:root {
    --orange: #ff6200;
    --orange-dark: #e55800;
    --orange-light: #ff8533;
    --bg-color: #f8f9fa;
    --text-color: #2d3436;
    --text-muted: #636e72;
    --white: #ffffff;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 6px 12px rgba(0, 0, 0, 0.15);
    --radius: 12px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.container {
    background: var(--white);
    padding: 48px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    text-align: center;
    max-width: 500px;
    width: 100%;
}

h1 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-color);
}

.subtitle {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 32px;
}

.iban-display {
    background: var(--bg-color);
    border-radius: var(--radius);
    padding: 20px 24px;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    position: relative;
}

#iban {
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 1.35rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    color: var(--text-color);
}

.copy-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    color: var(--text-muted);
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.copy-btn:hover {
    background: var(--white);
    color: var(--orange);
}

.copy-btn.copied {
    color: #27ae60;
}

.generate-btn {
    background: var(--orange);
    color: var(--white);
    border: none;
    padding: 14px 32px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: var(--shadow);
}

.generate-btn:hover {
    background: var(--orange-dark);
    box-shadow: var(--shadow-hover);
    transform: translateY(-1px);
}

.generate-btn:active {
    transform: translateY(0);
}

.info {
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid #eee;
}

.info p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.6;
}

.info p + p {
    margin-top: 8px;
}

.info strong {
    color: var(--text-color);
}

@media (max-width: 480px) {
    .container {
        padding: 32px 24px;
    }

    h1 {
        font-size: 1.5rem;
    }

    #iban {
        font-size: 1.1rem;
    }

    .iban-display {
        padding: 16px;
        flex-wrap: wrap;
    }
}