:root {
    --safe-top: env(safe-area-inset-top, 0px);
    --safe-bottom: env(safe-area-inset-bottom, 0px);
    --font: 'Inter', system-ui, -apple-system, sans-serif;
    --glass: rgba(255,255,255,0.07);
    --glass-border: rgba(255,255,255,0.12);
    --glass-hover: rgba(255,255,255,0.14);
    --text-1: #ffffff;
    --text-2: rgba(255,255,255,0.7);
    --text-3: rgba(255,255,255,0.45);
    --accent: #60a5fa;
    --uv-low: #4ade80;
    --uv-mod: #facc15;
    --uv-high: #fb923c;
    --uv-vhigh: #ef4444;
    --uv-extreme: #a855f7;
    --radius: 20px;
    --radius-sm: 14px;
}

* { margin:0; padding:0; box-sizing:border-box; -webkit-tap-highlight-color:transparent; }

body, html {
    width:100%; height:100%;
    font-family: var(--font);
    color: var(--text-1);
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 40%, #0c4a6e 100%);
    background-attachment: fixed;
    overflow: hidden;
}

#hidden-video, #hidden-canvas { position:absolute; width:1px; height:1px; opacity:0; pointer-events:none; }

.hidden { display:none !important; }

/* Shell */
.app-shell {
    width:100%; height:100%;
    display:flex; flex-direction:column;
    max-width:520px;
    margin:0 auto;
    padding: calc(var(--safe-top) + 8px) 16px calc(var(--safe-bottom) + 8px);
}

/* Header */
.app-header {
    display:flex; justify-content:space-between; align-items:center;
    padding:8px 0 4px; flex-shrink:0;
}
.header-left { display:flex; flex-direction:column; gap:4px; }
.brand {
    font-size:12px; font-weight:700; letter-spacing:2.5px; text-transform:uppercase;
    display:flex; align-items:center; gap:6px; color:var(--text-1);
}
.brand-icon { width:14px; height:14px; }
.loc-badge {
    display:inline-flex; align-items:center; gap:4px;
    background:rgba(0,0,0,0.3); border:1px solid var(--glass-border);
    border-radius:20px; padding:4px 10px; font-size:11px;
    color:var(--text-2); cursor:pointer; font-family:var(--font);
    backdrop-filter:blur(6px); transition:background .2s;
}
.loc-badge:hover { background:rgba(0,0,0,0.5); }
.loc-icon { width:10px; height:10px; }

/* Search */
.search-wrap { position:relative; margin:10px 0 8px; flex-shrink:0; }
.search-bar {
    display:flex; align-items:center;
    background:var(--glass); border:1px solid var(--glass-border);
    border-radius:28px; padding:6px 12px;
    backdrop-filter:blur(16px); transition:border-color .3s, box-shadow .3s;
}
.search-bar:focus-within {
    border-color:rgba(255,255,255,0.35);
    box-shadow:0 8px 32px rgba(0,0,0,0.3);
}
.search-icon { width:18px; height:18px; color:var(--text-3); margin-right:8px; flex-shrink:0; }
.search-bar input {
    flex:1; background:none; border:none; outline:none;
    color:var(--text-1); font-size:15px; font-family:var(--font); padding:8px 0;
}
.search-bar input::placeholder { color:var(--text-3); }
.gps-btn {
    background:rgba(255,255,255,0.1); border:1px solid rgba(255,255,255,0.15);
    border-radius:50%; width:36px; height:36px;
    display:flex; align-items:center; justify-content:center;
    cursor:pointer; transition:background .2s; flex-shrink:0;
}
.gps-btn:hover { background:rgba(255,255,255,0.25); }
.gps-icon { width:16px; height:16px; color:var(--text-1); }

.error-toast {
    position:absolute; top:54px; left:50%; transform:translateX(-50%);
    background:rgba(239,68,68,0.9); padding:6px 16px; border-radius:20px;
    font-size:13px; white-space:nowrap; z-index:20; backdrop-filter:blur(4px);
}

/* Main Scroll */
.main-scroll {
    flex:1; overflow-y:auto; overflow-x:hidden;
    -webkit-overflow-scrolling:touch;
    scrollbar-width:none; padding-bottom:20px;
}
.main-scroll::-webkit-scrollbar { display:none; }

/* Loader */
.loader-box {
    display:flex; flex-direction:column; align-items:center; justify-content:center;
    height:300px; color:var(--text-2);
}
.spinner {
    width:36px; height:36px;
    border:3px solid rgba(255,255,255,0.15); border-top-color:#fff;
    border-radius:50%; animation:spin .8s linear infinite; margin-bottom:14px;
}
@keyframes spin { to { transform:rotate(360deg); } }

/* Weather Content */
.weather-content { animation:fadeUp .6s ease-out both; }
@keyframes fadeUp { from { opacity:0; transform:translateY(16px); } to { opacity:1; transform:translateY(0); } }

/* Current Weather */
.current-section { text-align:center; padding:16px 0 20px; }
.city-name { font-size:2rem; font-weight:700; letter-spacing:.5px; }
.current-date { font-size:.9rem; color:var(--text-2); margin:2px 0 16px; }
.temp-row { display:flex; justify-content:center; align-items:center; gap:12px; margin:8px 0; }
.weather-icon-big svg { width:64px; height:64px; filter:drop-shadow(0 4px 8px rgba(0,0,0,.25)); animation:float 4s ease-in-out infinite; }
@keyframes float { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-8px)} }
.temp-value { font-size:4.5rem; font-weight:700; line-height:1; }
.temp-unit { font-size:2rem; font-weight:300; }
.weather-desc { font-size:1.1rem; color:var(--text-2); text-transform:capitalize; margin-top:4px; }

/* Stats Grid */
.stats-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:8px; margin-bottom:14px; }
.stat-card {
    display:flex; flex-direction:column; align-items:center;
    background:var(--glass); border:1px solid var(--glass-border);
    border-radius:var(--radius-sm); padding:12px 4px;
    backdrop-filter:blur(10px); transition:transform .2s, background .2s;
}
.stat-card:hover { transform:translateY(-3px); background:var(--glass-hover); }
.stat-card svg { width:20px; height:20px; margin-bottom:6px; color:var(--accent); }
.stat-label { font-size:.65rem; color:var(--text-3); margin-bottom:2px; white-space:nowrap; }
.stat-val { font-size:.9rem; font-weight:600; }

/* Card */
.card {
    background:var(--glass); border:1px solid var(--glass-border);
    border-radius:var(--radius); padding:16px;
    backdrop-filter:blur(12px); margin-bottom:14px;
}
.card-header { display:flex; justify-content:space-between; align-items:center; margin-bottom:12px; }
.card-header h3 { font-size:.95rem; font-weight:600; display:flex; align-items:center; gap:6px; }
.card-h-icon { width:16px; height:16px; }
.card-title { font-size:.95rem; font-weight:600; margin-bottom:12px; padding-bottom:8px; border-bottom:1px solid var(--glass-border); }

/* UV Section */
.uv-display { display:flex; gap:16px; align-items:center; }
.uv-gauge { flex:1; }
.uv-bar-track {
    position:relative; height:10px; border-radius:5px;
    background:linear-gradient(90deg, var(--uv-low) 0%, var(--uv-mod) 27%, var(--uv-high) 55%, var(--uv-vhigh) 73%, var(--uv-extreme) 100%);
    overflow:visible;
}
.uv-bar-fill { height:100%; border-radius:5px; }
.uv-bar-pointer {
    position:absolute; top:50%; width:16px; height:16px;
    background:#fff; border-radius:50%; border:2px solid rgba(0,0,0,.3);
    transform:translate(-50%,-50%); transition:left .5s ease; left:0%;
    box-shadow:0 2px 6px rgba(0,0,0,.4);
}
.uv-scale-labels { display:flex; justify-content:space-between; font-size:.6rem; color:var(--text-3); margin-top:4px; }
.uv-info { text-align:center; min-width:90px; }
.uv-number { font-size:2.2rem; font-weight:700; line-height:1; }
.uv-severity { font-size:.8rem; font-weight:600; margin:2px 0; padding:2px 8px; border-radius:8px; display:inline-block; }
.uv-advice { font-size:.7rem; color:var(--text-2); line-height:1.3; margin-top:4px; }

/* Button */
.btn-action {
    display:flex; align-items:center; gap:5px;
    background:rgba(96,165,250,0.25); border:1px solid rgba(96,165,250,0.5);
    color:#fff; padding:6px 12px; border-radius:20px;
    cursor:pointer; font-size:.8rem; font-weight:500; font-family:var(--font);
    transition:background .2s, transform .1s; white-space:nowrap;
}
.btn-action:hover { background:rgba(96,165,250,0.45); }
.btn-action:active { transform:scale(.97); }
.btn-action svg { width:14px; height:14px; }
.btn-action.active { background:rgba(74,222,128,0.3); border-color:rgba(74,222,128,0.7); }

/* Spectrum Panel */
.spectrum-panel { animation:fadeUp .4s ease-out both; }
.spectrum-chart-wrap {
    background:rgba(0,0,0,0.35); border-radius:12px; padding:8px 8px 4px;
    margin-bottom:10px;
}
.spectrum-range-label {
    display:flex; justify-content:space-between; font-size:.55rem; color:var(--text-3);
    margin-bottom:2px; padding:0 2px; font-family:monospace;
}
#spectrum-canvas { width:100%; height:120px; display:block; }

/* Band Grid */
.band-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:6px; margin-bottom:10px; }
.band-item {
    display:flex; flex-direction:column; align-items:center;
    background:rgba(0,0,0,0.25); border-radius:10px; padding:8px 2px;
    border-left:3px solid var(--band-color);
    transition:background .2s;
}
.band-item:hover { background:rgba(0,0,0,0.4); }
.band-name { font-size:.6rem; font-weight:600; color:var(--text-2); }
.band-range { font-size:.5rem; color:var(--text-3); font-family:monospace; }
.band-val { font-size:.85rem; font-weight:700; margin-top:2px; color:var(--band-color); }

/* Coefficient Grid */
.coeff-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:6px; margin-bottom:10px; }
.coeff-item {
    display:flex; flex-direction:column; align-items:center;
    background:rgba(0,0,0,0.2); border-radius:10px; padding:8px 4px;
}
.coeff-label { font-size:.55rem; color:var(--text-3); text-align:center; line-height:1.2; }
.coeff-val { font-size:.8rem; font-weight:700; margin-top:2px; color:var(--accent); font-family:monospace; }

/* Spectrum Summary */
.spectrum-summary {
    display:flex; justify-content:space-around;
    font-size:.8rem; color:var(--text-2);
    background:rgba(0,0,0,0.2); border-radius:10px; padding:8px;
}
.sv-uv { font-weight:700; color:#a855f7; margin-left:4px; }
.sv-vis { font-weight:700; color:#60a5fa; margin-left:4px; }
.sv-ir { font-weight:700; color:#f43f5e; margin-left:4px; }

/* Advice Section */
.advice-tabs { display:flex; gap:0; margin-bottom:12px; border-bottom:1px solid var(--glass-border); }
.tab-btn {
    flex:1; background:none; border:none; color:var(--text-3);
    font-size:.8rem; padding:8px 4px; cursor:pointer;
    font-family:var(--font); position:relative; transition:color .2s;
}
.tab-btn.active { color:#fff; font-weight:600; }
.tab-btn.active::after {
    content:''; position:absolute; bottom:-1px; left:10%; width:80%; height:2px;
    background:var(--accent); border-radius:1px;
}
.advice-body { font-size:.9rem; line-height:1.7; color:var(--text-2); min-height:60px; }
.advice-body .hl { color:var(--accent); font-weight:500; }
.advice-body .warn { color:#fb923c; font-weight:500; }
.advice-body .danger { color:#ef4444; font-weight:500; }

/* Forecast */
.forecast-row { display:flex; justify-content:space-between; gap:6px; }
.forecast-item {
    display:flex; flex-direction:column; align-items:center;
    flex:1; padding:10px 0; border-radius:var(--radius-sm);
    transition:background .2s; cursor:default;
}
.forecast-item:hover { background:rgba(255,255,255,0.06); }
.forecast-day { font-size:.8rem; color:var(--text-2); margin-bottom:6px; }
.forecast-icon svg { width:22px; height:22px; margin-bottom:6px; }
.forecast-temp { font-weight:600; font-size:.9rem; }
.forecast-rain { font-size:.6rem; color:var(--accent); margin-top:2px; }

/* Footer */
.app-footer { text-align:center; padding:20px 0 8px; font-size:.65rem; color:var(--text-3); }

/* Responsive */
@media (max-width:380px) {
    .stats-grid { grid-template-columns:repeat(2,1fr); }
    .band-grid { grid-template-columns:repeat(3,1fr); }
    .coeff-grid { grid-template-columns:repeat(2,1fr); }
    .temp-value { font-size:3.5rem; }
}
@media (min-width:520px) {
    .app-shell { padding-left:24px; padding-right:24px; }
}