/* ESIR Fiskal — Aero/Glassmorphism dizajn sistem */

:root {
    --grad-start: #6366f1;     /* indigo-500 */
    --grad-mid:   #8b5cf6;     /* violet-500 */
    --grad-end:   #06b6d4;     /* cyan-500 */
    --bg-pattern: radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.10) 0%, transparent 40%),
                  radial-gradient(at 100% 0%, rgba(139, 92, 246, 0.08) 0%, transparent 40%),
                  radial-gradient(at 50% 100%, rgba(6, 182, 212, 0.07) 0%, transparent 40%);
}

* { box-sizing: border-box; }

html, body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    background: #f1f5f9;       /* slate-100 baza */
    background-image: var(--bg-pattern);
    background-attachment: fixed;
    background-repeat: no-repeat;
    background-size: 100% 100%;
    min-height: 100vh;
    color: #0f172a;            /* slate-900 */
}

/* GLASS — frosted glass kartice */
.glass {
    background: rgba(255, 255, 255, 0.72);
    backdrop-filter: blur(14px) saturate(180%);
    -webkit-backdrop-filter: blur(14px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.6);
    box-shadow:
        0 8px 32px rgba(15, 23, 42, 0.08),
        inset 0 1px 0 rgba(255, 255, 255, 0.5);
}

.glass-dark {
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(14px);
    color: white;
}

/* NAVBAR — sticky glass */
.aero-nav {
    background: rgba(255, 255, 255, 0.78);
    backdrop-filter: blur(20px) saturate(200%);
    -webkit-backdrop-filter: blur(20px) saturate(200%);
    border-bottom: 1px solid rgba(148, 163, 184, 0.18);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.4);
}

.aero-nav a.active {
    background: linear-gradient(135deg, var(--grad-start), var(--grad-mid));
    color: white !important;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.35);
}

/* GRADIENT dugme primarno */
.btn-gradient {
    background: linear-gradient(135deg, var(--grad-start), var(--grad-mid));
    color: white;
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
    transition: transform 0.15s ease, box-shadow 0.2s ease;
}
.btn-gradient:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.45);
}
.btn-gradient:active { transform: translateY(0); }

/* GRADIENT teksta (za naslove) */
.grad-text {
    background: linear-gradient(135deg, var(--grad-start), var(--grad-mid), var(--grad-end));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

/* GLOWING dot indikator */
.glow-dot {
    width: 8px;
    height: 8px;
    background: #10b981;
    border-radius: 50%;
    box-shadow: 0 0 8px rgba(16, 185, 129, 0.7);
    display: inline-block;
}

/* Smooth animation za karte */
.card-hover {
    transition: transform 0.2s ease, box-shadow 0.25s ease;
}
.card-hover:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(15, 23, 42, 0.12);
}

/* Scrollbar */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
    background: rgba(100, 116, 139, 0.4);
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover { background: rgba(100, 116, 139, 0.6); }

/* Fokus stilovi */
input:focus, select:focus, textarea:focus {
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.18);
    outline: none;
}

/* Animacija pojavljivanja */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}
.fade-up { animation: fadeUp 0.35s ease-out; }

/* ============== PWA / MOBILNI / TABLET ============== */

/* Standalone mode (kad je instaliran kao PWA na home screen) - sakri navbar info */
@media (display-mode: standalone) {
    .hide-in-pwa { display: none !important; }
}

/* Touch-friendly: minimalna velicina ciljnih elemenata na touch uredjajima */
@media (pointer: coarse) {
    button, .btn-gradient, a.btn, input[type="submit"], select, input[type="number"], input[type="text"] {
        min-height: 40px;
    }
    /* Veci tap targeti u kasi */
    .kasa-tap { min-height: 56px !important; font-size: 1rem !important; }
    /* Kategorije i artikli grid - veci paddingi */
    .kasa-artikal-btn { padding: 14px 8px !important; min-height: 70px !important; }
}

/* Tablet (768-1024px) - kasa moze imati manje kolone */
@media (min-width: 640px) and (max-width: 1024px) {
    .kasa-grid-9 { grid-template-columns: repeat(7, 1fr) !important; }
}

/* iOS safe area (notch) */
@supports (padding: max(0px)) {
    .aero-nav { padding-left: max(12px, env(safe-area-inset-left)); padding-right: max(12px, env(safe-area-inset-right)); }
    body { padding-bottom: env(safe-area-inset-bottom); }
}

/* Install banner */
#pwa-install-banner {
    position: fixed;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 100;
    background: white;
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: 16px;
    padding: 12px 16px;
    box-shadow: 0 8px 32px rgba(99, 102, 241, 0.25);
    display: none;
    align-items: center;
    gap: 12px;
    max-width: 90vw;
}
#pwa-install-banner.show { display: flex; }