/* ============================================================
   AI Vijesti — moderni CSS
   - Light/dark mode preko data-theme atributa
   - System font stack (bez vanjskih CDN-ova)
   - Mobile-first, responsive grid
   ============================================================ */

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

:root {
    --bg:            #fafafa;
    --bg-card:       #ffffff;
    --bg-elev:       #f4f4f5;
    --text:          #18181b;
    --text-muted:    #71717a;
    --text-dim:      #a1a1aa;
    --border:        #e4e4e7;
    --border-soft:   #f1f1f3;
    --accent:        #2563eb;
    --accent-hover:  #1d4ed8;
    --accent-soft:   #eff6ff;
    --notice:        #dc2626;
    --notice-bg:     #fef2f2;
    --notice-border: #fecaca;
    --shadow-sm:     0 1px 2px rgba(0,0,0,0.04);
    --shadow:        0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-hover:  0 8px 24px rgba(0,0,0,0.10), 0 2px 4px rgba(0,0,0,0.04);

    /* Category accents */
    --cat-politics:  #dc2626;
    --cat-tech:      #2563eb;
    --cat-it:        #7c3aed;
    --cat-finance:   #059669;
    --cat-science:   #d97706;

    --transition: 180ms ease;
    --radius:     12px;
    --radius-sm:  8px;
}

[data-theme="dark"] {
    --bg:            #09090b;
    --bg-card:       #18181b;
    --bg-elev:       #27272a;
    --text:          #fafafa;
    --text-muted:    #a1a1aa;
    --text-dim:      #71717a;
    --border:        #27272a;
    --border-soft:   #1f1f23;
    --accent:        #60a5fa;
    --accent-hover:  #93c5fd;
    --accent-soft:   #1e293b;
    --notice:        #ef4444;
    --notice-bg:     #1f0a0a;
    --notice-border: #7f1d1d;
    --shadow-sm:     0 1px 2px rgba(0,0,0,0.4);
    --shadow:        0 1px 3px rgba(0,0,0,0.5);
    --shadow-hover:  0 8px 32px rgba(0,0,0,0.7);

    --cat-politics:  #f87171;
    --cat-tech:      #60a5fa;
    --cat-it:        #a78bfa;
    --cat-finance:   #34d399;
    --cat-science:   #fbbf24;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', system-ui, Roboto, Oxygen, Ubuntu, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background var(--transition), color var(--transition);
}

.container { max-width: 1300px; margin: 0 auto; padding: 0 1.25rem; }

a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-hover); }

/* ============================ HEADER ============================ */

.hdr {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    backdrop-filter: saturate(180%) blur(8px);
    -webkit-backdrop-filter: saturate(180%) blur(8px);
}
.hdr-inner {
    max-width: 1300px;
    margin: 0 auto;
    padding: 0.85rem 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.hdr-logo {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    font-weight: 700;
    font-size: 1.15rem;
    color: var(--text) !important;
    letter-spacing: -0.01em;
}
.hdr-logo:hover { color: var(--text) !important; }
.hdr-logo-icon { font-size: 1.35rem; }

.theme-toggle {
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: 999px;
    width: 38px;
    height: 38px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.05rem;
    color: var(--text);
    transition: background var(--transition), border-color var(--transition);
    position: relative;
}
.theme-toggle:hover { background: var(--border); }
.theme-icon { position: absolute; transition: opacity 200ms ease, transform 200ms ease; }
.theme-icon-light { opacity: 1; transform: scale(1) rotate(0); }
.theme-icon-dark  { opacity: 0; transform: scale(0.7) rotate(-30deg); }
[data-theme="dark"] .theme-icon-light { opacity: 0; transform: scale(0.7) rotate(30deg); }
[data-theme="dark"] .theme-icon-dark  { opacity: 1; transform: scale(1) rotate(0); }

/* ============================ FILTER BAR ============================ */

.filterbar {
    position: sticky;
    top: 60px;
    z-index: 90;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
}
.filterbar-inner {
    max-width: 1300px;
    margin: 0 auto;
    padding: 0.9rem 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.region-toggle {
    display: inline-flex;
    background: var(--bg-elev);
    border-radius: 999px;
    padding: 4px;
    gap: 4px;
    align-self: flex-start;
}
.region-btn {
    padding: 0.4rem 1rem;
    border-radius: 999px;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-muted) !important;
    transition: background var(--transition), color var(--transition);
}
.region-btn:hover { color: var(--text) !important; }
.region-btn.is-active {
    background: var(--bg-card);
    color: var(--text) !important;
    box-shadow: var(--shadow-sm);
}

.chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}
.chip {
    background: var(--bg-elev);
    border: 1px solid transparent;
    border-radius: 999px;
    padding: 0.45rem 0.95rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-muted);
    cursor: pointer;
    transition: background var(--transition), color var(--transition), border-color var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-family: inherit;
}
.chip:hover:not(:disabled) { background: var(--border); color: var(--text); }
.chip.is-active {
    background: var(--text);
    color: var(--bg);
    border-color: var(--text);
}
.chip.is-active .chip-count { background: var(--bg); color: var(--text); }
.chip.is-empty {
    opacity: 0.4;
    cursor: not-allowed;
}
.chip-count {
    background: var(--bg-card);
    color: var(--text-muted);
    padding: 0.05rem 0.45rem;
    border-radius: 999px;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    min-width: 22px;
    text-align: center;
}

/* ============================ MAIN ============================ */

main.container { padding-top: 1.5rem; padding-bottom: 3rem; }

.lede {
    background: var(--accent-soft);
    border-left: 3px solid var(--accent);
    padding: 0.75rem 1rem;
    margin: 0 0 1.5rem;
    font-size: 0.875rem;
    color: var(--text-muted);
    border-radius: var(--radius-sm);
}

/* ============================ GRID ============================ */

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(330px, 1fr));
    gap: 1.5rem;
}

/* Filter active state — hide non-matching cards */
.grid[data-active-cat="politics"]  .card:not([data-category="politics"]),
.grid[data-active-cat="tech"]      .card:not([data-category="tech"]),
.grid[data-active-cat="it"]        .card:not([data-category="it"]),
.grid[data-active-cat="finance"]   .card:not([data-category="finance"]),
.grid[data-active-cat="science"]   .card:not([data-category="science"]) {
    display: none;
}

/* ============================ CARD ============================ */

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.1rem 1.2rem 1rem;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
    border-color: var(--text-dim);
}

.card-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.6rem;
    gap: 0.5rem;
}

.badge {
    display: inline-block;
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 0.25rem 0.65rem;
    border-radius: 999px;
    color: white;
}
.badge-politics { background: var(--cat-politics); }
.badge-tech     { background: var(--cat-tech); }
.badge-it       { background: var(--cat-it); }
.badge-finance  { background: var(--cat-finance); }
.badge-science  { background: var(--cat-science); }

.card-time {
    font-size: 0.75rem;
    color: var(--text-dim);
    font-variant-numeric: tabular-nums;
}

.card-title {
    margin: 0 0 0.5rem;
    font-size: 1.08rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    line-height: 1.35;
    color: var(--text);
}

.card-body {
    color: var(--text-muted);
    font-size: 0.92rem;
    line-height: 1.55;
    margin: 0 0 1rem;
    flex: 1;
}

.card-sources {
    border-top: 1px solid var(--border-soft);
    padding-top: 0.7rem;
    margin-top: auto;
    font-size: 0.78rem;
    color: var(--text-dim);
    line-height: 1.5;
}
.src-label { font-weight: 600; margin-right: 0.4rem; }
.src-link {
    color: var(--text-muted) !important;
    border-bottom: 1px dotted var(--border);
    transition: color var(--transition), border-color var(--transition);
    font-weight: 500;
}
.src-link:hover {
    color: var(--accent) !important;
    border-bottom-color: var(--accent);
}
.src-sep { margin: 0 0.35rem; color: var(--text-dim); }

.cta {
    margin-top: 0.85rem;
    background: var(--bg-elev);
    color: var(--text);
    border: 1px solid var(--border);
    padding: 0.6rem 0.95rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.88rem;
    font-weight: 600;
    font-family: inherit;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    transition: background var(--transition), border-color var(--transition), transform var(--transition);
}
.cta:hover {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}
.cta:hover .cta-arrow { transform: translateX(3px); }
.cta:disabled {
    opacity: 0.6;
    cursor: progress;
    background: var(--bg-elev);
    color: var(--text-muted);
    border-color: var(--border);
}
.cta-arrow { transition: transform var(--transition); }

/* ============================ PRIVATE AI RESULT ============================ */

.private-result {
    margin-top: 0.95rem;
    border: 2px solid var(--notice);
    border-radius: var(--radius-sm);
    background: var(--notice-bg);
    padding: 0.95rem;
    animation: fadeIn 220ms ease-out;
}
.private-result .notice {
    background: var(--notice);
    color: white;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    font-size: 0.78rem;
    margin-bottom: 0.7rem;
}
.private-result h4 {
    margin: 0.6rem 0 0.3rem;
    font-size: 1rem;
    color: var(--text);
}
.private-result p {
    margin: 0.4rem 0;
    color: var(--text);
    font-size: 0.92rem;
}
.private-result ul {
    margin: 0.5rem 0 0;
    padding-left: 1.2rem;
    font-size: 0.85rem;
}
.private-result .error {
    color: var(--notice);
    font-weight: 600;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-4px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ============================ EMPTY STATE ============================ */

.empty {
    text-align: center;
    padding: 4rem 1rem;
    color: var(--text-muted);
}
.empty-icon { font-size: 3rem; margin-bottom: 1rem; }
.empty h2 { font-size: 1.3rem; margin: 0 0 0.5rem; color: var(--text); }
.empty p { margin: 0; font-size: 0.95rem; }

/* ============================ FOOTER ============================ */

.ftr {
    border-top: 1px solid var(--border);
    background: var(--bg-elev);
    padding: 1.8rem 0;
    font-size: 0.8rem;
    color: var(--text-muted);
    text-align: center;
}
.ftr p { margin: 0 0 0.4rem; }
.ftr-tech { color: var(--text-dim); font-size: 0.72rem; }

/* ============================ RESPONSIVE ============================ */

@media (max-width: 640px) {
    .container { padding: 0 1rem; }
    .hdr-inner { padding: 0.7rem 1rem; }
    .filterbar-inner { padding: 0.75rem 1rem; }
    .hdr-logo-text { font-size: 1.05rem; }
    .card { padding: 0.95rem 1rem 0.85rem; }
    .card-title { font-size: 1rem; }
    .filterbar { top: 56px; }
}