:root {
    --kolor-glowny: #4F46E5;
    --kolor-glowny-ciemny: #3730A3;
    --kolor-glowny-jasny: #EEF2FF;
    --kolor-akcent: #7C3AED;
    --kolor-tlo: #F8FAFC;
    --kolor-bialy: #ffffff;
    --kolor-szary-jasny: #F1F5F9;
    --kolor-szary: #94A3B8;
    --kolor-szary-ciemny: #475569;
    --kolor-tekst: #0F172A;
    --kolor-tekst-jasny: #64748B;
    --kolor-blad: #EF4444;
    --kolor-sukces: #10B981;
    --kolor-ostrzezenie: #F59E0B;
    --kolor-border: #E2E8F0;
    --zaokraglenie: 10px;
    --zaokraglenie-lg: 14px;
    --zaokraglenie-xl: 20px;
    --cien: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
    --cien-md: 0 4px 16px rgba(0,0,0,.08), 0 2px 4px rgba(0,0,0,.04);
    --cien-hover: 0 8px 32px rgba(79,70,229,.16), 0 2px 8px rgba(0,0,0,.06);
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --przejscie: .2s cubic-bezier(.4, 0, .2, 1);
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(14px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

@keyframes shimmer {
    0%   { background-position: -400px 0; }
    100% { background-position:  400px 0; }
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    height: 100%;
    font-family: var(--font);
    font-size: 18px;
    color: var(--kolor-tekst);
    background: var(--kolor-tlo);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a { color: var(--kolor-glowny); text-decoration: none; }
a:hover { color: var(--kolor-glowny-ciemny); }

/* ===== Loading ===== */
.ladowanie {
    display: flex;
    flex-direction: column;
    gap: .85rem;
    padding: 2rem 0;
    animation: fadeIn .25s ease;
}

.ladowanie::before,
.ladowanie::after {
    content: '';
    display: block;
    height: 80px;
    border-radius: var(--zaokraglenie-lg);
    background: linear-gradient(90deg, #f1f5f9 25%, #e2e8f0 50%, #f1f5f9 75%);
    background-size: 400px 100%;
    animation: shimmer 1.4s ease infinite;
}

.ladowanie::after { height: 60px; opacity: .6; }

/* ===== Empty & error states ===== */
.brak-danych {
    color: var(--kolor-szary);
    padding: 3rem 2rem;
    text-align: center;
    background: var(--kolor-szary-jasny);
    border-radius: var(--zaokraglenie-lg);
    font-size: .95rem;
    border: 1.5px dashed var(--kolor-border);
}

.alert-error {
    background: #FEF2F2;
    border: 1px solid #FECACA;
    color: #B91C1C;
    padding: .75rem 1rem;
    border-radius: var(--zaokraglenie);
    margin: .75rem 0;
    font-size: .88rem;
    animation: fadeInUp .2s ease;
}

.alert-success {
    background: #F0FDF4;
    border: 1px solid #BBF7D0;
    color: #15803D;
    padding: .75rem 1rem;
    border-radius: var(--zaokraglenie);
    margin: .75rem 0;
    font-size: .88rem;
    animation: fadeInUp .2s ease;
}

/* ===== Form controls (shared) ===== */
.form-control {
    width: 100%;
    padding: .6rem .9rem;
    border: 1.5px solid var(--kolor-border);
    border-radius: var(--zaokraglenie);
    font-size: .9rem;
    font-family: var(--font);
    outline: none;
    transition: border-color var(--przejscie), box-shadow var(--przejscie), background var(--przejscie);
    background: white;
    color: var(--kolor-tekst);
}

.form-control:focus {
    border-color: var(--kolor-glowny);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, .1);
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--kolor-border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--kolor-szary); }