/* ==========================================================================
   ASKLTECH HUB - CORE DESIGN SYSTEM
   ========================================================================== */

/* 1. VARIABILI DI SISTEMA (Light Mode) */
:root {
    --bg-color: #F3F4F6;
    --card-bg: #FFFFFF;
    --text-main: #1F2937;
    --text-muted: #6B7280;
    --border-color: #E5E7EB;
    --primary: #2563EB;
    --success: #10B981;
    --warning: #F59E0B;
    --locked-bg: #F9FAFB;
    --locked-text: #9CA3AF;
    --nav-bg: rgba(255, 255, 255, 0.85);
    --shadow: 0 4px 6px -1px rgba(0,0,0,0.05);
}

/* 2. DARK MODE AUTOMATICA */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #111827;
        --card-bg: #1F2937;
        --text-main: #F9FAFB;
        --text-muted: #9CA3AF;
        --border-color: #374151;
        --primary: #3B82F6;
        --locked-bg: #111827;
        --locked-text: #6B7280;
        --nav-bg: rgba(31, 41, 55, 0.85);
        --shadow: 0 4px 6px -1px rgba(0,0,0,0.3);
    }
}

/* 3. RESET E IMPOSTAZIONI BASE */
body { 
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif; 
    background-color: var(--bg-color); 
    color: var(--text-main); 
    margin: 0; 
    padding: 0; 
    display: none; /* Sicurezza: Nascosto fino al check identità di Supabase */
    -webkit-tap-highlight-color: transparent; /* Rimuove il flash blu su mobile */
}

/* 4. APP HEADER (Sticky & Glassmorphism) */
.app-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--nav-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: max(15px, env(safe-area-inset-top)); /* Supporto Notch */
}

.app-header h1 {
    margin: 0;
    font-size: 1.4em;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

/* 5. STRUTTURA E GRIGLIE */
.dashboard { 
    max-width: 1200px; 
    margin: 0 auto; 
    padding: 20px 20px calc(90px + env(safe-area-inset-bottom)) 20px; 
}

.section-header { margin-bottom: 20px; margin-top: 30px; }
.section-title { font-size: 1.5em; margin: 0 0 5px 0; color: var(--text-main); display: flex; align-items: center; gap: 8px; }
.section-subtitle { color: var(--text-muted); font-size: 0.9em; margin: 0; line-height: 1.4; }

.grid-cards { 
    display: grid; 
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); 
    gap: 15px; 
}

/* 6. COMPONENTI CARD APP-LIKE */
.card-app {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 20px 15px;
    text-decoration: none;
    color: var(--text-main);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

/* Feedback Aptico Visivo */
.card-app:active:not(.card-disabled) {
    transform: scale(0.96);
}

.card-app strong { font-size: 1em; margin-bottom: 4px; }
.card-app span { font-size: 0.75em; color: var(--text-muted); }

/* 7. ICONE E GRADIENTI (Color Coding) */
.icon-container {
    width: 54px;
    height: 54px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 12px;
    color: white;
}

.bg-cardio { background: linear-gradient(135deg, #EF4444, #B91C1C); }
.bg-pharma { background: linear-gradient(135deg, #8B5CF6, #6D28D9); }
.bg-scores { background: linear-gradient(135deg, #10B981, #047857); }
.bg-pneumo { background: linear-gradient(135deg, #0EA5E9, #0369A1); }
.bg-neuro  { background: linear-gradient(135deg, #A855F7, #7E22CE); }

/* 8. FUNZIONI BLOCCATE */
.card-disabled {
    background-color: var(--locked-bg);
    opacity: 0.6;
    cursor: not-allowed;
    border-style: dashed;
}

.card-disabled .icon-container {
    background: var(--border-color);
    color: var(--locked-text);
}

.badge-locked {
    display: inline-block;
    background: var(--border-color);
    color: var(--text-muted);
    padding: 4px 8px;
    border-radius: 10px;
    font-size: 0.7em !important;
    margin-top: 8px;
    font-weight: 600;
}

/* 9. BOTTOM NAVIGATION BAR */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--nav-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-around;
    padding: 10px 0 calc(10px + env(safe-area-inset-bottom)) 0; /* Supporto iPhone Home Bar */
    z-index: 1000;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.75em;
    gap: 4px;
}

.nav-item.active { color: var(--primary); font-weight: 600; }

/* 10. PULSANTI E UTILITY */
.logout-btn, .back-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    text-decoration: none;
}
.logout-btn { color: #EF4444; }
.back-btn { color: var(--primary); }
.logout-btn:active, .back-btn:active { background-color: var(--border-color); }