* {
    box-sizing: border-box;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
                 Roboto, Oxygen, Ubuntu, Cantarell, "Helvetica Neue", Arial, sans-serif;
}

body {
    margin: 0;
    background: linear-gradient(120deg, #eef2f7, #f9fbfd);
    color: #222;
}

/* =========================
   GŁÓWNY KONTENER APPKI
========================= */
.container {
    max-width: 900px;
    margin: 40px auto;
    padding: 30px;
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
}

/* =========================
   NAGŁÓWKI
========================= */
h1, h2, h3 {
    margin-top: 0;
}

h1 {
    margin-bottom: 25px;
}

h2 {
    margin-top: 30px;
    margin-bottom: 10px;
}

/* =========================
   INPUTY / SELECTY
========================= */
input, select {
    padding: 10px;
    font-size: 14px;
    border-radius: 6px;
    border: 1px solid #ccc;
    width: 240px;
}

input[type="date"],
input[type="number"] {
    width: 200px;
}

button {
    padding: 10px 14px;
    font-size: 14px;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    background: #2ecc71;
    color: white;
}

button:hover {
    opacity: 0.9;
}

/* =========================
   AKTYWNY TRENING
========================= */
#trainingInfo {
    margin-top: 15px;
    padding: 12px 16px;
    border-radius: 8px;
    background: #eafaf1;
    border: 1px solid #2ecc71;
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

/* =========================
   LISTA ĆWICZEŃ
========================= */
#workouts {
    list-style: none;
    padding: 0;
    margin-top: 25px;
}

#workouts > li {
    background: #fdfdfd;
    border-radius: 10px;
    padding: 16px;
    margin-bottom: 16px;
    border: 1px solid #e5e7eb;
}

/* =========================
   NAGŁÓWEK ĆWICZENIA
========================= */
#workouts strong {
    font-size: 16px;
}

/* =========================
   FORM SERII
========================= */
#workouts form {
    margin-top: 10px;
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

/* =========================
   SERIE
========================= */
#workouts ul {
    list-style: none;
    padding-left: 0;
    margin-top: 10px;
}

#workouts ul li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 0;
}

/* =========================
   PRZYCISKI USUWANIA
========================= */
button.delete {
    background: #e74c3c;
    padding: 6px 10px;
    font-size: 12px;
}

/* =========================
   FORM DODAWANIA ĆWICZENIA
========================= */
#exerciseForm {
    margin-top: 30px;
    padding: 20px;
    background: #f9fafb;
    border-radius: 10px;
    border: 1px solid #e5e7eb;
}