,171,64,0.1); border:1px solid rgba(255,171,64,0.2); color:var(--warning); }
.alert i { font-size:18px; margin-top:1px; }

/* AI Card */
.ai-card { background:linear-gradient(135deg,rgba(0,230,118,0.05),rgba(0,191,165,0.05)); border:1px solid rgba(0,230,118,0.15); border-radius:var(--radius-xl); padding:24px; position:relative; overflow:hidden; }
.ai-card::before { content:''; position:absolute; top:-2px; left:-2px; right:-2px; height:3px; background:var(--accent-gradient); border-radius:var(--radius-xl) var(--radius-xl) 0 0; }
.ai-card .ai-header { display:flex; align-items:center; gap:10px; margin-bottom:16px; font-size:14px; font-weight:700; color:var(--accent-primary); }
.ai-content { font-size:14px; line-height:1.8; color:var(--text-secondary); white-space:pre-wrap; }
.ai-content strong { color:var(--text-primary); }

/* Badges */
.badge-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(140px,1fr)); gap:16px; }
.badge-item { text-align:center; padding:20px 12px; background:var(--bg-card); border:1px solid var(--glass-border); border-radius:var(--radius-lg); transition:var(--transition); }
.badge-item:hover { transform:translateY(-4px); box-shadow:var(--glass-shadow); }
.badge-item.earned { border-color:rgba(255,215,0,0.3); }
.badge-item.locked { opacity:0.4; filter:grayscale(100%); }
.badge-item .badge-icon { font-size:32px; margin-bottom:8px; }
.badge-item .badge-name { font-size:12px; font-weight:700; }
.badge-item .badge-desc { font-size:10px; color:var(--text-muted); margin-top:4px; }

/* Water */
.water-grid { display:flex; gap:12px; flex-wrap:wrap; justify-content:center; padding:20px 0; }
.water-glass { width:50px; height:70px; background:rgba(64,196,255,0.08); border:2px solid rgba(64,196,255,0.15); border-radius:0 0 12px 12px; border-top:none; cursor:pointer; transition:var(--transition); position:relative; overflow:hidden; }
.water-glass.filled { border-color:rgba(64,196,255,0.4); }
.water-glass.filled::after { content:''; position:absolute; bottom:0; left:0; right:0; height:100%; background:linear-gradient(180deg,rgba(64,196,255,0.3),rgba(64,196,255,0.6)); animation:fillUp 0.5s ease; }
@keyframes fillUp { from{height:0} to{height:100%} }
.water-glass:hover { transform:scale(1.1); border-color:var(--info); }

/* Mood */
.mood-selector { display:flex; gap:12px; justify-content:center; }
.mood-option { width:50px; height:50px; border-radius:50%; display:flex; align-items:center; justify-content:center; font-size:24px; cursor:pointer; border:2px solid var(--glass-border); background:var(--bg-card); transition:var(--transition); }
.mood-option:hover,.mood-option.selected { transform:scale(1.15); border-color:var(--accent-primary); }
.mood-option input[type="radio"] { display:none; }

/* Auth */
.auth-page { min-height:100vh; display:flex; align-items:center; justify-content:center; background:linear-gradient(135deg,#0a0a1a 0%,#111128 50%,#0a0a1a 100%); position:relative; overflow:hidden; }
.auth-page::before { content:''; position:absolute; width:600px; height:600px; background:radial-gradient(circle,rgba(0,230,118,0.08) 0%,transparent 70%); top:-200px; right:-200px; }
.auth-card { background:rgba(255,255,255,0.04); backdrop-filter:blur(20px); border:1px solid var(--glass-border); border-radius:var(--radius-2xl); padding:48px; width:100%; max-width:480px; position:relative; z-index:1; animation:fadeInUp 0.6s ease; }
@keyframes fadeInUp { from{opacity:0;transform:translateY(30px)} to{opacity:1;transform:translateY(0)} }
.auth-card .logo { text-align:center; margin-bottom:32px; }
.auth-card .logo .logo-badge { width:64px; height:64px; margin:0 auto 16px; background:var(--accent-gradient); border-radius:var(--radius-lg); display:flex; align-items:center; justify-content:center; font-size:28px; color:#000; box-shadow:var(--accent-glow); }
.auth-card .logo h1 { font-size:28px; font-weight:800; background:var(--accent-gradient); -webkit-background-clip:text; -webkit-text-fill-color:transparent; }
.auth-card .logo p { color:var(--text-muted); font-size:14px; margin-top:4px; }
.auth-card .links { text-align:center; margin-top:20px; font-size:14px; color:var(--text-secondary); }
.auth-card .links a { color:var(--accent-primary); text-decoration:none; font-weight:600; }

/* Questionnaire */
.questionnaire-step { display:none; animation:fadeInUp 0.4s ease; }
.questionnaire-step.active { display:block; }
.step-indicator { display:flex; justify-content:center; gap:8px; margin-bottom:32px; }
.step-dot { width:12px; height:12px; border-radius:50%; background:rgba(255,255,255,0.1); transition:var(--transition); }
.step-dot.active { background:var(--accent-primary); box-shadow:0 0 10px rgba(0,230,118,0.5); }
.step-dot.done { background:var(--accent-secondary); }

/* Empty */
.empty-state { text-align:center; padding:60px 20px; color:var(--text-muted); }
.empty-state i { font-size:64px; margin-bottom:16px; opacity:0.3; }
.empty-state h3 { font-size:18px; margin-bottom:8px; color:var(--text-secondary); }
.empty-state p { font-size:14px; margin-bottom:24px; }

.chart-container { position:relative; height:300px; margin-top:16px; }

/* Quick Actions */
.quick-actions { display:flex; gap:12px; flex-wrap:wrap; }
.quick-action-btn { display:flex; align-items:center; gap:8px; padding:12px 20px; background:var(--bg-card); border:1px solid var(--glass-border); border-radius:var(--radius-xl); color:var(--text-primary); text-decoration:none; font-size:13px; font-weight:500; transition:var(--transition); }
.quick-action-btn:hover { background:var(--bg-card-hover); transform:translateY(-2px); box-shadow:var(--glass-shadow); }
.quick-action-btn i { font-size:16px; color:var(--accent-primary); }

/* Photo gallery */
.photo-gallery { display:grid; grid-template-columns:repeat(auto-fill,minmax(160px,1fr)); gap:16px; }
.photo-item { border-radius:var(--radius-md); overflow:hidden; aspect-ratio:3/4; position:relative; cursor:pointer; border:1px solid var(--glass-border); }
.photo-item img { width:100%; height:100%; object-fit:cover; transition:var(--transition); }
.photo-item:hover img { transform:scale(1.05); }

/* Loading */
.loading-spinner { display:inline-block; width:40px; height:40px; border:3px solid rgba(255,255,255,0.1); border-top-color:var(--accent-primary); border-radius:50%; animation:spin 0.8s linear infinite; }
@keyframes spin { to{transform:rotate(360deg)} }
.loading-overlay { position:fixed; inset:0; background:rgba(10,10,26,0.8); display:flex; align-items:center; justify-content:center; z-index:9999; flex-direction:column; gap:16px; }
.loading-text { color:var(--accent-primary); font-size:14px; font-weight:600; }

/* Mobile */
.mobile-toggle { display:none; position:fixed; top:16px; left:16px; z-index:200; width:44px; height:44px; background:var(--bg-card); border:1px solid var(--glass-border); border-radius:var(--radius-md); align-items:center; justify-content:center; color:var(--text-primary); font-size:20px; cursor:pointer; }
@media(max-width:768px) {
    .mobile-toggle { display:flex; }
    .sidebar { transform:translateX(-100%); }
    .sidebar.open { transform:translateX(0); }
    .main-content { margin-left:0; padding:20px 16px; padding-top:70px; }
    .stats-grid { grid-template-columns:repeat(2,1fr); }
    .grid-2,.grid-3 { grid-template-columns:1fr; }
    .form-row,.form-row-3 { grid-template-columns:1fr; }
    .page-header h2 { font-size:22px; }
    .auth-card { margin:16px; padding:32px 24px; }
}
@media(max-width:480px) { .stats-grid { grid-template-columns:1fr; } }