/* ====== ZÁKLAD ====== */
body {
    margin: 0;
    font-family: "Segoe UI", Arial, sans-serif;
    background: #eef3f9;
    color: #1a2a44;
}

a {
    text-decoration: none;
    color: inherit;
}

/* ====== HEADER ====== */
header {
    background: #ffffff;
    border-bottom: 1px solid #d6e0ee;
    padding: 15px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    font-size: 1.6rem;
    font-weight: bold;
    color: #1976d2;
}

.logo span {
    color: #0d47a1;
}

nav a {
    margin-left: 20px;
    font-size: 1rem;
    color: #1a2a44;
    font-weight: 500;
}

nav a:hover {
    color: #1976d2;
}

/* ====== HERO ====== */
.hero {
    background: linear-gradient(135deg, #e3f2fd, #bbdefb);
    padding: 80px 40px;
    text-align: center;
    border-bottom: 1px solid #d6e0ee;
}

.hero h1 {
    font-size: 2.8rem;
    margin-bottom: 15px;
    color: #0d47a1;
}

.hero p {
    font-size: 1.2rem;
    max-width: 700px;
    margin: auto;
    color: #455a64;
}

.btn-primary {
    display: inline-block;
    margin-top: 25px;
    padding: 14px 28px;
    background: #1976d2;
    color: #fff;
    border-radius: 6px;
    font-size: 1.1rem;
    font-weight: bold;
}

.btn-primary:hover {
    background: #0d47a1;
}

/* ====== OBSAH ====== */
.container {
    max-width: 1200px;
    margin: auto;
    padding: 40px 20px;
}

h2 {
    color: #0d47a1;
    margin-bottom: 10px;
    font-size: 2rem;
}

.section-sub {
    color: #455a64;
    margin-bottom: 30px;
}

/* ====== KARTY ====== */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 25px;
}

.card {
    background: #ffffff;
    border-radius: 10px;
    padding: 25px;
    border: 1px solid #d6e0ee;
    box-shadow: 0 3px 10px rgba(0,0,0,0.05);
    transition: 0.2s;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 16px rgba(0,0,0,0.12);
}

.card h3 {
    margin-top: 0;
    color: #1976d2;
}

.card p {
    color: #455a64;
}

/* ====== STEPS ====== */
.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
}

.step {
    background: #ffffff;
    border-radius: 10px;
    padding: 20px;
    border: 1px solid #d6e0ee;
}

.step-number {
    width: 30px;
    height: 30px;
    background: #1976d2;
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 10px;
    font-weight: bold;
}

/* ====== CTA STRIP ====== */
.cta-strip {
    background: linear-gradient(135deg, #bbdefb, #90caf9);
    padding: 30px 25px;
    border-radius: 12px;
    margin-top: 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.cta-strip-title {
    font-size: 1.4rem;
    color: #0d47a1;
}

.cta-strip-sub {
    color: #455a64;
    margin-top: 5px;
}

/* ====== FOOTER ====== */
footer {
    background: #1976d2;
    color: #e3f2fd;
    padding: 20px 40px;
    text-align: center;
    margin-top: 40px;
}

/* ====== CHAT BUBBLE ====== */
#chat-bubble {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: #1976d2;
    color: #fff;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display:flex;
    justify-content:center;
    align-items:center;
    font-size: 28px;
    cursor:pointer;
    box-shadow:0 4px 10px rgba(0,0,0,0.25);
    z-index:9999;
}

/* ====== CHAT WINDOW ====== */
#chat-window {
    position: fixed;
    bottom: 90px;
    right: 20px;
    width: 320px;
    height: 420px;
    background:#ffffff;
    border-radius:10px;
    border:1px solid #d0d9e6;
    box-shadow:0 4px 20px rgba(0,0,0,0.25);
    display:none;
    flex-direction:column;
    overflow:hidden;
    z-index:9999;
}

#chat-header {
    background:#1976d2;
    color:#fff;
    padding:12px;
    font-size:16px;
    display:flex;
    justify-content:space-between;
    align-items:center;
}

#chat-messages {
    flex:1;
    padding:10px;
    overflow-y:auto;
    background:#f4f7fb;
}

#chat-input-area {
    display:flex;
    border-top:1px solid #d0d9e6;
}

#chat-input {
    flex:1;
    padding:10px;
    border:none;
    background:#ffffff;
}

#chat-send {
    width:50px;
    background:#1976d2;
    color:#fff;
    border:none;
    cursor:pointer;
}

/* ====== RESPONSIVE ====== */
@media (max-width: 600px) {
    #chat-window {
        width: 90%;
        right: 5%;
        height: 60%;
    }
}

#chat-bubble {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: #1976d2;
    color: #fff;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display:flex;
    justify-content:center;
    align-items:center;
    font-size: 28px;
    cursor:pointer;
    box-shadow:0 4px 10px rgba(0,0,0,0.25);
    z-index:9999;
}

#chat-window {
    position: fixed;
    bottom: 90px;
    right: 20px;
    width: 320px;
    height: 420px;
    background:#ffffff;
    border-radius:10px;
    border:1px solid #d0d9e6;
    box-shadow:0 4px 20px rgba(0,0,0,0.25);
    display:none;
    flex-direction:column;
    overflow:hidden;
    z-index:9999;
}