/* ============================================
   HLAVIČKA - MAPA SKŘÍNĚK
   Verze: 6.0
   ============================================ */

/* === HLAVIČKA STRÁNKY === */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 2px solid var(--primary-color);
}

/* === TITULEK === */
.header h1 {
    margin: 0;
    font-size: 1.8em;
    color: var(--text-color);
}

.header h1 a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: bold;
    transition: color 0.2s ease;
}

.header h1 a:hover {
    color: var(--primary-hover);
    text-decoration: underline;
}

/* === OVLÁDACÍ PRVKY HLAVIČKY === */
.header-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: var(--font-size-base);
}

/* === RESET TLAČÍTKO === */
.reset-btn {
    color: var(--text-muted);
    text-decoration: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-medium);
    font-size: var(--font-size-small);
    transition: all 0.2s ease;
    background: transparent;
    cursor: pointer;
    font-weight: bold;
    display: inline-block;
}

.reset-btn:hover {
    color: var(--primary-color);
    border-color: var(--primary-color);
    background: rgba(74, 144, 217, 0.05);
}

.reset-btn:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* === FORMULÁŘ PRO ROZMĚRY MŘÍŽKY === */
.grid-form {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.grid-input-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.grid-label {
    font-size: var(--font-size-small);
    color: var(--text-muted);
    font-weight: bold;
    white-space: nowrap;
}

.grid-select {
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    font-size: var(--font-size-small);
    font-family: inherit;
    background: white;
    color: var(--text-color);
    cursor: pointer;
    min-width: 20px;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.grid-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(74, 144, 217, 0.15);
}

/* === RESPONZIVNÍ HLAVIČKA === */
@media (max-width: 900px) {
    .header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }

    .header h1 {
        font-size: 1.5em;
    }

    .header-controls {
        width: 100%;
        flex-wrap: wrap;
    }
}

@media (max-width: 480px) {
    .header {
        padding-bottom: var(--spacing-md);
    }

    .header h1 {
        font-size: 1.3em;
    }

    .header-controls {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }

    .grid-form {
        flex-direction: column;
        align-items: flex-start;
        width: 100%;
        gap: var(--spacing-sm);
    }

    .grid-input-group {
        width: 100%;
        justify-content: space-between;
    }

    .grid-select {
        flex: 1;
    }

    .grid-form .reset-btn {
        width: 100%;
        text-align: center;
    }

    .header-controls > .reset-btn {
        width: 100%;
        text-align: center;
    }
}